Exemplo n.º 1
0
  private static void checkThreadInfo() throws Exception {
    // assume all threads stay alive
    long[] ids = (long[]) server.getAttribute(thread, "AllThreadIds");
    Object result = server.invoke(thread, "getThreadInfo", new Object[] {ids}, new String[] {"[J"});
    for (CompositeData cd : (CompositeData[]) result) {
      printThreadInfo(cd);
    }

    result =
        server.invoke(
            thread,
            "getThreadInfo",
            new Object[] {ids, new Integer(2)},
            new String[] {"[J", "int"});
    for (CompositeData cd : (CompositeData[]) result) {
      printThreadInfo(cd);
    }

    long id = Thread.currentThread().getId();
    result =
        server.invoke(thread, "getThreadInfo", new Object[] {new Long(id)}, new String[] {"long"});
    printThreadInfo((CompositeData) result);

    result =
        server.invoke(
            thread,
            "getThreadInfo",
            new Object[] {new Long(id), new Integer(2)},
            new String[] {"long", "int"});
    printThreadInfo((CompositeData) result);
  }
Exemplo n.º 2
0
 // Acquire the lock if state is zero
 public boolean tryAcquire(int acquires) {
   assert acquires == 1; // Otherwise unused
   if (compareAndSetState(0, 1)) {
     setExclusiveOwnerThread(Thread.currentThread());
     return true;
   }
   return false;
 }
Exemplo n.º 3
0
  public static void main(String[] argv) throws Exception {
    mbean = newPlatformMXBeanProxy(server, THREAD_MXBEAN_NAME, ThreadMXBean.class);

    if (!mbean.isSynchronizerUsageSupported()) {
      System.out.println("Monitoring of synchronizer usage not supported");
      return;
    }

    thread.setDaemon(true);
    thread.start();

    // wait until myThread acquires mutex and lock owner is set.
    while (!(mutex.isLocked() && mutex.getLockOwner() == thread)) {
      try {
        Thread.sleep(100);
      } catch (InterruptedException e) {
        throw new RuntimeException(e);
      }
    }

    long[] ids = new long[] {thread.getId()};

    // validate the local access
    ThreadInfo[] infos = getThreadMXBean().getThreadInfo(ids, true, true);
    if (infos.length != 1) {
      throw new RuntimeException(
          "Returned ThreadInfo[] of length=" + infos.length + ". Expected to be 1.");
    }
    thread.checkThreadInfo(infos[0]);

    // validate the remote access
    infos = mbean.getThreadInfo(ids, true, true);
    if (infos.length != 1) {
      throw new RuntimeException(
          "Returned ThreadInfo[] of length=" + infos.length + ". Expected to be 1.");
    }
    thread.checkThreadInfo(infos[0]);

    boolean found = false;
    infos = mbean.dumpAllThreads(true, true);
    for (ThreadInfo ti : infos) {
      if (ti.getThreadId() == thread.getId()) {
        thread.checkThreadInfo(ti);
        found = true;
      }
    }

    if (!found) {
      throw new RuntimeException("No ThreadInfo found for MyThread");
    }

    System.out.println("Test passed");
  }