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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2016-2017 Payara Foundation and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://github.com/payara/Payara/blob/master/LICENSE.txt
* See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at glassfish/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* The Payara Foundation designates this particular file as subject to the "Classpath"
* exception as provided by the Payara Foundation in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
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package fish.payara.nucleus.healthcheck.preliminary;
import fish.payara.nucleus.healthcheck.*;
import fish.payara.nucleus.healthcheck.configuration.GarbageCollectorChecker;
import org.glassfish.api.StartupRunLevel;
import org.glassfish.hk2.runlevel.RunLevel;
import org.jvnet.hk2.annotations.Service;
import javax.annotation.PostConstruct;
import java.lang.management.GarbageCollectorMXBean;
import java.lang.management.ManagementFactory;
import java.util.List;
import static fish.payara.nucleus.notification.TimeHelper.prettyPrintDuration;
/**
* -XX:+UseSerialGC -->
* -XX:+UseG1GC -->
* -XX:+UseParallelGC -->
* -XX:+UseParNewGC -->
* -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -->
* -XX:+UseConcMarkSweepGC -XX:-UseParNewGC -->
*
* @author mertcaliskan
*/
@Service(name = "healthcheck-gc")
@RunLevel(StartupRunLevel.VAL)
public class GarbageCollectorHealthCheck extends BaseThresholdHealthCheck {
private long youngLastCollectionCount;
private long youngLastCollectionTime;
private long oldLastCollectionCount;
private long oldLastCollectionTime;
@PostConstruct
void postConstruct() {
postConstruct(this, GarbageCollectorChecker.class);
}
@Override
public HealthCheckWithThresholdExecutionOptions constructOptions(GarbageCollectorChecker checker) {
return super.constructThresholdOptions(checker);
}
@Override
protected String getDescription() {
return "healthcheck.description.garbageCollector";
}
@Override
public HealthCheckResult doCheck() {
HealthCheckResult result = new HealthCheckResult();
List gcBeanList = ManagementFactory.getGarbageCollectorMXBeans();
for (GarbageCollectorMXBean gcBean : gcBeanList) {
double percentage = 0;
if (YOUNG_PS_SCAVENGE.equals(gcBean.getName()) ||
YOUNG_G1GC.equals(gcBean.getName()) ||
YOUNG_COPY.equals(gcBean.getName()) ||
YOUNG_PARNEW.equals(gcBean.getName())) {
long diffCount = gcBean.getCollectionCount() - youngLastCollectionCount;
long diffTime = gcBean.getCollectionTime() - youngLastCollectionTime;
if (diffTime > 0 && youngLastCollectionCount > 0) {
percentage = ((diffCount) / (youngLastCollectionCount)) * 100;
result.add(new HealthCheckResultEntry(decideOnStatusWithRatio(percentage),
diffCount + " times Young GC (" + gcBean.getName() + ") after " + prettyPrintDuration(diffTime)));
}
youngLastCollectionCount = gcBean.getCollectionCount();
youngLastCollectionTime = gcBean.getCollectionTime();
}
else if (OLD_PS_MARKSWEEP.equals(gcBean.getName()) ||
OLD_G1GC.equals(gcBean.getName()) ||
OLD_MARK_SWEEP_COMPACT.equals(gcBean.getName()) ||
OLD_CONCURRENTMARKSWEEP.equals(gcBean.getName())) {
long diffCount = gcBean.getCollectionCount() - oldLastCollectionCount;
long diffTime = gcBean.getCollectionTime() - oldLastCollectionTime;
if (diffTime > 0 && oldLastCollectionCount > 0) {
percentage = ((diffCount) / (oldLastCollectionCount)) * 100;
result.add(new HealthCheckResultEntry(decideOnStatusWithRatio(percentage),
diffCount + " times Old GC (" + gcBean.getName() + ") after " + prettyPrintDuration(diffTime)));
}
oldLastCollectionCount = gcBean.getCollectionCount();
oldLastCollectionTime = gcBean.getCollectionTime();
}
else {
result.add(new HealthCheckResultEntry(HealthCheckResultStatus.CHECK_ERROR, "Could not identify " +
"GarbageCollectorMXBean with name: " + gcBean.getName()));
}
}
return result;
}
}