groovy.jmx.builder.JmxListenerFactory.groovy Maven / Gradle / Ivy
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Groovy: A powerful, dynamic language for the JVM
/*
* 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 groovy.jmx.builder
import javax.management.InstanceNotFoundException
import javax.management.NotificationFilterSupport
/**
* This factory class is used to create a listener() node for JmxBuilder. Listener nodes are used
* to create a generic event listener (that is automatically registered with the MBean) that can handle
* any event broadcasted on the MBeanServer's event bus.
*
* Syntax supported:
*
* JmxBuilder.listener(event:"event type", from:"Object Name"|ObjectName(), call:{event->
* // event handling code here.
* })
*
*
* @author Vladimir Vivien
* @see groovy.jmx.builder.JmxEventListener
*/
class JmxListenerFactory extends AbstractFactory {
public Object newInstance(FactoryBuilderSupport builder, Object nodeName, Object nodeParam, Map nodeAttribs) {
if (nodeParam) {
throw new JmxBuilderException("Node '${nodeName}' only supports named attributes.")
}
JmxBuilder fsb = (JmxBuilder) builder
def server = fsb.getMBeanServer()
def map = JmxMetaMapBuilder.createListenerMap(nodeAttribs);
def broadcaster = map.get("from");
try {
def eventType = (String) map.get("event");
if (!server.isRegistered(broadcaster)) {
throw new JmxBuilderException("MBean '${broadcaster.toString()}' is not registered in server.")
}
if (eventType) {
NotificationFilterSupport filter = new NotificationFilterSupport();
filter.enableType(eventType);
server.addNotificationListener(broadcaster, JmxEventListener.getListener(), filter, map);
} else {
server.addNotificationListener(broadcaster, JmxEventListener.getListener(), null, map);
}
} catch (InstanceNotFoundException e) {
throw new JmxBuilderException(e);
}
map
}
public boolean onHandleNodeAttributes(FactoryBuilderSupport builder, Object node, Map nodeAttribs) {
return false;
}
public boolean isLeaf() {
return true;
}
public void onNodeCompleted(FactoryBuilderSupport builder, Object parentNode, Object thisNode) {
if (parentNode != null) {
parentNode.add(thisNode)
}
}
}