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Micro Distribution of the Payara Project for IBM JDK
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 1997-2012 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
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* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
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* holder.
*/
/*
* ThreadMonitor.java
*
* Created on July 21, 2005, 11:50 AM
*/
package com.sun.enterprise.v3.admin.commands;
import com.sun.enterprise.util.i18n.StringManager;
import java.lang.management.ManagementFactory;
import java.lang.management.RuntimeMXBean;
import java.lang.management.ThreadInfo;
import java.lang.management.ThreadMXBean;
import java.lang.reflect.Method;
import java.math.BigInteger;
import java.util.Arrays;
import javax.management.MBeanServerConnection;
/**
*/
class ThreadMonitor {
private final MBeanServerConnection mbsc;
private final StringManager sm = StringManager.getManager(ThreadMonitor.class);
private static final BigInteger S2NANOS = new BigInteger("" + 1000000000);
public ThreadMonitor(final MBeanServerConnection mbsc) {
this.mbsc = mbsc;
}
public final String getThreadDump() {
//final long start = System.currentTimeMillis();
final StringBuilder sb = new StringBuilder();
final StringBuilderNewLineAppender td = new StringBuilderNewLineAppender(sb);
try {
final ThreadMXBean tmx = ManagementFactory.newPlatformMXBeanProxy(mbsc, ManagementFactory.THREAD_MXBEAN_NAME, ThreadMXBean.class);
final String title = getTitle();
td.append(title);
td.append(sm.getString("thread.no", tmx.getThreadCount()));
td.append(sm.getString("daemon.thread.no", tmx.getDaemonThreadCount()));
td.append(sm.getString("peak.thread.no", tmx.getPeakThreadCount()));
boolean tc = (tmx.isThreadContentionMonitoringSupported()) ? true : false;
td.append(sm.getString("thread.contention.monitoring.supported", tc));
boolean tce = (tmx.isThreadContentionMonitoringEnabled()) ? true : false;
td.append(sm.getString("thread.contention.monitoring.enabled", tce));
boolean cputs = (tmx.isThreadCpuTimeSupported()) ? true : false;
td.append(sm.getString("thread.cputime.supported", cputs));
boolean cpute = (tmx.isThreadCpuTimeEnabled()) ? true : false;
td.append(sm.getString("thread.cputime.enabled", cpute));
final long[] tids = tmx.getAllThreadIds();
final ThreadInfo[] tinfos = tmx.getThreadInfo(tids, Integer.MAX_VALUE);
/*
Arrays.sort(tinfos, new Comparator () {
public int compare(ThreadInfo a, ThreadInfo b) {
return ( a.getThreadName().compareTo(b.getThreadName()) );
}
});
*/
for (final ThreadInfo ti : tinfos) {
td.append(dumpThread(tmx, ti));
}
sb.append(getDeadlockInfo(tmx));
return ( td.toString() );
} catch(final Exception e) {
throw new RuntimeException(e);
}
/*finally {
final long end = System.currentTimeMillis();
final double time = (end/1000.0) - (start/1000.0);
//logger.info("Time in seconds to get the jvm thread dump: " + time);
}*/
}
private String dumpThread(ThreadMXBean tmx, ThreadInfo ti) {
String msg = "--------------------------------------------------------------------------------";
final StringBuilder sb = new StringBuilder(msg).append(StringBuilderNewLineAppender.SEP);
sb.append(sm.getString("execution.info")).append(StringBuilderNewLineAppender.SEP);
sb.append("-----------------------").append(StringBuilderNewLineAppender.SEP);
final long ids = ti.getThreadId();
final String ss = ti.getThreadState().toString();
msg = sm.getString("thread.title", quote(ti.getThreadName()), ids, ss);
sb.append(msg);
if (ti.getLockName() != null) {
msg = sm.getString("thread.waiting.on", ti.getLockName());
sb.append(" " + msg);
}
