bai 12- message driven bean - entity beans

7/31/2019 Bai 12- Message Driven Bean - Entity Beans

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Series: EJB 2.x vi Netbeans

By V Vn Hihttp://vovanhai.wordpress.com

Thm 1 CMP nh sau: Nhn phi chut ln project c hn New->Others, chn nh hnh

To datasource v chn bng nh sau:


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G package name vi tn: vovanhai.wordpress.com.entities

Chnh sa file LophocLocalHome.java nh sau:

package vovanhai.wordpress.com.entities;

import java.util.Collection;import javax.ejb.CreateException;import javax.ejb.EJBLocalHome;import javax.ejb.FinderException;

/**** @author VoVanHai*/

public interface LophocLocalHome extends EJBLocalHome {

vovanhai.wordpress.com.entities.LophocLocal findByPrimaryKey(java.lang.String key) throwsFinderException;


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vovanhai.wordpress.com.entities.LophocLocal create(String msLop, String tenLop, StringgiaovienCN) throws CreateException;

Collection findByMsLop(String msLop) throws FinderException;

Collection findByTenLop(String tenLop) throws FinderException;

Collection findByGiaovienCN(String giaovienCN) throws FinderException;

Collection findAll() throws FinderException;}

Sa file LophocBean.java nh sau:

public java.lang.String ejbCreate(String msLop, String tenLop, String giaovienCN) throwsCreateException {

if (msLop == null) {throw new CreateException("The field \"key\" must not be null");

}setMsLop(msLop);setTenLop(tenLop);setGiaovienCN(giaovienCN);return null;

}

public void ejbPostCreate(String msLop, String tenLop, String giaovienCN) {}

M file ejb-jar.xmlln, thm 1 nh sau

findAll

SELECT OBJECT(l) FROM Lophoc AS l

Trong jboss.xml, thm phn on khai bo cho entity bean nh sau :

LophocBeanLophocBean


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Thm 1 Message-Driven Bean cho vic lng nghe cc Message gi n v slu thng tin xungCSDL dng Entity bean.

Nhn phi chut ln Project, chn New->Others, chn MDN nh hnh

t tn MDB l LophocMessage, gi l vovanhai.wordpress.com.mdb.

Code cho phng thc onMessage

public void onMessage(Message aMessage) {try {

//y gi thuyt chng ta chly MapMessage


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if (aMessage instanceof MapMessage) {MapMessage msg = (MapMessage) aMessage;

Context ctx = new InitialContext();LophocLocalHome home = (LophocLocalHome) ctx.lookup("LophocBean");String msLop = msg.getString("msLop");String tenLop = msg.getString("tenLop");

String gvcn = msg.getString("gvcn");LophocLocal lophoc = home.create(msLop, tenLop, gvcn);System.out.println("__________Insert class \"" + tenLop + "\" successful.");

}} catch (Exception e) {

e.printStackTrace();}

}

Cu trc Project

Ni dung ejb-jar.xml

jdbc:sqlserver://localhost:1433;databaseName=StudentMS [sa on

dbo]LophocEBLophocBeanvovanhai.wordpress.com.entities.LophocLocalHomevovanhai.wordpress.com.entities.LophocLocalvovanhai.wordpress.com.entities.LophocBeanContainerjava.lang.Stringfalse

Lophoc

msLop


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LophocBean*Required

LophocMessageBean*

Required

Destination for LophocMessageMDBSampleServerQueue

Ni dung file jboss.xml

LophocBeanLophocBean

LophocMessageBeanqueue/SampleServerQueue

Ni dung file jbosscmp-jdbc.xml

java:/Students_DSNMS SQLSERVERfalsefalse


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LophocBeanjava:/Students_DSNMS SQLSERVERfalse

LophocmsLopmsLop

tenLoptenLop

giaovienCNgiaovienCN

Trin khai


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Client

To 1 Web Application c tn EJB21_MDB_Entity_client


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Thm 1 servlet c tn QueueClientServlet trong gi vovanhai.wordpress.com.vn nh sau:

Code cho phn xl

protected void processRequest(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {

response.setContentType("text/html;charset=UTF-8");PrintWriter out = response.getWriter();try {

System.setProperty("java.naming.factory.initial","org.jnp.interfaces.NamingContextFactory");

System.setProperty("java.naming.provider.url", "127.0.0.1:1099");Context context = new InitialContext();QueueConnectionFactory connectionFactory = (QueueConnectionFactory)

context.lookup("ConnectionFactory");QueueConnection queueConnection = connectionFactory.createQueueConnection();QueueSession queueSession = queueConnection.createQueueSession(false,

Session.AUTO_ACKNOWLEDGE);Queue queue = (Queue) context.lookup("queue/TyteoDest");QueueSender queueSender = queueSession.createSender(queue);


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MapMessage message = queueSession.createMapMessage();message.setString("msLop", "DHTH1A");message.setString("tenLop", "Lp i hc tin hc 1A");message.setString("gvcn", "V Vn Hi");

queueSender.send(message);queueConnection.close();

out.println("
Queue send successful!...");} catch (Exception ex) {out.println(ex.getMessage());

} finally {out.close();

}}

Kt qutrn Jboss console:

Database :

bai 12- message driven bean - entity beans

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