Activemq entry instance

ArticleDirectory

• 3.1.sender.java
• 3.2.receiver.java

1. Download activemq

Go to the official website download: http://activemq.apache.org/

2. Run activemq

Uncompress apache-activemq-5.5.1-bin.zip, and double-click the apache-activemq-5.5.1 \ bin \ activemq. BAT to run activemqProgram.

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 a project: ActiveMQ-5.5 and import the jar files to be used under the apache-activemq-5.5.1 \ lib directory, as shown in the project structure:

3.1.sender.java

 Package Com. xuwei. activemq;

 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;
 Import 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 a connection  
 Connectionfactory;
 // Connection: the connection from the JMS client to the JMS provider  
 Connection connection = Null ;
 //  Session: a thread that sends or receives messages.  
 Session session;
 //  Destination: the destination of the message.  
 Destination destination;
 //  Messageproducer: message sender  
 Messageproducer producer;
 //  Textmessage message;
  //  Construct the connectionfactory instance object. The activemq implementation jar is used here.  
 Connectionfactory = New Activemqconnectionfactory (
Activemqconnection. default_user,
Activemqconnection. default_password,
"TCP: // localhost: 61616 ");
 Try {
 //  Construct a connection object from the factory 
 Connection = connectionfactory. createconnection ();
 //  Start  
 Connection. Start ();
 //  Get operation connection  
 Session = connection. createsession (Boolean. True,
Session. auto_acknowledge );
 //  Obtain the session parameter value. xingbo. Xu-queue is a server's queue and must be configured on the activemq console.  
 Destination = session. createqueue ("firstqueue ");
 //  Message generator [Sender]  
 Producer = session. createproducer (destination );
 //  The settings are not persistent. Learn here and decide based on the project.  
 Producer. setdeliverymode (deliverymode. non_persistent );
 //  Construct a message. The message is written to an end. The project is a parameter or a method to obtain the message.  
 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, messageproducer producer)
 Throws Exception {
 For ( Int I = 1; I <= send_number; I ++ ){
Textmessage message = session
. Createtextmessage ("messages sent by activemq" + I );
 //  Send a message to the destination  
 System. Out. println ("Send message:" + "activemq sent message" + I );
Producer. Send (Message );
}
}
}

3.2.receiver.java

 Package Com. xuwei. activemq;

 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. activemqconnectionfactory;

 Public   Class Explorer {
 Public   Static   Void Main (string [] ARGs ){
 //  Connectionfactory: Connection factory, which is used by JMS to create a connection  
 Connectionfactory;
 // Connection: the connection from the JMS client to the JMS provider  
 Connection connection = Null ;
 //  Session: a thread that sends or receives messages.  
 Session session;
 //  Destination: the destination of the message.  
 Destination destination;
 //  Consumer, message recipient  
 Messageconsumer consumer;
Connectionfactory = New Activemqconnectionfactory (
Activemqconnection. default_user,
Activemqconnection. default_password,
"TCP: // localhost: 61616 ");
 Try {
 //  Construct a connection object from the factory  
 Connection = connectionfactory. createconnection ();
 //  Start  
 Connection. Start ();
//  Get operation connection  
 Session = connection. createsession (Boolean. False,
Session. auto_acknowledge );
 //  Obtain the session parameter value. xingbo. Xu-queue is a server's queue and must be configured on the activemq console.  
 Destination = session. createqueue ("firstqueue ");
Consumer = session. createconsumer (destination );
 While ( True ){
 // Set the time for the receiver to receive the message. To facilitate the test, who is set to 100 s?  
 Textmessage 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 ){
}
}
}
}

4. Notes

1. Finally, the receiver and the sender are tested on different machines.
2. The jar referenced by the project is finally found in lib under activemq, so that no version conflict occurs.

5. Test process

Because it is tested on a single machine, you need to enable two eclipse, each of which has its own workspace. We run the handler in eclipse1 and the sender in eclipse2.

The console interface does not have any information after the supervisor is run in eclipse1. After the sender is run in eclipse2, the console in eclipse2 displays the following information:

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

Return to eclipse1 and find the following information on the console interface:

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

PS: 2012-2-27

Today, we found that you do not need to enable two eclipse for testing. You can start multiple programs and have multiple consoles on the next page of Eclipse. in Java, set a large time, such as receive (500000), as follows:CodeAs shown in:

 
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.

After running the worker er, we are running the sender. After running the sender, we need to switch to the worker er console, as shown in: