我在用Jboss 4.0.2 GA
我正在使用中定义的 testTopicjbossmq-destinations-service
<mbean code="org.jboss.mq.server.jmx.Topic"
name="jboss.mq.destination:service=Topic,name=testTopic">
<depends optional-attribute-name="DestinationManager">jboss.mq:service=DestinationManager</depends>
<depends optional-attribute-name="SecurityManager">jboss.mq:service=SecurityManager</depends>
<attribute name="SecurityConf">
<security>
<role name="guest" read="true" write="true"/>
<role name="publisher" read="true" write="true" create="false"/>
<role name="durpublisher" read="true" write="true" create="true"/>
</security>
</attribute>
<attribute name="RedeliveryDelay">0</attribute>
</mbean>
我为发布者和订阅者编写了相同的文件::
package com.nagarro.client;
import javax.jms.*;
import javax.naming.*;
import java.io.*;
import java.util.Properties;
public class Chat implements javax.jms.MessageListener {
private TopicSession pubSession;
private TopicSession subSession;
private TopicPublisher publisher;
private TopicConnection connection;
private String username;
/* Constructor. Establish JMS publisher and subscriber */
public Chat(String topicName, String username, String password)
throws Exception {
// Obtain a JNDI connection
Properties properties = new Properties();
properties.put("java.naming.factory.initial",
"org.jnp.interfaces.NamingContextFactory");
properties.put("java.naming.factory.url.pkgs",
"org.jboss.naming:org.jnp.interfaces");
properties.setProperty(Context.PROVIDER_URL, "localhost:1099");
// ... specify the JNDI properties specific to the vendor
InitialContext jndi = new InitialContext(properties);
// Look up a JMS connection factory
TopicConnectionFactory conFactory = (TopicConnectionFactory) jndi
.lookup("TopicConnectionFactory");
// Create a JMS connection
TopicConnection connection = conFactory.createTopicConnection();
// Create two JMS session objects
TopicSession pubSession = connection.createTopicSession(false,
Session.CLIENT_ACKNOWLEDGE);
TopicSession subSession = connection.createTopicSession(false,
Session.CLIENT_ACKNOWLEDGE);
// Look up a JMS topic
Topic chatTopic = (Topic) jndi.lookup(topicName);
// Create a JMS publisher and subscriber
TopicPublisher publisher = pubSession.createPublisher(chatTopic);
TopicSubscriber subscriber = subSession.createSubscriber(chatTopic);
// Set a JMS message listener
subscriber.setMessageListener(this);
// Intialize the Chat application
set(connection, pubSession, subSession, publisher, username);
// Start the JMS connection; allows messages to be delivered
connection.start();
}
/* Initialize the instance variables */
public void set(TopicConnection con, TopicSession pubSess,
TopicSession subSess, TopicPublisher pub, String username) {
this.connection = con;
this.pubSession = pubSess;
this.subSession = subSess;
this.publisher = pub;
this.username = username;
}
/* Receive message from topic subscriber */
public void onMessage(Message message) {
try {
TextMessage textMessage = (TextMessage) message;
String text = textMessage.getText();
System.out.println(text);
if(textMessage!=null){
throw new NullPointerException();
}
} catch (JMSException jmse) {
jmse.printStackTrace();
}
}
/* Create and send message using topic publisher */
protected void writeMessage(String text) throws JMSException {
TextMessage message = pubSession.createTextMessage();
message.setText(username + " : " + text);
publisher.publish(message);
}
/* Close the JMS connection */
public void close() throws JMSException {
connection.close();
}
/* Run the Chat client */
public static void main(String[] args) {
try {
if (args.length != 3)
System.out.println("Topic or username missing");
// args[0]=topicName; args[1]=username; args[2]=password
Chat chat = new Chat("topic/testTopic", "", "");
// Read from command line
BufferedReader commandLine = new java.io.BufferedReader(
new InputStreamReader(System.in));
// Loop until the word "exit" is typed
while (true) {
String s = commandLine.readLine();
if (s.equalsIgnoreCase("exit")) {
chat.close(); // close down connection
System.exit(0);// exit program
} else
chat.writeMessage(s);
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
在上面的代码中,我使用的是Client_Acknowledge
会话模式,但是即使我NullPointerException
从onMessage
Listener 的方法中抛出,我也没有收到消息的重新传递。
请让我知道重新交付是否需要任何配置更改。