Example usage for java.lang.management ThreadInfo getLockedMonitors

Introduction

In this page you can find the example usage for java.lang.management ThreadInfo getLockedMonitors.

Prototype

public MonitorInfo[] getLockedMonitors() 

Source Link

Document

Returns an array of MonitorInfo objects, each of which represents an object monitor currently locked by the thread associated with this ThreadInfo .

Usage

From source file:password.pwm.util.java.JavaHelper.java

/**
 * Copy of {@link ThreadInfo#toString()} but with the MAX_FRAMES changed from 8 to 256.
 *///from w  w w  . j  a  v  a2  s . c  om
public static String threadInfoToString(final ThreadInfo threadInfo) {
    final int MAX_FRAMES = 256;
    final StringBuilder sb = new StringBuilder("\"" + threadInfo.getThreadName() + "\"" + " Id="
            + threadInfo.getThreadId() + " " + threadInfo.getThreadState());
    if (threadInfo.getLockName() != null) {
        sb.append(" on " + threadInfo.getLockName());
    }
    if (threadInfo.getLockOwnerName() != null) {
        sb.append(" owned by \"" + threadInfo.getLockOwnerName() + "\" Id=" + threadInfo.getLockOwnerId());
    }
    if (threadInfo.isSuspended()) {
        sb.append(" (suspended)");
    }
    if (threadInfo.isInNative()) {
        sb.append(" (in native)");
    }
    sb.append('\n');

    int counter = 0;
    for (; counter < threadInfo.getStackTrace().length && counter < MAX_FRAMES; counter++) {
        final StackTraceElement ste = threadInfo.getStackTrace()[counter];
        sb.append("\tat ").append(ste.toString());
        sb.append('\n');
        if (counter == 0 && threadInfo.getLockInfo() != null) {
            final Thread.State ts = threadInfo.getThreadState();
            switch (ts) {
            case BLOCKED:
                sb.append("\t-  blocked on " + threadInfo.getLockInfo());
                sb.append('\n');
                break;
            case WAITING:
                sb.append("\t-  waiting on " + threadInfo.getLockInfo());
                sb.append('\n');
                break;
            case TIMED_WAITING:
                sb.append("\t-  waiting on " + threadInfo.getLockInfo());
                sb.append('\n');
                break;
            default:
            }
        }

        for (MonitorInfo mi : threadInfo.getLockedMonitors()) {
            if (mi.getLockedStackDepth() == counter) {
                sb.append("\t-  locked " + mi);
                sb.append('\n');
            }
        }
    }
    if (counter < threadInfo.getStackTrace().length) {
        sb.append("\t...");
        sb.append('\n');
    }

    final LockInfo[] locks = threadInfo.getLockedSynchronizers();
    if (locks.length > 0) {
        sb.append("\n\tNumber of locked synchronizers = " + locks.length);
        sb.append('\n');
        for (LockInfo li : locks) {
            sb.append("\t- " + li);
            sb.append('\n');
        }
    }
    sb.append('\n');
    return sb.toString();
}

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From source file:hudson.Functions.java

@IgnoreJRERequirement
public static String dumpThreadInfo(ThreadInfo ti) {
    StringBuilder sb = new StringBuilder(
            "\"" + ti.getThreadName() + "\"" + " Id=" + ti.getThreadId() + " " + ti.getThreadState());
    if (ti.getLockName() != null) {
        sb.append(" on " + ti.getLockName());
    }//  w  w w.  java  2  s  .  c  o  m
    if (ti.getLockOwnerName() != null) {
        sb.append(" owned by \"" + ti.getLockOwnerName() + "\" Id=" + ti.getLockOwnerId());
    }
    if (ti.isSuspended()) {
        sb.append(" (suspended)");
    }
    if (ti.isInNative()) {
        sb.append(" (in native)");
    }
    sb.append('\n');
    StackTraceElement[] stackTrace = ti.getStackTrace();
    for (int i = 0; i < stackTrace.length; i++) {
        StackTraceElement ste = stackTrace[i];
        sb.append("\tat " + ste.toString());
        sb.append('\n');
        if (i == 0 && ti.getLockInfo() != null) {
            Thread.State ts = ti.getThreadState();
            switch (ts) {
            case BLOCKED:
                sb.append("\t-  blocked on " + ti.getLockInfo());
                sb.append('\n');
                break;
            case WAITING:
                sb.append("\t-  waiting on " + ti.getLockInfo());
                sb.append('\n');
                break;
            case TIMED_WAITING:
                sb.append("\t-  waiting on " + ti.getLockInfo());
                sb.append('\n');
                break;
            default:
            }
        }

