[17612] | 1 | /**
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| 2 | *#########################################################################
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| 3 | *
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| 4 | * A component of the Greenstone Librarian Interface application, part of
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| 5 | * the Greenstone digital library suite from the New Zealand Digital
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| 6 | * Library Project at the University of Waikato, New Zealand.
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| 7 | *
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| 8 | * Author: Michael Dewsnip, NZDL Project, University of Waikato
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| 9 | *
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| 10 | * Copyright (C) 2005 New Zealand Digital Library Project
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or modify
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| 13 | * it under the terms of the GNU General Public License as published by
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| 14 | * the Free Software Foundation; either version 2 of the License, or
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| 15 | * (at your option) any later version.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful,
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| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 20 | * GNU General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, write to the Free Software
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| 24 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 25 | *########################################################################
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| 26 | */
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| 27 |
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| 28 | package org.greenstone.gatherer.remote;
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| 29 |
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| 30 | import java.io.*;
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| 31 | import java.net.*;
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| 32 | import java.util.*;
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| 33 | import java.util.zip.*;
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| 34 | import javax.swing.*;
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| 35 | import org.greenstone.gatherer.Configuration;
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| 36 | import org.greenstone.gatherer.DebugStream;
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| 37 | import org.greenstone.gatherer.Dictionary;
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| 38 | import org.greenstone.gatherer.FedoraInfo;
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| 39 | import org.greenstone.gatherer.GAuthenticator;
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| 40 | import org.greenstone.gatherer.Gatherer;
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| 41 | import org.greenstone.gatherer.collection.CollectionManager;
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| 42 | import org.greenstone.gatherer.shell.GShell;
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| 43 | import org.greenstone.gatherer.util.UnzipTools;
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| 44 | import org.greenstone.gatherer.util.Utility;
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| 45 | import org.apache.commons.httpclient.HttpClient;
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| 46 | import org.apache.commons.httpclient.methods.PostMethod;
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| 47 | import org.apache.commons.httpclient.methods.GetMethod;
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| 48 | import org.apache.commons.httpclient.HttpException;
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| 49 | import org.apache.commons.httpclient.methods.multipart.FilePart;
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| 50 | import org.apache.commons.httpclient.methods.multipart.MultipartRequestEntity;
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| 51 | import org.apache.commons.httpclient.methods.multipart.Part;
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| 52 | import org.apache.commons.httpclient.methods.multipart.*;
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| 53 | import org.apache.commons.httpclient.params.*;
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| 54 | import org.apache.commons.httpclient.HttpStatus;
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| 55 |
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| 56 | // ----------------------------------------------------------------------------------------------------
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| 57 | // Part of the RemoteGreenstoneServer's QUEUE LAYER
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| 58 | // ----------------------------------------------------------------------------------------------------
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| 59 |
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| 60 | // Moved here. Previously called RemoteGreenstoneServerActionQueue
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| 61 | /**
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| 62 | * A Thread that maintains a queue of RemoteGreenstoneServer Actions
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| 63 | * that are to be executed in FIFO fashion.
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| 64 | */
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| 65 | class ActionQueue extends Thread
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| 66 | {
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| 67 | /** The queue of waiting jobs. */
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| 68 | private ArrayList queue = null;
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[17630] | 69 | private boolean exited;
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| 70 |
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[17612] | 71 | public ActionQueue()
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| 72 | {
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[17630] | 73 | super("RemoteGreenstoneServerActionQueue");
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| 74 | exited = false;
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[17612] | 75 | if (Gatherer.isGsdlRemote) {
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| 76 | queue = new ArrayList();
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| 77 | start();
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| 78 | }
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| 79 | }
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| 80 |
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| 81 |
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| 82 | synchronized public void addAction(RemoteGreenstoneServerAction remote_greenstone_server_action)
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| 83 | {
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| 84 | queue.add(remote_greenstone_server_action);
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| 85 | notifyAll();
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| 86 | }
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| 87 |
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| 88 |
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[17630] | 89 | synchronized public int size()
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[17612] | 90 | {
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| 91 | return queue.size();
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| 92 | }
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| 93 |
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[17630] | 94 | synchronized public RemoteGreenstoneServerAction getAction(int i)
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| 95 | {
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| 96 | return (RemoteGreenstoneServerAction)queue.get(i);
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| 97 | }
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| 98 |
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| 99 | synchronized public boolean hasExited() {
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| 100 | return exited;
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| 101 | }
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[17612] | 102 |
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[17630] | 103 | synchronized public void clear() {
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| 104 | queue.clear();
