/**
* 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.component.jpa;
import java.util.Iterator;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceException;
import org.apache.camel.Exchange;
import org.apache.camel.Expression;
import org.apache.camel.impl.DefaultProducer;
import org.apache.camel.util.ObjectHelper;
import org.springframework.orm.jpa.JpaCallback;
/**
* @version $Revision: 769677 $
*/
public class JpaProducer extends DefaultProducer<Exchange> {
private final TransactionStrategy template;
private final JpaEndpoint endpoint;
private final Expression<Exchange> expression;
public JpaProducer(JpaEndpoint endpoint, Expression<Exchange> expression) {
super(endpoint);
this.endpoint = endpoint;
this.expression = expression;
this.template = endpoint.createTransactionStrategy();
}
public void process(Exchange exchange) {
final Object values = expression.evaluate(exchange);
if (values != null) {
template.execute(new JpaCallback() {
public Object doInJpa(EntityManager entityManager) throws PersistenceException {
Iterator iter = ObjectHelper.createIterator(values);
while (iter.hasNext()) {
Object value = iter.next();
entityManager.merge(value);
}
if (endpoint.isFlushOnSend()) {
entityManager.flush();
}
return null;
}
});
}
exchange.setProperty("CamelJpaValue", values);
}
}