Java Message Mechanism ActiveMQ entry instance, javaactivemq

Java Message Mechanism ActiveMQ entry instance, javaactivemq

1. Download ActiveMQ
Go to the official website download: http://activemq.apache.org/
I downloaded ActiveMQ 5.8.0 Release.

2. Run ActiveMQ
Uncompress apache-activemq-5.8.0-bin.zip, and double-click the apache-activemq-5.5.1 \ bin \ activemq. bat to run the ActiveMQ program.

After ActiveMQ is started, log on to: http: // localhost: 8161/admin/and create a Queue named FirstQueue.

3. Create and run an Eclipse project
Create java project: ActiveMQ-5.8, new lib folder
Open apache-activemq-5.8.0 \ lib directory
Copy
Activemq-broker-5.8.0.jar
Activemq-client-5.8.0.jar
Geronimo-j2ee-management_1.1_spec-1.0.1.jar
Geronimo-jms_1.1_spec-1.1.1.jar
Slf4j-api-1.6.6.jar
Add these five jar files to the lib folder and Build Path-> Add to Build Path

Structure:

 


Sender. java

Package com. lm. activemq;/*** @ Header: Sender. java * class description: * @ author: lm * @ date 10:52:42 * @ Email * @ company Huan * @ addr Jinsong, Chaoyang District, Beijing */import javax. jms. connection; import javax. jms. connectionFactory; import javax. jms. deliveryMode; import javax. jms. destination; import javax. jms. messageProducer; import javax. jms. session; import javax. jms. textMessage; import org. apache. activemq. activeMQConnection; impo Rt org. apache. activemq. activeMQConnectionFactory; public class Sender {private static final int SEND_NUMBER = 5; public static void main (String [] args) {// ConnectionFactory: Connection factory, which is used by JMS to create ConnectionFactory connectionFactory; // Connection: Connection connection Connection from the JMS client to the JMS // Provider = null; // Session: the Session session of a thread that sends or receives messages; // Destination: the Message Destination; to whom the message is sent. destination destination; // Messa GeProducer: message sender MessageProducer producer; // TextMessage message; // construct the ConnectionFactory instance object. The implementation of ActiveMq jarconnectionFactory = new ActiveMQConnectionFactory (ActiveMQConnection. DEFAULT_USER, ActiveMQConnection. DEFAULT_PASSWORD, "tcp: // localhost: 61616"); try {// construct the connection object connection = connectionFactory from the factory. createConnection (); // start connection. start (); // get the operation connection session = connection. createSession (Boolean. TRUE, Session. AUTO_ACKNOWLEDGE); // obtains the xingbo parameter value of the session. xu-queue is a server's queue. You must configure destination = session on the ActiveMq console. createQueue ("FirstQueue"); // producer = session. createProducer (destination); // The setting is not persistent. Learn here and decide the producer according to the project. setDeliveryMode (DeliveryMode. NON_PERSISTENT); // construct a message. The message is written to an end here. The project is a parameter, or the method used to obtain sendMessage (session, producer); session. commit ();} catch (Exception e) {e. printStackTrace () ;} Finally {try {if (null! = Connection) connection. close () ;}catch (Throwable ignore) {}} public static void sendMessage (Session session, MessageProducer producer) throws Exception {for (int I = 1; I <= SEND_NUMBER; I ++) {TextMessage message = session. createTextMessage ("message sent by ActiveMq" + I); // send the message to the destination System. out. println ("Send message:" + "message sent by ActiveMq" + I); producer. send (message );}}}

　　

 

Receiver. java

 

Package com. lm. activemq;/*** @ Header: Receiver. java * class description: * @ author: lm * @ date 10:52:58 * @ Email * @ company Huan * @ addr Jinsong, Chaoyang District, Beijing */import javax. jms. connection; import javax. jms. connectionFactory; import javax. jms. destination; import javax. jms. messageConsumer; import javax. jms. session; import javax. jms. textMessage; import org. apache. activemq. activeMQConnection; import org. apache. activemq. activ EMQConnectionFactory; public class Receiver {public static void main (String [] args) {// ConnectionFactory: Connection factory, and JMS uses it to create a Connection ConnectionFactory connectionFactory; // Connection: connection connection from the JMS client to the JMS Provider = null; // Session: the Session session of the thread that sends or receives the message; // Destination: the Message Destination; to which the message is sent. destination destination; // consumer, Message Receiver MessageConsumer consumer; connectionFactory = new ActiveMQConnectionFa Ctory (ActiveMQConnection. DEFAULT_USER, ActiveMQConnection. DEFAULT_PASSWORD, "tcp: // localhost: 61616"); try {// construct the connection object connection = connectionFactory from the factory. createConnection (); // start connection. start (); // get the operation connection session = connection. createSession (Boolean. FALSE, Session. AUTO_ACKNOWLEDGE); // obtains the xingbo parameter value of the session. xu-queue is a server's queue. You must configure destination = session on the ActiveMq console. createQueue ("FirstQueue"); consumer = Session. createConsumer (destination); while (true) {// set the time for the receiver to receive the message. To facilitate the test, who set this parameter to 100 sTextMessage message = (TextMessage) consumer. receive (100000); if (null! = Message) {System. out. println ("Receive message" + message. getText () ;}else {break ;}} catch (Exception e) {e. printStackTrace ();} finally {try {if (null! = Connection) connection. close () ;}catch (Throwable ignore ){}}}}

　　

 

5. Test process
Run: Er er. java
Run Sender. java again.

The result is displayed.
After Sender is run:
Send message: Message 1 sent by ActiveMq
Send message: Message sent by ActiveMq 2
Send message: Message sent by ActiveMq 3
Send message: Message sent by ActiveMq 4
Send message: Message sent by ActiveMq 5

After the worker is running:
Receive message 1 sent by ActiveMq
Receive the message sent by ActiveMq 2
3. receive the message sent by ActiveMq
Receive the message sent by ActiveMq 4
Receive the message sent by ActiveMq 5

To view different output content, click the button as shown in.

 


In Receiver. java, you can set a time, such as receive (500000), as shown in the following code:

Java code

1. TextMessage message = (TextMessage) consumer. receive (500000 );

If you run ER er. java at this time, it will keep the worker er. java running for 500 seconds. In eclipse, you can find that:




Click the Red Square to manually stop running the program.