I need a single example| JBoss.org Content Archive (Read Only)

1. Re: I need a single example

jasonbrome Aug 19, 2002 5:35 PM (in response to sheldon)

Have you read through the JBoss 3.0 quickstart docs yet?

http://www.jboss.org/docs/#free-30x

If you have, what particular problems were you having?

2. Re: I need a single example

torreblanca Aug 20, 2002 3:13 PM (in response to sheldon)

Sheldon,
Here is the procedure for JSPs :

1. Write the JSP
Example (uno.jsp) :

<%@ page import="java.text.*,
java.util.*"%>

<%
Date d = new Date();
String hoy = DateFormat.getDateInstance().format(d);
%>
La Fecha de hoy es :
<%= hoy %>

2. Create a WAR file with JSP file. Use the following command :

jar -cvfM uno.war uno.jsp

3. Create an application.xml file in META-INF directory. You need set the correct values in <web-uri> tag and <context-root> tag.

web-uri = WAR name file

Example (application.xml):

<?xml version="1.0" encoding="ISO-8859-1"?>

<display-name>uno</display-name>

<web-uri>uno.war</web-uri>
<context-root>/uno</context-root>

4. Create a EAR file with WAR file and application.xml file. Use the following command :

jar -cvfM uno.ear uno.war META-INF

5. Copy this EAR file in %JBOSS_HOME%\server\default\deploy

6. Run the JBoss-Tomcat server.

7. Test the JSP. Use the following URL:

http://[IP ADDRESS SERVER]:8080/uno/uno.jsp

The first time is slow because JBoss-Tomcat compiles the JSP file but the next time is fast.

HERE IS THE PROCEDURE FOR SERVLETS :

1. Write your servlet. For example

Dos.java

package com.servlet;

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class Dos extends HttpServlet {
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {

PrintWriter out = response.getWriter();
out.println("Hello World");
}
}

2. Compile your servlet. Use the following command :

javac -classpath d:\jboss-3.0.1_Tomcat-4.0.4\catalina\common\lib\servlet.jar Dos.java

3. Create a WEB-INF directory.

4. Create a classes directory in WEB-INF directory and copy Dos.class.

WEB-INF (Subdirectory)
I
I
classes (Subdirectory) ---
I
I
com (subdirectory)----
I
I
servlet (subdirectory)
I
I
Dos.class (Java Class)

5. Create a web.xml file in WEB-INF directory.

For example:

<?xml version="1.0" encoding="ISO-8859-1"?>

<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>

<servlet-name>Dos</servlet-name>
<servlet-class>com.servlet.Dos</servlet-class>

</web-app>

6. Create a META-INF directory.

7. Create an application.xml file in META-INF directory.

For example:

application.xml

<?xml version="1.0" encoding="ISO-8859-1"?>

<display-name>dos</display-name>

<web-uri>dos.war</web-uri>
<context-root>/dos</context-root>

8. Create a WAR file. Use the following command :

jar -cvfM dos.war WEB-INF

9. Create a EAR file. Use the following command :

jar -cvfM dos.ear dos.war META-INF

10. Copy the EAR file in %JBOSS_HOME%\server\default\deploy

11. Run the JBoss-Tomcat server.

12. Test the Servlet. Use the following URL:

http://[IP ADDRESS SERVER]:8080/dos/servlet/Dos

Regards

Javier

3. Re: I need a single example

torreblanca Aug 20, 2002 3:15 PM (in response to sheldon)

Sheldon
I send you in attachment the following files :

uno.ear (JSP example)
dos.ear (Servlet example)

Test it.

Regards

Javier

4. Re: I need a single example

skydive Aug 22, 2002 10:44 AM (in response to sheldon)

Thank you very much, it worked perfectly.

5. Re: I need a single example

bakul Aug 23, 2002 3:23 PM (in response to sheldon)

Is there any example which shows how to write and deploy Session and Entity Beans, Clients, configure Datasources etc. for JBoss3. I couldn't find any examples shipped with the server and the Getting started docs doesn't contain nay information on EJBs. Those chapters are empty.

