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/**
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* '$RCSfile$'
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* Purpose: A Class that implements replication for metacat
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* Copyright: 2000 Regents of the University of California and the
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* National Center for Ecological Analysis and Synthesis
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* Authors: Chad Berkley
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* Release: @release@
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*
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* '$Author: tao $'
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* '$Date: 2005-11-08 14:14:16 -0800 (Tue, 08 Nov 2005) $'
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* '$Revision: 2724 $'
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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package edu.ucsb.nceas.metacat;
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import edu.ucsb.nceas.dbadapter.AbstractDatabase;
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import java.util.*;
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import java.util.Date;
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import java.io.*;
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import java.sql.*;
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import java.net.*;
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import java.lang.*;
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import java.text.*;
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import javax.servlet.*;
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import javax.servlet.http.*;
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import org.apache.log4j.Logger;
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import org.xml.sax.*;
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public class MetacatReplication extends HttpServlet implements Runnable
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{
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private long timeInterval;
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private Date firstTime;
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private boolean timedReplicationIsOn = false;
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Timer replicationDaemon;
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private static MetaCatUtil util = new MetaCatUtil();
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private Vector fileLocks = new Vector();
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private Thread lockThread = null;
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private static final AbstractDatabase dbAdapter = MetaCatUtil.dbAdapter;
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public static final String FORCEREPLICATEDELETE = "forcereplicatedelete";
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private static final String TIMEREPLICATION = "timedreplication";
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private static final String TIMEREPLICATIONINTERVAl = "timedreplicationinterval";
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private static final String FIRSTTIME = "firsttimedreplication";
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private static final int TIMEINTERVALLIMIT = 7200000;
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private static Logger logMetacat = Logger.getLogger(MetacatReplication.class);
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/**
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* Initialize the servlet by creating appropriate database connections
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*/
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public void init(ServletConfig config) throws ServletException
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{
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//initialize db connections to handle any update requests
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MetaCatUtil util = new MetaCatUtil();
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//deltaT = util.getOption("deltaT");
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//the default deltaT can be set from metacat.properties
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//create a thread to do the delta-T check but don't execute it yet
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replicationDaemon = new Timer(true);
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try
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{
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timedReplicationIsOn = (new Boolean(util.getOption(TIMEREPLICATION ).trim())).booleanValue();
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logMetacat.info("The timed replication on is"+timedReplicationIsOn);
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timeInterval = (new Long(util.getOption(TIMEREPLICATIONINTERVAl).trim())).longValue();
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logMetacat.warn("The timed replication time Inerval is "+ timeInterval);
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String firstTimeStr = util.getOption(FIRSTTIME);
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logMetacat.warn("first replication time form property is "+firstTimeStr);
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firstTime = ReplicationHandler.combinateCurrentDateAndGivenTime(firstTimeStr);
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logMetacat.warn("After combine current time, the real first time is "
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+firstTime.toString()+" minisec");
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// set up time replication if it is on
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if (timedReplicationIsOn)
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{
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replicationDaemon.scheduleAtFixedRate(new ReplicationHandler(), firstTime, timeInterval);
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MetacatReplication.replLog("deltaT handler started with rate=" +
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timeInterval + " mini seconds at " +firstTime.toString());
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}
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}
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catch (Exception e)
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{
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// the timed replication in Metacat.properties file has problem
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// so timed replication is setting to false;
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logMetacat.error("Couldn't set up timed replication "+
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" in Metacat replication servlet init because " +
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e.getMessage());
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MetacatReplication.replErrorLog("Couldn't set up timed replication "+
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" in Metacat replication servlet init because " +
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e.getMessage());
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timedReplicationIsOn = false;
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}
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}
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public void destroy()
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{
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replicationDaemon.cancel();
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}
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public void doGet (HttpServletRequest request, HttpServletResponse response)
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throws ServletException, IOException
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{
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// Process the data and send back the response
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handleGetOrPost(request, response);
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}
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public void doPost(HttpServletRequest request, HttpServletResponse response)
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throws ServletException, IOException
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{
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// Process the data and send back the response
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handleGetOrPost(request, response);
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}
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private void handleGetOrPost(HttpServletRequest request,
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HttpServletResponse response)
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throws ServletException, IOException
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{
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//PrintWriter out = response.getWriter();
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//ServletOutputStream outPut = response.getOutputStream();
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Hashtable params = new Hashtable();
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Enumeration paramlist = request.getParameterNames();
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// NOT NEEDED - doesn't provide enough security because of possible IP spoofing
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// REPLACED with running replication comminications over HTTPS
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// String requestingServerIP = request.getRemoteAddr();
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// InetAddress iaddr = InetAddress.getByName(requestingServerIP);
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// String requestingServer = iaddr.getHostName();
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while (paramlist.hasMoreElements()) {
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String name = (String)paramlist.nextElement();
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String[] value = request.getParameterValues(name);
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params.put(name, value);
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}
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String action = ((String[])params.get("action"))[0];
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String server = null;
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try {
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// check if the server is included in the list of replicated servers
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if ( !action.equals("servercontrol") &&
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!action.equals("stop") &&
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!action.equals("start") &&
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!action.equals("getall") ) {
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server = ((String[])params.get("server"))[0];
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if ( getServerCodeForServerName(server) == 0 ) {
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System.out.println("Action \"" + action +
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"\" rejected for server: " + server);
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return;
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} else {
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System.out.println("Action \"" + action +
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"\" accepted for server: " + server);
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}
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}
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else
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{
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// start, stop, getall and servercontrol need to check
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// if user is administor
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HttpSession sess = request.getSession(true);
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String sess_id = "";
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String username = "";
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String[] groupnames = {""};
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Hashtable sessionHash = MetaCatServlet.getSessionHash();
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if (params.containsKey("sessionid"))
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{
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sess_id = ((String[]) params.get("sessionid"))[0];
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logMetacat.info("in has sessionid "+ sess_id);
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if (sessionHash.containsKey(sess_id))
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{
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logMetacat.info("find the id " + sess_id + " in hash table");
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sess = (HttpSession) sessionHash.get(sess_id);
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}
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}
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username = (String) sess.getAttribute("username");
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logMetacat.warn("The user name from session is: "+ username);
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groupnames = (String[]) sess.getAttribute("groupnames");
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if (!MetaCatUtil.isAdministrator(username, groupnames))
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{
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PrintWriter out = response.getWriter();
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out.print("<error>");
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out.print("The user \"" + username +
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"\" is not authorized for this action.");
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out.print("</error>");
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out.close();
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logMetacat.warn("The user \"" + username +
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"\" is not authorized for this action: " +action);
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replErrorLog("The user \"" + username +
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"\" is not authorized for this action: " +action);
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return;
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}
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}// this is final else
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} catch (Exception e) {
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System.out.println("Error in MetacatReplication.handleGetOrPost: " +
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e.getMessage() );
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return;
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}
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if ( action.equals("readdata") )
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{
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OutputStream outStream = response.getOutputStream();
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//to get the data file.
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handleGetDataFileRequest(outStream, params, response);
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outStream.close();
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}
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else if ( action.equals("forcereplicatedatafile") )
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{
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//read a specific docid from remote host, and store it into local host
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handleForceReplicateDataFileRequest(params);
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}
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else
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{
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PrintWriter out = response.getWriter();
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if ( action.equals("stop") ) {
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//stop the replication server
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replicationDaemon.cancel();
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replicationDaemon = new Timer(true);
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timedReplicationIsOn = false;
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MetaCatUtil.setOption(TIMEREPLICATION, (new Boolean(timedReplicationIsOn)).toString());
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out.println("Replication Handler Stopped");
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MetacatReplication.replLog("deltaT handler stopped");
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} else if ( action.equals("start") ) {
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String firstTimeStr = "";
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//start the replication server
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if ( params.containsKey("rate") ) {
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timeInterval = new Long(
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new String(((String[])params.get("rate"))[0])).longValue();
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if(timeInterval < TIMEINTERVALLIMIT) {
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out.println("Replication deltaT rate cannot be less than "+
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TIMEINTERVALLIMIT + " millisecs and system automatically setup the rate to "+TIMEINTERVALLIMIT);
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//deltaT<30 is a timing mess!
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timeInterval = TIMEINTERVALLIMIT;
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}
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} else {
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timeInterval = TIMEINTERVALLIMIT ;
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}
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logMetacat.info("New rate is: " + timeInterval + " mini seconds.");
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if ( params.containsKey("firsttime"))
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{
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firstTimeStr = ((String[])params.get("firsttime"))[0];
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try
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{
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firstTime = ReplicationHandler.combinateCurrentDateAndGivenTime(firstTimeStr);
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logMetacat.info("The first time setting is "+firstTime.toString());
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}
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catch (Exception e)
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{
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throw new ServletException(e.getMessage());
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}
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logMetacat.warn("After combine current time, the real first time is "
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+firstTime.toString()+" minisec");
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}
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else
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{
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MetacatReplication.replErrorLog("You should specify the first time " +
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"to start a time replication");
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logMetacat.warn("You should specify the first time " +
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"to start a time replication");
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return;
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}
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timedReplicationIsOn = true;
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// save settings to property file
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MetaCatUtil.setOption(TIMEREPLICATION, (new Boolean(timedReplicationIsOn)).toString());
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// note we couldn't use firstTime object because it has date info
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// we only need time info such as 10:00 PM
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MetaCatUtil.setOption(FIRSTTIME, firstTimeStr);
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MetaCatUtil.setOption(TIMEREPLICATIONINTERVAl, (new Long(timeInterval)).toString());
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replicationDaemon.cancel();
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replicationDaemon = new Timer(true);
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replicationDaemon.scheduleAtFixedRate(new ReplicationHandler(), firstTime,
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timeInterval);
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out.println("Replication Handler Started");
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MetacatReplication.replLog("deltaT handler started with rate=" +
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timeInterval + " milliseconds at " +firstTime.toString());
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} else if ( action.equals("getall") ) {
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//updates this server exactly once
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replicationDaemon.schedule(new ReplicationHandler(), 0);
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response.setContentType("text/html");
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out.println("<html><body>\"Get All\" Done</body></html>");
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300
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} else if ( action.equals("forcereplicate") ) {
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//read a specific docid from remote host, and store it into local host
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handleForceReplicateRequest(out, params, response);
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304
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305
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} else if ( action.equals(FORCEREPLICATEDELETE) ) {
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//read a specific docid from remote host, and store it into local host
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handleForceReplicateDeleteRequest(out, params, response);
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308
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309
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} else if ( action.equals("update") ) {
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310
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//request an update list from the server
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handleUpdateRequest(out, params, response);
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312
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313
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} else if ( action.equals("read") ) {
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314
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//request a specific document from the server
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315
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//note that this could be replaced by a call to metacatServlet
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316
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//handleGetDocumentAction().
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317
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handleGetDocumentRequest(out, params, response);
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318
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} else if ( action.equals("getlock") ) {
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319
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handleGetLockRequest(out, params, response);
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320
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321
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} else if ( action.equals("getdocumentinfo") ) {
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322
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handleGetDocumentInfoRequest(out, params, response);
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323
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324
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} else if ( action.equals("gettime") ) {
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handleGetTimeRequest(out, params, response);
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326
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327
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} else if ( action.equals("getcatalog") ) {
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handleGetCatalogRequest(out, params, response, true);
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329
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330
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} else if ( action.equals("servercontrol") ) {
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331
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handleServerControlRequest(out, params, response);
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332
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} else if ( action.equals("test") ) {
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response.setContentType("text/html");
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out.println("<html><body>Test successfully</body></html>");
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335
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}
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336
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337
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out.close();
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338
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}//else
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339
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}
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340
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341
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/**
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342
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* This method can add, delete and list the servers currently included in
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343
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* xml_replication.
