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/*******************************************************************************
* ============LICENSE_START=======================================================
* org.onap.dmaap
* ================================================================================
* Copyright © 2017 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*
* ECOMP is a trademark and service mark of AT&T Intellectual Property.
*
*******************************************************************************/
package org.onap.dmaap.messagerouter.msgrtr.nsa.cambria.backends.memory;
import java.util.ArrayList;
import java.util.Collection;
import org.onap.dmaap.messagerouter.msgrtr.nsa.cambria.backends.Consumer;
import org.onap.dmaap.messagerouter.msgrtr.nsa.cambria.backends.ConsumerFactory;
/**
*
* @author author
*
*/
public class MemoryConsumerFactory implements ConsumerFactory
{
/**
*
* Initializing constructor
* @param q
*/
public MemoryConsumerFactory ( MemoryQueue q )
{
fQueue = q;
}
/**
*
* @param topic
* @param consumerGroupId
* @param clientId
* @param timeoutMs
* @return Consumer
*/
@Override
public Consumer getConsumerFor ( String topic, String consumerGroupId, String clientId, int timeoutMs )
{
return new MemoryConsumer ( topic, consumerGroupId );
}
private final MemoryQueue fQueue;
/**
*
* Define nested inner class
*
*/
private class MemoryConsumer implements Consumer
{
/**
*
* Initializing MemoryConsumer constructor
* @param topic
* @param consumer
*
*/
public MemoryConsumer ( String topic, String consumer )
{
fTopic = topic;
fConsumer = consumer;
fCreateMs = System.currentTimeMillis ();
fLastAccessMs = fCreateMs;
}
@Override
/**
*
* return consumer details
*/
public Message nextMessage ()
{
return fQueue.get ( fTopic, fConsumer );
}
private final String fTopic;
private final String fConsumer;
private final long fCreateMs;
private long fLastAccessMs;
@Override
public void close() {
//Nothing to close/clean up.
}
/**
*
*/
public void commitOffsets()
{
// ignoring this aspect
}
/**
* get offset
*/
public long getOffset()
{
return 0;
}
@Override
/**
* get consumer topic name
*/
public String getName ()
{
return fTopic + "/" + fConsumer;
}
@Override
public long getCreateTimeMs ()
{
return fCreateMs;
}
@Override
public long getLastAccessMs ()
{
return fLastAccessMs;
}
}
@Override
public void destroyConsumer(String topic, String consumerGroupId,
String clientId) {
//No cache for memory consumers, so NOOP
}
@Override
public void dropCache ()
{
// nothing to do - there's no cache here
}
@Override
/**
* @return ArrayList<MemoryConsumer>
*/
public Collection<? extends Consumer> getConsumers ()
{
return new ArrayList<MemoryConsumer> ();
}
}
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