svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.remoteclient / src / main / java / org / gvsig / remoteclient / taskplanning / retrieving / RetrieveQueue.java @ 40769
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/**
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* gvSIG. Desktop Geographic Information System.
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*
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* Copyright (C) 2007-2013 gvSIG Association.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 3
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* of the License, or (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., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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* For any additional information, do not hesitate to contact us
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* at info AT gvsig.com, or visit our website www.gvsig.com.
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*/
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package org.gvsig.remoteclient.taskplanning.retrieving; |
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import java.util.Date; |
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import java.util.Vector; |
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import org.gvsig.remoteclient.taskplanning.FIFOTaskPlanner; |
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import org.gvsig.remoteclient.taskplanning.IQueue; |
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import org.gvsig.remoteclient.taskplanning.IRunnableTask; |
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import org.gvsig.remoteclient.taskplanning.ITaskPlanner; |
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/**
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* @author jaume dominguez faus - jaume.dominguez@iver.es
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* Luis W. Sevilla (sevilla_lui@gva.es)
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*/
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public class RetrieveQueue implements IQueue { |
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private String hostName; |
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private Date startTime; |
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private Vector tasks = new Vector(); |
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private boolean waiting; |
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private ITaskPlanner taskPlanner;
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private Worker worker;
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/**
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*
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*/
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public RetrieveQueue(String hName) { |
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hostName = hName; |
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startTime = new Date(); |
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worker = new Worker();
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new Thread(worker).start(); |
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} |
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public IRunnableTask put(IRunnableTask task) {
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tasks.add(task); |
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if (waiting) {
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synchronized (this) { |
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notifyAll(); |
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} |
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} |
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return task;
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} |
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public IRunnableTask take() {
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if (tasks.isEmpty()) {
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synchronized (this) { |
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waiting = true;
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try {
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wait(); |
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} catch (InterruptedException ie) { |
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waiting = false;
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} |
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} |
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} |
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return getTaskPlanner().nextTask() ;
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} |
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public boolean isEmpty() { |
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synchronized (this) { |
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return tasks.isEmpty() && !worker.r.isRunning();
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} |
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} |
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public ITaskPlanner getTaskPlanner() {
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if (taskPlanner == null) { |
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taskPlanner = new FIFOTaskPlanner(this); |
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} |
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return taskPlanner;
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} |
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public void setTaskPlanner(ITaskPlanner planner) { |
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taskPlanner = planner; |
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} |
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public void pause() { |
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waiting = true;
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} |
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public void resume() { |
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waiting = false;
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} |
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public Vector getTasks() { |
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return tasks;
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} |
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private class Worker implements Runnable { |
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URLRetrieveTask r; |
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int i = 0; |
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public void run() { |
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while (true) { |
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r = (URLRetrieveTask) take(); |
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r.execute(); |
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} |
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} |
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} |
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protected URLRetrieveTask getURLPreviousRequest(URLRequest request) {
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// Is the one currently running?
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/*URLRetrieveTask aux = (URLRetrieveTask) worker.r;
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if (request.equals(aux.getRequest())) {
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return aux;
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}*/
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// Is one of those in the queue?
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for (int i = 0; i < tasks.size(); i++) { |
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URLRetrieveTask task = (URLRetrieveTask) tasks.get(i); |
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URLRequest aWorkingRequest = task.getRequest(); |
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if (aWorkingRequest.equals(request)) {
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return task;
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} |
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} |
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return null; |
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} |
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} |