ActiveMQ example source code file (JNDIBaseStorable.java)

This example ActiveMQ source code file (JNDIBaseStorable.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 - ActiveMQ tags/keywords

classnotfoundexception, externalizable, io, ioexception, ioexception, jndibasestorable, jndibasestorable, jndistorableinterface, naming, namingexception, namingexception, properties, properties, reference, util

The ActiveMQ JNDIBaseStorable.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.activemq.jndi;

import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.util.Properties;

import javax.naming.NamingException;
import javax.naming.Reference;

/**
 * Facilitates objects to be stored in JNDI as properties
 */

public abstract class JNDIBaseStorable implements JNDIStorableInterface, Externalizable {

    private Properties properties;

    /**
     * Set the properties that will represent the instance in JNDI
     * 
     * @param props
     */
    protected abstract void buildFromProperties(Properties props);

    /**
     * Initialize the instance from properties stored in JNDI
     * 
     * @param props
     */

    protected abstract void populateProperties(Properties props);

    /**
     * set the properties for this instance as retrieved from JNDI
     * 
     * @param props
     */

    public synchronized void setProperties(Properties props) {
        this.properties = props;
        buildFromProperties(props);
    }

    /**
     * Get the properties from this instance for storing in JNDI
     * 
     * @return the properties
     */

    public synchronized Properties getProperties() {
        if (this.properties == null) {
            this.properties = new Properties();
        }
        populateProperties(this.properties);
        return this.properties;
    }

    /**
     * Retrive a Reference for this instance to store in JNDI
     * 
     * @return the built Reference
     * @throws NamingException if error on building Reference
     */
    public Reference getReference() throws NamingException {
        return JNDIReferenceFactory.createReference(this.getClass().getName(), this);
    }

    /**
     * @param in
     * @throws IOException
     * @throws ClassNotFoundException
     * @see java.io.Externalizable#readExternal(java.io.ObjectInput)
     */
    public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
        Properties props = (Properties)in.readObject();
        if (props != null) {
            setProperties(props);
        }

    }

    /**
     * @param out
     * @throws IOException
     * @see java.io.Externalizable#writeExternal(java.io.ObjectOutput)
     */
    public void writeExternal(ObjectOutput out) throws IOException {
        out.writeObject(getProperties());

    }

}