/**
* 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.processor;
import org.apache.camel.Exchange;
import org.apache.camel.Processor;
import org.apache.camel.impl.DefaultUnitOfWork;
import static org.apache.camel.util.ObjectHelper.wrapRuntimeCamelException;
/**
* Handles calling the UnitOfWork.done() method when processing of an exchange
* is complete.
*/
public final class UnitOfWorkProcessor extends DelegateProcessor {
public UnitOfWorkProcessor(Processor processor) {
super(processor);
}
@Override
public String toString() {
return "UnitOfWork(" + processor + ")";
}
@Override
protected void processNext(Exchange exchange) throws Exception {
if (exchange.getUnitOfWork() == null) {
// If there is no existing UoW, then we should start one and
// terminate it once processing is completed for the exchange.
final DefaultUnitOfWork uow = new DefaultUnitOfWork(exchange);
exchange.setUnitOfWork(uow);
try {
uow.start();
} catch (Exception e) {
throw wrapRuntimeCamelException(e);
}
// process the exchange
try {
processor.process(exchange);
} catch (Exception e) {
exchange.setException(e);
}
// unit of work is done
exchange.getUnitOfWork().done(exchange);
try {
uow.stop();
} catch (Exception e) {
throw wrapRuntimeCamelException(e);
}
exchange.setUnitOfWork(null);
} else {
// There was an existing UoW, so we should just pass through..
// so that the guy the initiated the UoW can terminate it.
processor.process(exchange);
}
}
}