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/**
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* '$RCSfile$'
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* Purpose: A class to asyncronously do delta-T replication checking
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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: 2005-09-08 16:02:28 -0700 (Thu, 08 Sep 2005) $'
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* '$Revision: 2578 $'
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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.sql.*;
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import java.util.*;
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import java.util.Date;
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import java.lang.Thread;
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import java.io.*;
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import java.net.*;
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import java.text.*;
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import org.xml.sax.AttributeList;
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import org.xml.sax.ContentHandler;
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import org.xml.sax.DTDHandler;
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import org.xml.sax.EntityResolver;
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import org.xml.sax.ErrorHandler;
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import org.xml.sax.InputSource;
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import org.xml.sax.XMLReader;
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import org.xml.sax.SAXException;
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import org.xml.sax.SAXParseException;
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import org.xml.sax.helpers.XMLReaderFactory;
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import org.xml.sax.helpers.DefaultHandler;
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/**
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* This class handles deltaT replication checking. Whenever this TimerTask
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* is fired it checks each server in xml_replication for updates and updates
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* the local db as needed.
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*/
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public class ReplicationHandler extends TimerTask
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{
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int serverCheckCode = 1;
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MetaCatUtil util = new MetaCatUtil();
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ReplicationServerList serverList = null;
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//PrintWriter out;
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private static final AbstractDatabase dbAdapter = MetaCatUtil.dbAdapter;
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public ReplicationHandler()
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{
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//this.out = o;
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serverList = new ReplicationServerList();
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}
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public ReplicationHandler(int serverCheckCode)
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{
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//this.out = o;
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this.serverCheckCode = serverCheckCode;
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serverList = new ReplicationServerList();
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}
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/**
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* Method that implements TimerTask.run(). It runs whenever the timer is
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* fired.
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*/
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public void run()
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{
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//find out the last_checked time of each server in the server list and
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//send a query to each server to see if there are any documents in
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//xml_documents with an update_date > last_checked
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try
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{
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//if serverList is null, metacat don't need to replication
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if (serverList==null||serverList.isEmpty())
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{
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return;
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}
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updateCatalog();
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update();
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//conn.close();
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}//try
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catch (Exception e)
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{
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MetaCatUtil.debugMessage("Error in replicationHandler.run():"
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+e.getMessage(), 30);
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e.printStackTrace();
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}//catch
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}
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/**
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* Method that uses revision taging for replication instead of update_date.
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*/
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private void update()
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{
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/*
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Pseudo-algorithm
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- request a doc list from each server in xml_replication
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- check the rev number of each of those documents agains the
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documents in the local database
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- pull any documents that have a lesser rev number on the local server
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from the remote server
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- delete any documents that still exist in the local xml_documents but
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are in the deletedDocuments tag of the remote host response.
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- update last_checked to keep track of the last time it was checked.
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(this info is theoretically not needed using this system but probably
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should be kept anyway)
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*/
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ReplicationServer replServer = null; // Variable to store the
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// ReplicationServer got from
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// Server list
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String server = null; // Variable to store server name
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String update;
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ReplMessageHandler message = new ReplMessageHandler();
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Vector responses = new Vector();
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boolean flag=false; // If a document need to update
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boolean dataFile=false;
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String action = new String();
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XMLReader parser;
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URL u;
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try
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{
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parser = initParser(message);
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}
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catch (Exception e)
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{
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MetacatReplication.replErrorLog("Failed to replicate becaue couldn't "+
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" initParser for message and" +e.getMessage());
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MetaCatUtil.debugMessage("Failed to replicate becaue couldn't " +
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" initParser for message and " +e.getMessage(), 30);
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// stop replication
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return;
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}
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//Check for every server in server list to get updated list and put
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// them in to response
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for (int i=0; i<serverList.size(); i++)
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{
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// Get ReplicationServer object from server list
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replServer = serverList.serverAt(i);
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// Get server name from ReplicationServer object
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server = replServer.getServerName().trim();
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String result = null;
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MetacatReplication.replLog("full update started to: " + server);
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// Send command to that server to get updated docid information
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try
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{
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u = new URL("https://" + server + "?server="
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+util.getLocalReplicationServerName()+"&action=update");
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MetaCatUtil.debugMessage("Sending infomation " +u.toString(), 50);
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result = MetacatReplication.getURLContent(u);
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}
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catch (Exception e)
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{
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MetacatReplication.replErrorLog("Failed to get updated doc list "+
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"for server " + server + " because "+e.getMessage());
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MetaCatUtil.debugMessage( "Failed to get updated doc list "+
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"for server " + server + " because "+e.getMessage(), 30);
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continue;
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}
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MetaCatUtil.debugMessage("docid: "+server+" "+result, 50);
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//check if result have error or not, if has skip it.
