Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Apache License 

import java.lang.management.LockInfo;
import java.lang.management.ManagementFactory;
import java.lang.management.MonitorInfo;
import java.lang.management.ThreadInfo;
import java.lang.management.ThreadMXBean;
import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.List;

public class Main {
    public static String[] getStackTrace(long threadID) {
        ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
        ThreadInfo threadInfo = threadMXBean.getThreadInfo(threadID, Integer.MAX_VALUE);

        List<String> buf = new ArrayList<String>();

        if (threadInfo == null) {
            return buf.toArray((String[]) Array.newInstance(String.class, buf.size()));
        }

        StackTraceElement[] stackTrace = threadInfo.getStackTrace();
        for (int i = 0; i < stackTrace.length; i++) {
            StackTraceElement ste = stackTrace[i];
            buf.add("\t" + ste.toString());

            if (i == 0 && threadInfo.getLockInfo() != null) {
                Thread.State ts = threadInfo.getThreadState();
                switch (ts) {
                case BLOCKED:
                    buf.add("\t-  blocked on " + threadInfo.getLockInfo());
                    break;
                case WAITING:
                    buf.add("\t-  waiting on " + threadInfo.getLockInfo());
                    break;
                case TIMED_WAITING:
                    buf.add("\t-  waiting on " + threadInfo.getLockInfo());
                    break;
                default:
                }
            }

            for (MonitorInfo mi : threadInfo.getLockedMonitors()) {
                if (mi.getLockedStackDepth() == i) {
                    buf.add("\t-  locked " + mi);
                }
            }
        }

        LockInfo[] locks = threadInfo.getLockedSynchronizers();
        if (locks.length > 0) {
            buf.add("\n\tNumber of locked synchronizers = " + locks.length);
            for (LockInfo li : locks) {
                buf.add("\t- " + li);
            }
        }

        return buf.toArray((String[]) Array.newInstance(String.class, buf.size()));
    }
}