Package java.lang.management

Examples of java.lang.management.ThreadInfo

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        StringBuffer sb=new StringBuffer();
        ThreadMXBean bean=ManagementFactory.getThreadMXBean();
        long[] ids=bean.getAllThreadIds();
        ThreadInfo[] threads=bean.getThreadInfo(ids, 20);
        for(int i=0; i < threads.length; i++) {
            ThreadInfo info=threads[i];
            if(info == null)
                continue;
            sb.append(info.getThreadName()).append(":\n");
            StackTraceElement[] stack_trace=info.getStackTrace();
            for(int j=0; j < stack_trace.length; j++) {
                StackTraceElement el=stack_trace[j];
                sb.append("at ").append(el.getClassName()).append(".").append(el.getMethodName());
                sb.append("(").append(el.getFileName()).append(":").append(el.getLineNumber()).append(")");
                sb.append("\n");
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                .isEmpty();
    }

    @Test
    public void returnsASetOfThreadsIfAnyAreDeadlocked() throws Exception {
        final ThreadInfo thread1 = mock(ThreadInfo.class);
        when(thread1.getThreadName()).thenReturn("thread1");
        when(thread1.getLockName()).thenReturn("lock2");
        when(thread1.getLockOwnerName()).thenReturn("thread2");
        when(thread1.getStackTrace()).thenReturn(new StackTraceElement[]{
                new StackTraceElement("Blah", "bloo", "Blah.java", 150),
                new StackTraceElement("Blah", "blee", "Blah.java", 100)
        });

        final ThreadInfo thread2 = mock(ThreadInfo.class);
        when(thread2.getThreadName()).thenReturn("thread2");
        when(thread2.getLockName()).thenReturn("lock1");
        when(thread2.getLockOwnerName()).thenReturn("thread1");
        when(thread2.getStackTrace()).thenReturn(new StackTraceElement[]{
                new StackTraceElement("Blah", "blee", "Blah.java", 100),
                new StackTraceElement("Blah", "bloo", "Blah.java", 150)
        });

