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.model;
018    
019    import java.util.List;
020    
021    import javax.persistence.Entity;
022    import javax.persistence.GeneratedValue;
023    import javax.persistence.Id;
024    import javax.persistence.UniqueConstraint;
025    
026    import org.apache.camel.util.ObjectHelper;
027    import org.apache.commons.logging.Log;
028    import org.apache.commons.logging.LogFactory;
029    
030    import org.springframework.orm.jpa.JpaTemplate;
031    
032    /**
033     * @version $Revision: 1.1 $
034     */
035    @Entity
036    @UniqueConstraint(columnNames = {"name" })
037    public class ProcessDefinition extends EntitySupport {
038        private static final transient Log LOG = LogFactory.getLog(ProcessDefinition.class);
039        private String name;
040    
041        // This crap is required to work around a bug in hibernate
042        @Override
043        @Id
044        @GeneratedValue
045        public Long getId() {
046            return super.getId();
047        }
048    
049        public String getName() {
050            return name;
051        }
052    
053        public void setName(String name) {
054            this.name = name;
055        }
056    
057        public static ProcessDefinition getRefreshedProcessDefinition(JpaTemplate template, ProcessDefinition definition) {
058            // TODO refresh doesn't tend to work - maybe its a spring thing?
059            // template.refresh(definition);
060    
061            ObjectHelper.notNull(definition, "definition");
062            Long id = definition.getId();
063            if (id == null) {
064                LOG.warn("No primary key is available!");
065                return findOrCreateProcessDefinition(template, definition.getName());
066            }
067            definition = template.find(ProcessDefinition.class, id);
068            return definition;
069        }
070    
071        public static ProcessDefinition findOrCreateProcessDefinition(JpaTemplate template, String processName) {
072            List<ProcessDefinition> list = template.find("select x from " + ProcessDefinition.class.getName() + " x where x.name = ?1", processName);
073            if (!list.isEmpty()) {
074                return list.get(0);
075            } else {
076                ProcessDefinition answer = new ProcessDefinition();
077                answer.setName(processName);
078                template.persist(answer);
079                return answer;
080            }
081        }
082    }