| /** |
| * 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.Map; |
| import javax.persistence.EntityManagerFactory; |
| |
| import org.apache.camel.Endpoint; |
| import org.apache.camel.impl.UriEndpointComponent; |
| import org.apache.camel.util.ObjectHelper; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.springframework.transaction.PlatformTransactionManager; |
| import org.springframework.transaction.support.TransactionTemplate; |
| |
| /** |
| * A JPA Component |
| * |
| * @version |
| */ |
| public class JpaComponent extends UriEndpointComponent { |
| private static final Logger LOG = LoggerFactory.getLogger(JpaComponent.class); |
| private EntityManagerFactory entityManagerFactory; |
| private PlatformTransactionManager transactionManager; |
| private boolean joinTransaction = true; |
| |
| public JpaComponent() { |
| super(JpaEndpoint.class); |
| } |
| |
| // Properties |
| //------------------------------------------------------------------------- |
| public EntityManagerFactory getEntityManagerFactory() { |
| return entityManagerFactory; |
| } |
| |
| public void setEntityManagerFactory(EntityManagerFactory entityManagerFactory) { |
| this.entityManagerFactory = entityManagerFactory; |
| } |
| |
| public PlatformTransactionManager getTransactionManager() { |
| return transactionManager; |
| } |
| |
| public void setTransactionManager(PlatformTransactionManager transactionManager) { |
| this.transactionManager = transactionManager; |
| } |
| |
| // Implementation methods |
| //------------------------------------------------------------------------- |
| |
| @Override |
| protected Endpoint createEndpoint(String uri, String path, Map<String, Object> options) throws Exception { |
| JpaEndpoint endpoint = new JpaEndpoint(uri, this); |
| endpoint.setJoinTransaction(isJoinTransaction()); |
| |
| // lets interpret the next string as a class |
| if (ObjectHelper.isNotEmpty(path)) { |
| // provide the class loader of this component to work in OSGi environments as camel-jpa must be able |
| // to resolve the entity classes |
| Class<?> type = getCamelContext().getClassResolver().resolveClass(path, JpaComponent.class.getClassLoader()); |
| if (type != null) { |
| endpoint.setEntityType(type); |
| } |
| } |
| return endpoint; |
| } |
| |
| @Override |
| protected void doStart() throws Exception { |
| super.doStart(); |
| |
| // lookup entity manager factory and use it if only one provided |
| if (entityManagerFactory == null) { |
| Map<String, EntityManagerFactory> map = getCamelContext().getRegistry().findByTypeWithName(EntityManagerFactory.class); |
| if (map != null) { |
| if (map.size() == 1) { |
| entityManagerFactory = map.values().iterator().next(); |
| LOG.info("Using EntityManagerFactory found in registry with id [" |
| + map.keySet().iterator().next() + "] " + entityManagerFactory); |
| } else { |
| LOG.debug("Could not find a single EntityManagerFactory in registry as there was " + map.size() + " instances."); |
| } |
| } |
| } else { |
| LOG.info("Using EntityManagerFactory configured: " + entityManagerFactory); |
| } |
| |
| // lookup transaction manager and use it if only one provided |
| if (transactionManager == null) { |
| Map<String, PlatformTransactionManager> map = getCamelContext().getRegistry().findByTypeWithName(PlatformTransactionManager.class); |
| if (map != null) { |
| if (map.size() == 1) { |
| transactionManager = map.values().iterator().next(); |
| LOG.info("Using TransactionManager found in registry with id [" |
| + map.keySet().iterator().next() + "] " + transactionManager); |
| } else { |
| LOG.debug("Could not find a single TransactionManager in registry as there was " + map.size() + " instances."); |
| } |
| } |
| } else { |
| LOG.info("Using TransactionManager configured on this component: " + transactionManager); |
| } |
| |
| // transaction manager could also be hidden in a template |
| if (transactionManager == null) { |
| Map<String, TransactionTemplate> map = getCamelContext().getRegistry().findByTypeWithName(TransactionTemplate.class); |
| if (map != null) { |
| if (map.size() == 1) { |
| transactionManager = map.values().iterator().next().getTransactionManager(); |
| LOG.info("Using TransactionManager found in registry with id [" |
| + map.keySet().iterator().next() + "] " + transactionManager); |
| } else { |
| LOG.debug("Could not find a single TransactionTemplate in registry as there was " + map.size() + " instances."); |
| } |
| } |
| } |
| |
| // warn about missing configuration |
| if (entityManagerFactory == null) { |
| LOG.warn("No EntityManagerFactory has been configured on this JpaComponent. Each JpaEndpoint will auto create their own EntityManagerFactory."); |
| } |
| if (transactionManager == null) { |
| LOG.warn("No TransactionManager has been configured on this JpaComponent. Each JpaEndpoint will auto create their own JpaTransactionManager."); |
| } |
| } |
| |
| public boolean isJoinTransaction() { |
| return joinTransaction; |
| } |
| |
| public void setJoinTransaction(boolean joinTransaction) { |
| this.joinTransaction = joinTransaction; |
| } |
| } |