我正在使用JMS代理,创建MessageProducers的速度很慢/昂贵。 因此,我决定将MessageProducer缓存在无状态会话Bean中。 这非常适用于非事务性情况,但是在使用容器管理XA事务时遇到问题 - 邮件已发送,但不是作为事务的一部分。 知道出了什么问题吗?
有问题的代码:
@Stateless(name = "MyProducerSessionBean")
@TransactionManagement(value = TransactionManagementType.CONTAINER)
@TransactionAttribute(value = TransactionAttributeType.REQUIRED)
public class MyProducerSessionBean implements MyProducerSessionBeanLocal
{
@Resource(name = "java:/jms/myConnectionFactory")
ConnectionFactory myConnectionFactory;
@Resource(name = "java:/jms/myOutputQueue")
Queue myOutputQueue;
Connection connection;
Session session;
MessageProducer producer;
public MyProducerSessionBean() {}
@PostConstruct
public void ejbCreate() {
try {
connection = myConnectionFactory.createConnection();
session = connection.createSession(true, Session.AUTO_ACKNOWLEDGE);
producer = session.createProducer(myOutputQueue);
} catch (JMSException e) {
cleanup();
throw new EJBException(e);
}
}
@TransactionAttribute(value = TransactionAttributeType.REQUIRED)
@Override
public void sendMessage() {
try {
ObjectMessage message = session.createObjectMessage("test");
producer.send(message);
} catch (JMSException e) {
cleanup();
throw new EJBException(e);
}
}
@PreDestroy
public void ejbRemove() {
cleanup();
}
public void cleanup() {
try {
if(producer != null) producer.close();
} catch (JMSException e) {
e.printStackTrace();
}
try {
if(session != null) session.close();
} catch (JMSException e) {
e.printStackTrace();
}
try {
if(connection != null) connection.close();
} catch (JMSException e) {
e.printStackTrace();
}
producer = null;
session = null;
connection = null;
}
}
当我在sendMessage()方法中创建连接时,一切正常,而不是在@PostConstruct中缓存生成器:
@Stateless(name = "MyProducerSessionBean")
@TransactionManagement(value = TransactionManagementType.CONTAINER)
@TransactionAttribute(value = TransactionAttributeType.REQUIRED)
public class MyProducerSessionBean implements MyProducerSessionBeanLocal
{
@Resource(name = "java:/jms/myConnectionFactory")
ConnectionFactory myConnectionFactory;
@Resource(name = "java:/jms/myOutputQueue")
Queue myOutputQueue;
public MyProducerSessionBean() {}
@TransactionAttribute(value = TransactionAttributeType.REQUIRED)
@Override
public void sendMessage() {
try {
Connection connection = myConnectionFactory.createConnection();
Session session = connection.createSession(true, Session.AUTO_ACKNOWLEDGE);
MessageProducer producer = session.createProducer(myOutputQueue);
ObjectMessage message = session.createObjectMessage("test");
producer.send(message);
producer.close();
session.close();
connection.close();
} catch (JMSException e) {
e.printStackTrace();
throw new EJBException(e);
}
}
}