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if (result.indexOf("<error>")!=-1 && result.indexOf("</error>")!=-1)
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{
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MetacatReplication.replErrorLog("Failed to get updated doc list "+
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"for server " + server + " because "+result);
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MetaCatUtil.debugMessage( "Failed to get updated doc list "+
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"for server " + server + " because "+result, 30);
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continue;
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}
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//Add result to vector
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responses.add(result);
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}
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//make sure that there is updated file list
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//If response is null, metacat don't need do anything
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if (responses==null || responses.isEmpty())
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{
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MetacatReplication.replErrorLog("No updated doc list for "+
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"every server and failed to replicate");
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MetaCatUtil.debugMessage( "No updated doc list for "+
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"every server and failed to replicate", 30);
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return;
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}
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MetaCatUtil.debugMessage("Responses from remote metacat about updated "+
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"document information: "+ responses.toString(), 35);
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// go through response vector(it contains updated vector and delete vector
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for(int i=0; i<responses.size(); i++)
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{
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try
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{
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parser.parse(new InputSource(
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new StringReader(
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(String)(responses.elementAt(i)))));
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}
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catch(Exception e)
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{
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MetacatReplication.replErrorLog("Couldn't parse one responses "+
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"because "+ e.getMessage());
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MetaCatUtil.debugMessage("Couldn't parse one responses "+
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"because "+ e.getMessage(), 30);
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continue;
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}
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//v is the list of updated documents
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Vector updateList = new Vector(message.getUpdatesVect());
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//System.out.println("v: " + v.toString());
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//d is the list of deleted documents
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Vector deleteList = new Vector(message.getDeletesVect());
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//System.out.println("d: " + d.toString());
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MetaCatUtil.debugMessage("Update vector size: "+ updateList.size(), 40);
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MetaCatUtil.debugMessage("Delete vector size: "+ deleteList.size(),40);
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// go though every element in updated document vector
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for(int j=0; j<updateList.size(); j++)
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{
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//initial dataFile is false
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dataFile=false;
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//w is information for one document, information contain
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//docid, rev, server or datafile.
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Vector w = new Vector((Vector)(updateList.elementAt(j)));
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//Check if the vector w contain "datafile"
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//If it has, this document is data file
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if (w.contains((String)util.getOption("datafileflag")))
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{
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dataFile=true;
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}
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//System.out.println("w: " + w.toString());
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// Get docid
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String docid = (String)w.elementAt(0);
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MetaCatUtil.debugMessage("docid: " + docid, 40);
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// Get revision number
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int rev = Integer.parseInt((String)w.elementAt(1));
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MetaCatUtil.debugMessage("rev: " + rev, 40);
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// Get remote server name (it is may not be doc homeserver because
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// the new hub feature
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String remoteServer = (String)w.elementAt(2);
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remoteServer = remoteServer.trim();
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// compare the update rev and local rev to see what need happen
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int localrev = -1;
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try
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{
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localrev = DocumentImpl.getLatestRevisionNumber(docid);
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}
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catch (SQLException e)
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{
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MetaCatUtil.debugMessage("Local rev for docid "+ docid + " could not "+
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" be found because " + e.getMessage(), 45);
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MetacatReplication.replErrorLog("Docid "+ docid + " could not be "+
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"written because error happend to find it's local revision");
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continue;
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}
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MetaCatUtil.debugMessage("Local rev for docid "+ docid + " is "+
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localrev, 45);
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//check the revs for an update because this document is in the
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//local DB, it might be out of date.
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if (localrev == -1)
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{
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//insert this document as new because it is not in the local DB
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action = "INSERT";
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flag = true;
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}
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else
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{
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if(localrev == rev)
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{
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// Local meatacat has the same rev to remote host, don't need
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// update and flag set false
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flag = false;
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}
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else if(localrev < rev)
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{
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//this document needs to be updated so send an read request
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action = "UPDATE";
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flag = true;
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}
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}
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// this is non-data file
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if(flag && !dataFile)
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{
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try
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{
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handleSingleXMLDocument(remoteServer, action, docid);
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}
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catch(Exception e)
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{
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// skip this document
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continue;
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}
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}//if for non-data file
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// this is for data file
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if(flag && dataFile)
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{
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try
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{
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handleSingleDataFile(remoteServer, action, docid);
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}
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catch(Exception e)
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{
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// skip this datafile
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continue;
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}
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}//for datafile
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}//for update docs
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//handle deleted docs
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for(int k=0; k<deleteList.size(); k++)
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{ //delete the deleted documents;
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Vector w = new Vector((Vector)deleteList.elementAt(k));
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String docId = (String)w.elementAt(0);
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try
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{
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handleDeleteSingleDocument(docId, server);
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}
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catch (Exception ee)
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{
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continue;
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}
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}//for delete docs
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}//for response
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345
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//updated last_checked
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for (int i=0;i<serverList.size(); i++)
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{
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// Get ReplicationServer object from server list
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replServer = serverList.serverAt(i);
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try
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{
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updateLastCheckTimeForSingleServer(replServer);
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}
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catch(Exception e)
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356
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{
|
357
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continue;
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}
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359
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}//for
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360
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361
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}//update
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362
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363
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/* Handle replicate single xml document*/
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364
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private void handleSingleXMLDocument(String remoteserver, String actions,
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String docId)
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throws Exception
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{
|
368
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DBConnection dbConn = null;
|
369
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int serialNumber = -1;
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370
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try
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371
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{
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372
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// Get DBConnection from pool
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373
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dbConn=DBConnectionPool.
