据我了解,需要J2EE容器才能包含JMS提供程序。一个独立的Java应用程序是否可以将消息发送到容器提供的JMS队列?如果是这样,我如何从容器外部访问JNDI查找?
(如果有任何区别,我正在尝试与Geronimo一起使用,但是我希望有一种标准的方法来执行此操作。)
您应该能够在Geronimo中创建一个使用JNDI服务器的InitialContext。然后,您可以使用它来查找JMS连接工厂和队列。
下面的示例改编自http://forums.sun.com/thread.jspa?threadID=5283256以使用Geronimo JNDI Factory。
Context jndiContext = null;
ConnectionFactory connectionFactory = null;
Connection connection = null;
Session session = null;
Queue queue = null;
MessageProducer messageProducer = null;
try
{
//[1] Create a JNDI API InitialContext object.
Hashtable properties = new Hashtable(2);
// CHANGE these to match Geronimos JNDI service
properties.put(Context.INITIAL_CONTEXT_FACTORY, "org.apache.openejb.client.RemoteInitialContextFactory");
properties.put(Context.PROVIDER_URL, "ejbd://127.0.0.1:4201");
jndiContext = new InitialContext(properties);
//[2] Look up connection factory and queue.
connectionFactory = (ConnectionFactory)jndiContext.lookup("jms/ConnectionFactory");
queue = (Queue)jndiContext.lookup("jms/Queue");
//[3]
// - Create connection
// - Create session from connection; false means session is not transacted.
// - Create sender and text message.
// - Send messages, varying text slightly.
connection = connectionFactory.createConnection();
session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
messageProducer = session.createProducer(queue);
//send a message
TextMessage message = session.createTextMessage(this.jTextSend.getText());
messageProducer.send(message);
//example for send some object
//ObjectMessage message = session.createObjectMessage();
//MyObj myObj = new MyObj ("Name"); //this class must be serializable
//message.setObject(myObj );
//messageProducer.send(message);
}
catch(Exception ex)
{
LOG.error(ex);
}
finally
{
if(connection !=null)
{
try
{
connection.close();
}
catch(JMSException e)
{
LOG.error(e);
}
}
}
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