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344
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* action subaction other needed params
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345
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* ---------------------------------------------------------
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346
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* servercontrol add server
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347
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* servercontrol delete server
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348
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* servercontrol list
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349
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*/
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|
350
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private void handleServerControlRequest(PrintWriter out, Hashtable params,
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351
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HttpServletResponse response)
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352
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{
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353
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String subaction = ((String[])params.get("subaction"))[0];
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354
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DBConnection dbConn = null;
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355
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int serialNumber = -1;
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356
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PreparedStatement pstmt = null;
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357
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String replicate =null;
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358
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String server = null;
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359
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String dataReplicate = null;
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360
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String hub = null;
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361
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try {
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362
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//conn = util.openDBConnection();
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363
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dbConn=DBConnectionPool.
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364
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getDBConnection("MetacatReplication.handleServerControlRequest");
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365
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serialNumber=dbConn.getCheckOutSerialNumber();
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366
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367
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// add server to server list
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368
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if ( subaction.equals("add") ) {
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369
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replicate = ((String[])params.get("replicate"))[0];
|
|
370
|
server = ((String[])params.get("server"))[0];
|
|
371
|
|
|
372
|
//Get data replication value
|
|
373
|
dataReplicate = ((String[])params.get("datareplicate"))[0];
|
|
374
|
//Get hub value
|
|
375
|
hub = ((String[])params.get("hub"))[0];
|
|
376
|
|
|
377
|
/*pstmt = dbConn.prepareStatement("INSERT INTO xml_replication " +
|
|
378
|
"(server, last_checked, replicate, datareplicate, hub) " +
|
|
379
|
"VALUES ('" + server + "', to_date(" +
|
|
380
|
"'01/01/00', 'MM/DD/YY'), '" +
|
|
381
|
replicate +"', '" +dataReplicate+"', '"
|
|
382
|
+ hub +"')");*/
|
|
383
|
pstmt = dbConn.prepareStatement("INSERT INTO xml_replication " +
|
|
384
|
"(server, last_checked, replicate, datareplicate, hub) " +
|
|
385
|
"VALUES ('" + server + "', "+
|
|
386
|
dbAdapter.toDate("01/01/1980", "MM/DD/YYYY")
|
|
387
|
+ ", '" +
|
|
388
|
replicate +"', '" +dataReplicate+"', '"
|
|
389
|
+ hub +"')");
|
|
390
|
|
|
391
|
pstmt.execute();
|
|
392
|
pstmt.close();
|
|
393
|
dbConn.commit();
|
|
394
|
out.println("Server " + server + " added");
|
|
395
|
response.setContentType("text/html");
|
|
396
|
out.println("<html><body><table border=\"1\">");
|
|
397
|
out.println("<tr><td><b>server</b></td><td><b>last_checked</b></td><td>");
|
|
398
|
out.println("<b>replicate</b></td>");
|
|
399
|
out.println("<td><b>datareplicate</b></td>");
|
|
400
|
out.println("<td><b>hub</b></td></tr>");
|
|
401
|
pstmt = dbConn.prepareStatement("SELECT * FROM xml_replication");
|
|
402
|
//increase dbconnection usage
|
|
403
|
dbConn.increaseUsageCount(1);
|
|
404
|
|
|
405
|
pstmt.execute();
|
|
406
|
ResultSet rs = pstmt.getResultSet();
|
|
407
|
boolean tablehasrows = rs.next();
|
|
408
|
while(tablehasrows) {
|
|
409
|
out.println("<tr><td>" + rs.getString(2) + "</td><td>");
|
|
410
|
out.println(rs.getString(3) + "</td><td>");
|
|
411
|
out.println(rs.getString(4) + "</td><td>");
|
|
412
|
out.println(rs.getString(5) + "</td><td>");
|
|
413
|
out.println(rs.getString(6) + "</td></tr>");
|
|
414
|
|
|
415
|
tablehasrows = rs.next();
|
|
416
|
}
|
|
417
|
out.println("</table></body></html>");
|
|
418
|
|
|
419
|
// download certificate with the public key on this server
|
|
420
|
// and import it as a trusted certificate
|
|
421
|
String certURL = ((String[])params.get("certificate"))[0];
|
|
422
|
downloadCertificate(certURL);
|
|
423
|
|
|
424
|
// delete server from server list
|
|
425
|
} else if ( subaction.equals("delete") ) {
|
|
426
|
server = ((String[])params.get("server"))[0];
|
|
427
|
pstmt = dbConn.prepareStatement("DELETE FROM xml_replication " +
|
|
428
|
"WHERE server LIKE '" + server + "'");
|
|
429
|
pstmt.execute();
|
|
430
|
pstmt.close();
|
|
431
|
dbConn.commit();
|
|
432
|
out.println("Server " + server + " deleted");
|
|
433
|
response.setContentType("text/html");
|
|
434
|
out.println("<html><body><table border=\"1\">");
|
|
435
|
out.println("<tr><td><b>server</b></td><td><b>last_checked</b></td><td>");
|
|
436
|
out.println("<b>replicate</b></td>");
|
|
437
|
out.println("<td><b>datareplicate</b></td>");
|
|
438
|
out.println("<td><b>hub</b></td></tr>");
|
|
439
|
|
|
440
|
pstmt = dbConn.prepareStatement("SELECT * FROM xml_replication");
|
|
441
|
//increase dbconnection usage
|
|
442
|
dbConn.increaseUsageCount(1);
|
|
443
|
pstmt.execute();
|
|
444
|
ResultSet rs = pstmt.getResultSet();
|
|
445
|
boolean tablehasrows = rs.next();
|
|
446
|
while(tablehasrows)
|
|
447
|
{
|
|
448
|
out.println("<tr><td>" + rs.getString(2) + "</td><td>");
|
|
449
|
out.println(rs.getString(3) + "</td><td>");
|
|
450
|
out.println(rs.getString(4) + "</td><td>");
|
|
451
|
out.println(rs.getString(5) + "</td><td>");
|
|
452
|
out.println(rs.getString(6) + "</td></tr>");
|
|
453
|
tablehasrows = rs.next();
|
|
454
|
}
|
|
455
|
out.println("</table></body></html>");
|
|
456
|
|
|
457
|
// list servers in server list
|
|
458
|
} else if ( subaction.equals("list") ) {
|
|
459
|
response.setContentType("text/html");
|
|
460
|
out.println("<html><body><table border=\"1\">");
|
|
461
|
out.println("<tr><td><b>server</b></td><td><b>last_checked</b></td><td>");
|
|
462
|
out.println("<b>replicate</b></td>");
|
|
463
|
out.println("<td><b>datareplicate</b></td>");
|
|
464
|
out.println("<td><b>hub</b></td></tr>");
|
|
465
|
pstmt = dbConn.prepareStatement("SELECT * FROM xml_replication");
|
|
466
|
pstmt.execute();
|
|
467
|
ResultSet rs = pstmt.getResultSet();
|
|
468
|
boolean tablehasrows = rs.next();
|
|
469
|
while(tablehasrows) {
|
|
470
|
out.println("<tr><td>" + rs.getString(2) + "</td><td>");
|
|
471
|
out.println(rs.getString(3) + "</td><td>");
|
|
472
|
out.println(rs.getString(4) + "</td><td>");
|
|
473
|
out.println(rs.getString(5) + "</td><td>");
|
|
474
|
out.println(rs.getString(6) + "</td></tr>");
|
|
475
|
tablehasrows = rs.next();
|
|
476
|
}
|
|
477
|
out.println("</table></body></html>");
|
|
478
|
}
|
|
479
|
else
|
|
480
|
{
|
|
481
|
|
|
482
|
out.println("<error>Unkonwn subaction</error>");
|
|
483
|
|
|
484
|
}
|
|
485
|
pstmt.close();
|
|
486
|
//conn.close();
|
|
487
|
|
|
488
|
} catch(Exception e) {
|
|
489
|
System.out.println("Error in " +
|
|
490
|
"MetacatReplication.handleServerControlRequest " +
|
|
491
|
e.getMessage());
|
|
492
|
e.printStackTrace(System.out);
|
|
493
|
}
|
|
494
|
finally
|
|
495
|
{
|
|
496
|
try
|
|
497
|
{
|
|
498
|
pstmt.close();
|
|
499
|
}//try
|
|
500
|
catch (SQLException ee)
|
|
501
|
{
|
|
502
|
logMetacat.error("Error in " +
|
|
503
|
"MetacatReplication.handleServerControlRequest to close pstmt "
|
|
504
|
+ ee.getMessage());
|
|
505
|
}//catch
|
|
506
|
finally
|
|
507
|
{
|
|
508
|
DBConnectionPool.returnDBConnection(dbConn, serialNumber);
|
|
509
|
}//finally
|
|
510
|
}//finally
|
|
511
|
|
|
512
|
}
|
|
513
|
|
|
514
|
// download certificate with the public key from certURL and
|
|
515
|
// upload it onto this server; it then must be imported as a
|
|
516
|
// trusted certificate
|
|
517
|
private void downloadCertificate (String certURL)
|
|
518
|
throws FileNotFoundException, IOException, MalformedURLException
|
|
519
|
{
|
|
520
|
MetaCatUtil util = new MetaCatUtil();
|
|
521
|
String certPath = util.getOption("certPath"); //the path to be uploaded to
|
|
522
|
|
|
523
|
// get filename from the URL of the certificate
|
|
524
|
String filename = certURL;
|
|
525
|
int slash = Math.max(filename.lastIndexOf('/'), filename.lastIndexOf('\\'));
|
|
526
|
if ( slash > -1 ) {
|
|
527
|
filename = filename.substring(slash + 1);
|
|
528
|
}
|
|
529
|
|
|
530
|
// open file output strem to write the input into it
|
|
531
|
File f = new File(certPath, filename);
|
|
532
|
synchronized (f) {
|
|
533
|
try {
|
|
534
|
if ( f.exists() ) {
|
|
535
|
throw new IOException("File already exist: " + f.getCanonicalFile());
|
|
536
|
//if ( f.exists() && !f.canWrite() ) {
|
|
537
|
// throw new IOException("Not writable: " + f.getCanonicalFile());
|
|
538
|
}
|
|
539
|
} catch (SecurityException se) {
|
|
540
|
// if a security manager exists,
|
|
541
|
// its checkRead method is called for f.exist()
|
|
542
|
// or checkWrite method is called for f.canWrite()
|
|
543
|
throw se;
|
|
544
|
}
|
|
545
|
|
|
546
|
// create a buffered byte output stream
|
|
547
|
// that uses a default-sized output buffer
|
|
548
|
FileOutputStream fos = new FileOutputStream(f);
|
|
549
|
BufferedOutputStream out = new BufferedOutputStream(fos);
|
|
550
|
|
|
551
|
// this should be http url
|
|
552
|
URL url = new URL(certURL);
|
|
553
|
BufferedInputStream bis = null;
|
|
554
|
try {
|
|
555
|
bis = new BufferedInputStream(url.openStream());
|
|
556
|
byte[] buf = new byte[4 * 1024]; // 4K buffer
|
|
557
|
int b = bis.read(buf);
|
|
558
|
while (b != -1) {
|
|
559
|
out.write(buf, 0, b);
|
|
560
|
b = bis.read(buf);
|
|
561
|
}
|
|
562
|
} finally {
|
|
563
|
if (bis != null) bis.close();
|
|
564
|
}
|
|
565
|
// the input and the output streams must be closed
|
|
566
|
bis.close();
|
|
567
|
out.flush();
|
|
568
|
out.close();
|
|
569
|
fos.close();
|
|
570
|
} // end of synchronized(f)
|
|
571
|
}
|
|
572
|
|
|
573
|
/**
|
|
574
|
* when a forcereplication request comes in, local host sends a read request
|
|
575
|
* to the requesting server (remote server) for the specified docid.
