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Micro Distribution of the Payara Project for IBM JDK
/*
* 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
* enclosed by brackets [] replaced by your own identifying information:
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package fish.payara.nucleus.healthcheck.preliminary;
import fish.payara.nucleus.healthcheck.HealthCheckResult;
import fish.payara.nucleus.healthcheck.HealthCheckResultEntry;
import fish.payara.nucleus.healthcheck.HealthCheckWithThresholdExecutionOptions;
import fish.payara.nucleus.healthcheck.configuration.HeapMemoryUsageChecker;
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.ManagementFactory;
import java.lang.management.MemoryMXBean;
import java.lang.management.MemoryUsage;
/**
* @author mertcaliskan
*/
@Service(name = "healthcheck-heap")
@RunLevel(StartupRunLevel.VAL)
public class HeapMemoryUsageHealthCheck extends BaseThresholdHealthCheck {
@PostConstruct
void postConstruct() {
postConstruct(this, HeapMemoryUsageChecker.class);
}
@Override
public HealthCheckWithThresholdExecutionOptions constructOptions(HeapMemoryUsageChecker checker) {
return super.constructThresholdOptions(checker);
}
@Override
protected String getDescription() {
return "healthcheck.description.heapMemory";
}
@Override
public HealthCheckResult doCheck() {
HealthCheckResult result = new HealthCheckResult();
MemoryMXBean memBean = ManagementFactory.getMemoryMXBean() ;
MemoryUsage heap = memBean.getHeapMemoryUsage();
String heapValueText = String.format("heap: init: %s, used: %s, committed: %s, max.: %s",
prettyPrintBytes(heap.getInit()),
prettyPrintBytes(heap.getUsed()),
prettyPrintBytes(heap.getCommitted()),
prettyPrintBytes(heap.getMax()));
Double percentage = calculatePercentage(heap);
result.add(new HealthCheckResultEntry(decideOnStatusWithRatio(percentage), heapValueText + "heap%: " + percentage + "%"));
return result;
}
private Double calculatePercentage(MemoryUsage usage) {
if (usage.getMax() > 0) {
return Math.floor(((double)usage.getUsed() / (double)usage.getMax()) * 100);
}
return null;
}
}
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