Source Code Cross Referenced for TimeableEventQueue.java in  » IDE-Netbeans » library » org » netbeans » core » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » IDE Netbeans » library » org.netbeans.core 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
003:         * 
004:         * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
005:         * 
006:         * The contents of this file are subject to the terms of either the GNU
007:         * General Public License Version 2 only ("GPL") or the Common
008:         * Development and Distribution License("CDDL") (collectively, the
009:         * "License"). You may not use this file except in compliance with the
010:         * License. You can obtain a copy of the License at
011:         * http://www.netbeans.org/cddl-gplv2.html
012:         * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
013:         * specific language governing permissions and limitations under the
014:         * License.  When distributing the software, include this License Header
015:         * Notice in each file and include the License file at
016:         * nbbuild/licenses/CDDL-GPL-2-CP.  Sun designates this
017:         * particular file as subject to the "Classpath" exception as provided
018:         * by Sun in the GPL Version 2 section of the License file that
019:         * accompanied this code. If applicable, add the following below the
020:         * License Header, with the fields enclosed by brackets [] replaced by
021:         * your own identifying information:
022:         * "Portions Copyrighted [year] [name of copyright owner]"
023:         * 
024:         * If you wish your version of this file to be governed by only the CDDL
025:         * or only the GPL Version 2, indicate your decision by adding
026:         * "[Contributor] elects to include this software in this distribution
027:         * under the [CDDL or GPL Version 2] license." If you do not indicate a
028:         * single choice of license, a recipient has the option to distribute
029:         * your version of this file under either the CDDL, the GPL Version 2 or
030:         * to extend the choice of license to its licensees as provided above.
031:         * However, if you add GPL Version 2 code and therefore, elected the GPL
032:         * Version 2 license, then the option applies only if the new code is
033:         * made subject to such option by the copyright holder.
034:         * 
035:         * Contributor(s):
036:         * 
037:         * Portions Copyrighted 2008 Sun Microsystems, Inc.
038:         */
039:
040:        package org.netbeans.core;
041:
042:        import java.awt.AWTEvent;
043:        import java.awt.EventQueue;
044:        import java.awt.Toolkit;
045:        import java.util.EmptyStackException;
046:        import java.util.Map;
047:        import java.util.ResourceBundle;
048:        import java.util.logging.Level;
049:        import java.util.logging.LogRecord;
050:        import java.util.logging.Logger;
051:        import org.netbeans.core.startup.Main;
052:        import org.openide.util.Mutex;
053:        import org.openide.util.RequestProcessor;
054:
055:        /**
056:         * Logging event queue that can report problems about too long execution times
057:         * 
058:         * 
059:         * @author Jaroslav Tulach <jaroslav.tulach@netbeans.org>
060:         */
061:        final class TimeableEventQueue extends EventQueue implements  Runnable {
062:            private static final Logger LOG = Logger
063:                    .getLogger(TimeableEventQueue.class.getName());
064:            private static final RequestProcessor RP = new RequestProcessor(
065:                    "Timeable Event Queue Watch Dog", 1, true); // NOI18N
066:            private static final int QUANTUM = Integer.getInteger(
067:                    "org.netbeans.core.TimeableEventQueue.quantum", 5000); // NOI18N
068:            private static final int PAUSE = Integer.getInteger(
069:                    "org.netbeans.core.TimeableEventQueue.pause", 60000); // NOI18N
070:
071:            private final RequestProcessor.Task TIMEOUT;
072:            private volatile Map<Thread, StackTraceElement[]> stack;
073:            private volatile long ignoreTill;
074:            private volatile long start;
075:
076:            public TimeableEventQueue() {
077:                TIMEOUT = RP.create(this );
078:                TIMEOUT.setPriority(Thread.MIN_PRIORITY);
079:            }
080:
081:            static void initialize() {
082:                // #28536: make sure a JRE bug does not prevent the event queue from having
083:                // the right context class loader
084:                // and #35470: do it early, before any module-loaded AWT code might run
085:                // and #36820: even that isn't always early enough, so we need to push
086:                // a new EQ to enforce the context loader
087:                // XXX this is a hack!