|
|
576
|
* Then store it in local database.
|
|
577
|
*/
|
|
578
|
private void handleForceReplicateRequest(PrintWriter out, Hashtable params,
|
|
579
|
HttpServletResponse response)
|
|
580
|
{
|
|
581
|
String server = ((String[])params.get("server"))[0]; // the server that
|
|
582
|
String docid = ((String[])params.get("docid"))[0]; // sent the document
|
|
583
|
String dbaction = "UPDATE"; // the default action is UPDATE
|
|
584
|
boolean override = false;
|
|
585
|
int serverCode = 1;
|
|
586
|
DBConnection dbConn = null;
|
|
587
|
int serialNumber = -1;
|
|
588
|
|
|
589
|
try {
|
|
590
|
//if the url contains a dbaction then the default action is overridden
|
|
591
|
if(params.containsKey("dbaction")) {
|
|
592
|
dbaction = ((String[])params.get("dbaction"))[0];
|
|
593
|
//serverCode = MetacatReplication.getServerCode(server);
|
|
594
|
//override = true; //we are now overriding the default action
|
|
595
|
}
|
|
596
|
MetacatReplication.replLog("force replication request from " + server);
|
|
597
|
logMetacat.info("Force replication request from: "+ server);
|
|
598
|
logMetacat.info("Force replication docid: "+docid);
|
|
599
|
logMetacat.info("Force replication action: "+dbaction);
|
|
600
|
// sending back read request to remote server
|
|
601
|
URL u = new URL("https://" + server + "?server="
|
|
602
|
+util.getLocalReplicationServerName()
|
|
603
|
+"&action=read&docid=" + docid);
|
|
604
|
String xmldoc = MetacatReplication.getURLContent(u);
|
|
605
|
|
|
606
|
// get the document info from server
|
|
607
|
URL docinfourl = new URL("https://" + server +
|
|
608
|
"?server="+util.getLocalReplicationServerName()
|
|
609
|
+"&action=getdocumentinfo&docid=" + docid);
|
|
610
|
|
|
611
|
String docInfoStr = MetacatReplication.getURLContent(docinfourl);
|
|
612
|
|
|
613
|
//dih is the parser for the docinfo xml format
|
|
614
|
DocInfoHandler dih = new DocInfoHandler();
|
|
615
|
XMLReader docinfoParser = ReplicationHandler.initParser(dih);
|
|
616
|
docinfoParser.parse(new InputSource(new StringReader(docInfoStr)));
|
|
617
|
Hashtable docinfoHash = dih.getDocInfo();
|
|
618
|
|
|
619
|
// Get user owner of this docid
|
|
620
|
String user = (String)docinfoHash.get("user_owner");
|
|
621
|
// Get home server of this docid
|
|
622
|
String homeServer=(String)docinfoHash.get("home_server");
|
|
623
|
String createdDate = (String)docinfoHash.get("date_created");
|
|
624
|
String updatedDate = (String)docinfoHash.get("date_updated");
|
|
625
|
logMetacat.info("homeServer: "+homeServer);
|
|
626
|
// Get Document type
|
|
627
|
String docType = (String)docinfoHash.get("doctype");
|
|
628
|
logMetacat.info("docType: "+docType);
|
|
629
|
String parserBase = null;
|
|
630
|
// this for eml2 and we need user eml2 parser
|
|
631
|
if (docType != null &&
|
|
632
|
(docType.trim()).equals(DocumentImpl.EML2_0_0NAMESPACE))
|
|
633
|
{
|
|
634
|
logMetacat.warn("This is an eml200 document!");
|
|
635
|
parserBase = DocumentImpl.EML200;
|
|
636
|
}
|
|
637
|
else if (docType != null && (docType.trim()).equals(DocumentImpl.EML2_0_1NAMESPACE))
|
|
638
|
{
|
|
639
|
logMetacat.warn("This is an eml2.0.1 document!");
|
|
640
|
parserBase = DocumentImpl.EML200;
|
|
641
|
}
|
|
642
|
else if (docType != null && (docType.trim()).equals(DocumentImpl.EML2_1_0NAMESPACE))
|
|
643
|
{
|
|
644
|
logMetacat.warn("This is an eml2.1.0 document!");
|
|
645
|
parserBase = DocumentImpl.EML210;
|
|
646
|
}
|
|
647
|
logMetacat.warn("The parserBase is: "+parserBase);
|
|
648
|
|
|
649
|
// Get DBConnection from pool
|
|
650
|
dbConn=DBConnectionPool.
|
|
651
|
getDBConnection("MetacatReplication.handleForceReplicateRequest");
|
|
652
|
serialNumber=dbConn.getCheckOutSerialNumber();
|
|
653
|
// write the document to local database
|
|
654
|
DocumentImplWrapper wrapper = new DocumentImplWrapper(parserBase, false);
|
|
655
|
wrapper.writeReplication(dbConn, new StringReader(xmldoc), null, null,
|
|
656
|
dbaction, docid, user, null, homeServer,
|
|
657
|
server, createdDate, updatedDate);
|
|
658
|
|
|
659
|
MetacatReplication.replLog("document " + docid + " added to DB with " +
|
|
660
|
"action " + dbaction);
|
|
661
|
}//try
|
|
662
|
catch(Exception e)
|
|
663
|
{
|
|
664
|
MetacatReplication.replErrorLog("document " + docid +
|
|
665
|
" failed to added to DB with " +
|
|
666
|
"action " + dbaction + " because "+
|
|
667
|
e.getMessage());
|
|
668
|
logMetacat.error("ERROR in MetacatReplication.handleForceReplicate" +
|
|
669
|
"Request(): " + e.getMessage());
|
|
670
|
|
|
671
|
}//catch
|
|
672
|
finally
|
|
673
|
{
|
|
674
|
// Return the checked out DBConnection
|
|
675
|
DBConnectionPool.returnDBConnection(dbConn, serialNumber);
|
|
676
|
}//finally
|
|
677
|
}
|
|
678
|
|
|
679
|
/*
|
|
680
|
* when a forcereplication delete request comes in, local host will delete this
|
|
681
|
* document
|
|
682
|
*/
|
|
683
|
private void handleForceReplicateDeleteRequest(PrintWriter out, Hashtable params,
|
|
684
|
HttpServletResponse response)
|
|
685
|
{
|
|
686
|
String server = ((String[])params.get("server"))[0]; // the server that
|
|
687
|
String docid = ((String[])params.get("docid"))[0]; // sent the document
|
|
688
|
try
|
|
689
|
{
|
|
690
|
MetacatReplication.replLog("force replication delete request from " + server);
|
|
691
|
MetacatReplication.replLog("force replication delete docid " + docid);
|
|
692
|
logMetacat.info("Force replication delete request from: "+ server);
|
|
693
|
logMetacat.info("Force replication delete docid: "+docid);
|
|
694
|
DocumentImpl.delete(docid, null, null, server);
|
|
695
|
MetacatReplication.replLog("document " + docid + " was successfully deleted ");
|
|
696
|
logMetacat.info("document " + docid + " was successfully deleted ");
|
|
697
|
}
|
|
698
|
catch(Exception e)
|
|
699
|
{
|
|
700
|
MetacatReplication.replErrorLog("document " + docid +
|
|
701
|
" failed to delete because "+
|
|
702
|
e.getMessage());
|
|
703
|
logMetacat.error("ERROR in MetacatReplication.handleForceDeleteReplicate" +
|
|
704
|
"Request(): " + e.getMessage());
|
|
705
|
|
|
706
|
}//catch
|
|
707
|
|
|
708
|
}
|
|
709
|
|
|
710
|
|
|
711
|
/**
|
|
712
|
* when a forcereplication data file request comes in, local host sends a
|
|
713
|
* readdata request to the requesting server (remote server) for the specified
|
|
714
|
* docid. Then store it in local database and file system
|
|
715
|
*/
|
|
716
|
private void handleForceReplicateDataFileRequest(Hashtable params)
|
|
717
|
{
|
|
718
|
|
|
719
|
//make sure there is some parameters
|
|
720
|
if(params.isEmpty())
|
|
721
|
{
|
|
722
|
return;
|
|
723
|
}
|
|
724
|
// Get remote server
|
|
725
|
String server = ((String[])params.get("server"))[0];
|
|
726
|
// the docid should include rev number
|
|
727
|
String docid = ((String[])params.get("docid"))[0];
|
|
728
|
// Make sure there is a docid and server
|
|
729
|
if (docid==null || server==null || server.equals(""))
|
|
730
|
{
|
|
731
|
logMetacat.error("Didn't specify docid or server for replication");
|
|
732
|
return;
|
|
733
|
}
|
|
734
|
|
|
735
|
// Overide or not
|
|
736
|
boolean override = false;
|
|
737
|
// dbaction - update or insert
|
|
738
|
String dbaction=null;
|
|
739
|
|
|
740
|
try
|
|
741
|
{
|
|
742
|
//docid was switch to two parts uinque code and rev
|
|
743
|
//String uniqueCode=MetaCatUtil.getDocIdFromString(docid);
|
|
744
|
//int rev=MetaCatUtil.getVersionFromString(docid);
|
|
745
|
if(params.containsKey("dbaction"))
|
|
746
|
{
|
|
747
|
dbaction = ((String[])params.get("dbaction"))[0];
|
|
748
|
}
|
|
749
|
else//default value is update
|
|
750
|
{
|
|
751
|
dbaction = "update";
|
|
752
|
}
|
|
753
|
|
|
754
|
MetacatReplication.replLog("force replication request from " + server);
|
|
755
|
logMetacat.info("Force replication request from: "+ server);
|
|
756
|
logMetacat.info("Force replication docid: "+docid);
|
|
757
|
logMetacat.info("Force replication action: "+dbaction);
|
|
758
|
// get the document info from server
|
|
759
|
URL docinfourl = new URL("https://" + server +
|
|
760
|
"?server="+util.getLocalReplicationServerName()
|
|
761
|
+"&action=getdocumentinfo&docid=" + docid);
|
|
762
|
|
|
763
|
String docInfoStr = MetacatReplication.getURLContent(docinfourl);
|
|
764
|
|
|
765
|
//dih is the parser for the docinfo xml format
|
|
766
|
DocInfoHandler dih = new DocInfoHandler();
|
|
767
|
XMLReader docinfoParser = ReplicationHandler.initParser(dih);
|
|
768
|
docinfoParser.parse(new InputSource(new StringReader(docInfoStr)));
|
|
769
|
Hashtable docinfoHash = dih.getDocInfo();
|
|
770
|
String user = (String)docinfoHash.get("user_owner");
|
|
771
|
|
|
772
|
String docName = (String)docinfoHash.get("docname");
|
|
773
|
|
|
774
|
String docType = (String)docinfoHash.get("doctype");
|
|
775
|
|
|
776
|
String docHomeServer= (String)docinfoHash.get("home_server");
|
|
777
|
|
|
778
|
String createdDate = (String)docinfoHash.get("date_created");
|
|
779
|
|
|
780
|
String updatedDate = (String)docinfoHash.get("date_updated");
|
|
781
|
logMetacat.info("docHomeServer of datafile: "+docHomeServer);
|
|
782
|
|
|
783
|
|
|
784
|
|
|
785
|
//if action is delete, we don't delete the data file. Just archieve
|
|
786
|
//the xml_documents
|
|
787
|
/*if (dbaction.equals("delete"))
|
|
788
|
{
|
|
789
|
//conn = util.getConnection();
|
|
790
|
DocumentImpl.delete(docid,user,null);
|
|
791
|
//util.returnConnection(conn);
|
|
792
|
}*/
|
|
793
|
//To data file insert or update is same
|
|
794
|
if (dbaction.equals("insert")||dbaction.equals("update"))
|
|
795
|
{
|
|
796
|
//Get data file and store it into local file system.
