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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.qpid.client;
import org.apache.qpid.AMQException;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageListener;
import javax.jms.Topic;
import javax.jms.TopicSubscriber;
/**
* Wraps a MessageConsumer to fulfill the extended TopicSubscriber contract
*
*/
class TopicSubscriberAdaptor<C extends BasicMessageConsumer> implements TopicSubscriber
{
private final Topic _topic;
private final C _consumer;
private final boolean _noLocal;
TopicSubscriberAdaptor(Topic topic, C consumer, boolean noLocal)
{
_topic = topic;
_consumer = consumer;
_noLocal = noLocal;
}
TopicSubscriberAdaptor(Topic topic, C consumer)
{
this(topic, consumer, consumer.isNoLocal());
}
public Topic getTopic() throws JMSException
{
checkPreConditions();
return _topic;
}
public boolean getNoLocal() throws JMSException
{
checkPreConditions();
return _noLocal;
}
public String getMessageSelector() throws JMSException
{
checkPreConditions();
return _consumer.getMessageSelector();
}
public MessageListener getMessageListener() throws JMSException
{
checkPreConditions();
return _consumer.getMessageListener();
}
public void setMessageListener(MessageListener messageListener) throws JMSException
{
checkPreConditions();
_consumer.setMessageListener(messageListener);
}
public Message receive() throws JMSException
{
checkPreConditions();
return _consumer.receive();
}
public Message receive(long l) throws JMSException
{
return _consumer.receive(l);
}
public Message receiveNoWait() throws JMSException
{
checkPreConditions();
return _consumer.receiveNoWait();
}
public void close() throws JMSException
{
_consumer.close();
}
private void checkPreConditions() throws javax.jms.IllegalStateException{
C msgConsumer = _consumer;
if (msgConsumer.isClosed() ){
throw new javax.jms.IllegalStateException("Consumer is closed");
}
if(_topic == null){
throw new UnsupportedOperationException("Topic is null");
}
AMQSession session = msgConsumer.getSession();
if(session == null || session.isClosed()){
throw new javax.jms.IllegalStateException("Invalid Session");
}
}
C getMessageConsumer()
{
return _consumer;
}
public void addBindingKey(Topic topic, String bindingKey) throws AMQException
{
_consumer.addBindingKey((AMQDestination) topic, bindingKey);
}
}
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