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 @ 40559
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1 | 40559 | jjdelcerro | /**
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2 | * gvSIG. Desktop Geographic Information System.
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3 | *
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4 | * Copyright (C) 2007-2013 gvSIG Association.
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5 | *
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6 | * This program is free software; you can redistribute it and/or
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7 | * modify it under the terms of the GNU General Public License
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8 | * as published by the Free Software Foundation; either version 3
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9 | * of the License, or (at your option) any later version.
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10 | *
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11 | * This program is distributed in the hope that it will be useful,
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 | * GNU General Public License for more details.
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15 | *
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16 | * You should have received a copy of the GNU General Public License
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17 | * along with this program; if not, write to the Free Software
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18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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19 | * MA 02110-1301, USA.
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20 | *
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21 | * For any additional information, do not hesitate to contact us
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22 | * at info AT gvsig.com, or visit our website www.gvsig.com.
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23 | */
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24 | 40435 | jjdelcerro | /*
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25 | * Created on 01-oct-2005
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26 | */
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27 | package org.gvsig.remoteclient.taskplanning.retrieving; |
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28 | |||
29 | import java.util.Date; |
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30 | import java.util.Vector; |
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31 | |||
32 | import org.gvsig.remoteclient.taskplanning.FIFOTaskPlanner; |
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33 | import org.gvsig.remoteclient.taskplanning.IQueue; |
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34 | import org.gvsig.remoteclient.taskplanning.IRunnableTask; |
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35 | import org.gvsig.remoteclient.taskplanning.ITaskPlanner; |
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36 | |||
37 | /**
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38 | * @author jaume dominguez faus - jaume.dominguez@iver.es
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39 | * Luis W. Sevilla (sevilla_lui@gva.es)
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40 | */
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41 | public class RetrieveQueue implements IQueue { |
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42 | private String hostName; |
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43 | private Date startTime; |
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44 | private Vector tasks = new Vector(); |
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45 | private boolean waiting; |
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46 | private ITaskPlanner taskPlanner;
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47 | private Worker worker;
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48 | |||
49 | /**
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50 | *
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51 | */
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52 | public RetrieveQueue(String hName) { |
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53 | hostName = hName; |
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54 | startTime = new Date(); |
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55 | worker = new Worker();
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56 | new Thread(worker).start(); |
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57 | } |
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58 | |||
59 | |||
60 | public IRunnableTask put(IRunnableTask task) {
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61 | tasks.add(task); |
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62 | if (waiting) {
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63 | synchronized (this) { |
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64 | notifyAll(); |
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65 | } |
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66 | } |
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67 | return task;
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68 | } |
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69 | |||
70 | public IRunnableTask take() {
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71 | if (tasks.isEmpty()) {
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72 | synchronized (this) { |
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73 | waiting = true;
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74 | try {
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75 | wait(); |
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76 | } catch (InterruptedException ie) { |
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77 | waiting = false;
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78 | } |
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79 | } |
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80 | } |
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81 | return getTaskPlanner().nextTask() ;
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82 | } |
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83 | |||
84 | |||
85 | |||
86 | public boolean isEmpty() { |
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87 | synchronized (this) { |
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88 | return tasks.isEmpty() && !worker.r.isRunning();
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89 | } |
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90 | } |
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91 | |||
92 | |||
93 | |||
94 | public ITaskPlanner getTaskPlanner() {
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95 | if (taskPlanner == null) { |
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96 | taskPlanner = new FIFOTaskPlanner(this); |
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97 | } |
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98 | return taskPlanner;
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99 | } |
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100 | |||
101 | |||
102 | public void setTaskPlanner(ITaskPlanner planner) { |
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103 | taskPlanner = planner; |
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104 | } |
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105 | |||
106 | |||
107 | public void pause() { |
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108 | waiting = true;
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109 | } |
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110 | |||
111 | |||
112 | public void resume() { |
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113 | waiting = false;
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114 | } |
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115 | |||
116 | |||
117 | public Vector getTasks() { |
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118 | return tasks;
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119 | } |
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120 | |||
121 | private class Worker implements Runnable { |
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122 | URLRetrieveTask r; |
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123 | int i = 0; |
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124 | public void run() { |
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125 | while (true) { |
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126 | r = (URLRetrieveTask) take(); |
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127 | r.execute(); |
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128 | } |
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129 | } |
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130 | } |
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131 | |||
132 | protected URLRetrieveTask getURLPreviousRequest(URLRequest request) {
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133 | // Is the one currently running?
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134 | /*URLRetrieveTask aux = (URLRetrieveTask) worker.r;
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135 | if (request.equals(aux.getRequest())) {
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136 | return aux;
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137 | }*/
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138 | // Is one of those in the queue?
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139 | for (int i = 0; i < tasks.size(); i++) { |
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140 | URLRetrieveTask task = (URLRetrieveTask) tasks.get(i); |
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141 | URLRequest aWorkingRequest = task.getRequest(); |
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142 | if (aWorkingRequest.equals(request)) {
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143 | return task;
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144 | } |
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145 | } |
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146 | return null; |
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147 | } |
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148 | } |