|
|
797
|
// sending back readdata request to server
|
|
798
|
URL url = new URL("https://" + server + "?server="
|
|
799
|
+util.getLocalReplicationServerName()
|
|
800
|
+"&action=readdata&docid=" + docid);
|
|
801
|
String datafilePath = util.getOption("datafilepath");
|
|
802
|
//register data file into xml_documents table and wite data file
|
|
803
|
//into file system
|
|
804
|
DocumentImpl.writeDataFileInReplication(url.openStream(), datafilePath,
|
|
805
|
docName, docType, docid, user,docHomeServer,server,
|
|
806
|
DocumentImpl.DOCUMENTTABLE, false, createdDate, updatedDate);
|
|
807
|
//false means non-timed replication
|
|
808
|
}
|
|
809
|
|
|
810
|
|
|
811
|
|
|
812
|
MetacatReplication.replLog("datafile " + docid + " added to DB with " +
|
|
813
|
"action " + dbaction);
|
|
814
|
}
|
|
815
|
catch(Exception e)
|
|
816
|
{
|
|
817
|
|
|
818
|
MetacatReplication.replErrorLog("Datafile " + docid +
|
|
819
|
" failed to added to DB with " +
|
|
820
|
"action " + dbaction + " because "+
|
|
821
|
e.getMessage());
|
|
822
|
logMetacat.error
|
|
823
|
("ERROR in MetacatReplication.handleForceDataFileReplicate" +
|
|
824
|
"Request(): " + e.getMessage());
|
|
825
|
}
|
|
826
|
}
|
|
827
|
/**
|
|
828
|
* Grants or denies a lock to a requesting host.
|
|
829
|
* The servlet parameters of interrest are:
|
|
830
|
* docid: the docid of the file the lock is being requested for
|
|
831
|
* currentdate: the timestamp of the document on the remote server
|
|
832
|
*
|
|
833
|
*/
|
|
834
|
private void handleGetLockRequest(PrintWriter out, Hashtable params,
|
|
835
|
HttpServletResponse response)
|
|
836
|
{
|
|
837
|
|
|
838
|
try
|
|
839
|
{
|
|
840
|
|
|
841
|
String docid = ((String[])params.get("docid"))[0];
|
|
842
|
String remoteRev = ((String[])params.get("updaterev"))[0];
|
|
843
|
DocumentImpl requestDoc = new DocumentImpl(docid);
|
|
844
|
MetacatReplication.replLog("lock request for " + docid);
|
|
845
|
int localRevInt = requestDoc.getRev();
|
|
846
|
int remoteRevInt = Integer.parseInt(remoteRev);
|
|
847
|
|
|
848
|
if(remoteRevInt >= localRevInt)
|
|
849
|
{
|
|
850
|
if(!fileLocks.contains(docid))
|
|
851
|
{ //grant the lock if it is not already locked
|
|
852
|
fileLocks.add(0, docid); //insert at the beginning of the queue Vector
|
|
853
|
//send a message back to the the remote host authorizing the insert
|
|
854
|
out.println("<lockgranted><docid>" +docid+ "</docid></lockgranted>");
|
|
855
|
lockThread = new Thread(this);
|
|
856
|
lockThread.setPriority(Thread.MIN_PRIORITY);
|
|
857
|
lockThread.start();
|
|
858
|
MetacatReplication.replLog("lock granted for " + docid);
|
|
859
|
}
|
|
860
|
else
|
|
861
|
{ //deny the lock
|
|
862
|
out.println("<filelocked><docid>" + docid + "</docid></filelocked>");
|
|
863
|
MetacatReplication.replLog("lock denied for " + docid +
|
|
864
|
"reason: file already locked");
|
|
865
|
}
|
|
866
|
}
|
|
867
|
else
|
|
868
|
{//deny the lock.
|
|
869
|
out.println("<outdatedfile><docid>" + docid + "</docid></filelocked>");
|
|
870
|
MetacatReplication.replLog("lock denied for " + docid +
|
|
871
|
"reason: client has outdated file");
|
|
872
|
}
|
|
873
|
//conn.close();
|
|
874
|
}
|
|
875
|
catch(Exception e)
|
|
876
|
{
|
|
877
|
System.out.println("error requesting file lock from MetacatReplication." +
|
|
878
|
"handleGetLockRequest: " + e.getMessage());
|
|
879
|
e.printStackTrace(System.out);
|
|
880
|
}
|
|
881
|
}
|
|
882
|
|
|
883
|
/**
|
|
884
|
* Sends all of the xml_documents information encoded in xml to a requestor
|
|
885
|
* the format is:
|
|
886
|
* <!ELEMENT documentinfo (docid, docname, doctype, doctitle, user_owner,
|
|
887
|
* user_updated, home_server, public_access, rev)/>
|
|
888
|
* all of the subelements of document info are #PCDATA
|
|
889
|
*/
|
|
890
|
private void handleGetDocumentInfoRequest(PrintWriter out, Hashtable params,
|
|
891
|
HttpServletResponse response)
|
|
892
|
{
|
|
893
|
String docid = ((String[])(params.get("docid")))[0];
|
|
894
|
StringBuffer sb = new StringBuffer();
|
|
895
|
|
|
896
|
try
|
|
897
|
{
|
|
898
|
|
|
899
|
DocumentImpl doc = new DocumentImpl(docid);
|
|
900
|
sb.append("<documentinfo><docid>").append(docid);
|
|
901
|
sb.append("</docid><docname>").append(doc.getDocname());
|
|
902
|
sb.append("</docname><doctype>").append(doc.getDoctype());
|
|
903
|
sb.append("</doctype>");
|
|
904
|
sb.append("<user_owner>").append(doc.getUserowner());
|
|
905
|
sb.append("</user_owner><user_updated>").append(doc.getUserupdated());
|
|
906
|
sb.append("</user_updated>");
|
|
907
|
sb.append("<date_created>");
|
|
908
|
sb.append(doc.getCreateDate());
|
|
909
|
sb.append("</date_created>");
|
|
910
|
sb.append("<date_updated>");
|
|
911
|
sb.append(doc.getUpdateDate());
|
|
912
|
sb.append("</date_updated>");
|
|
913
|
sb.append("<home_server>");
|
|
914
|
sb.append(doc.getDocHomeServer());
|
|
915
|
sb.append("</home_server>");
|
|
916
|
sb.append("<public_access>").append(doc.getPublicaccess());
|
|
917
|
sb.append("</public_access><rev>").append(doc.getRev());
|
|
918
|
sb.append("</rev></documentinfo>");
|
|
919
|
response.setContentType("text/xml");
|
|
920
|
out.println(sb.toString());
|
|
921
|
|
|
922
|
}
|
|
923
|
catch (Exception e)
|
|
924
|
{
|
|
925
|
System.out.println("error in " +
|
|
926
|
"metacatReplication.handlegetdocumentinforequest: " +
|
|
927
|
e.getMessage());
|
|
928
|
}
|
|
929
|
|
|
930
|
}
|
|
931
|
|
|
932
|
/**
|
|
933
|
* Sends a datafile to a remote host
|
|
934
|
*/
|
|
935
|
private void handleGetDataFileRequest(OutputStream outPut,
|
|
936
|
Hashtable params, HttpServletResponse response)
|
|
937
|
|
|
938
|
{
|
|
939
|
// File path for data file
|
|
940
|
String filepath = util.getOption("datafilepath");
|
|
941
|
// Request docid
|
|
942
|
String docId = ((String[])(params.get("docid")))[0];
|
|
943
|
//check if the doicd is null
|
|
944
|
if (docId==null)
|
|
945
|
{
|
|
946
|
logMetacat.error("Didn't specify docid for replication");
|
|
947
|
return;
|
|
948
|
}
|
|
949
|
|
|
950
|
//try to open a https stream to test if the request server's public key
|
|
951
|
//in the key store, this is security issue
|
|
952
|
try
|
|
953
|
{
|
|
954
|
String server = ((String[])params.get("server"))[0];
|
|
955
|
URL u = new URL("https://" + server + "?server="
|
|
956
|
+util.getLocalReplicationServerName()
|
|
957
|
+"&action=test");
|
|
958
|
String test = MetacatReplication.getURLContent(u);
|
|
959
|
//couldn't pass the test
|
|
960
|
if (test.indexOf("successfully")==-1)
|
|
961
|
{
|
|
962
|
//response.setContentType("text/xml");
|
|
963
|
//outPut.println("<error>Couldn't pass the trust test</error>");
|
|
964
|
logMetacat.error("Couldn't pass the trust test");
|
|
965
|
return;
|
|
966
|
}
|
|
967
|
}//try
|
|
968
|
catch (Exception ee)
|
|
969
|
{
|
|
970
|
return;
|
|
971
|
}//catch
|
|
972
|
|
|
973
|
if(!filepath.endsWith("/"))
|
|
974
|
{
|
|
975
|
filepath += "/";
|
|
976
|
}
|
|
977
|
// Get file aboslute file name
|
|
978
|
String filename = filepath + docId;
|
|
979
|
|
|
980
|
//MIME type
|
|
981
|
String contentType = null;
|
|
982
|
if (filename.endsWith(".xml"))
|
|
983
|
{
|
|
984
|
contentType="text/xml";
|
|
985
|
}
|
|
986
|
else if (filename.endsWith(".css"))
|
|
987
|
{
|
|
988
|
contentType="text/css";
|
|
989
|
}
|
|
990
|
else if (filename.endsWith(".dtd"))
|
|
991
|
{
|
|
992
|
contentType="text/plain";
|
|
993
|
}
|
|
994
|
else if (filename.endsWith(".xsd"))
|
|
995
|
{
|
|
996
|
contentType="text/xml";
|
|
997
|
}
|
|
998
|
else if (filename.endsWith("/"))
|
|
999
|
{
|
|
1000
|
contentType="text/html";
|
|
1001
|
}
|
|
1002
|
else
|
|
1003
|
{
|
|
1004
|
File f = new File(filename);
|
|
1005
|
if ( f.isDirectory() )
|
|
1006
|
{
|
|
1007
|
contentType="text/html";
|
|
1008
|
}
|
|
1009
|
else
|
|
1010
|
{
|
|
1011
|
contentType="application/octet-stream";
|
|
1012
|
}
|
|
1013
|
}
|
|
1014
|
|
|
1015
|
// Set the mime type
|
|
1016
|
response.setContentType(contentType);
|
|
1017
|
|
|
1018
|
// Get the content of the file
|
|
1019
|
FileInputStream fin = null;
|
|
1020
|
try
|
|
1021
|
{
|
|
1022
|
// FileInputStream to metacat
|
|
1023
|
fin = new FileInputStream(filename);
|
|
1024
|
// 4K buffer
|
|
1025
|
byte[] buf = new byte[4 * 1024];
|
|
1026
|
// Read data from file input stream to byte array
|
|
1027
|
int b = fin.read(buf);
|
|
1028
|
// Write to outStream from byte array
|
|
1029
|
while (b != -1)
|
|
1030
|
{
|
|
1031
|
outPut.write(buf, 0, b);
|
|
1032
|
b = fin.read(buf);
|
|
1033
|
}
|
|
1034
|
// close file input stream
|
|
1035
|
fin.close();
|
|
1036
|
|
|
1037
|
}//try
|
|
1038
|
catch(Exception e)
|
|
1039
|
{
|
|
1040
|
System.out.println("error getting data file from MetacatReplication." +
|
|
1041
|
"handlGetDataFileRequest " + e.getMessage());
|
|
1042
|
e.printStackTrace(System.out);
|
|
1043
|
}//catch
|
|
1044
|
|
|
1045
|
}
|
|
1046
|
|
|
1047
|
|
|
1048
|
/**
|
|
1049
|
* Sends a document to a remote host
|
|
1050
|
*/
|
|
1051
|
private void handleGetDocumentRequest(PrintWriter out, Hashtable params,
|
|
1052
|
HttpServletResponse response)
|
|
1053
|
{
|
|
1054
|
|
|
1055
|
try
|
|
1056
|
{
|
|
1057
|
//try to open a https stream to test if the request server's public key
|
|
1058
|
//in the key store, this is security issue
|
|
1059
|
String server = ((String[])params.get("server"))[0];
|
|
1060
|
URL u = new URL("https://" + server + "?server="
|
|
1061
|
+util.getLocalReplicationServerName()
|
|
1062
|
+"&action=test");
|
|
1063
|
String test = MetacatReplication.getURLContent(u);
|
|
1064
|
//couldn't pass the test
|
|
1065
|
if (test.indexOf("successfully")==-1)
|
|
1066
|
{
|
|
1067
|
response.setContentType("text/xml");
|
|
1068
|
out.println("<error>Couldn't pass the trust test "+test+" </error>");
|
|
1069
|
out.close();
|
|
1070
|
return;
|
|
1071
|
}
|
|
1072
|
|
|
1073
|
String docid = ((String[])(params.get("docid")))[0];
|
|
1074
|
|
|
1075
|
DocumentImpl di = new DocumentImpl(docid);
|
|
1076
|
response.setContentType("text/xml");
|
|
1077
|
out.print(di.toString(null, null, true));
|
|
1078
|
|
|
1079
|
MetacatReplication.replLog("document " + docid + " sent");
|
|
1080
|
|
|
1081
|
}
|
|
1082
|
catch(Exception e)
|
|
1083
|
{
|
|
1084
|
logMetacat.error("error getting document from MetacatReplication."
