/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
package org.apache.camel.management;
import javax.management.JMException;
import javax.management.MBeanServer;
import javax.management.ObjectName;
import javax.management.modelmbean.InvalidTargetObjectTypeException;
import javax.management.modelmbean.ModelMBeanInfo;
import javax.management.modelmbean.RequiredModelMBean;
import org.apache.camel.management.mbean.ManagedInstance;
import org.apache.camel.util.ObjectHelper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.jmx.export.annotation.AnnotationJmxAttributeSource;
import org.springframework.jmx.export.annotation.ManagedResource;
import org.springframework.jmx.export.assembler.MetadataMBeanInfoAssembler;
/**
* An assembler to assemble a {@link javax.management.modelmbean.RequiredModelMBean} which can be used
* to register the object in JMX. The assembler is capable of using the Spring JMX annotations to
* gather the list of JMX operations and attributes.
*
* @version
*/
public class JmxMBeanAssembler {
private static final Logger LOG = LoggerFactory.getLogger(JmxMBeanAssembler.class);
private final MetadataMBeanInfoAssembler assembler;
private final MBeanServer server;
public JmxMBeanAssembler(MBeanServer server) {
this.server = server;
this.assembler = new MetadataMBeanInfoAssembler();
this.assembler.setAttributeSource(new AnnotationJmxAttributeSource());
}
public RequiredModelMBean assemble(Object obj, ObjectName name) throws JMException {
ModelMBeanInfo mbi = null;
// prefer to use the managed instance if it has been annotated with Spring JMX annotations
if (obj instanceof ManagedInstance) {
Object custom = ((ManagedInstance) obj).getInstance();
if (custom != null && ObjectHelper.hasAnnotation(custom.getClass().getAnnotations(), ManagedResource.class)) {
LOG.trace("Assembling MBeanInfo for: {} from custom @ManagedResource object: {}", name, custom);
// get the mbean info from the custom managed object
mbi = assembler.getMBeanInfo(custom, name.toString());
// and let the custom object be registered in JMX
obj = custom;
}
}
if (mbi == null) {
// use the default provided mbean which has been annotated with Spring JMX annotations
LOG.trace("Assembling MBeanInfo for: {} from @ManagedResource object: {}", name, obj);
mbi = assembler.getMBeanInfo(obj, name.toString());
}
RequiredModelMBean mbean = (RequiredModelMBean) server.instantiate(RequiredModelMBean.class.getName());
mbean.setModelMBeanInfo(mbi);
try {
mbean.setManagedResource(obj, "ObjectReference");
} catch (InvalidTargetObjectTypeException e) {
throw new JMException(e.getMessage());
}
return mbean;
}
}