088:                try {
089:                    Mutex.EVENT.writeAccess(new Mutex.Action<Void>() {
090:                        public Void run() {
091:                            Thread.currentThread().setContextClassLoader(
092:                                    Main.getModuleSystem().getManager()
093:                                            .getClassLoader());
094:                            Toolkit.getDefaultToolkit().getSystemEventQueue()
095:                                    .push(new TimeableEventQueue());
096:                            LOG.fine("Initialization done");
097:                            return null;
098:                        }
099:                    });
100:                } catch (Exception e) {
101:                    e.printStackTrace();
102:                }
103:            }
104:
105:            @Override
106:            protected void dispatchEvent(AWTEvent event) {
107:                try {
108:                    tick();
109:                    super .dispatchEvent(event);
110:                } finally {
111:                    done();
112:                }
113:            }
114:
115:            @Override
116:            public AWTEvent getNextEvent() throws InterruptedException {
117:                try {
118:                    tick();
119:                    return super .getNextEvent();
120:                } finally {
121:                    done();
122:                }
123:            }
124:
125:            @Override
126:            public synchronized AWTEvent peekEvent() {
127:                try {
128:                    tick();
129:                    return super .peekEvent();
130:                } finally {
131:                    done();
132:                }
133:            }
134:
135:            @Override
136:            public synchronized AWTEvent peekEvent(int id) {
137:                try {
138:                    tick();
139:                    return super .peekEvent(id);
140:                } finally {
141:                    done();
142:                }
143:            }
144:
145:            @Override
146:            protected void pop() throws EmptyStackException {
147:                try {
148:                    tick();
149:                    super .pop();
150:                } finally {
151:                    done();
152:                }
153:            }
154:
155:            @Override
156:            public void postEvent(AWTEvent theEvent) {
157:                try {
158:                    tick();
159:                    super .postEvent(theEvent);
160:                } finally {
161:                    done();
162:                }
163:            }
164:
165:            @Override
166:            public synchronized void push(EventQueue newEventQueue) {
167:                try {
168:                    tick();
169:                    super .push(newEventQueue);
170:                } finally {
171:                    done();
172:                }
173:            }
174:
175:            private void done() {
176:                stack = null;
177:                TIMEOUT.cancel();
178:                long time = System.currentTimeMillis() - start;
179:                if (time > 50) {
180:                    LOG.log(Level.FINE, "done, timer stopped, took {0}", time);
181:                } else {
182:                    LOG
183:                            .log(Level.FINEST, "done, timer stopped, took {0}",
184:                                    time);
185:                }
186:            }
187:
188:            private void tick() {
189:                stack = null;
190:                start = System.currentTimeMillis();
191:                if (start >= ignoreTill) {
192:                    LOG.log(Level.FINEST, "tick, schedule a timer at {0}",
193:                            start);
194:                    TIMEOUT.schedule(QUANTUM);
195:                }
196:            }
197:
198:            public void run() {
199:                stack = Thread.getAllStackTraces();
200:                LOG.log(Level.FINER, "timer running");
201:                for (int i = 0; i < 10; i++) {
202:                    if (Thread.interrupted()) {
203:                        LOG.log(Level.FINER, "timer cancelled");
204:                        return;
205:                    }
206:                    Thread.yield();
207:                    System.gc();
208:                    System.runFinalization();
209:                }
210:                final Map<Thread, StackTraceElement[]> myStack = stack;
211:                if (myStack == null) {
212:                    LOG.log(Level.FINER, "timer cancelled");
213:                    return;
214:                }
215:
216:                long now = System.currentTimeMillis();
217:                ignoreTill = now + PAUSE;
218:                long howLong = now - start;
219:
220:                //        Logger UI_LOG = Logger.getLogger("org.netbeans.ui.performance"); // NOI18N
221:                LogRecord rec = new LogRecord(Level.INFO,
222:                        "LOG_EventQueueBlocked"); // NOI18N
223:                rec.setParameters(new Object[] { howLong });
224:                EQException eq = new EQException(myStack);
225:                rec.setThrown(eq);
226:                rec.setResourceBundleName("org.netbeans.core.Bundle"); // NOI18N
227:                rec.setResourceBundle(ResourceBundle
228:                        .getBundle("org.netbeans.core.Bundle")); // NOI18N
229:                //        UI_LOG.log(rec);
230:                LOG.log(rec);
231:            }
232:
233:            private static final class EQException extends Exception {
234:                private volatile Map<Thread, StackTraceElement[]> stack;
235:
236:                public EQException(Map<Thread, StackTraceElement[]> stack) {
237:                    this .stack = stack;
238:                    for (Map.Entry<Thread, StackTraceElement[]> en : stack
239:                            .entrySet()) {
240:                        if (en.getKey().getName().indexOf("AWT-EventQueue") >= 0) {
241:                            setStackTrace(en.getValue());
242:                            break;
243:                        }
244:                    }
245:                }
246:
247:                @Override
248:                public String getMessage() {
249:                    return threadDump("AWT Event Queue Thread Blocked", stack); // NOI18N
250:                }
251:
252:                private static void appendThread(StringBuilder sb,
253:                        String indent, Thread t,
254:                        Map<Thread, StackTraceElement[]> data) {
255:                    sb.append(indent).append("Thread ").append(t.getName())
256:                            .append('\n');
257:                    indent = indent.concat("  ");
258:                    StackTraceElement[] arr = data.get(t);
259:                    if (arr != null) {
260:                        for (StackTraceElement e : arr) {
261:                            sb.append(indent).append(e.getClassName()).append(
262:                                    '.').append(e.getMethodName()).append(':')
263:                                    .append(e.getLineNumber()).append('\n');
264:                        }
265:                    } else {
266:                        sb.append(indent).append("no stacktrace info"); // NOI18N
267:                    }
268:                }
269:
270:                private static void appendGroup(StringBuilder sb,
271:                        String indent, ThreadGroup tg,
272:                        Map<Thread, StackTraceElement[]> data) {
273:                    sb.append(indent).append("Group ").append(tg.getName())
274:                            .append('\n');
275:                    indent = indent.concat("  ");
276:
277:                    int groups = tg.activeGroupCount();
278:                    ThreadGroup[] chg = new ThreadGroup[groups];
279:                    tg.enumerate(chg, false);
280:                    for (ThreadGroup inner : chg) {
281:                        if (inner != null)
282:                            appendGroup(sb, indent, inner, data);
283:                    }
284:
285:                    int threads = tg.activeCount();
286:                    Thread[] cht = new Thread[threads];
287:                    tg.enumerate(cht, false);
288:                    for (Thread t : cht) {
289:                        if (t != null)
290:                            appendThread(sb, indent, t, data);
291:                    }
292:                }
293:
294:                private static String threadDump(String msg,
295:                        Map<Thread, StackTraceElement[]> all) {
296:                    ThreadGroup root = Thread.currentThread().getThreadGroup();
297:                    while (root.getParent() != null)
298:                        root = root.getParent();
299:
300:                    StringBuilder sb = new StringBuilder();
301:                    sb.append(msg).append('\n');
302:                    appendGroup(sb, "", root, all);
303:                    sb.append('\n').append("---");
304:                    return sb.toString();
305:                }
306:
307:            }
308:        }
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