Java Code Examples for com.sun.management.GarbageCollectionNotificationInfo#from()

The following examples show how to use com.sun.management.GarbageCollectionNotificationInfo#from() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.

Example 1

Source File: GarbageCollectionNotificationContentTest.java From openjdk-jdk8u-backup with GNU General Public License v2.0

6 votes

public void handleNotification(Notification notif, Object handback) {
    String type = notif.getType();
    if (type.equals(GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION)) {
        GarbageCollectionNotificationInfo gcNotif =
            GarbageCollectionNotificationInfo.from((CompositeData) notif.getUserData());
        String source = ((ObjectName)notif.getSource()).getCanonicalName();
        synchronized(synchronizer) {
            if(listenerInvoked.get(source) == null) {
                    listenerInvoked.put(((ObjectName)notif.getSource()).getCanonicalName(),gcNotif);
                    count++;
                    if(count >= number) {
                        synchronizer.notify();
                    }
            }
        }
    }
}

Example 2

Source File: GarbageCollectionNotificationTest.java From jdk8u_jdk with GNU General Public License v2.0

6 votes

public void handleNotification(Notification notif, Object handback) {
    String type = notif.getType();
    if (type.equals(GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION)) {
        GarbageCollectionNotificationInfo gcNotif =
            GarbageCollectionNotificationInfo.from((CompositeData) notif.getUserData());
        String source = ((ObjectName)notif.getSource()).getCanonicalName();
        synchronized(synchronizer) {
            if(!listenerInvoked.get(source)) {
                    listenerInvoked.put(((ObjectName)notif.getSource()).getCanonicalName(),true);
                    count++;
                    if(count >= number) {
                        synchronizer.notify();
                    }
            }
        }
    }
}

Example 3

Source File: GarbageCollectionNotificationContentTest.java From TencentKona-8 with GNU General Public License v2.0

6 votes

public void handleNotification(Notification notif, Object handback) {
    String type = notif.getType();
    if (type.equals(GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION)) {
        GarbageCollectionNotificationInfo gcNotif =
            GarbageCollectionNotificationInfo.from((CompositeData) notif.getUserData());
        String source = ((ObjectName)notif.getSource()).getCanonicalName();
        synchronized(synchronizer) {
            if(listenerInvoked.get(source) == null) {
                    listenerInvoked.put(((ObjectName)notif.getSource()).getCanonicalName(),gcNotif);
                    count++;
                    if(count >= number) {
                        synchronizer.notify();
                    }
            }
        }
    }
}

Example 4

Source File: GarbageCollectionNotificationTest.java From TencentKona-8 with GNU General Public License v2.0

6 votes

public void handleNotification(Notification notif, Object handback) {
    String type = notif.getType();
    if (type.equals(GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION)) {
        GarbageCollectionNotificationInfo gcNotif =
            GarbageCollectionNotificationInfo.from((CompositeData) notif.getUserData());
        String source = ((ObjectName)notif.getSource()).getCanonicalName();
        synchronized(synchronizer) {
            if(!listenerInvoked.get(source)) {
                    listenerInvoked.put(((ObjectName)notif.getSource()).getCanonicalName(),true);
                    count++;
                    if(count >= number) {
                        synchronizer.notify();
                    }
            }
        }
    }
}

Example 5

Source File: GarbageCollectionNotificationContentTest.java From jdk8u-dev-jdk with GNU General Public License v2.0

6 votes

public void handleNotification(Notification notif, Object handback) {
    String type = notif.getType();
    if (type.equals(GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION)) {
        GarbageCollectionNotificationInfo gcNotif =
            GarbageCollectionNotificationInfo.from((CompositeData) notif.getUserData());
        String source = ((ObjectName)notif.getSource()).getCanonicalName();
        synchronized(synchronizer) {
            if(listenerInvoked.get(source) == null) {
                    listenerInvoked.put(((ObjectName)notif.getSource()).getCanonicalName(),gcNotif);
                    count++;
                    if(count >= number) {
                        synchronizer.notify();
                    }
            }
        }
    }
}

