| /** |
| * 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.idempotent.jpa; |
| |
| import java.util.Date; |
| import java.util.List; |
| import javax.persistence.EntityManagerFactory; |
| import javax.persistence.Persistence; |
| |
| import org.apache.camel.impl.ServiceSupport; |
| import org.apache.camel.spi.IdempotentRepository; |
| import org.springframework.jmx.export.annotation.ManagedAttribute; |
| import org.springframework.jmx.export.annotation.ManagedOperation; |
| import org.springframework.jmx.export.annotation.ManagedResource; |
| import org.springframework.orm.jpa.JpaTemplate; |
| import org.springframework.orm.jpa.JpaTransactionManager; |
| import org.springframework.transaction.TransactionDefinition; |
| import org.springframework.transaction.TransactionStatus; |
| import org.springframework.transaction.support.TransactionCallback; |
| import org.springframework.transaction.support.TransactionTemplate; |
| |
| /** |
| * @version |
| */ |
| @ManagedResource("JpaMessageIdRepository") |
| public class JpaMessageIdRepository extends ServiceSupport implements IdempotentRepository<String> { |
| protected static final String QUERY_STRING = "select x from " + MessageProcessed.class.getName() + " x where x.processorName = ?1 and x.messageId = ?2"; |
| private final JpaTemplate jpaTemplate; |
| private final String processorName; |
| private final TransactionTemplate transactionTemplate; |
| |
| public JpaMessageIdRepository(JpaTemplate template, String processorName) { |
| this(template, createTransactionTemplate(template), processorName); |
| } |
| |
| public JpaMessageIdRepository(JpaTemplate template, TransactionTemplate transactionTemplate, String processorName) { |
| this.jpaTemplate = template; |
| this.processorName = processorName; |
| this.transactionTemplate = transactionTemplate; |
| } |
| |
| public static JpaMessageIdRepository jpaMessageIdRepository(String persistenceUnit, String processorName) { |
| EntityManagerFactory entityManagerFactory = Persistence.createEntityManagerFactory(persistenceUnit); |
| return jpaMessageIdRepository(new JpaTemplate(entityManagerFactory), processorName); |
| } |
| |
| public static JpaMessageIdRepository jpaMessageIdRepository(JpaTemplate jpaTemplate, String processorName) { |
| return new JpaMessageIdRepository(jpaTemplate, processorName); |
| } |
| |
| private static TransactionTemplate createTransactionTemplate(JpaTemplate jpaTemplate) { |
| TransactionTemplate transactionTemplate = new TransactionTemplate(); |
| transactionTemplate.setTransactionManager(new JpaTransactionManager(jpaTemplate.getEntityManagerFactory())); |
| transactionTemplate.setPropagationBehavior(TransactionDefinition.PROPAGATION_REQUIRED); |
| return transactionTemplate; |
| } |
| |
| @ManagedOperation(description = "Adds the key to the store") |
| @SuppressWarnings("unchecked") |
| public boolean add(final String messageId) { |
| // Run this in single transaction. |
| Boolean rc = (Boolean)transactionTemplate.execute(new TransactionCallback() { |
| public Object doInTransaction(TransactionStatus arg0) { |
| List list = jpaTemplate.find(QUERY_STRING, processorName, messageId); |
| if (list.isEmpty()) { |
| MessageProcessed processed = new MessageProcessed(); |
| processed.setProcessorName(processorName); |
| processed.setMessageId(messageId); |
| processed.setCreatedAt(new Date()); |
| jpaTemplate.persist(processed); |
| jpaTemplate.flush(); |
| return Boolean.TRUE; |
| } else { |
| return Boolean.FALSE; |
| } |
| } |
| }); |
| return rc.booleanValue(); |
| } |
| |
| @ManagedOperation(description = "Does the store contain the given key") |
| @SuppressWarnings("unchecked") |
| public boolean contains(final String messageId) { |
| // Run this in single transaction. |
| Boolean rc = (Boolean)transactionTemplate.execute(new TransactionCallback() { |
| public Object doInTransaction(TransactionStatus arg0) { |
| List list = jpaTemplate.find(QUERY_STRING, processorName, messageId); |
| if (list.isEmpty()) { |
| return Boolean.FALSE; |
| } else { |
| return Boolean.TRUE; |
| } |
| } |
| }); |
| return rc.booleanValue(); |
| } |
| |
| @ManagedOperation(description = "Remove the key from the store") |
| @SuppressWarnings("unchecked") |
| public boolean remove(final String messageId) { |
| Boolean rc = (Boolean)transactionTemplate.execute(new TransactionCallback() { |
| public Object doInTransaction(TransactionStatus arg0) { |
| List list = jpaTemplate.find(QUERY_STRING, processorName, messageId); |
| if (list.isEmpty()) { |
| return Boolean.FALSE; |
| } else { |
| MessageProcessed processoed = (MessageProcessed) list.get(0); |
| jpaTemplate.remove(processoed); |
| jpaTemplate.flush(); |
| return Boolean.TRUE; |
| } |
| } |
| }); |
| return rc.booleanValue(); |
| } |
| |
| public boolean confirm(String s) { |
| // noop |
| return true; |
| } |
| |
| @ManagedAttribute(description = "The processor name") |
| public String getProcessorName() { |
| return processorName; |
| } |
| |
| @Override |
| protected void doStart() throws Exception { |
| } |
| |
| @Override |
| protected void doStop() throws Exception { |
| } |
| } |