|
|
1085
|
+"handlGetDocumentRequest " + e.getMessage());
|
|
1086
|
//e.printStackTrace(System.out);
|
|
1087
|
response.setContentType("text/xml");
|
|
1088
|
out.println("<error>"+e.getMessage()+"</error>");
|
|
1089
|
}
|
|
1090
|
|
|
1091
|
}
|
|
1092
|
|
|
1093
|
/**
|
|
1094
|
* Sends a list of all of the documents on this sever along with their
|
|
1095
|
* revision numbers.
|
|
1096
|
* The format is:
|
|
1097
|
* <!ELEMENT replication (server, updates)>
|
|
1098
|
* <!ELEMENT server (#PCDATA)>
|
|
1099
|
* <!ELEMENT updates ((updatedDocument | deleteDocument | revisionDocument)*)>
|
|
1100
|
* <!ELEMENT updatedDocument (docid, rev, datafile*)>
|
|
1101
|
* <!ELEMENT deletedDocument (docid, rev)>
|
|
1102
|
* <!ELEMENT revisionDocument (docid, rev, datafile*)>
|
|
1103
|
* <!ELEMENT docid (#PCDATA)>
|
|
1104
|
* <!ELEMENT rev (#PCDATA)>
|
|
1105
|
* <!ELEMENT datafile (#PCDATA)>
|
|
1106
|
* note that the rev in deletedDocument is always empty. I just left
|
|
1107
|
* it in there to make the parser implementation easier.
|
|
1108
|
*/
|
|
1109
|
private void handleUpdateRequest(PrintWriter out, Hashtable params,
|
|
1110
|
HttpServletResponse response)
|
|
1111
|
{
|
|
1112
|
// Checked out DBConnection
|
|
1113
|
DBConnection dbConn = null;
|
|
1114
|
// DBConenction serial number when checked it out
|
|
1115
|
int serialNumber = -1;
|
|
1116
|
PreparedStatement pstmt = null;
|
|
1117
|
// Server list to store server info of xml_replication table
|
|
1118
|
ReplicationServerList serverList = null;
|
|
1119
|
|
|
1120
|
try
|
|
1121
|
{
|
|
1122
|
// Check out a DBConnection from pool
|
|
1123
|
dbConn=DBConnectionPool.
|
|
1124
|
getDBConnection("MetacatReplication.handleUpdateRequest");
|
|
1125
|
serialNumber=dbConn.getCheckOutSerialNumber();
|
|
1126
|
// Create a server list from xml_replication table
|
|
1127
|
serverList = new ReplicationServerList();
|
|
1128
|
|
|
1129
|
// Get remote server name from param
|
|
1130
|
String server = ((String[])params.get("server"))[0];
|
|
1131
|
// If no servr name in param, return a error
|
|
1132
|
if ( server == null || server.equals(""))
|
|
1133
|
{
|
|
1134
|
response.setContentType("text/xml");
|
|
1135
|
out.println("<error>Request didn't specify server name</error>");
|
|
1136
|
out.close();
|
|
1137
|
return;
|
|
1138
|
}//if
|
|
1139
|
|
|
1140
|
//try to open a https stream to test if the request server's public key
|
|
1141
|
//in the key store, this is security issue
|
|
1142
|
URL u = new URL("https://" + server + "?server="
|
|
1143
|
+util.getLocalReplicationServerName()
|
|
1144
|
+"&action=test");
|
|
1145
|
String test = MetacatReplication.getURLContent(u);
|
|
1146
|
//couldn't pass the test
|
|
1147
|
if (test.indexOf("successfully")==-1)
|
|
1148
|
{
|
|
1149
|
response.setContentType("text/xml");
|
|
1150
|
out.println("<error>Couldn't pass the trust test</error>");
|
|
1151
|
out.close();
|
|
1152
|
return;
|
|
1153
|
}
|
|
1154
|
|
|
1155
|
|
|
1156
|
// Check if local host configure to replicate xml documents to remote
|
|
1157
|
// server. If not send back a error message
|
|
1158
|
if (!serverList.getReplicationValue(server))
|
|
1159
|
{
|
|
1160
|
response.setContentType("text/xml");
|
|
1161
|
out.println
|
|
1162
|
("<error>Configuration not allow to replicate document to you</error>");
|
|
1163
|
out.close();
|
|
1164
|
return;
|
|
1165
|
}//if
|
|
1166
|
|
|
1167
|
// Store the sql command
|
|
1168
|
StringBuffer docsql = new StringBuffer();
|
|
1169
|
StringBuffer revisionSql = new StringBuffer();
|
|
1170
|
// Stroe the docid list
|
|
1171
|
StringBuffer doclist = new StringBuffer();
|
|
1172
|
// Store the deleted docid list
|
|
1173
|
StringBuffer delsql = new StringBuffer();
|
|
1174
|
// Store the data set file
|
|
1175
|
Vector packageFiles = new Vector();
|
|
1176
|
|
|
1177
|
// Append local server's name and replication servlet to doclist
|
|
1178
|
doclist.append("<?xml version=\"1.0\"?><replication>");
|
|
1179
|
doclist.append("<server>").append(util.getLocalReplicationServerName());
|
|
1180
|
//doclist.append(util.getOption("replicationpath"));
|
|
1181
|
doclist.append("</server><updates>");
|
|
1182
|
|
|
1183
|
// Get correct docid that reside on this server according the requesting
|
|
1184
|
// server's replicate and data replicate value in xml_replication table
|
|
1185
|
docsql.append(dbAdapter.getReplicationDocumentListSQL());
|
|
1186
|
//docsql.append("select docid, rev, doctype from xml_documents where (docid not in (select a.docid from xml_documents a, xml_revisions b where a.docid=b.docid and a.rev<=b.rev)) ");
|
|
1187
|
revisionSql.append("select docid, rev, doctype from xml_revisions ");
|
|
1188
|
// If the localhost is not a hub to the remote server, only replicate
|
|
1189
|
// the docid' which home server is local host (server_location =1)
|
|
1190
|
if (!serverList.getHubValue(server))
|
|
1191
|
{
|
|
1192
|
String serverLocationDoc = " and a.server_location = 1";
|
|
1193
|
String serverLocationRev = "where server_location = 1";
|
|
1194
|
docsql.append(serverLocationDoc);
|
|
1195
|
revisionSql.append(serverLocationRev);
|
|
1196
|
}
|
|
1197
|
logMetacat.info("Doc sql: "+docsql.toString());
|
|
1198
|
|
|
1199
|
// Get any deleted documents
|
|
1200
|
delsql.append("select distinct docid from ");
|
|
1201
|
delsql.append("xml_revisions where docid not in (select docid from ");
|
|
1202
|
delsql.append("xml_documents) ");
|
|
1203
|
// If the localhost is not a hub to the remote server, only replicate
|
|
1204
|
// the docid' which home server is local host (server_location =1)
|
|
1205
|
if (!serverList.getHubValue(server))
|
|
1206
|
{
|
|
1207
|
delsql.append("and server_location = 1");
|
|
1208
|
}
|
|
1209
|
logMetacat.info("Deleted sql: "+delsql.toString());
|
|
1210
|
|
|
1211
|
|
|
1212
|
|
|
1213
|
// Get docid list of local host
|
|
1214
|
pstmt = dbConn.prepareStatement(docsql.toString());
|
|
1215
|
pstmt.execute();
|
|
1216
|
ResultSet rs = pstmt.getResultSet();
|
|
1217
|
boolean tablehasrows = rs.next();
|
|
1218
|
//If metacat configed to replicate data file
|
|
1219
|
//if ((util.getOption("replicationsenddata")).equals("on"))
|
|
1220
|
boolean replicateData = serverList.getDataReplicationValue(server);
|
|
1221
|
if (replicateData)
|
|
1222
|
{
|
|
1223
|
while(tablehasrows)
|
|
1224
|
{
|
|
1225
|
String recordDoctype = rs.getString(3);
|
|
1226
|
Vector packagedoctypes = MetaCatUtil.getOptionList(
|
|
1227
|
MetaCatUtil.getOption("packagedoctype"));
|
|
1228
|
//if this is a package file, put it at the end
|
|
1229
|
//because if a package file is read before all of the files it
|
|
1230
|
//refers to are loaded then there is an error
|
|
1231
|
if(recordDoctype != null && !packagedoctypes.contains(recordDoctype))
|
|
1232
|
{
|
|
1233
|
//If this is not data file
|
|
1234
|
if (!recordDoctype.equals("BIN"))
|
|
1235
|
{
|
|
1236
|
//for non-data file document
|
|
1237
|
doclist.append("<updatedDocument>");
|
|
1238
|
doclist.append("<docid>").append(rs.getString(1));
|
|
1239
|
doclist.append("</docid><rev>").append(rs.getInt(2));
|
|
1240
|
doclist.append("</rev>");
|
|
1241
|
doclist.append("</updatedDocument>");
|
|
1242
|
}//if
|
|
1243
|
else
|
|
1244
|
{
|
|
1245
|
//for data file document, in datafile attributes
|
|
1246
|
//we put "datafile" value there
|
|
1247
|
doclist.append("<updatedDocument>");
|
|
1248
|
doclist.append("<docid>").append(rs.getString(1));
|
|
1249
|
doclist.append("</docid><rev>").append(rs.getInt(2));
|
|
1250
|
doclist.append("</rev>");
|
|
1251
|
doclist.append("<datafile>");
|
|
1252
|
doclist.append(MetaCatUtil.getOption("datafileflag"));
|
|
1253
|
doclist.append("</datafile>");
|
|
1254
|
doclist.append("</updatedDocument>");
|
|
1255
|
}//else
|
|
1256
|
}//if packagedoctpes
|
|
1257
|
else
|
|
1258
|
{ //the package files are saved to be put into the xml later.
