/**
* 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.util;
import java.util.HashMap;
import java.util.Map;
import org.apache.camel.AsyncCallback;
import org.apache.camel.Endpoint;
import org.apache.camel.Exchange;
import org.apache.camel.ExchangePattern;
import org.apache.camel.FailedToCreateProducerException;
import org.apache.camel.Processor;
import org.apache.camel.Producer;
import org.apache.camel.RuntimeCamelException;
import org.apache.camel.impl.ServiceSupport;
import org.apache.camel.impl.converter.AsyncProcessorTypeConverter;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* @version $Revision: 642753 $
*/
public class ProducerCache<E extends Exchange> extends ServiceSupport {
private static final Log LOG = LogFactory.getLog(ProducerCache.class);
private Map<String, Producer<E>> producers = new HashMap<String, Producer<E>>();
public synchronized Producer<E> getProducer(Endpoint<E> endpoint) {
String key = endpoint.getEndpointUri();
Producer<E> answer = producers.get(key);
if (answer == null) {
try {
answer = endpoint.createProducer();
answer.start();
} catch (Exception e) {
throw new FailedToCreateProducerException(endpoint, e);
}
producers.put(key, answer);
}
return answer;
}
/**
* Sends the exchange to the given endpoint
*
* @param endpoint the endpoint to send the exchange to
* @param exchange the exchange to send
*/
public void send(Endpoint<E> endpoint, E exchange) {
try {
Producer<E> producer = getProducer(endpoint);
producer.process(exchange);
} catch (Exception e) {
throw new RuntimeCamelException(e);
}
}
/**
* Sends an exchange to an endpoint using a supplied
* {@link Processor} to populate the exchange
*
* @param endpoint the endpoint to send the exchange to
* @param processor the transformer used to populate the new exchange
*/
public E send(Endpoint<E> endpoint, Processor processor) {
try {
Producer<E> producer = getProducer(endpoint);
E exchange = producer.createExchange();
return sendExchange(endpoint, producer, processor, exchange);
} catch (Exception e) {
throw new RuntimeCamelException(e);
}
}
/**
* Sends an exchange to an endpoint using a supplied
* {@link Processor} to populate the exchange. The callback
* will be called when the exchange is completed.
*
* @param endpoint the endpoint to send the exchange to
* @param processor the transformer used to populate the new exchange
*/
public E send(Endpoint<E> endpoint, Processor processor, AsyncCallback callback) {
try {
Producer<E> producer = getProducer(endpoint);
E exchange = producer.createExchange();
boolean sync = sendExchange(endpoint, producer, processor, exchange, callback);
setProcessedSync(exchange, sync);
return exchange;
} catch (Exception e) {
throw new RuntimeCamelException(e);
}
}
public static boolean isProcessedSync(Exchange exchange) {
Boolean rc = exchange.getProperty(ProducerCache.class.getName() + ".SYNC", Boolean.class);
return rc == null ? false : rc;
}
public static void setProcessedSync(Exchange exchange, boolean b) {
exchange.setProperty(ProducerCache.class.getName() + ".SYNC", b ? Boolean.TRUE : Boolean.FALSE);
}
/**
* Sends an exchange to an endpoint using a supplied
* {@link Processor} to populate the exchange
*
* @param endpoint the endpoint to send the exchange to
* @param pattern the message {@link ExchangePattern} such as
* {@link ExchangePattern#InOnly} or {@link ExchangePattern#InOut}
* @param processor the transformer used to populate the new exchange
*/
public E send(Endpoint<E> endpoint, ExchangePattern pattern, Processor processor) {
try {
Producer<E> producer = getProducer(endpoint);
E exchange = producer.createExchange(pattern);
return sendExchange(endpoint, producer, processor, exchange);
} catch (Exception e) {
throw new RuntimeCamelException(e);
}
}
protected E sendExchange(Endpoint<E> endpoint, Producer<E> producer, Processor processor, E exchange) throws Exception {
// lets populate using the processor callback
processor.process(exchange);
// now lets dispatch
if (LOG.isDebugEnabled()) {
LOG.debug(">>>> " + endpoint + " " + exchange);
}
producer.process(exchange);
return exchange;
}
protected boolean sendExchange(Endpoint<E> endpoint, Producer<E> producer, Processor processor, E exchange, AsyncCallback callback) throws Exception {
// lets populate using the processor callback
processor.process(exchange);
// now lets dispatch
if (LOG.isDebugEnabled()) {
LOG.debug(">>>> " + endpoint + " " + exchange);
}
return AsyncProcessorTypeConverter.convert(producer).process(exchange, callback);
}
protected void doStop() throws Exception {
ServiceHelper.stopServices(producers.values());
}
protected void doStart() throws Exception {
}
}