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| 105 | }
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| 106 |
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[17612] | 107 | public void run()
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| 108 | {
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| 109 | boolean exit = false;
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[17630] | 110 |
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[17612] | 111 | while (!exit) {
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[17630] | 112 | RemoteGreenstoneServerAction remote_greenstone_server_action = null;
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| 113 |
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| 114 | // Wait until we are notify()ed by addAction that there is a new job on the queue
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| 115 | try {
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[18684] | 116 | if(Gatherer.remoteGreenstoneServer != null) {
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| 117 | Gatherer.remoteGreenstoneServer.getProgressBar().setAction(null);
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| 118 | }
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[17630] | 119 | synchronized (this) {
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| 120 | while(queue.size() <= 0) {
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| 121 | wait(); // wait for queue size to become > 0, which is done by external thread (performAction())
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[17612] | 122 | }
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[17630] | 123 | // Now there is at least one job on the queue, get the next in line and process it
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| 124 | remote_greenstone_server_action = (RemoteGreenstoneServerAction) queue.get(0); //getAction(0) is already synchronized
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[17612] | 125 | }
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[17630] | 126 | } catch (InterruptedException exception) {
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| 127 | // It may be that GLI is exiting if we get here
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| 128 | exit = true;
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| 129 | }
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| 130 |
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| 131 | if(exit) {
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| 132 | break;
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| 133 | }
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| 134 |
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| 135 | try {
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| 136 | remote_greenstone_server_action.perform();
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| 137 |
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| 138 | // No exceptions were thrown, so the action was successful
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| 139 | remote_greenstone_server_action.processed_successfully = true;
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| 140 | }
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| 141 | catch (RemoteGreenstoneServerAction.ActionCancelledException exception) {
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| 142 | remote_greenstone_server_action.processed_successfully = false;
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| 143 | }
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| 144 | catch(java.net.ConnectException exception) {
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| 145 | if(exception.getMessage().trim().startsWith("Connection refused")) {
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[17612] | 146 | exit = true;
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[17630] | 147 | } else {
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[17612] | 148 | DebugStream.printStackTrace(exception);
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| 149 | }
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[17630] | 150 | JOptionPane.showMessageDialog(Gatherer.g_man, Dictionary.get("RemoteGreenstoneServer.Error", exception.getMessage()), Dictionary.get("RemoteGreenstoneServer.Error_Title"), JOptionPane.ERROR_MESSAGE);
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| 151 | remote_greenstone_server_action.processed_successfully = false;
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[17612] | 152 | }
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[17630] | 153 | catch (FileNotFoundException exception) {
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| 154 | // FileNotFoundException happens when there's no GS server at the user-provided
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| 155 | // url (the address of gliserver.pl is wrong).
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| 156 | exit = true;
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| 157 | DebugStream.printStackTrace(exception);
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| 158 | JOptionPane.showMessageDialog(Gatherer.g_man,
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| 159 | Dictionary.get("RemoteGreenstoneServer.Error",
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| 160 | "No gliserver.pl found. " + exception.getMessage()),
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| 161 | Dictionary.get("RemoteGreenstoneServer.Error_Title"),
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| 162 | JOptionPane.ERROR_MESSAGE);
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| 163 | remote_greenstone_server_action.processed_successfully = false;
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| 164 | }
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| 165 | catch (Exception exception) {
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| 166 | DebugStream.printStackTrace(exception);
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| 167 | JOptionPane.showMessageDialog(Gatherer.g_man, Dictionary.get("RemoteGreenstoneServer.Error", exception.getMessage()), Dictionary.get("RemoteGreenstoneServer.Error_Title"), JOptionPane.ERROR_MESSAGE);
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| 168 | remote_greenstone_server_action.processed_successfully = false;
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| 169 | }
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[17612] | 170 |
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[17630] | 171 | // We're done with this action, for better or worse
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| 172 | try {
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| 173 | remote_greenstone_server_action.processed = true;
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| 174 | synchronized(remote_greenstone_server_action) {
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| 175 | remote_greenstone_server_action.notifyAll(); // notifies RemoteGreenstoneServer.performAction()
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[17612] | 176 | }
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[17630] | 177 | } catch (Exception exception) {
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| 178 | System.err.println("RemoteGreenstoneServerActionQueue.run() - exception: " + exception);
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[17612] | 179 | }
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[17630] | 180 | synchronized (this) { // remove the action just processed from the queue, since it's done.
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| 181 | queue.remove(0);
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| 182 | }
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[17612] | 183 | }
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[17630] | 184 |
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| 185 | // Out of while, means exit = true
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| 186 | // Stop the gazillion annoying error messages when the connection was simply
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| 187 | // refused or when the user pressed Cancel in the opening dialog, by clearing
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| 188 | // the action queue of subsequent actions and setting exited to true.
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| 189 | synchronized(this) {
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| 190 | queue.clear();
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| 191 | exited = true;
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| 192 | }
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[17612] | 193 | }
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| 194 | } |
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