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374
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getDBConnection("ReplicationHandler.handleSingleXMLDocument");
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375
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serialNumber=dbConn.getCheckOutSerialNumber();
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376
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//if the document needs to be updated or inserted, this is executed
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377
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String readDocURLString = "https://" + remoteserver + "?server="+
|
378
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util.getLocalReplicationServerName()+"&action=read&docid="+docId;
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379
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readDocURLString = MetaCatUtil.replaceWhiteSpaceForURL(readDocURLString);
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380
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URL u = new URL(readDocURLString);
|
381
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|
382
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// Get docid content
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383
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String newxmldoc = MetacatReplication.getURLContent(u);
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384
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// If couldn't get skip it
|
385
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if ( newxmldoc.indexOf("<error>")!= -1 && newxmldoc.indexOf("</error>")!=-1)
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386
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{
|
387
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throw new Exception(newxmldoc);
|
388
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}
|
389
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MetaCatUtil.debugMessage("xml documnet:", 45);
|
390
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MetaCatUtil.debugMessage(newxmldoc, 45);
|
391
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|
392
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// Try get the docid info from remote server
|
393
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DocInfoHandler dih = new DocInfoHandler();
|
394
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XMLReader docinfoParser = initParser(dih);
|
395
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String docInfoURLStr = "https://" + remoteserver +
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396
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"?server="+util.getLocalReplicationServerName()+
|
397
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"&action=getdocumentinfo&docid="+docId;
|
398
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docInfoURLStr = MetaCatUtil.replaceWhiteSpaceForURL(docInfoURLStr);
|
399
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URL docinfoUrl = new URL(docInfoURLStr);
|
400
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MetaCatUtil.debugMessage("Sending message: " +
|
401
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docinfoUrl.toString(), 45);
|
402
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String docInfoStr = MetacatReplication.getURLContent(docinfoUrl);
|
403
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docinfoParser.parse(new InputSource(new StringReader(docInfoStr)));
|
404
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Hashtable docinfoHash = dih.getDocInfo();
|
405
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// Get home server of the docid
|
406
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String docHomeServer = (String)docinfoHash.get("home_server");
|
407
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MetaCatUtil.debugMessage("doc home server in repl: "+docHomeServer, 45);
|
408
|
|
409
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//docid should include rev number too
|
410
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String accnum=docId+util.getOption("accNumSeparator")+
|
411
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(String)docinfoHash.get("rev");
|
412
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MetaCatUtil.debugMessage("docid in repl: "+accnum, 45);
|
413
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String docType = (String)docinfoHash.get("doctype");
|
414
|
MetaCatUtil.debugMessage("doctype in repl: "+docType, 45);
|
415
|
|
416
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String parserBase = null;
|
417
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// this for eml2 and we need user eml2 parser
|
418
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if (docType != null && (docType.trim()).equals(DocumentImpl.EML2_0_0NAMESPACE))
|
419
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{
|
420
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parserBase = DocumentImpl.EML200;
|
421
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}
|
422
|
else if (docType != null && (docType.trim()).equals(DocumentImpl.EML2_0_1NAMESPACE))
|
423
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{
|
424
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parserBase = DocumentImpl.EML200;
|
425
|
}
|
426
|
else if (docType != null && (docType.trim()).equals(DocumentImpl.EML2_1_0NAMESPACE))
|
427
|
{
|
428
|
parserBase = DocumentImpl.EML210;
|
429
|
}
|
430
|
// Write the document into local host
|
431
|
DocumentImplWrapper wrapper = new DocumentImplWrapper(parserBase, false);
|
432
|
String newDocid = wrapper.writeReplication(dbConn,
|
433
|
new StringReader(newxmldoc),
|
434
|
(String)docinfoHash.get("public_access"),
|
435
|
null, /* the dtd text */
|
436
|
actions,
|
437
|
accnum,
|
438
|
(String)docinfoHash.get("user_owner"),
|
439
|
null, /* null for groups[] */
|
440
|
docHomeServer,
|
441
|
remoteserver);
|
442
|
MetaCatUtil.debugMessage("Successfully replicated doc " + accnum, 35);
|
443
|
MetacatReplication.replLog("wrote doc " + accnum + " from " +
|
444
|
remoteserver);
|
445
|
|
446
|
}//try
|
447
|
catch(Exception e)
|
448
|
{
|
449
|
MetacatReplication.replErrorLog("Failed to write doc " + docId +
|
450
|
" into db because " +e.getMessage());
|
451
|
MetaCatUtil.debugMessage("Failed to write doc " + docId +
|
452
|
" into db because " +e.getMessage(), 30);
|
453
|
throw e;
|
454
|
}
|
455
|
finally
|
456
|
{
|
457
|
//return DBConnection
|
458
|
DBConnectionPool.returnDBConnection(dbConn, serialNumber);
|
459
|
}//finally
|
460
|
}
|
461
|
|
462
|
|
463
|
|
464
|
/* Handle replicate single xml document*/
|
465
|
private void handleSingleDataFile(String remoteserver, String actions,
|
466
|
String docId)
|
467
|
throws Exception
|
468
|
{
|
469
|
MetaCatUtil.debugMessage("Try to replicate data file: "+docId, 40);
|
470
|
DBConnection dbConn = null;
|
471
|
int serialNumber = -1;
|
472
|
try
|
473
|
{
|
474
|
// Get DBConnection from pool
|
475
|
dbConn=DBConnectionPool.