Example 6

Source File: ReferenceManagerImpl.java From tinkergraph-gremlin with Apache License 2.0

6 votes

private NotificationListener createNotificationListener() {
  Set<String> ignoredMemoryAreas = new HashSet<>(Arrays.asList("Code Cache", "Compressed Class Space", "Metaspace"));
  return (notification, handback) -> {
      if (notification.getType().equals(GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION)) {
        GarbageCollectionNotificationInfo info = GarbageCollectionNotificationInfo.from((CompositeData) notification.getUserData());

        //sum up used and max memory across relevant memory areas
        long totalMemUsed = 0;
        long totalMemMax = 0;
        for (Map.Entry<String, MemoryUsage> entry : info.getGcInfo().getMemoryUsageAfterGc().entrySet()) {
          String name = entry.getKey();
          if (!ignoredMemoryAreas.contains(name)) {
            MemoryUsage detail = entry.getValue();
            totalMemUsed += detail.getUsed();
            totalMemMax += detail.getMax();
          }
        }
        float heapUsage = (float) totalMemUsed / (float) totalMemMax;
        int heapUsagePercent = (int) Math.floor(heapUsage * 100f);
        logger.trace("heap usage after GC: " + heapUsagePercent + "%");
        maybeClearReferences(heapUsage);
      }
    };
}

Example 7

Source File: GarbageCollectionNotificationContentTest.java From openjdk-8 with GNU General Public License v2.0

6 votes

public void handleNotification(Notification notif, Object handback) {
    String type = notif.getType();
    if (type.equals(GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION)) {
        GarbageCollectionNotificationInfo gcNotif =
            GarbageCollectionNotificationInfo.from((CompositeData) notif.getUserData());
        String source = ((ObjectName)notif.getSource()).getCanonicalName();
        synchronized(synchronizer) {
            if(listenerInvoked.get(source) == null) {
                    listenerInvoked.put(((ObjectName)notif.getSource()).getCanonicalName(),gcNotif);
                    count++;
                    if(count >= number) {
                        synchronizer.notify();
                    }
            }
        }
    }
}

Example 8

Source File: GarbageCollectionNotificationContentTest.java From jdk8u-jdk with GNU General Public License v2.0

6 votes

public void handleNotification(Notification notif, Object handback) {
    String type = notif.getType();
    if (type.equals(GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION)) {
        GarbageCollectionNotificationInfo gcNotif =
            GarbageCollectionNotificationInfo.from((CompositeData) notif.getUserData());
        String source = ((ObjectName)notif.getSource()).getCanonicalName();
        synchronized(synchronizer) {
            if(listenerInvoked.get(source) == null) {
                    listenerInvoked.put(((ObjectName)notif.getSource()).getCanonicalName(),gcNotif);
                    count++;
                    if(count >= number) {
                        synchronizer.notify();
                    }
            }
        }
    }
}

Example 9

Source File: GarbageCollectionNotificationTest.java From openjdk-jdk8u-backup with GNU General Public License v2.0

6 votes

public void handleNotification(Notification notif, Object handback) {
    String type = notif.getType();
    if (type.equals(GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION)) {
        GarbageCollectionNotificationInfo gcNotif =
            GarbageCollectionNotificationInfo.from((CompositeData) notif.getUserData());
        String source = ((ObjectName)notif.getSource()).getCanonicalName();
        synchronized(synchronizer) {
            if(!listenerInvoked.get(source)) {
                    listenerInvoked.put(((ObjectName)notif.getSource()).getCanonicalName(),true);
                    count++;
                    if(count >= number) {
                        synchronizer.notify();
                    }
            }
        }
    }
}

Example 10

Source File: GarbageCollectionNotificationTest.java From jdk8u-jdk with GNU General Public License v2.0