        for (MonitorInfo mi : ti.getLockedMonitors()) {
            if (mi.getLockedStackDepth() == i) {
                sb.append("\t-  locked " + mi);
                sb.append('\n');
            }
        }
    }

    LockInfo[] locks = ti.getLockedSynchronizers();
    if (locks.length > 0) {
        sb.append("\n\tNumber of locked synchronizers = " + locks.length);
        sb.append('\n');
        for (LockInfo li : locks) {
            sb.append("\t- " + li);
            sb.append('\n');
        }
    }
    sb.append('\n');
    return sb.toString();
}

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From source file:com.streamsets.datacollector.bundles.content.SdcInfoContentGenerator.java

public void threadDump(BundleWriter writer) throws IOException {
    writer.markStartOfFile("runtime/threads.txt");

    ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
    ThreadInfo[] threads = threadMXBean.dumpAllThreads(true, true);

    // Sadly we can't easily do info.toString() as the implementation is hardcoded to cut the stack trace only to 8
    // items which does not serve our purpose well. Hence we have custom implementation that prints entire stack trace
    // for all threads.
    for (ThreadInfo info : threads) {
        StringBuilder sb = new StringBuilder(
                "\"" + info.getThreadName() + "\"" + " Id=" + info.getThreadId() + " " + info.getThreadState());
        if (info.getLockName() != null) {
            sb.append(" on " + info.getLockName());
        }/*  w ww . ja v a  2  s .  co m*/
        if (info.getLockOwnerName() != null) {
            sb.append(" owned by \"" + info.getLockOwnerName() + "\" Id=" + info.getLockOwnerId());
        }
        if (info.isSuspended()) {
            sb.append(" (suspended)");
        }
        if (info.isInNative()) {
            sb.append(" (in native)");
        }
        sb.append('\n');
        int i = 0;
        for (StackTraceElement ste : info.getStackTrace()) {
            if (i == 0 && info.getLockInfo() != null) {
                Thread.State ts = info.getThreadState();
                switch (ts) {
                case BLOCKED:
                    sb.append("\t-  blocked on " + info.getLockInfo());
                    sb.append('\n');
                    break;
                case WAITING:
                    sb.append("\t-  waiting on " + info.getLockInfo());
                    sb.append('\n');
                    break;
                case TIMED_WAITING:
                    sb.append("\t-  waiting on " + info.getLockInfo());
                    sb.append('\n');
                    break;
                default:
                }
            }
            sb.append("\tat " + ste.toString());
            sb.append('\n');

            i++;

            for (MonitorInfo mi : info.getLockedMonitors()) {
                if (mi.getLockedStackDepth() == i) {
                    sb.append("\t-  locked " + mi);
                    sb.append('\n');
                }
            }
        }

        LockInfo[] locks = info.getLockedSynchronizers();
        if (locks.length > 0) {
            sb.append("\n\tNumber of locked synchronizers = " + locks.length);
            sb.append('\n');
            for (LockInfo li : locks) {
                sb.append("\t- " + li);
                sb.append('\n');
            }
        }
        sb.append('\n');

        writer.write(sb.toString());
    }

    writer.markEndOfFile();
}

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