Commons Modeler example source code file (MBeanProxy.java)

This example Commons Modeler source code file (MBeanProxy.java) 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 - Commons Modeler tags/keywords

attributenotfoundexception, basemodelmbean, exception, hashmap, management, mbeanexception, mbeanexception, mbeanproxy, object, object, reflectionexception, reflectionexception, string, string, updating, util

The Commons Modeler MBeanProxy.java source code

/*
 * 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.commons.modeler.mbeans;

import java.util.HashMap;

import javax.management.Attribute;
import javax.management.AttributeNotFoundException;
import javax.management.MBeanException;
import javax.management.ReflectionException;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.commons.modeler.BaseModelMBean;

/** Use the same metadata, except that we replace the attribute
 * get/set methods.
 */
class MBeanProxy extends BaseModelMBean {
    private static Log log = LogFactory.getLog(MBeanProxy.class);

    HashMap atts=new HashMap();

    SimpleRemoteConnector jkmx;

    public MBeanProxy(SimpleRemoteConnector jkmx, String code) throws Exception {
        this.jkmx=jkmx;
        initModelInfo(code);
    }

    /** Called by the connector - will update the value when a chunk of
     * data is received
     */
    protected void update( String name, String val ) {
        if( log.isTraceEnabled() )
            log.trace( "Updating " + oname + " " + name + " " + val);
        // XXX Conversions !!!
        atts.put( name, val);
    }

    public Object getAttribute(String name)
        throws AttributeNotFoundException, MBeanException,
            ReflectionException
    {
        // If we're stale - refresh values
        jkmx.refresh();
        return atts.get(name);
    }

    public void setAttribute(Attribute attribute)
        throws AttributeNotFoundException, MBeanException,
        ReflectionException
    {
        try {
            jkmx.setAttribute(oname, attribute);
        } catch( Exception ex ) {
            throw new MBeanException(ex);
        }
    }

    public Object invoke(String name, Object params[], String signature[])
        throws MBeanException, ReflectionException
    {
        try {
            jkmx.invoke(oname, name, params, signature);
        } catch( Exception ex ) {
            throw new MBeanException(ex);
        }
        return null;
    }
}