org.apache.camel.impl.EmptyConsumerCache 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.camel.impl;
import org.apache.camel.CamelContext;
import org.apache.camel.Endpoint;
import org.apache.camel.FailedToCreateConsumerException;
import org.apache.camel.IsSingleton;
import org.apache.camel.PollingConsumer;
import org.apache.camel.util.ObjectHelper;
import org.apache.camel.util.ServiceHelper;
/**
* A {@link ConsumerCache} which is always empty and does not cache any {@link org.apache.camel.Consumer}s.
*/
public class EmptyConsumerCache extends ConsumerCache {
public EmptyConsumerCache(Object source, CamelContext camelContext) {
super(source, camelContext, 0);
}
@Override
public PollingConsumer acquirePollingConsumer(Endpoint endpoint) {
// always create a new consumer
PollingConsumer answer;
try {
answer = endpoint.createPollingConsumer();
boolean singleton = true;
if (answer instanceof IsSingleton) {
singleton = ((IsSingleton) answer).isSingleton();
}
if (getCamelContext().isStartingRoutes() && singleton) {
// if we are currently starting a route, then add as service and enlist in JMX
// - but do not enlist non-singletons in JMX
// - note addService will also start the service
getCamelContext().addService(answer);
} else {
// must then start service so producer is ready to be used
ServiceHelper.startService(answer);
}
} catch (Exception e) {
throw new FailedToCreateConsumerException(endpoint, e);
}
return answer;
}
@Override
public void releasePollingConsumer(Endpoint endpoint, PollingConsumer pollingConsumer) {
// stop and shutdown the consumer as its not cache or reused
try {
ServiceHelper.stopAndShutdownService(pollingConsumer);
} catch (Exception e) {
throw ObjectHelper.wrapRuntimeCamelException(e);
}
}
@Override
public String toString() {
return "EmptyConsumerCache for source: " + getSource();
}
}