6 votes

public void handleNotification(Notification notif, Object handback) {
    String type = notif.getType();
    if (type.equals(GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION)) {
        GarbageCollectionNotificationInfo gcNotif =
            GarbageCollectionNotificationInfo.from((CompositeData) notif.getUserData());
        String source = ((ObjectName)notif.getSource()).getCanonicalName();
        synchronized(synchronizer) {
            if(!listenerInvoked.get(source)) {
                    listenerInvoked.put(((ObjectName)notif.getSource()).getCanonicalName(),true);
                    count++;
                    if(count >= number) {
                        synchronizer.notify();
                    }
            }
        }
    }
}

Example 11

Source File: JVMUtils.java From babar with Apache License 2.0

6 votes

/**
 * Register to all notifications from the GC MXBeans.
 * @param listener          A java NotificationListener
 */
public static void registerGCListener(GCListener listener) {

    // takes the GC listener and makes javax NotificationListener that filters GC notifications
    NotificationListener notificationListener = new NotificationListener() {
        @Override
        public void handleNotification(Notification notification, Object handback) {
            if (!notification.getType().equals(GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION)) return;

            // get the GC info object
            GarbageCollectionNotificationInfo info = GarbageCollectionNotificationInfo.from((CompositeData)notification.getUserData());
            String gcAction = info.getGcAction();
            if (MINOR_GC_ACTION.equals(gcAction)) {
                listener.onMinorGc(info.getGcInfo().getDuration());
            }
            else if (MAJOR_GC_ACTION.equals(gcAction)) {
                listener.onMajorGc(info.getGcInfo().getDuration());
            }
        }
    };

    // register to the GC beans
    for (GarbageCollectorMXBean bean: ManagementFactory.getGarbageCollectorMXBeans()) {
        ((NotificationEmitter)bean).addNotificationListener(notificationListener, null, null);
    }
}

Example 12

Source File: GarbageCollectionNotificationTest.java From openjdk-8-source with GNU General Public License v2.0

6 votes

public void handleNotification(Notification notif, Object handback) {
    String type = notif.getType();
    if (type.equals(GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION)) {
        GarbageCollectionNotificationInfo gcNotif =
            GarbageCollectionNotificationInfo.from((CompositeData) notif.getUserData());
        String source = ((ObjectName)notif.getSource()).getCanonicalName();
        synchronized(synchronizer) {
            if(!listenerInvoked.get(source)) {
                    listenerInvoked.put(((ObjectName)notif.getSource()).getCanonicalName(),true);
                    count++;
                    if(count >= number) {
                        synchronizer.notify();
                    }
            }
        }
    }
}

Example 13

Source File: GarbageCollectionNotificationContentTest.java From openjdk-8-source with GNU General Public License v2.0

6 votes

public void handleNotification(Notification notif, Object handback) {
    String type = notif.getType();
    if (type.equals(GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION)) {
        GarbageCollectionNotificationInfo gcNotif =
            GarbageCollectionNotificationInfo.from((CompositeData) notif.getUserData());
        String source = ((ObjectName)notif.getSource()).getCanonicalName();
        synchronized(synchronizer) {
            if(listenerInvoked.get(source) == null) {
                    listenerInvoked.put(((ObjectName)notif.getSource()).getCanonicalName(),gcNotif);
                    count++;
                    if(count >= number) {
                        synchronizer.notify();
                    }
            }
        }
    }
}

Example 14

Source File: GarbageCollectionNotificationTest.java From openjdk-jdk8u with GNU General Public License v2.0