I have my own EJB jar files but I need to know what extra to do deploy my jar files on JBoss, what files I need to put where and what to put in the classpath.

Thanks
Bakul

6. Re: I need a single example

tomyang Aug 25, 2002 1:40 AM (in response to sheldon)

Hi all:
I followd Torreblanca's instruction exactly (actually, I copied and pasted his example for the jsp page uno.jsp), but when I load the page from the Web browser, I got the error message:

type Status report

message No Context configured to process this request

description The server encountered an internal error (No Context configured to process this request) that prevented it from fulfilling this request.

Can someone please help me to figure out what is wrong? Thank you very much in advance!

Tom

7. Re: I need a single example

tomyang Aug 25, 2002 4:49 PM (in response to sheldon)

Hi all:
I got the answer to my question. I forgot to include the servlet.jar in my CLASSPATH. Thanks all the for help in the posting.

Tom

8. Re: I need a single example

torreblanca Aug 28, 2002 2:39 PM (in response to sheldon)

Bakul,
I followed the "Mastering Enterprise JavaBeans" (Ed Roman) book examples. The examples are working in JBoss-3.0.1_Tomcat-4.0.4. I only changed the xml configuration files. The EAR, WAR and JAR structure file is very important to deploy applications.
You can get free this e-book at :
http://www.theserverside.com/books/masteringEJB/index.jsp

In this reply I explain a Session Stateless Session bean and in other replies I will send you examples of Stateful Session bean, Bean-Managed Persistent Entity Bean, Container-Managed Persistent Entity Bean and Message-driven bean.
I need to prepare every document, let me a little time.
________________________________________

Stateless Session Bean

This Stateless Session bean example shows the date.

1. Create the following files : PrimerEJB.java, PrimerHome.java and Primer.java at

[drive]:\examples\src

Source of PrimerEJB.java
__________________________________________________
package com.ejb1;

import javax.ejb.SessionBean;
import javax.ejb.EJBException;
import javax.ejb.SessionContext;
import java.rmi.RemoteException;
import java.util.Date;

public class PrimerEJB implements SessionBean {
public String recuperaTiempo() {
return "La fecha es : " + new Date().toString();
}

public void ejbCreate() {}
public void ejbPassivate() {}
public void ejbActivate() {}
public void ejbRemove() {}
public void setSessionContext(SessionContext context) {}
}
_________________________________________________

The recuperaTiempo method retrieves the date.

Source of PrimerHome.java
________________________________________________
package com.ejb1;

import javax.ejb.EJBHome;
import javax.ejb.CreateException;
import java.rmi.RemoteException;
import com.ejb1.Primer;

public interface PrimerHome extends EJBHome {
public Primer create() throws CreateException, RemoteException;
}
________________________________________________

Source of Primer.java
________________________________________________
package com.ejb1;
import javax.ejb.EJBObject;
import java.rmi.RemoteException;

public interface Primer extends EJBObject {
public String recuperaTiempo() throws RemoteException;
}
________________________________________________

2. Compile PrimerEJB.java, PrimerHome.java and Primer.java in [drive]:\examples\src.

javac -d d:\examples\src -classpath %classpath%;.;d:\examples\src;d:\jboss-3.0.1_Tomcat-4.0.4\client\jboss-j2ee.jar *.java

3. The before step creates the following directory structure:

[drive]:\examples\src\com\ejb1\PrimerEJB.class
[drive]:\examples\src\com\ejb1\PrimerHome.class
[drive]:\examples\src\com\ejb1\Primer.class

4. Create the jsp (primerEJB.jsp)

Source of primerEJB.jsp
____________________________________________________________
<%@ page import="javax.naming.InitialContext,
javax.naming.Context,
java.util.Properties,
com.ejb1.Primer,
com.ejb1.PrimerHome"%>
<%
long t1 = System.currentTimeMillis();
Properties props = new Properties();
props.put(Context.INITIAL_CONTEXT_FACTORY,
"org.jnp.interfaces.NamingContextFactory");
props.put(Context.PROVIDER_URL, "13.134.79.127:1099");

Context ctx = new InitialContext(props);
PrimerHome home = (PrimerHome)ctx.lookup("ejb/Primer");
Primer bean = home.create();
String time = bean.recuperaTiempo();
bean.remove();
ctx.close();
long t2 = System.currentTimeMillis();
%>

p { font-family:Verdana;font-size:12px; }

Mensaje recibido del bean = "<%= time %>".Tiempo transcurrido :
<%= (t2 - t1) %> ms.

