我有这个发送者类,它正在向myQueue发送消息。
Sender.java
import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.jms.TextMessage;
import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.commons.collections.Factory;
public class Sender {
private ConnectionFactory factory = null;
private Connection connection = null;
private Session session = null;
private Destination destination = null;
private MessageProducer producer = null;
String [] messages = new String[] {"Hello ...My name is vaniiiiiiiiiii tanejaaaaaaaaaaaaaa",
"Hello ...My name is priyanka tanejaaaaaaaaaaaaaa",
"Hello ...My name is rahul tanejaaaaaaaaaaaaaa",
"Hello ...My name is popo tanejaaaaaaaaaaaaaa"};
public void sendMessage(){
factory = new ActiveMQConnectionFactory(
"tcp://localhost:61619");
try {
connection= factory.createConnection();
connection.start();
session= connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
destination=session.createQueue("Parul");
producer = session.createProducer(destination);
TextMessage message = session.createTextMessage();
for(int i=0;i<messages.length;i++){
message.setText(messages[i]);
System.out.println("Sent: " + message.getText());
producer.send(message);
}
} catch (JMSException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static void main(String[] args) {
Sender sender = new Sender();
sender.sendMessage();
}
}
我的消息现已发布到activemq,现在我们要读取来自activemq的消息。所以我写了消费类。
Consumer.java
import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageListener;
import javax.jms.Session;
import javax.jms.TextMessage;
import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.camel.Main;
public class Reciever implements MessageListener{
private ConnectionFactory factory;
private Connection connection;
private Session session;
private Destination destination;
private MessageConsumer consumer = null;
Reciever(){
}
void recieveMessage(){
factory= new ActiveMQConnectionFactory("tcp://localhost:61619");
try {
connection=factory.createConnection();
connection.start();
session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
System.out.println("session started");
destination=session.createQueue("Parul");
consumer = session.createConsumer(destination);
System.out.println("Consumer created");
while (true) {
System.out.println("About to read");
Message msg = consumer.receive(5000);
if (msg instanceof TextMessage) {
TextMessage tm = (TextMessage) msg;
System.out.println(tm.getText());
}
else{
System.out.println("Queue Empty");
connection.stop();
break;
}
}
} catch (JMSException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static void main(String[] args) {
Reciever reciever = new Reciever();
reciever.recieveMessage();
}
}
但我的消费者无法从队列中读取消息。问题是什么你能帮我解决这个问题。我想同时阅读所有4个消息。