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Groovy example source code file (JmxBeanFactory.groovy)

This example Groovy source code file (JmxBeanFactory.groovy) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Groovy tags/keywords

abstractfactory, iterator, jmxbeanfactory, jmxbuilder, jmxbuilder, jmxbuilderexception, management, map, map, mbean, mbeanserver, mbeanserver, object, object, you

The Groovy JmxBeanFactory.groovy source code

/*
 * Copyright 2008-2010 the original author or authors.
 *
 * Licensed 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 groovy.jmx.builder

import javax.management.MBeanServer

/**
 * This factory returns the bean() node.  This node is used to declaratively expose a POGO/POJO
 * to be exported to the MBeanServer for management.  You can use the builder node
 * to declare the descriptor or embed the descriptor directly in the object being
 * exposed using static variable descriptor (or jmx).  You should note that
 * embedded descriptor takes precedence over declared builder descriptor.
 *
 * <p>The following shows all of the different syntax forms supported by the node.

* * <pre> * bean(instance) * bean(target:instance, name:ObjectName|"...", desc|description:"...") * bean(target:instance, * server:MBeanServerConnection * name:ObjectName()|"...", * desc|description:"...", * attribs|attributes:"*", * attribs|attributes:[] * attribs|attributes:["attribName1","attribName2",..."attribNameN"] * attribs|attributes:[ * "attribName0":"*", * "attribName1":[desc|description:"...", default:value, writable|editable:true|false,...] * "attribName2":[onChange:{event-> * // onChange event callback code here. * ] * ], * * ctors|constructors:"*", * ctors|constructors:[ * "CtorName0":[], * "CtorName1":["paramType1","paramType2"], * "CtorName2":[ * desc|description:"...", * params:[ * "type0":"*" * "type1":[desc|description:"...", name:"...", ] * ] * ] * ], * * ops|operations:"*", * ops|operations:["opName1", "opName2", "opName3",...,"opNameN"], * ops|operations:[ * "opName0":"*", * "opName1":["type1","type2,"type3"] * "opName2":[ * desc:"description", * params:[ * "type0":"*" * "type1":[desc|description:"...", name:"...", ], * "typeN":[desc|description:"...", name:"...", ], * ], * ], * "opName3":[ * onCall:{event-> * // onCall event callback code here. * }] * ], * * listeners:[ * ListenerName:[ * event: "eventType", from:"object name"|ObjectName(), * call:{event-> * // handler code for event * }], * ] * ) * </code>
* * @author Vladimir Vivien */ class JmxBeanFactory extends AbstractFactory { public Object newInstance(FactoryBuilderSupport builder, Object nodeName, Object nodeParam, Map nodeAttributes) { JmxBuilder fsb = (JmxBuilder) builder MBeanServer server = (MBeanServer) fsb.getMBeanServer() def metaMap def target // embedded descriptor or implied descriptor if (nodeParam) { target = nodeParam metaMap = initMetaMap(target) metaMap = JmxMetaMapBuilder.buildObjectMapFrom(target) } // descriptor provided else if (nodeAttributes) { target = nodeAttributes.target metaMap = initMetaMap(target) metaMap = JmxMetaMapBuilder.buildObjectMapFrom(target, nodeAttributes) } // make sure a server instance is there metaMap.server = metaMap.server ?: server //if target implements MBean, MxBean,or Dynamic bean, skip metaMap step metaMap.isMBean = JmxBuilderTools.isClassMBean(target.getClass()) return metaMap } public boolean onHandleNodeAttributes(FactoryBuilderSupport builder, Object node, Map nodeAttribs) { return false; } public void onNodeCompleted(FactoryBuilderSupport builder, Object parentNode, Object thisNode) { JmxBuilder fsb = (JmxBuilder) builder MBeanServer server = (MBeanServer) fsb.getMBeanServer() def metaMap = thisNode def regPolicy = fsb.parentFactory?.registrationPolicy ?: "replace" def registeredBean = JmxBuilderTools.registerMBeanFromMap(regPolicy, metaMap) // if replace, remove from parent node and re add. if (parentNode != null && registeredBean && regPolicy == "replace") { for (Iterator i = parentNode.iterator(); i.hasNext();) { def exportedBean = i.next() if (exportedBean.name().equals(metaMap.jmxName)) { i.remove() } } } // only add if bean was successfully registered. if (parentNode != null && registeredBean) { parentNode.add(registeredBean) } } public boolean isLeaf() { return false } private def initMetaMap(target) { if (!target) { throw new JmxBuilderException("You must specify a target object to " + " export as MBean i.e. JmxBuilder.bean(targetInstance), " + " JmxBuilder.bean([target:instance]), JmxBuilder.beans([instanceList]).") } def metaMap = [:] metaMap.target = target metaMap.name = target.class.canonicalName metaMap } }

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