/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.solr.handler.admin;
import java.io.IOException;
import java.lang.management.ManagementFactory;
import java.lang.management.ThreadInfo;
import java.lang.management.ThreadMXBean;
import org.apache.solr.common.util.NamedList;
import org.apache.solr.common.util.SimpleOrderedMap;
import org.apache.solr.handler.RequestHandlerBase;
import org.apache.solr.request.SolrQueryRequest;
import org.apache.solr.response.SolrQueryResponse;
/**
* Copied from "admin/threaddump.jsp"
*
* NOTE: the response format is still likely to change. It should be designed so
* that it works nicely with an XSLT transformation. Until we have a nice
* XSLT front end for /admin, the format is still open to change.
*
* @version $Id: ThreadDumpHandler.java 1052938 2010-12-26 20:21:48Z rmuir $
* @since solr 1.2
*/
public class ThreadDumpHandler extends RequestHandlerBase
{
@Override
public void handleRequestBody(SolrQueryRequest req, SolrQueryResponse rsp) throws IOException
{
SimpleOrderedMap<Object> system = new SimpleOrderedMap<Object>();
rsp.add( "system", system );
ThreadMXBean tmbean = ManagementFactory.getThreadMXBean();
// Thread Count
SimpleOrderedMap<Object> nl = new SimpleOrderedMap<Object>();
nl.add( "current",tmbean.getThreadCount() );
nl.add( "peak", tmbean.getPeakThreadCount() );
nl.add( "daemon", tmbean.getDaemonThreadCount() );
system.add( "threadCount", nl );
// Deadlocks
ThreadInfo[] tinfos;
long[] tids = tmbean.findMonitorDeadlockedThreads();
if (tids != null) {
tinfos = tmbean.getThreadInfo(tids, Integer.MAX_VALUE);
NamedList<SimpleOrderedMap<Object>> lst = new NamedList<SimpleOrderedMap<Object>>();
for (ThreadInfo ti : tinfos) {
lst.add( "thread", getThreadInfo( ti, tmbean ) );
}
system.add( "deadlocks", lst );
}
// Now show all the threads....
tids = tmbean.getAllThreadIds();
tinfos = tmbean.getThreadInfo(tids, Integer.MAX_VALUE);
NamedList<SimpleOrderedMap<Object>> lst = new NamedList<SimpleOrderedMap<Object>>();
for (ThreadInfo ti : tinfos) {
lst.add( "thread", getThreadInfo( ti, tmbean ) );
}
system.add( "threadDump", lst );
rsp.setHttpCaching(false);
}
//--------------------------------------------------------------------------------
//--------------------------------------------------------------------------------
private static SimpleOrderedMap<Object> getThreadInfo( ThreadInfo ti, ThreadMXBean tmbean ) throws IOException
{
SimpleOrderedMap<Object> info = new SimpleOrderedMap<Object>();
long tid = ti.getThreadId();
info.add( "id", tid );
info.add( "name", ti.getThreadName() );
info.add( "state", ti.getThreadState().toString() );
if (ti.getLockName() != null) {
info.add( "lock", ti.getLockName() );
}
if (ti.isSuspended()) {
info.add( "suspended", true );
}
if (ti.isInNative()) {
info.add( "native", true );
}
if (tmbean.isThreadCpuTimeSupported()) {
info.add( "cpuTime", formatNanos(tmbean.getThreadCpuTime(tid)) );
info.add( "userTime", formatNanos(tmbean.getThreadUserTime(tid)) );
}
if (ti.getLockOwnerName() != null) {
SimpleOrderedMap<Object> owner = new SimpleOrderedMap<Object>();
owner.add( "name", ti.getLockOwnerName() );
owner.add( "id", ti.getLockOwnerId() );
}
// Add the stack trace
int i=0;
String[] trace = new String[ti.getStackTrace().length];
for( StackTraceElement ste : ti.getStackTrace()) {
trace[i++] = ste.toString();
}
info.add( "stackTrace", trace );
return info;
}
private static String formatNanos(long ns) {
return String.format("%.4fms", ns / (double) 1000000);
}
//////////////////////// SolrInfoMBeans methods //////////////////////
@Override
public String getDescription() {
return "Thread Dump";
}
@Override
public String getVersion() {
return "$Revision: 1052938 $";
}
@Override
public String getSourceId() {
return "$Id: ThreadDumpHandler.java 1052938 2010-12-26 20:21:48Z rmuir $";
}
@Override
public String getSource() {
return "$URL: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene_solr_3_5/solr/core/src/java/org/apache/solr/handler/admin/ThreadDumpHandler.java $";
}
}