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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2013 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:
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* only the GPL Version 2, indicate your decision by adding "[Contributor]
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*/
package com.sun.enterprise.universal.process;
import java.io.OutputStream;
import java.util.Map;
import java.util.Set;
import static com.sun.enterprise.universal.process.ProcessUtils.jstackExe;
/**
* Provide a Jstack getDump of a given PID -- or a concatenated getDump of ALL
* running JVMs.
*
* @author Byron Nevins
*/
public class Jstack {
private static final Set> set;
public static void main(String[] args) {
System.out.println("** Got " + set.size() + " process entries");
if (args.length > 0) {
int pid = Integer.parseInt(args[0]);
boolean legal = Jps.isPid(Integer.parseInt(args[0]));
System.out.printf("Jps.isPid(%s) ==> %b%n", args[0], legal);
getDump(pid);
}
else {
for (Map.Entry e : set) {
System.out.printf("%d %s%n", e.getKey(), e.getValue());
}
System.out.println(getDump());
System.out.println("XXXXX");
}
}
public static String getDump() {
StringBuilder sb = new StringBuilder();
for (Map.Entry e : set) {
int pid = e.getKey();
sb.append(prepend(pid, e.getValue()));
sb.append(getDump(pid));
}
return sb.toString();
}
public static String getDump(int pid) {
try {
if (jstackExe == null) {
return "";
}
ProcessManager pm = new ProcessManager(jstackExe.getPath(), "-l", "" + pid);
pm.setEcho(false);
pm.execute();
return pm.getStdout();
}
catch (Exception e) {
return "";
}
}
private static String prepend(int pid, String name) {
return "------- DUMPING JSTACK FOR PID= " + pid + ", name = " + name + " -------\n";
}
static {
set = Jps.getProcessTable().entrySet();
}
}