Examples with ThreadMXBean java.lang.management.ThreadMXBean used on opensource projects

Example 21 with ThreadMXBean

use of java.lang.management.ThreadMXBean in project hazelcast by hazelcast.

the class ThreadMetricSet method register.

/**
     * Registers all the metrics in this metric pack.
     *
     * @param metricsRegistry the MetricsRegistry upon which the metrics are registered.
     */
public static void register(MetricsRegistry metricsRegistry) {
    checkNotNull(metricsRegistry, "metricsRegistry");
    ThreadMXBean mxBean = ManagementFactory.getThreadMXBean();
    metricsRegistry.register(mxBean, "thread.threadCount", MANDATORY, new LongProbeFunction<ThreadMXBean>() {

        @Override
        public long get(ThreadMXBean threadMXBean) {
            return threadMXBean.getThreadCount();
        }
    });
    metricsRegistry.register(mxBean, "thread.peakThreadCount", MANDATORY, new LongProbeFunction<ThreadMXBean>() {

        @Override
        public long get(ThreadMXBean threadMXBean) {
            return threadMXBean.getPeakThreadCount();
        }
    });
    metricsRegistry.register(mxBean, "thread.daemonThreadCount", MANDATORY, new LongProbeFunction<ThreadMXBean>() {

        @Override
        public long get(ThreadMXBean threadMXBean) {
            return threadMXBean.getDaemonThreadCount();
        }
    });
    metricsRegistry.register(mxBean, "thread.totalStartedThreadCount", MANDATORY, new LongProbeFunction<ThreadMXBean>() {

        @Override
        public long get(ThreadMXBean threadMXBean) {
            return threadMXBean.getTotalStartedThreadCount();
        }
    });
}

Example 22 with ThreadMXBean

use of java.lang.management.ThreadMXBean in project gocd by gocd.

the class DaemonThreadStatsCollector method captureStats.

public void captureStats(long threadId) {
    ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
    long threadCpuTime = threadMXBean.getThreadCpuTime(threadId);
    cpuInfoConcurrentHashMap.put(threadId, new Info(threadCpuTime, UUID.randomUUID().toString()));
}

Example 23 with ThreadMXBean

use of java.lang.management.ThreadMXBean in project gocd by gocd.

the class DaemonThreadStatsCollector method statsFor.

public Map<String, Object> statsFor(long threadId) {
    if (!cpuInfoConcurrentHashMap.containsKey(threadId)) {
        return null;
    }
    ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
    long end = threadMXBean.getThreadCpuTime(threadId);
    Info info = cpuInfoConcurrentHashMap.get(threadId);
    Long start = info.time;
    HashMap<String, Object> map = new HashMap<>();
    map.put("CPUTime(nanoseconds)", end - start);
    map.put("UUID", info.uuid);
    return map;
}

Example 24 with ThreadMXBean

use of java.lang.management.ThreadMXBean in project jdk8u_jdk by JetBrains.

the class TestThread method waitUntilBlockingOnObject.

/**
     * Waits until {@link TestThread} is in the certain {@link State}
     * and blocking on {@code object}.
     *
     * @param state The thread state
     * @param object The object to block on
     */
public void waitUntilBlockingOnObject(Thread.State state, Object object) {
    String want = object == null ? null : object.getClass().getName() + '@' + Integer.toHexString(System.identityHashCode(object));
    ThreadMXBean tmx = ManagementFactory.getThreadMXBean();
    while (isAlive()) {
        ThreadInfo ti = tmx.getThreadInfo(getId());
        if (ti.getThreadState() == state && (want == null || want.equals(ti.getLockName()))) {
            return;
        }
        try {
            Thread.sleep(1);
        } catch (InterruptedException e) {
        }
    }
}

Example 25 with ThreadMXBean

use of java.lang.management.ThreadMXBean in project jdk8u_jdk by JetBrains.

the class InvalidThreadID method main.

public static void main(String[] argv) {
    ThreadMXBean mbean = ManagementFactory.getThreadMXBean();
    int cnt = 0;
    long[] idArr = { 0, -1, -2, (Long.MIN_VALUE + 1), Long.MIN_VALUE };
    if (mbean.isThreadCpuTimeSupported()) {
        for (int i = 0; i < idArr.length; i++) {
            try {
                mbean.getThreadCpuTime(idArr[i]);
                System.out.println("Test failed. IllegalArgumentException" + " expected for ID = " + idArr[i]);
            } catch (IllegalArgumentException iae) {
                cnt++;
            }
        }
        if (cnt != idArr.length) {
            throw new RuntimeException("Unexpected number of " + "IllegalArgumentException = " + cnt + " expected = " + idArr.length);
        }
        // CPU time for a non-existence thread
        long time = mbean.getThreadCpuTime(999999);
        if (time < 0 && time != -1) {
            throw new RuntimeException("Cpu time for thread 999999" + " is invalid = " + time + " expected to be -1.");
        }
    }
    System.out.println("Test passed.");
}