_________________________________________________________

You need to change the following line:

props.put(Context.PROVIDER_URL, "13.134.79.127:1099");

change to your IP ADDRESS JBOSS_TOMCAT SERVER :

props.put(Context.PROVIDER_URL, "[IP ADDRESS SERVER]:1099");

5. Create ejb-jar.xml in [drive]:\examples\src\META-INF

Source of ejb-jar.xml
_______________________________________________________
<?xml version="1.0"?>
<!DOCTYPE ejb-jar PUBLIC "-//Sun Microsystems,
Inc.//DTD Enterprise JavaBeans 2.0//EN"
"http://java.sun.com/dtd/ejb-jar_2_0.dtd">
<ejb-jar>

<enterprise-beans>

<display-name>PrimerEJB</display-name>
<ejb-name>Primer</ejb-name>
com.ejb1.PrimerHome
com.ejb1.Primer
<ejb-class>com.ejb1.PrimerEJB</ejb-class>
<session-type>Stateless</session-type>
<transaction-type>Bean</transaction-type>

</enterprise-beans>
</ejb-jar>
________________________________________________________

6. Create jboss.xml in [drive]:\examples\src\META-INF

Source of jboss.xml
_______________________________________________________
<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE jboss PUBLIC "-//JBoss//DTD JBOSS//EN"
"http://www.jboss.org/j2ee/dtd/jboss.dtd">

<enterprise-beans>

<ejb-name>Primer</ejb-name>
<jndi-name>ejb/Primer</jndi-name>

</enterprise-beans>

_______________________________________________________

The value in <jndi-name> tag is equal to the following line used in primerEJB.jsp :

PrimerHome home = (PrimerHome)ctx.lookup("ejb/Primer");

7. Create [drive]:\examples\src\WEB-INF\classes and then copy the EJB classes with their package structure (PrimerEJB.class, PrimerHome.class and Primer.class).

the result is :

[drive]:\examples\src\WEB-INF\classes\com\ejb1\PrimerEJB.class
[drive]:\examples\src\WEB-INF\classes\com\ejb1\PrimerHome.class
[drive]:\examples\src\WEB-INF\classes\com\ejb1\Primer.class

8. Create the JAR file (primerEJB.jar). Change to [drive]:\examples\src directory and use the following instruction :

jar -cvfM primerEJB.jar com META-INF

9. Create the WAR file (primerEJB.war). Change to [drive]:\examples\src directory and use the following instruction :

jar -cvfM primerEJB.war WEB-INF primerEJB.jsp

10. Copy the JAR file (primerEJB.jar) and WAR file (primerEJB.war) to [drive]:\examples

11. Create application.xml in [drive]:\examples\META-INF directory.

Source of application.xml
__________________________________________________________
<?xml version="1.0" encoding="ISO-8859-1"?>

<display-name>Primer EJB</display-name>

<web-uri>primerEJB.war</web-uri>
<context-root>/primerEJB</context-root>

primerEJB.jar

__________________________________________________________

The value in <web-uri> tag is the name of your WAR file.
The value in <context-root> tag is the context of your application.
The value in tag is the name of your JAR file.

12. Create the EAR file (primerEJB.ear). Change to [drive]:\examples directory and use the following instruction :

jar -cvfM primerEJB.ear primerEJB.jar primerEJB.war META-INF

13. Copy the EAR file to %JBOSS_HOME%\server\default\deploy.

14. Run JBoss-Tomcat Server

14. Test the application :

http://[IP ADDRESS JBOSS-TOMCAT SERVER]:8080/primerEJB/primerEJB.jsp

You can automate this building process using Ant.

In the next reply I will send you in attachment the EAR file (primerEJB.ear)

Regards

Javier

JBossDeveloper

I need a single example