001: /*
002: The contents of this file are subject to the Common Public Attribution License
003: Version 1.0 (the "License"); you may not use this file except in compliance with
004: the License. You may obtain a copy of the License at
005: http://www.projity.com/license . The License is based on the Mozilla Public
006: License Version 1.1 but Sections 14 and 15 have been added to cover use of
007: software over a computer network and provide for limited attribution for the
008: Original Developer. In addition, Exhibit A has been modified to be consistent
009: with Exhibit B.
010:
011: Software distributed under the License is distributed on an "AS IS" basis,
012: WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the
013: specific language governing rights and limitations under the License. The
014: Original Code is OpenProj. The Original Developer is the Initial Developer and
015: is Projity, Inc. All portions of the code written by Projity are Copyright (c)
016: 2006, 2007. All Rights Reserved. Contributors Projity, Inc.
017:
018: Alternatively, the contents of this file may be used under the terms of the
019: Projity End-User License Agreeement (the Projity License), in which case the
020: provisions of the Projity License are applicable instead of those above. If you
021: wish to allow use of your version of this file only under the terms of the
022: Projity License and not to allow others to use your version of this file under
023: the CPAL, indicate your decision by deleting the provisions above and replace
024: them with the notice and other provisions required by the Projity License. If
025: you do not delete the provisions above, a recipient may use your version of this
026: file under either the CPAL or the Projity License.
027:
028: [NOTE: The text of this license may differ slightly from the text of the notices
029: in Exhibits A and B of the license at http://www.projity.com/license. You should
030: use the latest text at http://www.projity.com/license for your modifications.
031: You may not remove this license text from the source files.]
032:
033: Attribution Information: Attribution Copyright Notice: Copyright © 2006, 2007
034: Projity, Inc. Attribution Phrase (not exceeding 10 words): Powered by OpenProj,
035: an open source solution from Projity. Attribution URL: http://www.projity.com
036: Graphic Image as provided in the Covered Code as file: openproj_logo.png with
037: alternatives listed on http://www.projity.com/logo
038:
039: Display of Attribution Information is required in Larger Works which are defined
040: in the CPAL as a work which combines Covered Code or portions thereof with code
041: not governed by the terms of the CPAL. However, in addition to the other notice
042: obligations, all copies of the Covered Code in Executable and Source Code form
043: distributed must, as a form of attribution of the original author, include on
044: each user interface screen the "OpenProj" logo visible to all users. The
045: OpenProj logo should be located horizontally aligned with the menu bar and left
046: justified on the top left of the screen adjacent to the File menu. The logo
047: must be at least 100 x 25 pixels. When users click on the "OpenProj" logo it
048: must direct them back to http://www.projity.com.
049: */
050: package com.projity.job;
051:
052: import java.awt.Component;
053: import java.awt.Frame;
054: import java.util.Collections;
055: import java.util.EventListener;
056: import java.util.HashSet;
057: import java.util.Set;
058:
059: import javax.swing.ProgressMonitor;
060: import javax.swing.event.EventListenerList;
061:
062: import org.apache.commons.collections.Closure;
063:
064: import com.projity.util.Environment;
065:
066: /**
067: *
068: */
069: public class JobQueue extends ThreadGroup {
070: public final static int MAX_PROGRESS = 10000;
071: protected boolean documentBased = false;
072:
073: public JobQueue(String name, boolean documentBased) {
074: super (name);
075: this .documentBased = documentBased;
076: }
077:
078: public boolean hasNext() {
079: return activeCount() != 0;
080: }
081:
082: public synchronized void startNext() {
083: if (hasNext()) {
084: Thread[] threads = new Thread[1];