if (ti.isSuspended()) {
msg = sm.getString("thread.suspended");
sb.append(" " + msg);
}
if (ti.isInNative()) {
msg = sm.getString("thread.in.native");
sb.append(" " + msg);
}
sb.append(StringBuilderNewLineAppender.SEP);
for (final StackTraceElement ste : ti.getStackTrace()) {
msg = sm.getString("thread.stack.element", ste.toString());
sb.append(msg);
sb.append(StringBuilderNewLineAppender.SEP);
}
msg = sm.getString("sync.info");
sb.append(msg).append(StringBuilderNewLineAppender.SEP);
sb.append("-----------------------").append(StringBuilderNewLineAppender.SEP);
if (ti.getLockOwnerName() != null) {
msg = sm.getString("lock.owner.details", ti.getLockOwnerName(), ti.getLockOwnerId());
sb.append(msg).append(StringBuilderNewLineAppender.SEP);
}
msg = sm.getString("thread.blocked.times", ti.getBlockedCount());
sb.append(msg).append(StringBuilderNewLineAppender.SEP);
long bt = ti.getBlockedTime();
if (bt != -1) { //if bt == -1 thread contention monitoring is not enabled, reported above
msg = sm.getString("thread.blocked.totaltime", bt);
sb.append(msg).append(StringBuilderNewLineAppender.SEP);
}
long wt = ti.getWaitedCount();
msg = sm.getString("wait.times", wt);
sb.append(msg).append(StringBuilderNewLineAppender.SEP);
boolean tcput = tmx.isThreadCpuTimeEnabled() ? true : false;
if (tcput) {
long cput = tmx.getThreadCpuTime(ti.getThreadId());
if (cput != -1) {
BigInteger[] times = new BigInteger(cput + "").divideAndRemainder(S2NANOS);
msg = sm.getString("thread.total.cpu.time", times[0], times[1]);
sb.append(msg).append(StringBuilderNewLineAppender.SEP);
}
long user = tmx.getThreadUserTime(ti.getThreadId());
if (user != -1) {
BigInteger[] times = new BigInteger(cput + "").divideAndRemainder(S2NANOS);
msg = sm.getString("thread.cpu.user.time", times[0], times[1]);
sb.append(msg).append(StringBuilderNewLineAppender.SEP);
}
}
msg = sm.getString("lock.owner.details", ti.getLockOwnerName(), ti.getLockOwnerId());
msg = getMoreThreadInfo(ti, "getLockedMonitors");
sb.append(sm.getString("monitor.info", msg)).append(StringBuilderNewLineAppender.SEP);
msg = getMoreThreadInfo(ti, "getLockedSynchronizers");
sb.append(sm.getString("ownable.sync.info", msg));
return ( sb.toString() );
}
private String getTitle() throws Exception {
final RuntimeMXBean rt = ManagementFactory.newPlatformMXBeanProxy(mbsc, ManagementFactory.RUNTIME_MXBEAN_NAME, RuntimeMXBean.class);
final String vmname = rt.getVmName();
final String vmversion = rt.getVmVersion();
final String vmvendor = rt.getVmVendor();
final String title = sm.getString("td.title", vmname, vmversion, vmvendor);
return ( title );
}
private String quote(final String uq) {
final StringBuilder sb = new StringBuilder("\"");
sb.append(uq).append("\"");
return ( sb.toString() );
}
private String getDeadlockInfo(final ThreadMXBean tmx) {
final StringBuilderNewLineAppender sb = new StringBuilderNewLineAppender(new StringBuilder());
final long[] dts = tmx.findMonitorDeadlockedThreads();
if (dts == null) {
sb.append(sm.getString("no.deadlock"));
}
else {
sb.append(sm.getString("deadlocks.found"));
for (final long dt : dts) {
final ThreadInfo ti = tmx.getThreadInfo(dt);
sb.append(this.dumpThread(tmx, ti));
}
}
return ( sb.toString() );
}
private String getMoreThreadInfo(ThreadInfo ti, String mn) {
String ms = "";
try {
Method glmm = ti.getClass().getDeclaredMethod(mn, (Class[])null);
Object monitors = glmm.invoke(ti, (Object[])null);
if (monitors instanceof Object[]) {
return ( Arrays.toString((Object[])monitors) );
} else {
return (NA);
}
} catch(Exception e) {
return (NA);
}
}
public static final String NA = "NOT_AVAILABLE";
}
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