act.sys.GcHelper Maven / Gradle / Ivy
package act.sys;
/*-
* #%L
* ACT Framework
* %%
* Copyright (C) 2014 - 2019 ActFramework
* %%
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* #L%
*/
import com.sun.management.GarbageCollectionNotificationInfo;
import com.sun.management.GcInfo;
import org.osgl.$;
import javax.management.Notification;
import javax.management.NotificationEmitter;
import javax.management.NotificationListener;
import javax.management.openmbean.CompositeData;
import java.lang.management.ManagementFactory;
import java.util.List;
public class GcHelper {
private static volatile List gcBeans;
static {
gcBeans = ManagementFactory.getGarbageCollectorMXBeans();
}
public static void registerGcEventListener(final $.Visitor listener) {
for (java.lang.management.GarbageCollectorMXBean mxBean : gcBeans) {
NotificationEmitter emitter = (NotificationEmitter) mxBean;
emitter.addNotificationListener(new NotificationListener() {
@Override
public void handleNotification(Notification notification, Object handback) {
if (notification.getType().equals(GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION)) {
GarbageCollectionNotificationInfo gcInfo = GarbageCollectionNotificationInfo.from((CompositeData) notification.getUserData());
listener.visit(gcInfo.getGcInfo());
}
}
}, null, null);
}
}
}