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- /*
- * Copyright (c) 2007, Kirill Grouchnikov
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * - Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- * - Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- * - Neither the name of the <ORGANIZATION> nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
- package com.dmdirc.addons.ui_swing;
-
- import java.awt.AWTEvent;
- import java.lang.management.ManagementFactory;
- import java.lang.management.ThreadInfo;
- import java.lang.management.ThreadMXBean;
- import java.util.HashMap;
- import java.util.Map;
- import java.util.Set;
-
- import javax.management.MBeanServer;
- import javax.management.ObjectName;
-
- /**
- * Event queue extention to monitor long running tasks on the EDT. Found at
- * http://today.java.net/lpt/a/433
- */
- class TracingEventQueueThread extends Thread {
-
- private long thresholdDelay;
- private Map<AWTEvent, Long> eventTimeMap;
- private ThreadMXBean threadBean;
-
- /**
- * Instantiates a new tracing thread.
- *
- * @param thresholdDelay Length to consider a long running task
- */
- public TracingEventQueueThread(long thresholdDelay) {
- this.thresholdDelay = thresholdDelay;
- this.eventTimeMap = new HashMap<AWTEvent, Long>();
-
- try {
- MBeanServer mbeanServer = ManagementFactory.getPlatformMBeanServer();
- ObjectName objName = new ObjectName(
- ManagementFactory.THREAD_MXBEAN_NAME);
- Set<ObjectName> mbeans = mbeanServer.queryNames(objName, null);
- for (ObjectName name : mbeans) {
- this.threadBean = ManagementFactory.newPlatformMXBeanProxy(
- mbeanServer, name.toString(), ThreadMXBean.class);
- }
- } catch (Exception e) {
- e.printStackTrace();
- }
- }
-
- /**
- * Marks the start time for the specified event.
- *
- * @param event Event to monitor
- */
- public synchronized void eventDispatched(AWTEvent event) {
- this.eventTimeMap.put(event, System.currentTimeMillis());
- }
-
- /**
- * Marks the end time for the specified event.
- *
- * @param event Event to finish monitoring.
- */
- public synchronized void eventProcessed(AWTEvent event) {
- this.checkEventTime(event, System.currentTimeMillis(),
- this.eventTimeMap.get(event));
- this.eventTimeMap.put(event, null);
- }
-
- private void checkEventTime(AWTEvent event, long currTime, long startTime) {
- long currProcessingTime = currTime - startTime;
- if (currProcessingTime >= this.thresholdDelay) {
- System.out.println("Event [" + event.hashCode() + "] " + event.
- getClass().getName() + " is taking too much time on EDT (" +
- currProcessingTime + ")");
-
- if (this.threadBean != null) {
- long threadIds[] = threadBean.getAllThreadIds();
- for (long threadId : threadIds) {
- ThreadInfo threadInfo = threadBean.getThreadInfo(threadId,
- Integer.MAX_VALUE);
- if (threadInfo != null && threadInfo.getThreadName().
- startsWith("AWT-EventQueue")) {
- System.out.println(threadInfo.getThreadName() + " / " +
- threadInfo.getThreadState());
- StackTraceElement[] stack = threadInfo.getStackTrace();
- for (StackTraceElement stackEntry : stack) {
- System.out.println("\t" + stackEntry.getClassName() +
- "." + stackEntry.getMethodName() + " [" +
- stackEntry.getLineNumber() + "]");
- }
- }
- }
-
- long[] deadlockedThreads = threadBean.findDeadlockedThreads();
- if ((deadlockedThreads != null) &&
- (deadlockedThreads.length > 0)) {
- System.out.println("Deadlocked threads:");
- for (long threadId : deadlockedThreads) {
- ThreadInfo threadInfo = threadBean.getThreadInfo(
- threadId, Integer.MAX_VALUE);
- System.out.println(threadInfo.getThreadName() + " / " +
- threadInfo.getThreadState());
- StackTraceElement[] stack = threadInfo.getStackTrace();
- for (StackTraceElement stackEntry : stack) {
- System.out.println("\t" + stackEntry.getClassName() +
- "." + stackEntry.getMethodName() + " [" +
- stackEntry.getLineNumber() + "]");
- }
- }
- }
- }
- }
- }
-
- /** {@inheritDoc} */
- @Override
- public void run() {
- while (true) {
- long currTime = System.currentTimeMillis();
- synchronized (this) {
- for (Map.Entry<AWTEvent, Long> entry : this.eventTimeMap.
- entrySet()) {
- AWTEvent event = entry.getKey();
- if (entry.getValue() == null) {
- continue;
- }
- long startTime = entry.getValue();
- this.checkEventTime(event, currTime, startTime);
- }
- }
- try {
- Thread.sleep(100);
- } catch (InterruptedException ie) {
- }
- }
- }
- }
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