001 /**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017 package org.apache.camel.management;
018
019 import javax.management.JMException;
020 import javax.management.MBeanServer;
021 import javax.management.ObjectName;
022 import javax.management.modelmbean.InvalidTargetObjectTypeException;
023 import javax.management.modelmbean.ModelMBean;
024 import javax.management.modelmbean.ModelMBeanInfo;
025 import javax.management.modelmbean.RequiredModelMBean;
026
027 import org.apache.camel.api.management.ManagedInstance;
028 import org.apache.camel.api.management.ManagedResource;
029 import org.apache.camel.api.management.NotificationSenderAware;
030 import org.apache.camel.spi.ManagementMBeanAssembler;
031 import org.apache.camel.util.ObjectHelper;
032 import org.slf4j.Logger;
033 import org.slf4j.LoggerFactory;
034
035 /**
036 * An assembler to assemble a {@link javax.management.modelmbean.ModelMBean} which can be used
037 * to register the object in JMX. The assembler is capable of using the Camel JMX annotations to
038 * gather the list of JMX operations and attributes.
039 *
040 * @version
041 */
042 public class DefaultManagementMBeanAssembler implements ManagementMBeanAssembler {
043 protected final Logger log = LoggerFactory.getLogger(getClass());
044 private final MBeanInfoAssembler assembler;
045
046 public DefaultManagementMBeanAssembler() {
047 this.assembler = new MBeanInfoAssembler();
048 }
049
050 public ModelMBean assemble(MBeanServer mBeanServer, Object obj, ObjectName name) throws JMException {
051 ModelMBeanInfo mbi = null;
052
053 // prefer to use the managed instance if it has been annotated with JMX annotations
054 if (obj instanceof ManagedInstance) {
055 // there may be a custom embedded instance which have additional methods
056 Object custom = ((ManagedInstance) obj).getInstance();
057 if (custom != null && ObjectHelper.hasAnnotation(custom.getClass().getAnnotations(), ManagedResource.class)) {
058 log.trace("Assembling MBeanInfo for: {} from custom @ManagedResource object: {}", name, custom);
059 // get the mbean info from the custom managed object
060 mbi = assembler.getMBeanInfo(obj, custom, name.toString());
061 // and let the custom object be registered in JMX
062 obj = custom;
063 }
064 }
065
066 if (mbi == null) {
067 // use the default provided mbean which has been annotated with JMX annotations
068 log.trace("Assembling MBeanInfo for: {} from @ManagedResource object: {}", name, obj);
069 mbi = assembler.getMBeanInfo(obj, null, name.toString());
070 }
071
072 RequiredModelMBean mbean = (RequiredModelMBean) mBeanServer.instantiate(RequiredModelMBean.class.getName());
073 mbean.setModelMBeanInfo(mbi);
074
075 try {
076 mbean.setManagedResource(obj, "ObjectReference");
077 } catch (InvalidTargetObjectTypeException e) {
078 throw new JMException(e.getMessage());
079 }
080
081 // Allows the managed object to send notifications
082 if (obj instanceof NotificationSenderAware) {
083 ((NotificationSenderAware)obj).setNotificationSender(new NotificationSenderAdapter(mbean));
084 }
085
086 return mbean;
087 }
088
089 }