001 /**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017 package org.apache.camel.bam.processor;
018
019 import org.apache.camel.Exchange;
020 import org.apache.camel.Expression;
021 import org.apache.camel.Processor;
022 import org.apache.camel.bam.model.ActivityState;
023 import org.apache.camel.bam.model.ProcessInstance;
024 import org.apache.camel.bam.rules.ActivityRules;
025 import org.apache.commons.logging.Log;
026 import org.apache.commons.logging.LogFactory;
027 import org.springframework.orm.jpa.JpaTemplate;
028 import org.springframework.transaction.support.TransactionTemplate;
029
030 /**
031 * A concrete {@link Processor} for working on <a
032 * href="http://activemq.apache.org/camel/bam.html">BAM</a> which uses JPA as
033 * the persistence and uses the {@link ProcessInstance} entity to store the
034 * process information.
035 *
036 * @version $Revision: $
037 */
038 public class JpaBamProcessor extends JpaBamProcessorSupport<ProcessInstance> {
039 private static final transient Log LOG = LogFactory.getLog(JpaBamProcessor.class);
040
041 public JpaBamProcessor(TransactionTemplate transactionTemplate, JpaTemplate template, Expression<Exchange> correlationKeyExpression, ActivityRules activityRules) {
042 super(transactionTemplate, template, correlationKeyExpression, activityRules);
043 }
044
045 public JpaBamProcessor(TransactionTemplate transactionTemplate, JpaTemplate template, Expression<Exchange> correlationKeyExpression,
046 ActivityRules activityRules, Class<ProcessInstance> entitytype) {
047 super(transactionTemplate, template, correlationKeyExpression, activityRules, entitytype);
048 }
049
050 protected void processEntity(Exchange exchange, ProcessInstance process) throws Exception {
051 if (LOG.isDebugEnabled()) {
052 LOG.debug("Processing process instance: " + process);
053 }
054
055 // lets force the lazy creation of this activity
056 ActivityRules rules = getActivityRules();
057 ActivityState state = process.getOrCreateActivityState(rules);
058
059 state.processExchange(rules, new ProcessContext(exchange, rules, state));
060
061 rules.getProcessRules().processExchange(exchange, process);
062 }
063 }