/** 
 * 
 * Copyright 2004 Protique Ltd
 * 
 * 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 org.activemq.management;

import javax.jms.Message;

/**
 * A simple interface to allow statistics gathering to be easily switched out
 * for performance reasons.
 *
 * @version $Revision: 1.1.1.1 $
 */
public interface JMSDestinationStats {
    /**
     * On startup sets the pending message count
     *
     * @param count
     */
    public void setPendingMessageCountOnStartup(long count);

    /**
     * On a message send to this destination, update the producing stats
     *
     * @param message
     */
    public void onMessageSend(Message message);

    /**
     * On a consume from this destination, updates the consumed states
     */
    public void onMessageAck();
}
