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/**
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* '$RCSfile$'
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* Purpose: A Class that implements database configuration methods
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* Copyright: 2008 Regents of the University of California and the
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* National Center for Ecological Analysis and Synthesis
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* Authors: Michael Daigle
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*
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* '$Author: leinfelder $'
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* '$Date: 2012-08-03 14:27:10 -0700 (Fri, 03 Aug 2012) $'
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* '$Revision: 7346 $'
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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.admin;
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import java.io.IOException;
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import java.io.PrintWriter;
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import java.util.Enumeration;
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import java.util.Hashtable;
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import java.util.Vector;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import javax.servlet.http.HttpSession;
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import org.apache.log4j.Logger;
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import edu.ucsb.nceas.metacat.dataone.hazelcast.HazelcastService;
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import edu.ucsb.nceas.metacat.replication.ReplicationService;
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import edu.ucsb.nceas.metacat.service.SessionService;
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import edu.ucsb.nceas.metacat.shared.MetacatUtilException;
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import edu.ucsb.nceas.metacat.shared.ServiceException;
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import edu.ucsb.nceas.metacat.util.AuthUtil;
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import edu.ucsb.nceas.metacat.util.RequestUtil;
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import edu.ucsb.nceas.metacat.util.SessionData;
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/**
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* Control the display of the database configuration page and the processing
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* of the configuration values.
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*/
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public class ReplicationAdmin extends MetacatAdmin {
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private static ReplicationAdmin instance = null;
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private Logger logMetacat = Logger.getLogger(ReplicationAdmin.class);
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/**
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* private constructor since this is a singleton
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*/
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private ReplicationAdmin() throws AdminException {
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}
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/**
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* Get the single instance of D1Admin.
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*
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* @return the single instance of D1Admin
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*/
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public static ReplicationAdmin getInstance() throws AdminException {
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if (instance == null) {
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instance = new ReplicationAdmin();
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}
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return instance;
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}
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/**
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* Handle configuration of replication -- pass through to the other handler
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*
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* @param request
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* the http request information
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* @param response
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* the http response to be sent back to the client
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* @throws ServiceException
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* @throws IOException
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* @throws MetacatUtilException
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*/
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public void handleRequest(HttpServletRequest request,
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HttpServletResponse response) throws AdminException, ServiceException, IOException, MetacatUtilException {
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PrintWriter out = null;
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Hashtable<String, String[]> params = new Hashtable<String, String[]>();
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Enumeration<String> paramlist = request.getParameterNames();
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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 = "";
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if (!params.isEmpty() && params.get("action") != null) {
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action = ((String[]) params.get("action"))[0];
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}
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// start, stop, getall and servercontrol need to check if user is administrator
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HttpSession session = request.getSession(true);
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SessionData sessionData = null;
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String sessionId = "";
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String username = "";
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String[] groupnames = { "" };
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if (params.containsKey("sessionid")) {
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sessionId = ((String[]) params.get("sessionid"))[0];
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logMetacat.info("sessionid " + sessionId);
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if (SessionService.getInstance().isSessionRegistered(sessionId)) {
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logMetacat.info("Looking up id " + sessionId + " in registered sessions");
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sessionData = SessionService.getInstance().getRegisteredSession(sessionId);
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}
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}
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if (sessionData == null) {
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sessionData = new SessionData(session.getId(),
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(String) session.getAttribute("username"),
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(String[]) session.getAttribute("groups"),
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(String) session.getAttribute("password"),
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(String) session.getAttribute("name"));
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}
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username = sessionData.getUserName();
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logMetacat.warn("The user name from session is: " + username);
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groupnames = sessionData.getGroupNames();
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if (!AuthUtil.isAdministrator(username, groupnames)) {
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String msg = "The user \"" + username
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+ "\" is not authorized for this action: " + action;
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out = response.getWriter();
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out.print("<error>");
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out.print(msg);
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out.print("</error>");
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out.close();
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logMetacat.warn(msg);
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return;
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}
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if (action.equals("stop")) {
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// stop the replication server
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ReplicationService.getInstance().stopReplication();
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out = response.getWriter();
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out.println("Replication Handler Stopped");
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} else if (action.equals("start")) {
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ReplicationService.getInstance().startReplication(params);
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out = response.getWriter();
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out.println("Replication Handler Started");
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} else if (action.equals("getall")) {
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ReplicationService.getInstance().runOnce();
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response.setContentType("text/html");
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out = response.getWriter();
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out.println("<html><body>\"Get All\" Done</body></html>");
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} else if (action.equals("servercontrol")) {
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ReplicationService.handleServerControlRequest(params, request, response);
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} else if (action.equals("resynchSystemMetadata")) {
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HazelcastService.getInstance().resynchInThread();
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response.setContentType("text/html");
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out = response.getWriter();
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out.println("<html><body>SystemMetadata resynch has been started</body></html>");
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} else {
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// Forward the request to the JSP page
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RequestUtil.forwardRequest(request, response, "/admin/replication-configuration.jsp", null);
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}
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}
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/**
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* Validate the most important configuration options submitted by the user.
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*
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* @return a vector holding error message for any fields that fail
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* validation.
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*/
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protected Vector<String> validateOptions(HttpServletRequest request) {
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Vector<String> errorVector = new Vector<String>();
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// TODO MCD validate options.
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return errorVector;
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}
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}
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