Groovy example source code file (JmxListenerFactory.groovy)

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Java - Groovy tags/keywords

abstractfactory, instancenotfoundexception, jmxbuilder, jmxbuilder, jmxbuilderexception, jmxbuilderexception, jmxlistenerfactory, management, map, map, node, notificationfiltersupport, object, object, string

The Groovy JmxListenerFactory.groovy source code

/*
 * Copyright 2008 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.InstanceNotFoundException
import javax.management.NotificationFilterSupport

/**
 * This factory class is used to create an 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.
 *
 * <p> Syntax supported 

 *
 * <pre>
 * JmxBuilder.listener(event:"event type", from:"Object Name"|ObjectName(), call:{event->
 *   // event handling code here.
 *})
 * </pre>
 *
 * @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)
        }
    }
}