|
|
1259
|
Vector v = new Vector();
|
|
1260
|
v.add(new String(rs.getString(1)));
|
|
1261
|
v.add(new Integer(rs.getInt(2)));
|
|
1262
|
packageFiles.add(new Vector(v));
|
|
1263
|
}//esle
|
|
1264
|
tablehasrows = rs.next();
|
|
1265
|
}//while
|
|
1266
|
}//if
|
|
1267
|
else //metacat was configured not to send data file
|
|
1268
|
{
|
|
1269
|
while(tablehasrows)
|
|
1270
|
{
|
|
1271
|
String recordDoctype = rs.getString(3);
|
|
1272
|
if(!recordDoctype.equals("BIN"))
|
|
1273
|
{ //don't replicate data files
|
|
1274
|
Vector packagedoctypes = MetaCatUtil.getOptionList(
|
|
1275
|
MetaCatUtil.getOption("packagedoctype"));
|
|
1276
|
if(recordDoctype != null && !packagedoctypes.contains(recordDoctype))
|
|
1277
|
{ //if this is a package file, put it at the end
|
|
1278
|
//because if a package file is read before all of the files it
|
|
1279
|
//refers to are loaded then there is an error
|
|
1280
|
doclist.append("<updatedDocument>");
|
|
1281
|
doclist.append("<docid>").append(rs.getString(1));
|
|
1282
|
doclist.append("</docid><rev>").append(rs.getInt(2));
|
|
1283
|
doclist.append("</rev>");
|
|
1284
|
doclist.append("</updatedDocument>");
|
|
1285
|
}
|
|
1286
|
else
|
|
1287
|
{ //the package files are saved to be put into the xml later.
|
|
1288
|
Vector v = new Vector();
|
|
1289
|
v.add(new String(rs.getString(1)));
|
|
1290
|
v.add(new Integer(rs.getInt(2)));
|
|
1291
|
packageFiles.add(new Vector(v));
|
|
1292
|
}
|
|
1293
|
}//if
|
|
1294
|
tablehasrows = rs.next();
|
|
1295
|
}//while
|
|
1296
|
}//else
|
|
1297
|
|
|
1298
|
pstmt = dbConn.prepareStatement(delsql.toString());
|
|
1299
|
//usage count should increas 1
|
|
1300
|
dbConn.increaseUsageCount(1);
|
|
1301
|
|
|
1302
|
pstmt.execute();
|
|
1303
|
rs = pstmt.getResultSet();
|
|
1304
|
tablehasrows = rs.next();
|
|
1305
|
while(tablehasrows)
|
|
1306
|
{ //handle the deleted documents
|
|
1307
|
doclist.append("<deletedDocument><docid>").append(rs.getString(1));
|
|
1308
|
doclist.append("</docid><rev></rev></deletedDocument>");
|
|
1309
|
//note that rev is always empty for deleted docs
|
|
1310
|
tablehasrows = rs.next();
|
|
1311
|
}
|
|
1312
|
|
|
1313
|
//now we can put the package files into the xml results
|
|
1314
|
for(int i=0; i<packageFiles.size(); i++)
|
|
1315
|
{
|
|
1316
|
Vector v = (Vector)packageFiles.elementAt(i);
|
|
1317
|
doclist.append("<updatedDocument>");
|
|
1318
|
doclist.append("<docid>").append((String)v.elementAt(0));
|
|
1319
|
doclist.append("</docid><rev>");
|
|
1320
|
doclist.append(((Integer)v.elementAt(1)).intValue());
|
|
1321
|
doclist.append("</rev>");
|
|
1322
|
doclist.append("</updatedDocument>");
|
|
1323
|
}
|
|
1324
|
// add revision doc list
|
|
1325
|
doclist.append(prepareRevisionDoc(dbConn,revisionSql.toString(),replicateData));
|
|
1326
|
|
|
1327
|
doclist.append("</updates></replication>");
|
|
1328
|
logMetacat.info("doclist: " + doclist.toString());
|
|
1329
|
pstmt.close();
|
|
1330
|
//conn.close();
|
|
1331
|
response.setContentType("text/xml");
|
|
1332
|
out.println(doclist.toString());
|
|
1333
|
|
|
1334
|
}
|
|
1335
|
catch(Exception e)
|
|
1336
|
{
|
|
1337
|
logMetacat.error("error in MetacatReplication." +
|
|
1338
|
"handleupdaterequest: " + e.getMessage());
|
|
1339
|
//e.printStackTrace(System.out);
|
|
1340
|
response.setContentType("text/xml");
|
|
1341
|
out.println("<error>"+e.getMessage()+"</error>");
|
|
1342
|
}
|
|
1343
|
finally
|
|
1344
|
{
|
|
1345
|
try
|
|
1346
|
{
|
|
1347
|
pstmt.close();
|
|
1348
|
}//try
|
|
1349
|
catch (SQLException ee)
|
|
1350
|
{
|
|
1351
|
logMetacat.error("Error in MetacatReplication." +
|
|
1352
|
"handleUpdaterequest to close pstmt: "+ee.getMessage());
|
|
1353
|
}//catch
|
|
1354
|
finally
|
|
1355
|
{
|
|
1356
|
DBConnectionPool.returnDBConnection(dbConn, serialNumber);
|
|
1357
|
}//finally
|
|
1358
|
}//finally
|
|
1359
|
|
|
1360
|
}//handlUpdateRequest
|
|
1361
|
|
|
1362
|
/*
|
|
1363
|
* This method will get the xml string for document in xml_revision
|
|
1364
|
* The schema look like <!ELEMENT revisionDocument (docid, rev, datafile*)>
|
|
1365
|
*/
|
|
1366
|
private String prepareRevisionDoc(DBConnection dbConn, String revSql,
|
|
1367
|
boolean replicateData) throws Exception
|
|
1368
|
{
|
|
1369
|
logMetacat.warn("The revision document sql is "+ revSql);
|
|
1370
|
StringBuffer revDocList = new StringBuffer();
|
|
1371
|
PreparedStatement pstmt = dbConn.prepareStatement(revSql);
|
|
1372
|
//usage count should increas 1
|
|
1373
|
dbConn.increaseUsageCount(1);
|
|
1374
|
|
|
1375
|
pstmt.execute();
|
|
1376
|
ResultSet rs = pstmt.getResultSet();
|
|
1377
|
boolean tablehasrows = rs.next();
|
|
1378
|
while(tablehasrows)
|
|
1379
|
{
|
|
1380
|
String recordDoctype = rs.getString(3);
|
|
1381
|
|
|
1382
|
//If this is data file and it isn't configured to replicate data
|
|
1383
|
if (recordDoctype.equals("BIN") && !replicateData)
|
|
1384
|
{
|
|
1385
|
// do nothing
|
|
1386
|
continue;
|
|
1387
|
}
|
|
1388
|
else
|
|
1389
|
{
|
|
1390
|
|
|
1391
|
revDocList.append("<revisionDocument>");
|
|
1392
|
revDocList.append("<docid>").append(rs.getString(1));
|
|
1393
|
revDocList.append("</docid><rev>").append(rs.getInt(2));
|
|
1394
|
revDocList.append("</rev>");
|
|
1395
|
// data file
|
|
1396
|
if (recordDoctype.equals("BIN"))
|
|
1397
|
{
|
|
1398
|
revDocList.append("<datafile>");
|
|
1399
|
revDocList.append(MetaCatUtil.getOption("datafileflag"));
|
|
1400
|
revDocList.append("</datafile>");
|
|
1401
|
}
|
|
1402
|
revDocList.append("</revisionDocument>");
|
|
1403
|
|
|
1404
|
}//else
|
|
1405
|
tablehasrows = rs.next();
|
|
1406
|
}
|
|
1407
|
//System.out.println("The revision list is"+ revDocList.toString());
|
|
1408
|
return revDocList.toString();
|
|
1409
|
}
|
|
1410
|
|
|
1411
|
/**
|
|
1412
|
* Returns the xml_catalog table encoded in xml
|
|
1413
|
*/
|
|
1414
|
public static String getCatalogXML()
|
|
1415
|
{
|
|
1416
|
return handleGetCatalogRequest(null, null, null, false);
|
|
1417
|
}
|
|
1418
|
|
|
1419
|
/**
|
|
1420
|
* Sends the contents of the xml_catalog table encoded in xml
|
|
1421
|
* The xml format is:
|
|
1422
|
* <!ELEMENT xml_catalog (row*)>
|
|
1423
|
* <!ELEMENT row (entry_type, source_doctype, target_doctype, public_id,
|
|
1424
|
* system_id)>
|
|
1425
|
* All of the sub elements of row are #PCDATA
|
|
1426
|
|
|
1427
|
* If printFlag == false then do not print to out.
|
|
1428
|
*/
|
|
1429
|
private static String handleGetCatalogRequest(PrintWriter out,
|
|
1430
|
Hashtable params,
|
|
1431
|
HttpServletResponse response,
|
|
1432
|
boolean printFlag)
|
|
1433
|
{
|
|
1434
|
DBConnection dbConn = null;
|
|
1435
|
int serialNumber = -1;
|
|
1436
|
PreparedStatement pstmt = null;
|
|
1437
|
try
|
|
1438
|
{
|
|
1439
|
/*conn = MetacatReplication.getDBConnection("MetacatReplication." +
|
|
1440
|
"handleGetCatalogRequest");*/
|
|
1441
|
dbConn=DBConnectionPool.
