org.apache.activemq.ActiveMQQueueReceiver Maven / Gradle / Ivy
/**
* 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;
import javax.jms.JMSException;
import javax.jms.Queue;
import javax.jms.QueueReceiver;
import org.apache.activemq.command.ActiveMQDestination;
import org.apache.activemq.command.ConsumerId;
/**
* A client uses a QueueReceiver object to receive messages that
* have been delivered to a queue.
*
* Although it is possible to have multiple QueueReceiver s for
* the same queue, the JMS API does not define how messages are distributed
* between the QueueReceivers.
*
* If a QueueReceiver specifies a message selector, the messages
* that are not selected remain on the queue. By definition, a message selector
* allows a QueueReceiver to skip messages. This means that when
* the skipped messages are eventually read, the total ordering of the reads
* does not retain the partial order defined by each message producer. Only
* QueueReceiver s without a message selector will read messages
* in message producer order.
*
* Creating a MessageConsumer provides the same features as
* creating a QueueReceiver. A MessageConsumer
* object is recommended for creating new code. The QueueReceiver
*
* is provided to support existing code.
*
* @see javax.jms.Session#createConsumer(javax.jms.Destination, String)
* @see javax.jms.Session#createConsumer(javax.jms.Destination)
* @see javax.jms.QueueSession#createReceiver(Queue, String)
* @see javax.jms.QueueSession#createReceiver(Queue)
* @see javax.jms.MessageConsumer
*/
public class ActiveMQQueueReceiver extends ActiveMQMessageConsumer implements QueueReceiver {
/**
* @param theSession
* @param consumerId
* @param destination
* @param selector
* @param prefetch
* @param maximumPendingMessageCount
* @param asyncDispatch
*
* @throws JMSException
*/
protected ActiveMQQueueReceiver(ActiveMQSession theSession, ConsumerId consumerId,
ActiveMQDestination destination, String selector, int prefetch,
int maximumPendingMessageCount, boolean asyncDispatch) throws JMSException {
super(theSession, consumerId, destination, null, selector, prefetch, maximumPendingMessageCount,
false, false, asyncDispatch, null);
}
/**
* Gets the Queue associated with this queue receiver.
*
* @return this receiver's Queue
* @throws JMSException if the JMS provider fails to get the queue for this
* queue receiver due to some internal error.
*/
@Override
public Queue getQueue() throws JMSException {
checkClosed();
return (Queue)super.getDestination();
}
}