mq5.0-source.src.share.java.examples.jms20.sharedsub.ProducerExample Maven / Gradle / Ivy
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import java.util.*;
import javax.jms.*;
/**
* The ProducerExample class publishes messages to the shared
* consumers.
*
* Run this program in conjunction with SharedNonDuraConsumer.
* Specify a topic name on the command line when you run
* the program. By default, the program sends one message. Specify a number
* after the topic name to send that number of messages.
*/
public class ProducerExample {
static int exitcode = 0;
private String destName = null;
private int noOfMsgs;
final String MSG_TEXT = new String("Message");
/**
* Main method.
*
* @param args the topic used by the example and, optionally, the
* number of messages to send
*/
public static void main(String args[]) {
if ( (args.length < 1) || (args.length > 2) ) {
System.out.println("Usage: java ProducerExample []");
System.exit(1);
}
ProducerExample sendMsg = new ProducerExample();
sendMsg.parseArgs(args);
try {
// Send messages to topic
sendMsg.sendmsgs();
}catch(JMSException ex) {
ex.printStackTrace();
exitcode = 1;
}
System.exit(exitcode);
}
/**
* parseArgs method.
*
* @param args the arguments that are passed through main method
*/
public void parseArgs(String[] args){
destName = new String(args[0]);
System.out.println("Topic name is " + destName);
if (args.length == 2){
noOfMsgs = (new Integer(args[1])).intValue();
} else {
noOfMsgs = 1;
}
}
/**
* Send messages to the topic destination
*
* @param none
* @throws JMSException
*/
public void sendmsgs() throws JMSException {
ConnectionFactory cf = new com.sun.messaging.ConnectionFactory();
// JMSContext will be closed automatically with the try-with-resources block
try (JMSContext jmsContext = cf.createContext(JMSContext.AUTO_ACKNOWLEDGE);) {
System.out.println("Created jms context successfully");
// Create topic
Topic topic = jmsContext.createTopic(destName);
System.out.println("Created topic successfully");
/*
* Create producer.
* Create text message.
* Send messages, varying text slightly.
*/
for (int i = 0; i < noOfMsgs; i++) {
String data = MSG_TEXT + " " + (i + 1);
jmsContext.createProducer().send(topic,data);
System.out.println("Message sent : " + data);
}
}
}
}