|
476
|
getDBConnection("ReplicationHandler.handleSinlgeDataFile");
|
477
|
serialNumber=dbConn.getCheckOutSerialNumber();
|
478
|
// Try get docid info from remote server
|
479
|
DocInfoHandler dih = new DocInfoHandler();
|
480
|
XMLReader docinfoParser = initParser(dih);
|
481
|
String docInfoURLString = "https://" + remoteserver +
|
482
|
"?server="+util.getLocalReplicationServerName()+
|
483
|
"&action=getdocumentinfo&docid="+docId;
|
484
|
docInfoURLString = MetaCatUtil.replaceWhiteSpaceForURL(docInfoURLString);
|
485
|
URL docinfoUrl = new URL(docInfoURLString);
|
486
|
|
487
|
String docInfoStr = MetacatReplication.getURLContent(docinfoUrl);
|
488
|
docinfoParser.parse(new InputSource(new StringReader(docInfoStr)));
|
489
|
Hashtable docinfoHash = dih.getDocInfo();
|
490
|
// Get doicd owner
|
491
|
String user = (String)docinfoHash.get("user_owner");
|
492
|
// Get docid name (such as acl or dataset)
|
493
|
String docName = (String)docinfoHash.get("docname");
|
494
|
// Get doc type (eml public id)
|
495
|
String docType = (String)docinfoHash.get("doctype");
|
496
|
// Get docid home sever. it might be different to remoteserver
|
497
|
// becuause of hub feature
|
498
|
String docHomeServer = (String)docinfoHash.get("home_server");
|
499
|
|
500
|
//docid should include rev number too
|
501
|
String accnum=docId+util.getOption("accNumSeparator")+
|
502
|
(String)docinfoHash.get("rev");
|
503
|
|
504
|
|
505
|
String datafilePath = util.getOption("datafilepath");
|
506
|
// Get data file content
|
507
|
String readDataURLString = "https://" + remoteserver + "?server="+
|
508
|
util.getLocalReplicationServerName()+
|
509
|
"&action=readdata&docid="+accnum;
|
510
|
readDataURLString = MetaCatUtil.replaceWhiteSpaceForURL(readDataURLString);
|
511
|
URL u = new URL(readDataURLString);
|
512
|
InputStream input = u.openStream();
|
513
|
//register data file into xml_documents table and wite data file
|
514
|
//into file system
|
515
|
if ( input != null)
|
516
|
{
|
517
|
DocumentImpl.writeDataFileInReplication(input,
|
518
|
datafilePath,
|
519
|
docName,docType,
|
520
|
accnum, user,
|
521
|
docHomeServer,
|
522
|
remoteserver);
|
523
|
MetaCatUtil.debugMessage("Successfully to write datafile " + docId, 30);
|
524
|
MetacatReplication.replLog("wrote datafile " + accnum + " from " +
|
525
|
remoteserver);
|
526
|
}//if
|
527
|
else
|
528
|
{
|
529
|
MetaCatUtil.debugMessage("Couldn't open the data file: " + accnum, 30);
|
530
|
throw new Exception("Couldn't open the data file: " + accnum);
|
531
|
}//else
|
532
|
|
533
|
}//try
|
534
|
catch(Exception e)
|
535
|
{
|
536
|
MetacatReplication.replErrorLog("Failed to try wrote datafile " + docId +
|
537
|
" because " +e.getMessage());
|
538
|
MetaCatUtil.debugMessage("Failed to try wrote datafile " + docId +
|
539
|
" because " +e.getMessage(), 30);
|
540
|
throw e;
|
541
|
}
|
542
|
finally
|
543
|
{
|
544
|
//return DBConnection
|
545
|
DBConnectionPool.returnDBConnection(dbConn, serialNumber);
|
546
|
}//finally
|
547
|
}
|
548
|
|
549
|
|
550
|
|
551
|
/* Handle delete single document*/
|
552
|
private void handleDeleteSingleDocument(String docId, String notifyServer)
|
553
|
throws Exception
|
554
|
{
|
555
|
MetaCatUtil.debugMessage("Try delete doc: "+docId, 40);
|
556
|
DBConnection dbConn = null;
|
557
|
int serialNumber = -1;
|
558
|
try
|
559
|
{
|
560
|
// Get DBConnection from pool
|
561
|
dbConn=DBConnectionPool.
|
562
|
getDBConnection("ReplicationHandler.handleDeleteSingleDoc");
|
563
|
serialNumber=dbConn.getCheckOutSerialNumber();
|
564
|
if(!alreadyDeleted(docId))
|
565
|
{
|
566
|
|
567
|
//because delete method docid should have rev number
|
568
|
//so we just add one for it. This rev number is no sence.
