org.apache.stratos.messaging.event.EventObservable.java Source code

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Here is the source code for org.apache.stratos.messaging.event.EventObservable.java

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/*
 * 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.stratos.messaging.event;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.stratos.messaging.listener.EventListener;

import java.util.Observable;

/**
 *  Event observable definition.
 */
public abstract class EventObservable extends Observable {

    private static final Log log = LogFactory.getLog(EventObservable.class);

    public void addEventListener(EventListener eventListener) {
        addObserver(eventListener);
    }

    public void removeEventListener(EventListener eventListener) {
        if (log.isDebugEnabled()) {
            log.debug(String.format("Removing event listeners: [event-listener] %s",
                    eventListener.getClass().getName()));
        }
        deleteObserver(eventListener);
    }

    public void notifyEventListeners(Event event) {
        if (log.isDebugEnabled()) {
            log.debug(String.format("Notifying event listeners: [event] %s", event.getClass().getName()));
        }
        setChanged();
        notifyObservers(event);
    }
}