085: if (enumerate(threads) == 1) {
086: threads[0].start();
087: }
088: }
089: }
090:
091: public synchronized void cancel() {
092: int count = activeCount();
093: if (count == 0)
094: return;
095: Thread[] threads = new Thread[count];
096: count = enumerate(threads);
097: for (int i = 0; i < count; i++) {
098: if (threads[i] instanceof Job)
099: ((Job) threads[i]).cancel();
100: }
101: }
102:
103: private Set<String> executingJobs = Collections
104: .synchronizedSet(new HashSet<String>());
105:
106: public void addExecutingJob(Job job) {
107: executingJobs.add(job.getName());
108: }
109:
110: public void removeExecutingJob(Job job) {
111: executingJobs.remove(job.getName());
112: }
113:
114: public void schedule(Job job) {
115: if (executingJobs.contains(job.getName()))
116: return;//to avoid double click
117: job.execute();
118: }
119:
120: public ProgressMonitor getProgressMonitor(String name) {
121: if (getComponent() == null)
122: return null;
123: ProgressMonitor progressMonitor = new ProgressMonitor(
124: getComponent(), name, "", 0, MAX_PROGRESS);
125: progressMonitor.setProgress(0);
126:
127: progressMonitor.setMillisToPopup(0);
128: progressMonitor.setMillisToDecideToPopup(0);
129: //progressMonitor.setMillisToDecideToPopup(2000);
130: return progressMonitor;
131: }
132:
133: protected void enableComponent(boolean enabled) {
134: if (getComponent() == null)
135: return;
136: getComponent().setEnabled(enabled);
137: }
138:
139: protected EventListenerList queueListenerList = new EventListenerList();
140:
141: public void addListener(JobQueueListener l) {
142: queueListenerList.add(JobQueueListener.class, l);
143: }
144:
145: public void removeListener(JobQueueListener l) {
146: queueListenerList.remove(JobQueueListener.class, l);
147: }
148:
149: public JobQueueListener[] getListeners() {
150: return (JobQueueListener[]) queueListenerList
151: .getListeners(JobQueueListener.class);
152: }
153:
154: public EventListener[] getListeners(Class listenerType) {
155: return queueListenerList.getListeners(listenerType);
156: }
157:
158: protected void fireProgressChanged(Object source, float progress) {
159: Object[] listeners = queueListenerList.getListenerList();
160: JobQueueEvent e = null;
161: for (int i = listeners.length - 2; i >= 0; i -= 2) {
162: if (listeners[i] == JobQueueListener.class) {
163: if (e == null) {
164: e = new JobQueueEvent(source, progress);
165: }
166: ((JobQueueListener) listeners[i + 1])
167: .progressChanged(e);
168:
169: }
170: }
171: }
172:
173: protected Object criticalSectionMutex = new Object();
174:
175: protected Job criticalSectionOwner;
176:
177: //for free jobs (queued==false)
178: public boolean executeCriticalSectionClosure(Job job, Closure c,
179: Object arg) {
180: synchronized (criticalSectionMutex) {
181: if (criticalSectionOwner == job) {
182: c.execute(arg);
183: return true;
184: } else {
185: System.out.println(job.getName()
186: + " can execute, lost critical section");
187: return false;
188: }
189: }
190: }
191:
192: public void beginCriticalSection(Job job) {
193: synchronized (criticalSectionMutex) {
194: while (criticalSectionOwner != null
195: && criticalSectionOwner.isQueued()) {
196: try {
197: criticalSectionMutex.wait();
198: } catch (InterruptedException e) {
199: }
200: }
201: criticalSectionOwner = job;
202: job.logBegin("Critical section");
203: }
204: }
205:
206: public void endCriticalSection(Job job) {
207: synchronized (criticalSectionMutex) {
208: job.logEnd("Critical section");
209: if (criticalSectionOwner == job) {
210: criticalSectionOwner = null;
211: criticalSectionMutex.notify();
212: }
213:
214: }
215: }
216:
217: private static final String GRAPHIC_MANAGER = "com.projity.pm.graphic.frames.GraphicManager";
218:
219: public Component getComponent() {
220: if (!Environment.isVisible())
221: return null;
222: String methodName = documentBased ? "getDocumentFrameInstance"
223: : "getFrameInstance";
224: try {
225: return (Frame) Class.forName(GRAPHIC_MANAGER).getMethod(
226: methodName, null).invoke(null, null);
227: } catch (Exception e) {
228: e.printStackTrace();
229: return null;
230: }
231: }
232:
233: }
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