Code EJB : Lesson - 10

Question

3.     SportsNewsBean
DistributeSportsNewsMDB.java
import javax.ejb.*;
import javax.jms.*;
public class DistributeSportsNewsMDB implements MessageDrivenBean,MessageListener
protected MessageDrivenContext ctx;
String text;
public void setMessageDrivenContext(MessageDrivenContext ctx)     {          this.ctx=ctx;     }
public void ejbCreate()     {     //     System.out.println("ejbcreate");     }
public void onMessage(Message msg)
     TextMessage tm=(TextMessage) msg;
     try
               text=tm.getText();
               System.out.println("TOPIC: SPORTS # GOING TO DISTRIBUTE :"+msg);
               insertMessageToDB(); //JavaMAIL should be used to send mail
     catch(JMSException e)
               e.printStackTrace();
public void ejbRemove()      {       //System.err.println("ejbremove");     }
void insertMessageToDB() //JavaMAIL should be used to send mail
try
     Class.forName("oracle.jdbc.driver.OracleDriver");
     java.sql.Connection con=java.sql.DriverManager.getConnection("jdbc:oracle:thin:@192.168.29.62:1521:ORCL","pravash","pravash");
     java.sql.PreparedStatement     stat=con.prepareStatement("Insert into TopicInfo values(?,?)");
     stat.setString(1,"SportsNews");
     stat.setString(2,text);
     stat.executeUpdate();
     stat.close();
     con.close();
catch(Exception e)
     e.printStackTrace();
ejb-jar.xml
<?xml version="1.0"?>
<!DOCTYPE ejb-jar>
<ejb-jar>
<enterprise-beans>
<message-driven>
<ejb-name>DistributeSportsNews</ejb-name>
<ejb-class>DistributeSportsNewsMDB</ejb-class>
<message-selector></message-selector>
<resource-env-ref-name>SportsTopic</resource-env-ref-name>
<resource-env-ref-type>javax.jms.Topic</resource-env-ref-type>
<resource-ref>
<res-ref-name>TopicConnectionFactory </res-ref-name>
<res-type>javax.jms.TopicConnectionFactory</res-type>
<res-auth>Container</res-auth>
</resource-ref>
<transaction-type>Container</transaction-type>
<message-driven-destination>
<destination-type>javax.jms.Topic</destination-type>
<subscription-durability>NonDurable</subscription-durability>
</message-driven-destination>
</message-driven>
</enterprise-beans>
<assembly-descriptor>
<container-transaction>
<method>
<ejb-name>DistributeSportsNews</ejb-name>
<method-name>*</method-name>
</method>
<trans-attribute>NotSupported</trans-attribute>
</container-transaction>
</assembly-descriptor>
</ejb-jar>
jboss.xml
<?xml version="1.0" encoding="UTF-8" ?>
<jboss>
<enterprise-beans>
<message-driven>
<ejb-name>DistributeSportsNews</ejb-name>
<configuration-name>Standard Message Driven Bean</configuration-name>
<destination-jndi-name>SportsTopic</destination-jndi-name>
</message-driven>
</enterprise-beans>
</jboss>
BUILD.BAT
@echo off
echo COMPILING THE MDBEAN
javac DistributeSportsNewsMDB.java
echo CREATING THE JAR FOR DEPLOYMENT
jar -cv0f DistributeSportsNewsMDB.jar META-INF DistributeSportsNewsMDB.class
echo DEPLOYING THE JAR FOR USE
copy DistributeSportsNewsMDB.jar c:\jbosstomcat\jboss\deploy
echo DEPLOYMENT PROCESS OVER ....

Answer 1

wtf ? what the hell is that ?:-) I wonder how he does it without the EJB QL. Not that I want him to post it.