|
569
|
String accnum=docId+util.getOption("accNumSeparator")+"1";
|
570
|
//System.out.println("accnum: "+accnum);
|
571
|
DocumentImpl.delete(accnum, null, null, notifyServer);
|
572
|
MetaCatUtil.debugMessage("Successfully deleted doc " + docId, 30);
|
573
|
MetacatReplication.replLog("Doc " + docId + " deleted");
|
574
|
}
|
575
|
|
576
|
}//try
|
577
|
catch(Exception e)
|
578
|
{
|
579
|
MetacatReplication.replErrorLog("Failed to delete doc " + docId +
|
580
|
" in db because " +e.getMessage());
|
581
|
MetaCatUtil.debugMessage("Failed to delete doc " + docId +
|
582
|
" in db because because " +e.getMessage(), 30);
|
583
|
throw e;
|
584
|
}
|
585
|
finally
|
586
|
{
|
587
|
//return DBConnection
|
588
|
DBConnectionPool.returnDBConnection(dbConn, serialNumber);
|
589
|
}//finally
|
590
|
}
|
591
|
|
592
|
/* Handle updateLastCheckTimForSingleServer*/
|
593
|
private void updateLastCheckTimeForSingleServer(ReplicationServer repServer)
|
594
|
throws Exception
|
595
|
{
|
596
|
String server = repServer.getServerName();
|
597
|
DBConnection dbConn = null;
|
598
|
int serialNumber = -1;
|
599
|
PreparedStatement pstmt = null;
|
600
|
try
|
601
|
{
|
602
|
// Get DBConnection from pool
|
603
|
dbConn=DBConnectionPool.
|
604
|
getDBConnection("ReplicationHandler.updateLastCheckTimeForServer");
|
605
|
serialNumber=dbConn.getCheckOutSerialNumber();
|
606
|
|
607
|
MetaCatUtil.debugMessage("Try to update last_check for server: "+server, 40);
|
608
|
// Get time from remote server
|
609
|
URL dateurl = new URL("https://" + server + "?server="+
|
610
|
util.getLocalReplicationServerName()+"&action=gettime");
|
611
|
String datexml = MetacatReplication.getURLContent(dateurl);
|
612
|
MetaCatUtil.debugMessage("datexml: "+datexml, 45);
|
613
|
if (datexml!=null && !datexml.equals(""))
|
614
|
{
|
615
|
String datestr = datexml.substring(11, datexml.indexOf('<', 11));
|
616
|
StringBuffer sql = new StringBuffer();
|
617
|
/*sql.append("update xml_replication set last_checked = to_date('");
|
618
|
sql.append(datestr).append("', 'YY-MM-DD HH24:MI:SS') where ");
|
619
|
sql.append("server like '").append(server).append("'");*/
|
620
|
sql.append("update xml_replication set last_checked = ");
|
621
|
sql.append(dbAdapter.toDate(datestr, "MM/DD/YY HH24:MI:SS"));
|
622
|
sql.append(" where server like '").append(server).append("'");
|
623
|
pstmt = dbConn.prepareStatement(sql.toString());
|
624
|
|
625
|
pstmt.executeUpdate();
|
626
|
dbConn.commit();
|
627
|
pstmt.close();
|
628
|
MetaCatUtil.debugMessage("last_checked updated to "+datestr+" on "
|
629
|
+ server, 45);
|
630
|
}//if
|
631
|
else
|
632
|
{
|
633
|
|
634
|
MetaCatUtil.debugMessage("Failed to update last_checked for server " +
|
635
|
server + " in db because couldn't get time "
|
636
|
, 30);
|
637
|
throw new Exception("Couldn't get time for server "+ server);
|
638
|
}
|
639
|
|
640
|
}//try
|
641
|
catch(Exception e)
|
642
|
{
|
643
|
|
644
|
MetaCatUtil.debugMessage("Failed to update last_checked for server " +
|
645
|
server + " in db because because " +
|
646
|
e.getMessage(), 30);
|
647
|
throw e;
|
648
|
}
|
649
|
finally
|
650
|
{
|
651
|
//return DBConnection
|
652
|
DBConnectionPool.returnDBConnection(dbConn, serialNumber);
|
653
|
}//finally
|
654
|
}
|
655
|
|
656
|
|
657
|
|
658
|
/**
|
659
|
* updates xml_catalog with entries from other servers.
|
660
|
*/
|
661
|
private void updateCatalog()
|
662
|
{
|
663
|
MetaCatUtil.debugMessage("Start of updateCatalog", 35 );
|
664
|
// ReplicationServer object in server list
|
665
|
ReplicationServer replServer = null;
|
666
|
PreparedStatement pstmt = null;
|
667
|
String server = null;
|
668
|
|
669
|
|
670
|
// Go through each ReplicationServer object in sererlist
|
671
|
for (int j=0; j<serverList.size(); j++)
|
672
|
{
|
673
|
Vector remoteCatalog = new Vector();
|
674
|
Vector publicId = new Vector();
|
675
|
try
|
676
|
{
|
677
|
// Get ReplicationServer object from server list
|
678
|
replServer = serverList.serverAt(j);
|
679
|
// Get server name from the ReplicationServer object
|
680
|
server = replServer.getServerName();
|
681
|
// Try to get catalog
|
682
|
URL u = new URL("https://" + server + "?server="+
|
683
|
util.getLocalReplicationServerName()+"&action=getcatalog");
|
684
|
MetaCatUtil.debugMessage("sending message " + u.toString(), 50);
|
685
|
String catxml = MetacatReplication.getURLContent(u);
|
686
|
|
687
|
// Make sure there are not error, no empty string
|
688
|
if (catxml.indexOf("error")!=-1 || catxml==null||catxml.equals(""))
|
689
|
{
|
690
|
throw new Exception("Couldn't get catalog list form server " +server);
|
691
|
}
|
692
|
MetaCatUtil.debugMessage("catxml: " + catxml, 40);
|
693
|
CatalogMessageHandler cmh = new CatalogMessageHandler();
|
694
|
XMLReader catparser = initParser(cmh);
|
695
|
catparser.parse(new InputSource(new StringReader(catxml)));
|
696
|
//parse the returned catalog xml and put it into a vector
|
697
|
remoteCatalog = cmh.getCatalogVect();
|
698
|
|
699
|
// Makse sure remoteCatalog is not empty
|
700
|
if (remoteCatalog.isEmpty())
|
701
|
{
|
702
|
throw new Exception("Couldn't get catalog list form server " +server);
|
703
|
}
|
704
|
|
705
|
String localcatxml = MetacatReplication.getCatalogXML();
|
706
|
|
707
|
// Make sure local catalog is no empty
|
708
|
if (localcatxml==null||localcatxml.equals(""))
|
709
|
{
|
710
|
throw new Exception("Couldn't get catalog list form server " +server);
|
711
|
}
|
712
|
|
713
|
cmh = new CatalogMessageHandler();
|
714
|
catparser = initParser(cmh);
|
715
|
catparser.parse(new InputSource(new StringReader(localcatxml)));
|
716
|
Vector localCatalog = cmh.getCatalogVect();
|
717
|
|
718
|
//now we have the catalog from the remote server and this local server
|
719
|
//we now need to compare the two and merge the differences.
|
720
|
//the comparison is base on the public_id fields which is the 4th
|
721
|
//entry in each row vector.
|
722
|
publicId = new Vector();
|
723
|
for(int i=0; i<localCatalog.size(); i++)
|
724
|
{
|
725
|
Vector v = new Vector((Vector)localCatalog.elementAt(i));
|
726
|
MetaCatUtil.debugMessage("v1: " + v.toString(), 50);
|
727
|
publicId.add(new String((String)v.elementAt(3)));
|
728
|
//System.out.println("adding " + (String)v.elementAt(3));
|
729
|
}
|
730
|
}//try
|
731
|
catch (Exception e)
|
732
|
{
|
733
|
MetacatReplication.replErrorLog("Failed to update catalog for server "+
|
734
|
server + " because " +e.getMessage());
|
735
|
MetaCatUtil.debugMessage("Failed to update catalog for server "+
|
736
|
server + " because " +e.getMessage(), 30);
|
737
|
}//catch
|
738
|
|
739
|
for(int i=0; i<remoteCatalog.size(); i++)
|
740
|
{
|
741
|
// DConnection
|
742
|
DBConnection dbConn = null;
|
743
|
// DBConnection checkout serial number
|
744
|
int serialNumber = -1;
|
745
|
try
|
746
|
{
|
747
|
dbConn=DBConnectionPool.
|
748
|
getDBConnection("ReplicationHandler.updateCatalog");
|
749
|
serialNumber=dbConn.getCheckOutSerialNumber();
|
750
|
Vector v = (Vector)remoteCatalog.elementAt(i);
|
751
|
//System.out.println("v2: " + v.toString());
|
752
|
//System.out.println("i: " + i);
|
753
|
//System.out.println("remoteCatalog.size(): " + remoteCatalog.size());
|
754
|
//System.out.println("publicID: " + publicId.toString());
|
755
|
MetaCatUtil.debugMessage
|
756
|
("v.elementAt(3): " + (String)v.elementAt(3), 50);
|
757
|
if(!publicId.contains(v.elementAt(3)))
|
758
|
{ //so we don't have this public id in our local table so we need to
|
759
|
//add it.
|
760
|
//System.out.println("in if");
|
761
|
StringBuffer sql = new StringBuffer();
|
762
|
sql.append("insert into xml_catalog (entry_type, source_doctype, ");
|
763
|
sql.append("target_doctype, public_id, system_id) values (?,?,?,");
|
764
|
sql.append("?,?)");
|
765
|
//System.out.println("sql: " + sql.toString());
|
766
|
pstmt = dbConn.prepareStatement(sql.toString());
|
767
|
pstmt.setString(1, (String)v.elementAt(0));
|
768
|
pstmt.setString(2, (String)v.elementAt(1));
|
769
|
pstmt.setString(3, (String)v.elementAt(2));
|
770
|
pstmt.setString(4, (String)v.elementAt(3));
|
771
|
pstmt.setString(5, (String)v.elementAt(4));
|
772
|
pstmt.execute();
|
773
|
pstmt.close();
|
774
|
MetacatReplication.replLog("Success fully to insert new publicid "+
|
775
|
(String)v.elementAt(3) + " from server"+server);
|
776
|
MetaCatUtil.debugMessage("Success fully to insert new publicid "+
|
777
|
(String)v.elementAt(3) + " from server" +server, 30);
|
778
|
}
|
779
|
}
|
780
|
catch(Exception e)
|
781
|
{
|
782
|
MetacatReplication.replErrorLog("Failed to update catalog for server "+
|
783
|
server + " because " +e.getMessage());
|
784
|
MetaCatUtil.debugMessage("Failed to update catalog for server "+
|
785
|
server + " because " +e.getMessage(), 30);
|
786
|
}//catch
|
787
|
finally
|
788
|
{
|
789
|
DBConnectionPool.returnDBConnection(dbConn, serialNumber);
|
790
|
}//finall
|
791
|
}//for remote catalog
|
792
|
}//for server list
|
793
|
MetaCatUtil.debugMessage("End of updateCatalog", 35);
|
794
|
}
|
795
|
|
796
|
/**
|
797
|
* Method that returns true if docid has already been "deleted" from metacat.
|
798
|
* This method really implements a truth table for deleted documents
|
799
|
* The table is (a docid in one of the tables is represented by the X):
|
800
|
* xml_docs xml_revs deleted?
|
801
|
* ------------------------------------
|
802
|
* X X FALSE
|
803
|
* X _ FALSE
|
804
|
* _ X TRUE
|
805
|
* _ _ TRUE
|
806
|
*/
|
807
|
private static boolean alreadyDeleted(String docid) throws Exception
|
808
|
{
|
809
|
DBConnection dbConn = null;
|
810
|
int serialNumber = -1;
|
811
|
PreparedStatement pstmt = null;
|
812
|
try
|
813
|
{
|
814
|
dbConn=DBConnectionPool.
|
815
|
getDBConnection("ReplicationHandler.alreadyDeleted");
|
816
|
serialNumber=dbConn.getCheckOutSerialNumber();
|
817
|
boolean xml_docs = false;
|
818
|
boolean xml_revs = false;
|
819
|
|
820
|
StringBuffer sb = new StringBuffer();
|
821
|
sb.append("select docid from xml_revisions where docid like '");
|
822
|
sb.append(docid).append("'");
|
823
|
pstmt = dbConn.prepareStatement(sb.toString());
|
824
|
pstmt.execute();
|
825
|
ResultSet rs = pstmt.getResultSet();
|
826
|
boolean tablehasrows = rs.next();
|
827
|
if(tablehasrows)
|
828
|
{
|
829
|
xml_revs = true;
|
830
|
}
|
831
|
|
832
|
sb = new StringBuffer();
|
833
|
sb.append("select docid from xml_documents where docid like '");
|
834
|
sb.append(docid).append("'");
|
835
|
pstmt.close();
|
836
|
pstmt = dbConn.prepareStatement(sb.toString());
|
837
|
//increase usage count
|
838
|
dbConn.increaseUsageCount(1);
|
839
|
pstmt.execute();
|
840
|
rs = pstmt.getResultSet();
|
841
|
tablehasrows = rs.next();
|
842
|
pstmt.close();
|
843
|
if(tablehasrows)
|
844
|
{
|
845
|
xml_docs = true;
|
846
|
}
|
847
|
|
848
|
if(xml_docs && xml_revs)
|
849
|
{
|
850
|
return false;
|
851
|
}
|
852
|
else if(xml_docs && !xml_revs)
|
853
|
{
|
854
|
return false;
|
855
|
}
|
856
|
else if(!xml_docs && xml_revs)
|
857
|
{
|
858
|
return true;
|
859
|
}
|
860
|
else if(!xml_docs && !xml_revs)
|
861
|
{
|
862
|
return true;
|
863
|
}
|
864
|
}
|
865
|
catch(Exception e)
|
866
|
{
|
867
|
MetaCatUtil.debugMessage("error in ReplicationHandler.alreadyDeleted: " +
|
868
|
e.getMessage(), 30);
|
869
|
throw e;
|
870
|
}
|
871
|
finally
|
872
|
{
|
873
|
try
|
874
|
{
|
875
|
pstmt.close();
|
876
|
}//try
|
877
|
catch (SQLException ee)
|
878
|
{
|
879
|
MetaCatUtil.debugMessage("Error in replicationHandler.alreadyDeleted "+
|
880
|
"to close pstmt: "+ee.getMessage(), 30);
|
881
|
throw ee;
|
882
|
}//catch
|
883
|
finally
|
884
|
{
|
885
|
DBConnectionPool.returnDBConnection(dbConn, serialNumber);
|
886
|
}//finally
|
887
|
}//finally
|
888
|
return false;
|
889
|
}
|
890
|
|
891
|
|
892
|
/**
|
893
|
* Method to initialize the message parser
|
894
|
*/
|
895
|
public static XMLReader initParser(DefaultHandler dh)
|
896
|
throws Exception
|
897
|
{
|
898
|
XMLReader parser = null;
|
899
|
|
900
|
try {
|
901
|
ContentHandler chandler = dh;
|
902
|
|
903
|
// Get an instance of the parser
|
904
|
MetaCatUtil util = new MetaCatUtil();
|
905
|
String parserName = util.getOption("saxparser");
|
906
|
parser = XMLReaderFactory.createXMLReader(parserName);
|
907
|
|
908
|
// Turn off validation
|
909
|
parser.setFeature("http://xml.org/sax/features/validation", false);
|
910
|
|
911
|
parser.setContentHandler((ContentHandler)chandler);
|
912
|
parser.setErrorHandler((ErrorHandler)chandler);
|
913
|
|
914
|
} catch (Exception e) {
|
915
|
throw e;
|
916
|
}
|
917
|
|
918
|
return parser;
|
919
|
}
|
920
|
|
921
|
/**
|
922
|
* This method will combinate given time string(in short format) to
|
923
|
* current date. If the given time (e.g 10:00 AM) passed the current time
|
924
|
* (e.g 2:00 PM Aug 21, 2005), then the time will set to second day,
|
925
|
* 10:00 AM Aug 22, 2005. If the given time (e.g 10:00 AM) haven't passed
|
926
|
* the current time (e.g 8:00 AM Aug 21, 2005) The time will set to be
|
927
|
* 10:00 AM Aug 21, 2005.
