/*
|
* CDDL HEADER START
|
*
|
* The contents of this file are subject to the terms of the
|
* Common Development and Distribution License, Version 1.0 only
|
* (the "License"). You may not use this file except in compliance
|
* with the License.
|
*
|
* You can obtain a copy of the license at
|
* trunk/opends/resource/legal-notices/OpenDS.LICENSE
|
* or https://OpenDS.dev.java.net/OpenDS.LICENSE.
|
* See the License for the specific language governing permissions
|
* and limitations under the License.
|
*
|
* When distributing Covered Code, include this CDDL HEADER in each
|
* file and include the License file at
|
* trunk/opends/resource/legal-notices/OpenDS.LICENSE. If applicable,
|
* add the following below this CDDL HEADER, with the fields enclosed
|
* by brackets "[]" replaced with your own identifying information:
|
* Portions Copyright [yyyy] [name of copyright owner]
|
*
|
* CDDL HEADER END
|
*
|
*
|
* Copyright 2006-2008 Sun Microsystems, Inc.
|
*/
|
package org.opends.server.monitors;
|
|
|
|
import java.util.ArrayList;
|
import java.util.Map;
|
import java.util.TreeMap;
|
|
import org.opends.server.admin.std.server.StackTraceMonitorProviderCfg;
|
import org.opends.server.api.MonitorProvider;
|
import org.opends.server.config.ConfigException;
|
import org.opends.server.core.DirectoryServer;
|
import org.opends.server.types.*;
|
|
|
/**
|
* This class defines a Directory Server monitor provider that can be used to
|
* obtain a stack trace from all server threads that are currently defined in
|
* the JVM.
|
*/
|
public class StackTraceMonitorProvider
|
extends MonitorProvider<StackTraceMonitorProviderCfg>
|
{
|
/**
|
* Initializes this monitor provider.
|
*/
|
public StackTraceMonitorProvider()
|
{
|
super("Stack Trace Monitor Provider");
|
|
// No initialization should be performed here.
|
}
|
|
|
|
/**
|
* {@inheritDoc}
|
*/
|
public void initializeMonitorProvider(
|
StackTraceMonitorProviderCfg configuration)
|
throws ConfigException, InitializationException
|
{
|
// No initialization is required.
|
}
|
|
|
|
/**
|
* Retrieves the name of this monitor provider. It should be unique among all
|
* monitor providers, including all instances of the same monitor provider.
|
*
|
* @return The name of this monitor provider.
|
*/
|
public String getMonitorInstanceName()
|
{
|
return "JVM Stack Trace";
|
}
|
|
|
|
/**
|
* Retrieves the length of time in milliseconds that should elapse between
|
* calls to the <CODE>updateMonitorData()</CODE> method. A negative or zero
|
* return value indicates that the <CODE>updateMonitorData()</CODE> method
|
* should not be periodically invoked.
|
*
|
* @return The length of time in milliseconds that should elapse between
|
* calls to the <CODE>updateMonitorData()</CODE> method.
|
*/
|
public long getUpdateInterval()
|
{
|
// This monitor does not need to run periodically.
|
return 0;
|
}
|
|
|
|
/**
|
* Performs any processing periodic processing that may be desired to update
|
* the information associated with this monitor. Note that best-effort
|
* attempts will be made to ensure that calls to this method come
|
* <CODE>getUpdateInterval()</CODE> milliseconds apart, but no guarantees will
|
* be made.
|
*/
|
public void updateMonitorData()
|
{
|
// This monitor does not need to run periodically.
|
return;
|
}
|
|
|
|
/**
|
* Retrieves a set of attributes containing monitor data that should be
|
* returned to the client if the corresponding monitor entry is requested.
|
*
|
* @return A set of attributes containing monitor data that should be
|
* returned to the client if the corresponding monitor entry is
|
* requested.
|
*/
|
public ArrayList<Attribute> getMonitorData()
|
{
|
Map<Thread,StackTraceElement[]> threadStacks = Thread.getAllStackTraces();
|
|
|
// Re-arrange all of the elements by thread ID so that there is some logical
|
// order.
|
TreeMap<Long,Map.Entry<Thread,StackTraceElement[]>> orderedStacks =
|
new TreeMap<Long,Map.Entry<Thread,StackTraceElement[]>>();
|
for (Map.Entry<Thread,StackTraceElement[]> e : threadStacks.entrySet())
|
{
|
orderedStacks.put(e.getKey().getId(), e);
|
}
|
|
|
AttributeType attrType =
|
DirectoryServer.getDefaultAttributeType("jvmThread");
|
AttributeBuilder builder = new AttributeBuilder(attrType);
|
for (Map.Entry<Thread,StackTraceElement[]> e : orderedStacks.values())
|
{
|
Thread t = e.getKey();
|
StackTraceElement[] stackElements = e.getValue();
|
|
long id = t.getId();
|
|
StringBuilder buffer = new StringBuilder();
|
buffer.append("id=");
|
buffer.append(id);
|
buffer.append(" ---------- ");
|
buffer.append(t.getName());
|
buffer.append(" ----------");
|
builder.add(AttributeValues.create(attrType, buffer.toString()));
|
|
// Create an attribute for the stack trace.
|
if (stackElements != null)
|
{
|
for (int j=0; j < stackElements.length; j++)
|
{
|
buffer = new StringBuilder();
|
buffer.append("id=");
|
buffer.append(id);
|
buffer.append(" frame[");
|
buffer.append(j);
|
buffer.append("]=");
|
|
buffer.append(stackElements[j].getClassName());
|
buffer.append(".");
|
buffer.append(stackElements[j].getMethodName());
|
buffer.append("(");
|
buffer.append(stackElements[j].getFileName());
|
buffer.append(":");
|
if (stackElements[j].isNativeMethod())
|
{
|
buffer.append("native");
|
}
|
else
|
{
|
buffer.append(stackElements[j].getLineNumber());
|
}
|
buffer.append(")");
|
|
builder.add(AttributeValues.create(attrType, buffer.toString()));
|
}
|
}
|
}
|
|
ArrayList<Attribute> attrs = new ArrayList<Attribute>();
|
attrs.add(builder.toAttribute());
|
|
return attrs;
|
}
|
}
|
