/*
* 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.model.ThreadStackElement;
import com.googlecode.psiprobe.tools.JmxTools;
import java.util.ArrayList;
import java.util.List;
import javax.management.MBeanServer;
import javax.management.ObjectName;
import javax.management.openmbean.CompositeData;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.modeler.Registry;
import org.springframework.web.bind.ServletRequestUtils;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.ParameterizableViewController;
public class ThreadStackController extends ParameterizableViewController {
private int stackElementCount = 20;
public int getStackElementCount() {
return stackElementCount;
}
public void setStackElementCount(int stackElementCount) {
this.stackElementCount = stackElementCount;
}
protected ModelAndView handleRequestInternal(HttpServletRequest request, HttpServletResponse response) throws Exception {
long threadID = ServletRequestUtils.getLongParameter(request, "id", -1);
String threadName = ServletRequestUtils.getStringParameter(request, "name", null);
List stack = null;
MBeanServer mBeanServer = new Registry().getMBeanServer();
ObjectName threadingOName = new ObjectName("java.lang:type=Threading");
if (threadID == -1 && threadName != null) {
// find thread by name
long[] allIds = (long[]) mBeanServer.getAttribute(threadingOName, "AllThreadIds");
for (int i = 0; i < allIds.length; i++) {
CompositeData cd = (CompositeData) mBeanServer.invoke(threadingOName, "getThreadInfo",
new Object[]{new Long(allIds[i])}, new String[] {"long"});
String name = JmxTools.getStringAttr(cd, "threadName");
if (threadName.equals(name)) {
threadID = allIds[i];
break;
}
}
}
if (mBeanServer.queryMBeans(threadingOName, null) != null && threadID != -1) {
CompositeData cd = (CompositeData) mBeanServer.invoke(threadingOName, "getThreadInfo",
new Object[]{new Long(threadID), new Integer(stackElementCount)}, new String[] {"long", "int"});
if (cd != null) {
CompositeData[] elements = (CompositeData[]) cd.get("stackTrace");
threadName = JmxTools.getStringAttr(cd, "threadName");
stack = new ArrayList(elements.length);
for (int i = 0; i < elements.length; i++) {
CompositeData cd2 = elements[i];
ThreadStackElement tse = new ThreadStackElement();
tse.setClassName(JmxTools.getStringAttr(cd2, "className"));
tse.setFileName(JmxTools.getStringAttr(cd2, "fileName"));
tse.setMethodName(JmxTools.getStringAttr(cd2, "methodName"));
tse.setLineNumber(JmxTools.getIntAttr(cd2, "lineNumber", -1));
tse.setNativeMethod(JmxTools.getBooleanAttr(cd2, "nativeMethod"));
stack.add(tse);
}
}
}
return new ModelAndView(getViewName(), "stack", stack).addObject("threadName", threadName);
}
}