svn-gvsig-desktop / trunk / libraries / libRemoteServices / src / org / gvsig / remoteClient / taskplanning / retrieving / RetrieveQueue.java @ 5230
History | View | Annotate | Download (2.38 KB)
| 1 |
/*
|
|---|---|
| 2 |
* Created on 01-oct-2005
|
| 3 |
*/
|
| 4 |
package org.gvsig.remoteClient.taskplanning.retrieving; |
| 5 |
|
| 6 |
import java.util.Date; |
| 7 |
import java.util.Vector; |
| 8 |
|
| 9 |
import org.gvsig.remoteClient.taskplanning.FIFOTaskPlanner; |
| 10 |
import org.gvsig.remoteClient.taskplanning.IQueue; |
| 11 |
import org.gvsig.remoteClient.taskplanning.IRunnableTask; |
| 12 |
import org.gvsig.remoteClient.taskplanning.ITaskPlanner; |
| 13 |
|
| 14 |
/**
|
| 15 |
* @author jaume dominguez faus - jaume.dominguez@iver.es
|
| 16 |
* Luis W. Sevilla (sevilla_lui@gva.es)
|
| 17 |
*/
|
| 18 |
public class RetrieveQueue implements IQueue { |
| 19 |
private String hostName; |
| 20 |
private Date startTime; |
| 21 |
private Vector tasks = new Vector(); |
| 22 |
private boolean waiting; |
| 23 |
private ITaskPlanner taskPlanner;
|
| 24 |
private Worker worker;
|
| 25 |
|
| 26 |
/**
|
| 27 |
*
|
| 28 |
*/
|
| 29 |
public RetrieveQueue(String hName) { |
| 30 |
hostName = hName; |
| 31 |
startTime = new Date(); |
| 32 |
worker = new Worker();
|
| 33 |
new Thread(worker).start(); |
| 34 |
} |
| 35 |
|
| 36 |
|
| 37 |
public IRunnableTask put(IRunnableTask task) {
|
| 38 |
tasks.add(task); |
| 39 |
if (waiting) {
|
| 40 |
synchronized (this) { |
| 41 |
notifyAll(); |
| 42 |
} |
| 43 |
} |
| 44 |
return task;
|
| 45 |
} |
| 46 |
|
| 47 |
public IRunnableTask take() {
|
| 48 |
if (tasks.isEmpty()) {
|
| 49 |
synchronized (this) { |
| 50 |
waiting = true;
|
| 51 |
try {
|
| 52 |
wait(); |
| 53 |
} catch (InterruptedException ie) { |
| 54 |
waiting = false;
|
| 55 |
} |
| 56 |
} |
| 57 |
} |
| 58 |
return getTaskPlanner().nextTask() ;
|
| 59 |
} |
| 60 |
|
| 61 |
|
| 62 |
|
| 63 |
public boolean isEmpty() { |
| 64 |
synchronized (this) { |
| 65 |
return tasks.isEmpty() && !worker.r.isRunning();
|
| 66 |
} |
| 67 |
} |
| 68 |
|
| 69 |
|
| 70 |
|
| 71 |
public ITaskPlanner getTaskPlanner() {
|
| 72 |
if (taskPlanner == null) { |
| 73 |
taskPlanner = new FIFOTaskPlanner(this); |
| 74 |
} |
| 75 |
return taskPlanner;
|
| 76 |
} |
| 77 |
|
| 78 |
|
| 79 |
public void setTaskPlanner(ITaskPlanner planner) { |
| 80 |
taskPlanner = planner; |
| 81 |
} |
| 82 |
|
| 83 |
|
| 84 |
public void pause() { |
| 85 |
waiting = true;
|
| 86 |
} |
| 87 |
|
| 88 |
|
| 89 |
public void resume() { |
| 90 |
waiting = false;
|
| 91 |
} |
| 92 |
|
| 93 |
|
| 94 |
public Vector getTasks() { |
| 95 |
return tasks;
|
| 96 |
} |
| 97 |
|
| 98 |
private class Worker implements Runnable { |
| 99 |
URLRetrieveTask r; |
| 100 |
int i = 0; |
| 101 |
public void run() { |
| 102 |
while (true) { |
| 103 |
r = (URLRetrieveTask) take(); |
| 104 |
r.execute(); |
| 105 |
} |
| 106 |
} |
| 107 |
} |
| 108 |
|
| 109 |
|
| 110 |
|
| 111 |
|
| 112 |
protected URLRetrieveTask getURLPreviousRequest(URLRequest request) {
|
| 113 |
// Is the one currently running?
|
| 114 |
/*URLRetrieveTask aux = (URLRetrieveTask) worker.r;
|
| 115 |
if (request.equals(aux.getRequest())) {
|
| 116 |
return aux;
|
| 117 |
}*/
|
| 118 |
// Is one of those in the queue?
|
| 119 |
for (int i = 0; i < tasks.size(); i++) { |
| 120 |
URLRetrieveTask task = (URLRetrieveTask) tasks.get(i); |
| 121 |
URLRequest aWorkingRequest = task.getRequest(); |
| 122 |
if (aWorkingRequest.equals(request)) {
|
| 123 |
return task;
|
| 124 |
} |
| 125 |
} |
| 126 |
return null; |
| 127 |
} |
| 128 |
} |