/*
* Licensed under the GPL License. You may not use this file except in
* compliance with the License. You may obtain a copy of the License at
*
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
*
* THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
package com.googlecode.psiprobe.controllers.threads;
import com.googlecode.psiprobe.controllers.TomcatContainerController;
import com.googlecode.psiprobe.model.java.ThreadModel;
import com.googlecode.psiprobe.tools.Instruments;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.catalina.Context;
import org.springframework.web.servlet.ModelAndView;
public class ListThreadsController extends TomcatContainerController {
protected ModelAndView handleRequestInternal(HttpServletRequest request, HttpServletResponse response) throws Exception {
//
// create a list of webapp classloaders
// this will help us to associate threads with applications.
//
List contexts = getContainerWrapper().getTomcatContainer().findContexts();
Map classLoaderMap = new TreeMap();
for (int i = 0; i < contexts.size(); i++) {
Context context = (Context) contexts.get(i);
if (context.getLoader() != null && context.getLoader().getClassLoader() != null) {
classLoaderMap.put(toUID(context.getLoader().getClassLoader()), context.getName());
}
}
return new ModelAndView(getViewName(), "threads", enumerateThreads(classLoaderMap));
}
private List enumerateThreads(final Map classLoaderMap) {
//
// get top ThreadGroup
//
ThreadGroup masterGroup = Thread.currentThread().getThreadGroup();
while (masterGroup.getParent() != null) {
masterGroup = masterGroup.getParent();
}
//
// enumerate all Threads starting from top
//
List threadList = new ArrayList();
Thread[] threads = new Thread[masterGroup.activeCount()];
int numThreads = masterGroup.enumerate(threads);
for (int i = 0; i < numThreads; i++) {
ThreadModel threadModel = new ThreadModel();
threadModel.setThreadClass(threads[i].getClass().getName());
threadModel.setName(threads[i].getName());
threadModel.setPriority(threads[i].getPriority());
threadModel.setDaemon(threads[i].isDaemon());
threadModel.setInterrupted(threads[i].isInterrupted());
if (threads[i].getThreadGroup() != null) {
threadModel.setGroupName(threads[i].getThreadGroup().getName());
}
Object target = Instruments.getField(threads[i], "target");
if (target != null) {
threadModel.setRunnableClassName(target.getClass().getName());
}
ClassLoader cl = threads[i].getContextClassLoader();
if (cl != null) {
if (classLoaderMap != null) {
threadModel.setAppName((String) classLoaderMap.get(toUID(cl)));
}
threadModel.setClassLoader(toUID(cl));
}
threadList.add(threadModel);
}
return threadList;
}
private static String toUID(Object o) {
return o.getClass().getName() + "@" + o.hashCode();
}
}