6 votes

public void handleNotification(Notification notif, Object handback) {
    String type = notif.getType();
    if (type.equals(GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION)) {
        GarbageCollectionNotificationInfo gcNotif =
            GarbageCollectionNotificationInfo.from((CompositeData) notif.getUserData());
        String source = ((ObjectName)notif.getSource()).getCanonicalName();
        synchronized(synchronizer) {
            if(!listenerInvoked.get(source)) {
                    listenerInvoked.put(((ObjectName)notif.getSource()).getCanonicalName(),true);
                    count++;
                    if(count >= number) {
                        synchronizer.notify();
                    }
            }
        }
    }
}

Example 15

Source File: GarbageCollectionMonitor.java From spark with GNU General Public License v3.0

5 votes

@Override
public void handleNotification(Notification notification, Object handback) {
    if (!notification.getType().equals(GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION)) {
        return;
    }

    GarbageCollectionNotificationInfo data = GarbageCollectionNotificationInfo.from((CompositeData) notification.getUserData());
    for (Listener listener : this.listeners) {
        listener.onGc(data);
    }
}

Example 16

Source File: JvmHeapPressureMetrics.java From micrometer with Apache License 2.0

5 votes

private void monitor() {
    double maxOldGen = JvmMemory.getOldGen().map(mem -> JvmMemory.getUsageValue(mem, MemoryUsage::getMax)).orElse(0.0);

    for (GarbageCollectorMXBean mbean : ManagementFactory.getGarbageCollectorMXBeans()) {
        if (!(mbean instanceof NotificationEmitter)) {
            continue;
        }
        NotificationListener notificationListener = (notification, ref) -> {
            if (!notification.getType().equals(GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION)) {
                return;
            }

            CompositeData cd = (CompositeData) notification.getUserData();
            GarbageCollectionNotificationInfo notificationInfo = GarbageCollectionNotificationInfo.from(cd);

            String gcCause = notificationInfo.getGcCause();
            GcInfo gcInfo = notificationInfo.getGcInfo();
            long duration = gcInfo.getDuration();

            if (!JvmMemory.isConcurrentPhase(gcCause)) {
                gcPauseSum.record(duration);
            }

            Map<String, MemoryUsage> after = gcInfo.getMemoryUsageAfterGc();

            if (oldGenPoolName != null) {
                final long oldAfter = after.get(oldGenPoolName).getUsed();
                lastOldGenUsageAfterGc.set(oldAfter / maxOldGen);
            }
        };
        NotificationEmitter notificationEmitter = (NotificationEmitter) mbean;
        notificationEmitter.addNotificationListener(notificationListener, null, null);
        notificationListenerCleanUpRunnables.add(() -> {
            try {
                notificationEmitter.removeNotificationListener(notificationListener);
            } catch (ListenerNotFoundException ignore) {
            }
        });
    }
}

Example 17

Source File: TestExcessGCLockerCollections.java From TencentKona-8 with GNU General Public License v2.0

5 votes

@Override
public void handleNotification(Notification notification, Object handback) {
    try {
        if (notification.getType().equals(GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION)) {
            GarbageCollectionNotificationInfo info =
                    GarbageCollectionNotificationInfo.from((CompositeData) notification.getUserData());

            String gc_cause = info.getGcCause();

            if (gc_cause.equals(TestExcessGCLockerCollectionsStringConstants.GCLOCKER_CAUSE)) {
                Map<String, MemoryUsage> memory_before_gc = info.getGcInfo().getMemoryUsageBeforeGc();

                for (String newGenPoolName : newGenPoolNames) {
                    MemoryUsage usage = memory_before_gc.get(newGenPoolName);
                    if (usage == null) continue;

                    double startTime = ((double) info.getGcInfo().getStartTime()) / 1000.0;
                    long used = usage.getUsed();
                    long committed = usage.getCommitted();
                    long max = usage.getMax();
                    double used_percent = (((double) used) / Math.max(committed, max)) * 100.0;

