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.ManagementFactory;
import java.lang.management.ThreadInfo;
import java.lang.management.ThreadMXBean;

public class Main {
    public static String dumpThreads() {
        StringBuilder sb = new StringBuilder();
        ThreadMXBean bean = ManagementFactory.getThreadMXBean();
        long[] ids = bean.getAllThreadIds();
        _printThreads(bean, ids, sb);
        long[] deadlocks = bean.findDeadlockedThreads();
        if (deadlocks != null && deadlocks.length > 0) {
            sb.append("deadlocked threads:\n");
            _printThreads(bean, deadlocks, sb);
        }

        deadlocks = bean.findMonitorDeadlockedThreads();
        if (deadlocks != null && deadlocks.length > 0) {
            sb.append("monitor deadlocked threads:\n");
            _printThreads(bean, deadlocks, sb);
        }
        return sb.toString();
    }

    protected static void _printThreads(ThreadMXBean bean, long[] ids, StringBuilder sb) {
        ThreadInfo[] threads = bean.getThreadInfo(ids, 20);
        for (ThreadInfo info : threads) {
            if (info == null)
                continue;
            sb.append(info.getThreadName()).append(":\n");
            StackTraceElement[] stack_trace = info.getStackTrace();
            for (StackTraceElement el : stack_trace) {
                sb.append("    at ").append(el.getClassName()).append(".").append(el.getMethodName());
                sb.append("(").append(el.getFileName()).append(":").append(el.getLineNumber()).append(")");
                sb.append("\n");
            }
            sb.append("\n\n");
        }
    }
}