        final long[] ids = { 1, 2 };
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        ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
        StringBuffer b = new StringBuffer( "Thread dump\n" );
        ThreadInfo[] infos = threadMXBean.dumpAllThreads( threadMXBean.isObjectMonitorUsageSupported(), threadMXBean.isSynchronizerUsageSupported() );
        for ( int i = 0; i < infos.length; i++ )
        {
            ThreadInfo ti = infos[i];
            b.append( "\n\nThreadId: " ).append( ti.getThreadId() ).append( " : name: " ).append( ti.getThreadName() ).append( " State: " ).append( ti.getThreadState() );
            b.append( "\n  LockInfo: " ).append( ti.getLockInfo() ).append( " LockOwnerId: " ).append( ti.getLockOwnerId() ).append( " LockOwnerName: ").append( ti.getLockOwnerName() );
            StackTraceElement[] stackTrace = ti.getStackTrace();
            for (int j = 0; j < stackTrace.length; j++ )
            {
                b.append( "\n  " ).append( stackTrace[j] );
            }
        }
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        StringBuilder sb=new StringBuilder();
        ThreadMXBean bean=ManagementFactory.getThreadMXBean();
        long[] ids=bean.getAllThreadIds();
        ThreadInfo[] threads=bean.getThreadInfo(ids, 20);
        for(int i=0; i < threads.length; i++) {
            ThreadInfo info=threads[i];
            if(info == null)
                continue;
            sb.append(info.getThreadName()).append(":\n");
            StackTraceElement[] stack_trace=info.getStackTrace();
            for(int j=0; j < stack_trace.length; j++) {
                StackTraceElement el=stack_trace[j];
                sb.append("    at ").append(el.getClassName()).append(".").append(el.getMethodName());
                sb.append("(").append(el.getFileName()).append(":").append(el.getLineNumber()).append(")");
                sb.append("\n");
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                SimpleType.STRING };
        CompositeType compositeType = new CompositeType(ThreadInfo.class
                .getName(), ThreadInfo.class.getName(), names, names, types);
        CompositeData data = new CompositeDataSupport(compositeType, names,
                values);
        ThreadInfo threadInfo = ThreadInfo.from(data);
        assertEquals(values[0], threadInfo.getThreadId());
        assertEquals(values[1], threadInfo.getThreadName());
        assertEquals(GOOD_THREAD_STATE, threadInfo.getThreadState());
        assertEquals(values[3], threadInfo.isSuspended());
        assertEquals(values[4], threadInfo.isInNative());
        assertEquals(values[5], threadInfo.getBlockedCount());
        assertEquals(values[6], threadInfo.getBlockedTime());
        assertEquals(values[7], threadInfo.getWaitedCount());
        assertEquals(values[8], threadInfo.getWaitedTime());
        assertEquals(values[9], threadInfo.getLockName());
        assertEquals(values[10], threadInfo.getLockOwnerId());
        assertEquals(values[11], threadInfo.getLockOwnerName());
        StackTraceElement[] stackElements = threadInfo.getStackTrace();
        assertEquals(GOOD_STACK_SIZE, stackElements.length);
        for (StackTraceElement element : stackElements) {
            assertEquals(GOOD_STACK_CLASSNAME, element.getClassName());
            assertEquals(GOOD_STACK_NATIVEMETHOD, element.isNativeMethod());
            assertEquals(GOOD_STACK_FILENAME, element.getFileName());
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        StringBuilder sb=new StringBuilder();
        ThreadMXBean bean=ManagementFactory.getThreadMXBean();
        long[] ids=bean.getAllThreadIds();
        ThreadInfo[] threads=bean.getThreadInfo(ids, 20);
        for(int i=0; i < threads.length; i++) {
            ThreadInfo info=threads[i];
            if(info == null)
                continue;
            sb.append(info.getThreadName()).append(":\n");
            StackTraceElement[] stack_trace=info.getStackTrace();
            for(int j=0; j < stack_trace.length; j++) {
                StackTraceElement el=stack_trace[j];
                sb.append("at ").append(el.getClassName()).append(".").append(el.getMethodName());
                sb.append("(").append(el.getFileName()).append(":").append(el.getLineNumber()).append(")");
                sb.append("\n");
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        validator.validate(operation);
        ThreadMXBean mbean = ManagementFactory.getThreadMXBean();
        try {
            long id = operation.require(PlatformMBeanConstants.ID).asLong();
            ThreadInfo info = null;
            if (operation.hasDefined(PlatformMBeanConstants.MAX_DEPTH)) {
                info = mbean.getThreadInfo(id, operation.require(PlatformMBeanConstants.MAX_DEPTH).asInt());
            } else {
                info = mbean.getThreadInfo(id);
            }
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        StringBuilder sb=new StringBuilder();
        ThreadMXBean bean=ManagementFactory.getThreadMXBean();
        long[] ids=bean.getAllThreadIds();
        ThreadInfo[] threads=bean.getThreadInfo(ids, 20);
        for(int i=0; i < threads.length; i++) {
            ThreadInfo info=threads[i];
            if(info == null)
                continue;
            sb.append(info.getThreadName()).append(":\n");
            StackTraceElement[] stack_trace=info.getStackTrace();
            for(int j=0; j < stack_trace.length; j++) {
                StackTraceElement el=stack_trace[j];
                sb.append("at ").append(el.getClassName()).append(".").append(el.getMethodName());
                sb.append("(").append(el.getFileName()).append(":").append(el.getLineNumber()).append(")");
                sb.append("\n");
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        StringBuilder sb=new StringBuilder();
        ThreadMXBean bean=ManagementFactory.getThreadMXBean();
        long[] ids=bean.getAllThreadIds();
        ThreadInfo[] threads=bean.getThreadInfo(ids, 20);
        for(int i=0; i < threads.length; i++) {
            ThreadInfo info=threads[i];
            if(info == null)
                continue;
            sb.append(info.getThreadName()).append(":\n");
            StackTraceElement[] stack_trace=info.getStackTrace();
            for(int j=0; j < stack_trace.length; j++) {
                StackTraceElement el=stack_trace[j];
                sb.append("at ").append(el.getClassName()).append(".").append(el.getMethodName());
                sb.append("(").append(el.getFileName()).append(":").append(el.getLineNumber()).append(")");
                sb.append("\n");
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    boolean contention = threadBean.isThreadContentionMonitoringEnabled();
    long[] threadIds = threadBean.getAllThreadIds();
    stream.println("Process Thread Dump: Tajo Worker");
    stream.println(threadIds.length + " active threads");
    for (long tid : threadIds) {
      ThreadInfo info = threadBean.getThreadInfo(tid, STACK_DEPTH);
      if (info == null) {
        stream.println("  Inactive");
        continue;
      }
      stream.println("Thread " + getThreadTaskName(info.getThreadId(), info.getThreadName()) + ":");
      Thread.State state = info.getThreadState();
      stream.println("  State: " + state + ", Blocked count: " + info.getBlockedCount() +
          ", Waited count: " + info.getWaitedCount());
      if (contention) {
        stream.println("  Blocked time: " + info.getBlockedTime() + ", Waited time: " + info.getWaitedTime());
      }
      if (state == Thread.State.WAITING) {
        stream.println("  Waiting on " + info.getLockName());
      } else if (state == Thread.State.BLOCKED) {
        stream.println("  Blocked on " + info.getLockName() +
            ", Blocked by " + getThreadTaskName(info.getLockOwnerId(), info.getLockOwnerName()));
      }
      stream.println("  Stack:");
      for (StackTraceElement frame : info.getStackTrace()) {
        stream.println("    " + frame.toString());
      }
      stream.println("");
    }
  }
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