                    System.out.printf("%6.3f: (%s) %d/%d/%d, %8.4f%% (%s)\n",
                                      startTime, gc_cause, used, committed, max, used_percent,
                                      ((used_percent < MIN_USED_PERCENT) ? TestExcessGCLockerCollectionsStringConstants.USED_TOO_LOW
                                                                         : TestExcessGCLockerCollectionsStringConstants.USED_OK));
                }
            }
        }
    } catch (RuntimeException ex) {
        System.err.println("Exception during notification processing:" + ex);
        ex.printStackTrace();
    }
}

Example 18

Source File: MemoryMonitor.java From tsml with GNU General Public License v3.0

4 votes

public void installMonitor(){
        //get all the GarbageCollectorMXBeans - there's one for each heap generation
        //so probably two - the old generation and young generation
        List<GarbageCollectorMXBean> gcbeans = java.lang.management.ManagementFactory.getGarbageCollectorMXBeans();
        //Install a notification handler for each bean
        for (GarbageCollectorMXBean gcbean : gcbeans) {
            NotificationEmitter emitter = (NotificationEmitter) gcbean;
            //use an anonymously generated listener for this example
            // - proper code should really use a named class
            NotificationListener listener = new NotificationListener() {
                //keep a count of the total time spent in GCs
                long totalGcDuration = 0;

                //implement the notifier callback handler
                @Override
                public void handleNotification(Notification notification, Object handback) {
                    //we only handle GARBAGE_COLLECTION_NOTIFICATION notifications here
                    if (notification.getType().equals(GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION)) {
                        //get the information associated with this notification
                        GarbageCollectionNotificationInfo info = GarbageCollectionNotificationInfo.from((CompositeData) notification.getUserData());
                        //get all the info and pretty print it
                        //Get the information about each memory space, and pretty print it
                        Map<String, MemoryUsage> membefore = info.getGcInfo().getMemoryUsageBeforeGc();
                        Map<String, MemoryUsage> mem = info.getGcInfo().getMemoryUsageAfterGc();
                        long memInit=0;
                        long memCommitted=0;
                        long memMax=0;
                        long memUsed=0;
//                        MemoryUsage before;

                        for (Map.Entry<String, MemoryUsage> entry : mem.entrySet()) {
                            String name = entry.getKey();
                            MemoryUsage memdetail = entry.getValue();
                             memInit += memdetail.getInit();
                             memCommitted += memdetail.getCommitted();
                             memMax += memdetail.getMax();
                             memUsed += memdetail.getUsed();
 //                           MemoryUsage before = membefore.get(name);
//                            System.out.print(name + (memCommitted==memMax?"(fully expanded)":"(still expandable)") +"used: "+(beforepercent/10)+"."+(beforepercent%10)+"%->"+(percent/10)+"."+(percent%10)+"%("+((memUsed/1048576)+1)+"MB) / ");
                        }
//                        System.out.println(" Mem max (max used or available?)"+memMax/100000+" mem used (before or after?)"+memUsed/100000+" mem committed? ="+memCommitted/1000000);
                        if(memMax>maxMemMax)
                            maxMemMax=memMax;
                        if(memUsed>maxMemUsed)
                            maxMemUsed=memUsed;
                        if(memCommitted>maxMemCommitted)
                            maxMemCommitted= memCommitted;
                    }
                }
            };
            //Add the listener
            emitter.addNotificationListener(listener, null, null);
        }
    }

Example 19

Source File: XTraceGCUtils.java From tracing-framework with BSD 3-Clause "New" or "Revised" License

4 votes

private static GarbageCollectionNotificationInfo getInfo(Notification notification) {
    CompositeData cd = (CompositeData) notification.getUserData();
    return GarbageCollectionNotificationInfo.from(cd);
}

Example 20

Source File: GarbageCollection.java From tracing-framework with BSD 3-Clause "New" or "Revised" License

4 votes

private GarbageCollectionNotificationInfo getInfo(Notification notification) {
    CompositeData cd = (CompositeData) notification.getUserData();
    return GarbageCollectionNotificationInfo.from(cd);
}