|
928
|
* @param givenTime the format should be "10:00 AM " or "2:00 PM"
|
929
|
* @return
|
930
|
* @throws Exception
|
931
|
*/
|
932
|
public static Date combinateCurrentDateAndGivenTime(String givenTime) throws Exception
|
933
|
{
|
934
|
Date givenDate = parseTime(givenTime);
|
935
|
Date newDate = null;
|
936
|
Date now = new Date();
|
937
|
String currentTimeString = getTimeString(now);
|
938
|
Date currentTime = parseTime(currentTimeString);
|
939
|
if ( currentTime.getTime() >= givenDate.getTime())
|
940
|
{
|
941
|
MetaCatUtil.debugMessage("Today already pass the given time, we should set it as tomorrow", 30);
|
942
|
String dateAndTime = getDateString(now) + " " + givenTime;
|
943
|
Date combinationDate = parseDateTime(dateAndTime);
|
944
|
// new date should plus 24 hours to make is the second day
|
945
|
newDate = new Date(combinationDate.getTime()+24*3600*1000);
|
946
|
}
|
947
|
else
|
948
|
{
|
949
|
MetaCatUtil.debugMessage("Today haven't pass the given time, we should it as today", 2);
|
950
|
String dateAndTime = getDateString(now) + " " + givenTime;
|
951
|
newDate = parseDateTime(dateAndTime);
|
952
|
}
|
953
|
MetaCatUtil.debugMessage("final setting time is "+ newDate.toString(), 20);
|
954
|
return newDate;
|
955
|
}
|
956
|
|
957
|
/*
|
958
|
* parse a given string to Time in short format.
|
959
|
* For example, given time is 10:00 AM, the date will be return as
|
960
|
* Jan 1 1970, 10:00 AM
|
961
|
*/
|
962
|
private static Date parseTime(String timeString) throws Exception
|
963
|
{
|
964
|
DateFormat format = DateFormat.getTimeInstance(DateFormat.SHORT);
|
965
|
Date time = format.parse(timeString);
|
966
|
System.out.println("Date string is after parse a time string "+time.toString());
|
967
|
return time;
|
968
|
|
969
|
}
|
970
|
|
971
|
/*
|
972
|
* Pasre a given string to date and time. Date format is long and time
|
973
|
* format is short.
|
974
|
*/
|
975
|
private static Date parseDateTime(String timeString) throws Exception
|
976
|
{
|
977
|
DateFormat format = DateFormat.getDateTimeInstance(DateFormat.LONG, DateFormat.SHORT);
|
978
|
Date time = format.parse(timeString);
|
979
|
System.out.println("Date string is after parse a time string "+time.toString());
|
980
|
return time;
|
981
|
}
|
982
|
|
983
|
/*
|
984
|
* Get a date string from a Date object. The date format will be long
|
985
|
*/
|
986
|
private static String getDateString(Date now)
|
987
|
{
|
988
|
DateFormat df = DateFormat.getDateInstance(DateFormat.LONG);
|
989
|
String s = df.format(now);
|
990
|
System.out.println("Today is " + s);
|
991
|
return s;
|
992
|
}
|
993
|
|
994
|
/*
|
995
|
* Get a time string from a Date object, the time format will be short
|
996
|
*/
|
997
|
private static String getTimeString(Date now)
|
998
|
{
|
999
|
DateFormat df = DateFormat.getTimeInstance(DateFormat.SHORT);
|
1000
|
String s = df.format(now);
|
1001
|
System.out.println("Time is " + s);
|
1002
|
return s;
|
1003
|
}
|
1004
|
}
|
1005
|
|