|
|
1442
|
getDBConnection("MetacatReplication.handleGetCatalogRequest");
|
|
1443
|
serialNumber=dbConn.getCheckOutSerialNumber();
|
|
1444
|
pstmt = dbConn.prepareStatement("select entry_type, " +
|
|
1445
|
"source_doctype, target_doctype, public_id, " +
|
|
1446
|
"system_id from xml_catalog");
|
|
1447
|
pstmt.execute();
|
|
1448
|
ResultSet rs = pstmt.getResultSet();
|
|
1449
|
boolean tablehasrows = rs.next();
|
|
1450
|
StringBuffer sb = new StringBuffer();
|
|
1451
|
sb.append("<?xml version=\"1.0\"?><xml_catalog>");
|
|
1452
|
while(tablehasrows)
|
|
1453
|
{
|
|
1454
|
sb.append("<row><entry_type>").append(rs.getString(1));
|
|
1455
|
sb.append("</entry_type><source_doctype>").append(rs.getString(2));
|
|
1456
|
sb.append("</source_doctype><target_doctype>").append(rs.getString(3));
|
|
1457
|
sb.append("</target_doctype><public_id>").append(rs.getString(4));
|
|
1458
|
sb.append("</public_id><system_id>").append(rs.getString(5));
|
|
1459
|
sb.append("</system_id></row>");
|
|
1460
|
|
|
1461
|
tablehasrows = rs.next();
|
|
1462
|
}
|
|
1463
|
sb.append("</xml_catalog>");
|
|
1464
|
//conn.close();
|
|
1465
|
if(printFlag)
|
|
1466
|
{
|
|
1467
|
response.setContentType("text/xml");
|
|
1468
|
out.println(sb.toString());
|
|
1469
|
}
|
|
1470
|
pstmt.close();
|
|
1471
|
return sb.toString();
|
|
1472
|
}
|
|
1473
|
catch(Exception e)
|
|
1474
|
{
|
|
1475
|
|
|
1476
|
logMetacat.error("error in MetacatReplication.handleGetCatalogRequest:"+
|
|
1477
|
e.getMessage());
|
|
1478
|
e.printStackTrace(System.out);
|
|
1479
|
if(printFlag)
|
|
1480
|
{
|
|
1481
|
out.println("<error>"+e.getMessage()+"</error>");
|
|
1482
|
}
|
|
1483
|
}
|
|
1484
|
finally
|
|
1485
|
{
|
|
1486
|
try
|
|
1487
|
{
|
|
1488
|
pstmt.close();
|
|
1489
|
}//try
|
|
1490
|
catch (SQLException ee)
|
|
1491
|
{
|
|
1492
|
logMetacat.error("Error in MetacatReplication.handleGetCatalogRequest: "
|
|
1493
|
+ee.getMessage());
|
|
1494
|
}//catch
|
|
1495
|
finally
|
|
1496
|
{
|
|
1497
|
DBConnectionPool.returnDBConnection(dbConn, serialNumber);
|
|
1498
|
}//finally
|
|
1499
|
}//finally
|
|
1500
|
|
|
1501
|
return null;
|
|
1502
|
}
|
|
1503
|
|
|
1504
|
/**
|
|
1505
|
* Sends the current system date to the remote server. Using this action
|
|
1506
|
* for replication gets rid of any problems with syncronizing clocks
|
|
1507
|
* because a time specific to a document is always kept on its home server.
|
|
1508
|
*/
|
|
1509
|
private void handleGetTimeRequest(PrintWriter out, Hashtable params,
|
|
1510
|
HttpServletResponse response)
|
|
1511
|
{
|
|
1512
|
SimpleDateFormat formatter = new SimpleDateFormat ("MM/dd/yy HH:mm:ss");
|
|
1513
|
java.util.Date localtime = new java.util.Date();
|
|
1514
|
String dateString = formatter.format(localtime);
|
|
1515
|
response.setContentType("text/xml");
|
|
1516
|
|
|
1517
|
out.println("<timestamp>" + dateString + "</timestamp>");
|
|
1518
|
}
|
|
1519
|
|
|
1520
|
/**
|
|
1521
|
* this method handles the timeout for a file lock. when a lock is
|
|
1522
|
* granted it is granted for 30 seconds. When this thread runs out
|
|
1523
|
* it deletes the docid from the queue, thus eliminating the lock.
|
|
1524
|
*/
|
|
1525
|
public void run()
|
|
1526
|
{
|
|
1527
|
try
|
|
1528
|
{
|
|
1529
|
logMetacat.info("thread started for docid: " +
|
|
1530
|
(String)fileLocks.elementAt(0));
|
|
1531
|
|
|
1532
|
Thread.sleep(30000); //the lock will expire in 30 seconds
|
|
1533
|
logMetacat.info("thread for docid: " +
|
|
1534
|
(String)fileLocks.elementAt(fileLocks.size() - 1) +
|
|
1535
|
" exiting.");
|
|
1536
|
|
|
1537
|
fileLocks.remove(fileLocks.size() - 1);
|
|
1538
|
//fileLocks is treated as a FIFO queue. If there are more than one lock
|
|
1539
|
//in the vector, the first one inserted will be removed.
|
|
1540
|
}
|
|
1541
|
catch(Exception e)
|
|
1542
|
{
|
|
1543
|
logMetacat.error("error in file lock thread from " +
|
|
1544
|
"MetacatReplication.run: " + e.getMessage());
|
|
1545
|
}
|
|
1546
|
}
|
|
1547
|
|
|
1548
|
/**
|
|
1549
|
* Returns the name of a server given a serverCode
|
|
1550
|
* @param serverCode the serverid of the server
|
|
1551
|
* @return the servername or null if the specified serverCode does not
|
|
1552
|
* exist.
|
|
1553
|
*/
|
|
1554
|
public static String getServerNameForServerCode(int serverCode)
|
|
1555
|
{
|
|
1556
|
//System.out.println("serverid: " + serverCode);
|
|
1557
|
DBConnection dbConn = null;
|
|
1558
|
int serialNumber = -1;
|
|
1559
|
PreparedStatement pstmt = null;
|
|
1560
|
try
|
|
1561
|
{
|
|
1562
|
dbConn=DBConnectionPool.
|
|
1563
|
getDBConnection("MetacatReplication.getServer");
|
|
1564
|
serialNumber=dbConn.getCheckOutSerialNumber();
|
|
1565
|
String sql = new String("select server from " +
|
|
1566
|
"xml_replication where serverid = " +
|
|
1567
|
serverCode);
|
|
1568
|
pstmt = dbConn.prepareStatement(sql);
|
|
1569
|
//System.out.println("getserver sql: " + sql);
|
|
1570
|
pstmt.execute();
|
|
1571
|
ResultSet rs = pstmt.getResultSet();
|
|
1572
|
boolean tablehasrows = rs.next();
|
|
1573
|
if(tablehasrows)
|
|
1574
|
{
|
|
1575
|
//System.out.println("server: " + rs.getString(1));
|
|
1576
|
return rs.getString(1);
|
|
1577
|
}
|
|
1578
|
|
|
1579
|
//conn.close();
|
|
1580
|
}
|
|
1581
|
catch(Exception e)
|
|
1582
|
{
|
|
1583
|
System.out.println("Error in MetacatReplication.getServer: " +
|
|
1584
|
e.getMessage());
|
|
1585
|
}
|
|
1586
|
finally
|
|
1587
|
{
|
|
1588
|
try
|
|
1589
|
{
|
|
1590
|
pstmt.close();
|
|
1591
|
}//try
|
|
1592
|
catch (SQLException ee)
|
|
1593
|
{
|
|
1594
|
logMetacat.error("Error in MetacactReplication.getserver: "+
|
|
1595
|
ee.getMessage());
|
|
1596
|
}//catch
|
|
1597
|
finally
|
|
1598
|
{
|
|
1599
|
DBConnectionPool.returnDBConnection(dbConn, serialNumber);
|
|
1600
|
}//fianlly
|
|
1601
|
}//finally
|
|
1602
|
|
|
1603
|
|
|
1604
|
|
|
1605
|
return null;
|
|
1606
|
//return null if the server does not exist
|
|
1607
|
}
|
|
1608
|
|
|
1609
|
/**
|
|
1610
|
* Returns a server code given a server name
|
|
1611
|
* @param server the name of the server
|
|
1612
|
* @return integer > 0 representing the code of the server, 0 if the server
|
|
1613
|
* does not exist.
|
|
1614
|
*/
|
|
1615
|
public static int getServerCodeForServerName(String server) throws Exception
|
|
1616
|
{
|
|
1617
|
DBConnection dbConn = null;
|
|
1618
|
int serialNumber = -1;
|
|
1619
|
PreparedStatement pstmt = null;
|
|
1620
|
int serverCode = 0;
|
|
1621
|
|
|
1622
|
try {
|
|
1623
|
|
|
1624
|
//conn = util.openDBConnection();
|
|
1625
|
dbConn=DBConnectionPool.
|
|
1626
|
getDBConnection("MetacatReplication.getServerCode");
|
|
1627
|
serialNumber=dbConn.getCheckOutSerialNumber();
|
|
1628
|
pstmt = dbConn.prepareStatement("SELECT serverid FROM xml_replication " +
|
|
1629
|
"WHERE server LIKE '" + server + "'");
|
|
1630
|
pstmt.execute();
|
|
1631
|
ResultSet rs = pstmt.getResultSet();
|
|
1632
|
boolean tablehasrows = rs.next();
|
|
1633
|
if ( tablehasrows ) {
|
|
1634
|
serverCode = rs.getInt(1);
|
|
1635
|
pstmt.close();
|
|
1636
|
//conn.close();
|
|
1637
|
return serverCode;
|
|
1638
|
}
|
|
1639
|
|
|
1640
|
} catch(Exception e) {
|
|
1641
|
throw e;
|
|
1642
|
|
|
1643
|
} finally {
|
|
1644
|
try
|
|
1645
|
{
|
|
1646
|
pstmt.close();
|
|
1647
|
//conn.close();
|
|
1648
|
}//try
|
|
1649
|
catch(Exception ee)
|
|
1650
|
{
|
|
1651
|
logMetacat.error("Error in MetacatReplicatio.getServerCode: "
|
|
1652
|
+ee.getMessage());
|
|
1653
|
|
|
1654
|
}//catch
|
|
1655
|
finally
|
|
1656
|
{
|
|
1657
|
DBConnectionPool.returnDBConnection(dbConn, serialNumber);
|
|
1658
|
}//finally
|
|
1659
|
}//finally
|
|
1660
|
|
|
1661
|
return serverCode;
|
|
1662
|
}
|
|
1663
|
|
|
1664
|
/**
|
|
1665
|
* Method to get a host server information for given docid
|
|
1666
|
* @param conn a connection to the database
|
|
1667
|
*/
|
|
1668
|
public static Hashtable getHomeServerInfoForDocId(String docId)
|
|
1669
|
{
|
|
1670
|
Hashtable sl = new Hashtable();
|
|
1671
|
DBConnection dbConn = null;
|
|
1672
|
int serialNumber = -1;
|
|
1673
|
//MetaCatUtil ut=new MetaCatUtil();
|
|
1674
|
docId=MetaCatUtil.getDocIdFromString(docId);
|
|
1675
|
PreparedStatement pstmt=null;
|
|
1676
|
int serverLocation;
|
|
1677
|
try
|
|
1678
|
{
|
|
1679
|
//get conection
|
|
1680
|
dbConn=DBConnectionPool.
