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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) [2018] 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:
* "Portions Copyright [year] [name of copyright owner]"
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* only the GPL Version 2, indicate your decision by adding "[Contributor]
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* recipient has the option to distribute your version of this file under
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package fish.payara.microprofile.metrics.jmx;
import java.lang.management.ManagementFactory;
import java.util.Map;
import java.util.Set;
import javax.management.MBeanServer;
import javax.management.MalformedObjectNameException;
import javax.management.ObjectName;
import javax.management.QueryExp;
import javax.management.openmbean.CompositeData;
public class MBeanExpression {
private String mbean;
private String attrName;
private String subAttrName;
private ObjectName objectName;
private final MBeanServer mBeanServer = ManagementFactory.getPlatformMBeanServer();
public MBeanExpression(String expression) {
if (expression == null || expression.trim().isEmpty()) {
throw new IllegalArgumentException("MBean Expression is null");
}
int slashIndex = expression.lastIndexOf('/');
if (slashIndex < 0) {
throw new IllegalArgumentException("MBean Expression is invalid : " + expression);
}
mbean = expression.substring(0, slashIndex);
attrName = expression.substring(slashIndex + 1);
if (attrName.contains("#")) {
int hashIndex = attrName.indexOf('#');
subAttrName = attrName.substring(hashIndex + 1);
attrName = attrName.substring(0, hashIndex);
}
try {
objectName = new ObjectName(mbean);
} catch (MalformedObjectNameException ex) {
throw new IllegalArgumentException("MBean Expression is invalid : " + expression);
}
}
public String getMbean() {
return mbean;
}
public String getAttributeName() {
return attrName;
}
public String getSubAttributeName() {
return subAttrName;
}
public ObjectName getObjectName() throws MalformedObjectNameException {
return objectName;
}
public Object getAttribute() throws Exception {
return mBeanServer.getAttribute(objectName, getAttributeName());
}
public String findDynamicKey() {
for (Map.Entry entry : objectName.getKeyPropertyList().entrySet()) {
if (entry.getValue().equals("*")) {
return entry.getKey();
}
}
return null;
}
public Number getNumberValue() {
try {
Object attribute = getAttribute();
if (attribute instanceof Number) {
return (Number) attribute;
} else if (attribute instanceof CompositeData) {
CompositeData compositeData = (CompositeData) attribute;
return (Number) compositeData.get(getSubAttributeName());
} else {
throw new IllegalArgumentException(getMbean());
}
} catch (Exception ex) {
throw new RuntimeException(ex);
}
}
public Set queryNames(QueryExp query) {
return mBeanServer.queryNames(objectName, query);
}
}