Beispiel #1
0
  public synchronized Collection<GarbageCollectorMXBean> getGarbageCollectorMXBeans()
      throws IOException {

    // TODO: How to deal with changes to the list??
    if (garbageCollectorMBeans == null) {
      ObjectName gcName = null;
      try {
        gcName = new ObjectName(GARBAGE_COLLECTOR_MXBEAN_DOMAIN_TYPE + ",*");
      } catch (MalformedObjectNameException e) {
        // should not reach here
        assert (false);
      }
      Set<ObjectName> mbeans = server.queryNames(gcName, null);
      if (mbeans != null) {
        garbageCollectorMBeans = new ArrayList<GarbageCollectorMXBean>();
        Iterator<ObjectName> iterator = mbeans.iterator();
        while (iterator.hasNext()) {
          ObjectName on = (ObjectName) iterator.next();
          String name = GARBAGE_COLLECTOR_MXBEAN_DOMAIN_TYPE + ",name=" + on.getKeyProperty("name");

          GarbageCollectorMXBean mBean =
              newPlatformMXBeanProxy(server, name, GarbageCollectorMXBean.class);
          garbageCollectorMBeans.add(mBean);
        }
      }
    }
    return garbageCollectorMBeans;
  }
 public static void main(String[] args) throws Exception {
   MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
   final Boolean isNotificationSupported =
       AccessController.doPrivileged(
           new PrivilegedAction<Boolean>() {
             public Boolean run() {
               try {
                 Class cl = Class.forName("sun.management.VMManagementImpl");
                 Field f = cl.getDeclaredField("gcNotificationSupport");
                 f.setAccessible(true);
                 return f.getBoolean(null);
               } catch (ClassNotFoundException e) {
                 return false;
               } catch (NoSuchFieldException e) {
                 return false;
               } catch (IllegalAccessException e) {
                 return false;
               }
             }
           });
   if (!isNotificationSupported) {
     System.out.println("GC Notification not supported by the JVM, test skipped");
     return;
   }
   final ObjectName gcMXBeanPattern = new ObjectName("java.lang:type=GarbageCollector,*");
   Set<ObjectName> names = mbs.queryNames(gcMXBeanPattern, null);
   if (names.isEmpty()) throw new Exception("Test incorrect: no GC MXBeans");
   number = names.size();
   for (ObjectName n : names) {
     if (mbs.isInstanceOf(n, "javax.management.NotificationEmitter")) {
       listenerInvoked.put(n.getCanonicalName(), null);
       GcListener listener = new GcListener();
       mbs.addNotificationListener(n, listener, null, null);
     }
   }
   // Invocation of System.gc() to trigger major GC
   System.gc();
   // Allocation of many short living and small objects to trigger minor GC
   Object data[] = new Object[32];
   for (int i = 0; i < 100000000; i++) {
     data[i % 32] = new int[8];
   }
   int wakeup = 0;
   synchronized (synchronizer) {
     while (count != number) {
       synchronizer.wait(10000);
       wakeup++;
       if (wakeup > 10) break;
     }
   }
   for (GarbageCollectionNotificationInfo notif : listenerInvoked.values()) {
     checkGarbageCollectionNotificationInfoContent(notif);
   }
   System.out.println("Test passed");
 }
 private static void checkPlatformMBeans() throws Exception {
   MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
   Set<ObjectName> mbeanNames = mbs.queryNames(null, null);
   for (ObjectName name : mbeanNames) {
     if (!mbs.isInstanceOf(name, NotificationBroadcaster.class.getName())) {
       System.out.println(name + ": not a NotificationBroadcaster");
     } else {
       MBeanInfo mbi = mbs.getMBeanInfo(name);
       check(name.toString(), mbi.getNotifications());
     }
   }
 }
Beispiel #4
0
 public <T> T getMXBean(ObjectName objName, Class<T> interfaceClass) throws IOException {
   return newPlatformMXBeanProxy(server, objName.toString(), interfaceClass);
 }