|
|
1681
|
getDBConnection("ReplicationHandler.getHomeServer");
|
|
1682
|
serialNumber=dbConn.getCheckOutSerialNumber();
|
|
1683
|
//get a server location from xml_document table
|
|
1684
|
pstmt=dbConn.prepareStatement("select server_location from xml_documents "
|
|
1685
|
+"where docid = ?");
|
|
1686
|
pstmt.setString(1, docId);
|
|
1687
|
pstmt.execute();
|
|
1688
|
ResultSet serverName = pstmt.getResultSet();
|
|
1689
|
//get a server location
|
|
1690
|
if(serverName.next())
|
|
1691
|
{
|
|
1692
|
serverLocation=serverName.getInt(1);
|
|
1693
|
pstmt.close();
|
|
1694
|
}
|
|
1695
|
else
|
|
1696
|
{
|
|
1697
|
pstmt.close();
|
|
1698
|
//ut.returnConnection(conn);
|
|
1699
|
return null;
|
|
1700
|
}
|
|
1701
|
pstmt=dbConn.prepareStatement("select server, last_checked, replicate " +
|
|
1702
|
"from xml_replication where serverid = ?");
|
|
1703
|
//increase usage count
|
|
1704
|
dbConn.increaseUsageCount(1);
|
|
1705
|
pstmt.setInt(1, serverLocation);
|
|
1706
|
pstmt.execute();
|
|
1707
|
ResultSet rs = pstmt.getResultSet();
|
|
1708
|
boolean tableHasRows = rs.next();
|
|
1709
|
if (tableHasRows)
|
|
1710
|
{
|
|
1711
|
|
|
1712
|
String server = rs.getString(1);
|
|
1713
|
String last_checked = rs.getString(2);
|
|
1714
|
if(!server.equals("localhost"))
|
|
1715
|
{
|
|
1716
|
sl.put(server, last_checked);
|
|
1717
|
}
|
|
1718
|
|
|
1719
|
}
|
|
1720
|
else
|
|
1721
|
{
|
|
1722
|
pstmt.close();
|
|
1723
|
//ut.returnConnection(conn);
|
|
1724
|
return null;
|
|
1725
|
}
|
|
1726
|
pstmt.close();
|
|
1727
|
}
|
|
1728
|
catch(Exception e)
|
|
1729
|
{
|
|
1730
|
System.out.println("error in replicationHandler.getHomeServer(): " +
|
|
1731
|
e.getMessage());
|
|
1732
|
}
|
|
1733
|
finally
|
|
1734
|
{
|
|
1735
|
try
|
|
1736
|
{
|
|
1737
|
pstmt.close();
|
|
1738
|
//ut.returnConnection(conn);
|
|
1739
|
}
|
|
1740
|
catch (Exception ee)
|
|
1741
|
{
|
|
1742
|
logMetacat.error("Eror irn rplicationHandler.getHomeServer() "+
|
|
1743
|
"to close pstmt: "+ee.getMessage());
|
|
1744
|
}
|
|
1745
|
finally
|
|
1746
|
{
|
|
1747
|
DBConnectionPool.returnDBConnection(dbConn, serialNumber);
|
|
1748
|
}
|
|
1749
|
|
|
1750
|
}//finally
|
|
1751
|
return sl;
|
|
1752
|
}
|
|
1753
|
|
|
1754
|
/**
|
|
1755
|
* Returns a home server location given a accnum
|
|
1756
|
* @param accNum , given accNum for a document
|
|
1757
|
*
|
|
1758
|
*/
|
|
1759
|
public static int getHomeServerCodeForDocId(String accNum) throws Exception
|
|
1760
|
{
|
|
1761
|
DBConnection dbConn = null;
|
|
1762
|
int serialNumber = -1;
|
|
1763
|
PreparedStatement pstmt = null;
|
|
1764
|
int serverCode = 1;
|
|
1765
|
//MetaCatUtil ut = new MetaCatUtil();
|
|
1766
|
String docId=MetaCatUtil.getDocIdFromString(accNum);
|
|
1767
|
|
|
1768
|
try
|
|
1769
|
{
|
|
1770
|
|
|
1771
|
// Get DBConnection
|
|
1772
|
dbConn=DBConnectionPool.
|
|
1773
|
getDBConnection("ReplicationHandler.getServerLocation");
|
|
1774
|
serialNumber=dbConn.getCheckOutSerialNumber();
|
|
1775
|
pstmt=dbConn.prepareStatement("SELECT server_location FROM xml_documents "
|
|
1776
|
+ "WHERE docid LIKE '" + docId + "'");
|
|
1777
|
pstmt.execute();
|
|
1778
|
ResultSet rs = pstmt.getResultSet();
|
|
1779
|
boolean tablehasrows = rs.next();
|
|
1780
|
//If a document is find, return the server location for it
|
|
1781
|
if ( tablehasrows )
|
|
1782
|
{
|
|
1783
|
serverCode = rs.getInt(1);
|
|
1784
|
pstmt.close();
|
|
1785
|
//conn.close();
|
|
1786
|
return serverCode;
|
|
1787
|
}
|
|
1788
|
//if couldn't find in xml_documents table, we think server code is 1
|
|
1789
|
//(this is new document)
|
|
1790
|
else
|
|
1791
|
{
|
|
1792
|
pstmt.close();
|
|
1793
|
//conn.close();
|
|
1794
|
return serverCode;
|
|
1795
|
}
|
|
1796
|
|
|
1797
|
}
|
|
1798
|
catch(Exception e)
|
|
1799
|
{
|
|
1800
|
|
|
1801
|
throw e;
|
|
1802
|
|
|
1803
|
}
|
|
1804
|
finally
|
|
1805
|
{
|
|
1806
|
try
|
|
1807
|
{
|
|
1808
|
pstmt.close();
|
|
1809
|
//conn.close();
|
|
1810
|
|
|
1811
|
}
|
|
1812
|
catch(Exception ee)
|
|
1813
|
{
|
|
1814
|
logMetacat.error("Erorr in Replication.getServerLocation "+
|
|
1815
|
"to close pstmt"+ee.getMessage());
|
|
1816
|
}
|
|
1817
|
finally
|
|
1818
|
{
|
|
1819
|
DBConnectionPool.returnDBConnection(dbConn, serialNumber);
|
|
1820
|
}//finally
|
|
1821
|
}//finally
|
|
1822
|
//return serverCode;
|
|
1823
|
}
|
|
1824
|
|
|
1825
|
|
|
1826
|
|
|
1827
|
/**
|
|
1828
|
* This method returns the content of a url
|
|
1829
|
* @param u the url to return the content from
|
|
1830
|
* @return a string representing the content of the url
|
|
1831
|
* @throws java.io.IOException
|
|
1832
|
*/
|
|
1833
|
public static String getURLContent(URL u) throws java.io.IOException
|
|
1834
|
{
|
|
1835
|
char istreamChar;
|
|
1836
|
int istreamInt;
|
|
1837
|
logMetacat.info("Before open the stream"+u.toString());
|
|
1838
|
InputStream input = u.openStream();
|
|
1839
|
logMetacat.info("Afetr open the stream"+u.toString());
|
|
1840
|
InputStreamReader istream = new InputStreamReader(input);
|
|
1841
|
StringBuffer serverResponse = new StringBuffer();
|
|
1842
|
while((istreamInt = istream.read()) != -1)
|
|
1843
|
{
|
|
1844
|
istreamChar = (char)istreamInt;
|
|
1845
|
serverResponse.append(istreamChar);
|
|
1846
|
}
|
|
1847
|
istream.close();
|
|
1848
|
input.close();
|
|
1849
|
|
|
1850
|
return serverResponse.toString();
|
|
1851
|
}
|
|
1852
|
|
|
1853
|
/**
|
|
1854
|
* Method for writing replication messages to a log file specified in
|
|
1855
|
* metacat.properties
|
|
1856
|
*/
|
|
1857
|
public static void replLog(String message)
|
|
1858
|
{
|
|
1859
|
try
|
|
1860
|
{
|
|
1861
|
FileOutputStream fos = new FileOutputStream(
|
|
1862
|
util.getOption("replicationlog"), true);
|
|
1863
|
PrintWriter pw = new PrintWriter(fos);
|
|
1864
|
SimpleDateFormat formatter = new SimpleDateFormat ("yy-MM-dd HH:mm:ss");
|
|
1865
|
java.util.Date localtime = new java.util.Date();
|
|
1866
|
String dateString = formatter.format(localtime);
|
|
1867
|
dateString += " :: " + message;
|
|
1868
|
//time stamp each entry
|
|
1869
|
pw.println(dateString);
|
|
1870
|
pw.flush();
|
|
1871
|
}
|
|
1872
|
catch(Exception e)
|
|
1873
|
{
|
|
1874
|
System.out.println("error writing to replication log from " +
|
|
1875
|
"MetacatReplication.replLog: " + e.getMessage());
|
|
1876
|
//e.printStackTrace(System.out);
|
|
1877
|
}
|
|
1878
|
}
|
|
1879
|
|
|
1880
|
/**
|
|
1881
|
* Method for writing replication messages to a log file specified in
|
|
1882
|
* metacat.properties
|
|
1883
|
*/
|
|
1884
|
public static void replErrorLog(String message)
|
|
1885
|
{
|
|
1886
|
try
|
|
1887
|
{
|
|
1888
|
FileOutputStream fos = new FileOutputStream(
|
|
1889
|
util.getOption("replicationerrorlog"), true);
|
|
1890
|
PrintWriter pw = new PrintWriter(fos);
|
|
1891
|
SimpleDateFormat formatter = new SimpleDateFormat ("yy-MM-dd HH:mm:ss");
|
|
1892
|
java.util.Date localtime = new java.util.Date();
|
|
1893
|
String dateString = formatter.format(localtime);
|
|
1894
|
dateString += " :: " + message;
|
|
1895
|
//time stamp each entry
|
|
1896
|
pw.println(dateString);
|
|
1897
|
pw.flush();
|
|
1898
|
}
|
|
1899
|
catch(Exception e)
|
|
1900
|
{
|
|
1901
|
System.out.println("error writing to replication log from " +
|
|
1902
|
"MetacatReplication.replLog: " + e.getMessage());
|
|
1903
|
//e.printStackTrace(System.out);
|
|
1904
|
}
|
|
1905
|
}
|
|
1906
|
|
|
1907
|
/**
|
|
1908
|
* Returns true if the replicate field for server in xml_replication is 1.
|
|
1909
|
* Returns false otherwise
|
|
1910
|
*/
|
|
1911
|
public static boolean replToServer(String server)
|
|
1912
|
{
|
|
1913
|
DBConnection dbConn = null;
|
|
1914
|
int serialNumber = -1;
|
|
1915
|
PreparedStatement pstmt = null;
|
|
1916
|
try
|
|
1917
|
{
|
|
1918
|
dbConn=DBConnectionPool.
|
|
1919
|
getDBConnection("MetacatReplication.repltoServer");
|
|
1920
|
serialNumber=dbConn.getCheckOutSerialNumber();
|
|
1921
|
pstmt = dbConn.prepareStatement("select replicate from " +
|
|
1922
|
"xml_replication where server like '" +
|
|
1923
|
server + "'");
|
|
1924
|
pstmt.execute();
|
|
1925
|
ResultSet rs = pstmt.getResultSet();
|
|
1926
|
boolean tablehasrows = rs.next();
|
|
1927
|
if(tablehasrows)
|
|
1928
|
{
|
|
1929
|
int i = rs.getInt(1);
|
|
1930
|
if(i == 1)
|
|
1931
|
{
|
|
1932
|
pstmt.close();
|
|
1933
|
//conn.close();
|
|
1934
|
return true;
|
|
1935
|
}
|
|
1936
|
else
|
|
1937
|
{
|
|
1938
|
pstmt.close();
|
|
1939
|
//conn.close();
|
|
1940
|
return false;
|
|
1941
|
}
|
|
1942
|
}
|
|
1943
|
}
|
|
1944
|
catch(Exception e)
|
|
1945
|
{
|
|
1946
|
System.out.println("error in MetacatReplication.replToServer: " +
|
|
1947
|
e.getMessage());
|
|
1948
|
}
|
|
1949
|
finally
|
|
1950
|
{
|
|
1951
|
try
|
|
1952
|
{
|
|
1953
|
pstmt.close();
|
|
1954
|
//conn.close();
|
|
1955
|
}//try
|
|
1956
|
catch(Exception ee)
|
|
1957
|
{
|
|
1958
|
logMetacat.error("Error in MetacatReplication.replToServer: "
|
|
1959
|
+ee.getMessage());
|
|
1960
|
}//catch
|
|
1961
|
finally
|
|
1962
|
{
|
|
1963
|
DBConnectionPool.returnDBConnection(dbConn, serialNumber);
|
|
1964
|
}//finally
|
|
1965
|
}//finally
|
|
1966
|
return false;
|
|
1967
|
//the default if this server does not exist is to not replicate to it.
|
|
1968
|
}
|
|
1969
|
|
|
1970
|
|
|
1971
|
}
|