Hi all,
I am new to jboss and want to use EJB tech. I was trying to
follow the 7 step tutorial (using the interest example) given and was
successful in deploying the EJB in jboss and also was successful in
running the client(InterestClient).
I'm currently
using Tomcat 3.2.1 with Jboss 2.1-beta
under JDK1.3.
But when I made a servlet to call my IntesestBean, the servlet in
Tomcat can not find IntesestHome, it trully
puzzled me.
This is the source code of the
Servlet EJB.java:
import
java.io.*;
// Servlet stuff
import javax.servlet.*;
import javax.servlet.http.*;
// EJB stuff
import javax.naming.*;
import java.util.Hashtable;
import javax.rmi.PortableRemoteObject;
import com.web_tomorrow.interest.*;public class EJB extends HttpServlet {
// Servlet stuff
import javax.servlet.*;
import javax.servlet.http.*;
// EJB stuff
import javax.naming.*;
import java.util.Hashtable;
import javax.rmi.PortableRemoteObject;
import com.web_tomorrow.interest.*;public class EJB extends HttpServlet {
private Interest
m_interest = null;
private String sHome="";
private String sHome="";
public void init()
{
try {
System.setProperty("java.naming.factory.initial",
"org.jnp.interfaces.NamingContextFactory");
System.setProperty("java.naming.provider.url",
"localhost:1099");
// Get a naming context
InitialContext jndiContext = new InitialContext();
sHome = "1";
try {
System.setProperty("java.naming.factory.initial",
"org.jnp.interfaces.NamingContextFactory");
System.setProperty("java.naming.provider.url",
"localhost:1099");
// Get a naming context
InitialContext jndiContext = new InitialContext();
sHome = "1";
// Get a reference to the Interest Bean
Object ref = jndiContext.lookup("InterestBean");
sHome = "2";
// Get a reference from this to the Bean's Home interface
InterestHome home = (InterestHome)
PortableRemoteObject.narrow (ref, InterestHome.class);
if (home == null) {sHome = "Home Null!";} else {sHome = "Not Null!";};
// Create an Interest object from the Home interface
m_interest = home.create();
} catch(Exception e) {
sHome = e.getMessage();
}
}
Object ref = jndiContext.lookup("InterestBean");
sHome = "2";
// Get a reference from this to the Bean's Home interface
InterestHome home = (InterestHome)
PortableRemoteObject.narrow (ref, InterestHome.class);
if (home == null) {sHome = "Home Null!";} else {sHome = "Not Null!";};
// Create an Interest object from the Home interface
m_interest = home.create();
} catch(Exception e) {
sHome = e.getMessage();
}
}
public void doGet
(HttpServletRequest
request,
HttpServletResponse response)
throws ServletException, IOException {
PrintWriter out;
String title = "Servlet interface to EJB";
// set content type and other response header fields first
response.setContentType("text/html");
// then write the data of the response
out = response.getWriter();
out.println("<HTML><HEAD><TITLE>");
out.println(title);
out.println("</TITLE></HEAD><BODY bgcolor=\"#FFFFFF\">");
out.println("<H1>" + title + "</H1>");
HttpServletResponse response)
throws ServletException, IOException {
PrintWriter out;
String title = "Servlet interface to EJB";
// set content type and other response header fields first
response.setContentType("text/html");
// then write the data of the response
out = response.getWriter();
out.println("<HTML><HEAD><TITLE>");
out.println(title);
out.println("</TITLE></HEAD><BODY bgcolor=\"#FFFFFF\">");
out.println("<H1>" + title + "</H1>");
out.println("<H2>Calling EJB...</H2>");
out.println("<H2>ok: " + sHome + "</H2>");
try {
if (m_interest == null) {
out.println ("Could not connect to Interest bean. Is EJB Container running?");
} else {
out.println("<H2>ok: " + sHome + "</H2>");
try {
if (m_interest == null) {
out.println ("Could not connect to Interest bean. Is EJB Container running?");
} else {
// call the
calculateCompoundInterest() method to do the
calculation
out.println ("Interest on 1000 units, at 10% per period, " +
"compounded over 2 periods is:");
out.println (m_interest.calculateCompoundInterest (1000, 0.10, 2));
}
} catch(Exception e) {
out.println(e.toString());
} finally {
out.println("</BODY></HTML>");
out.close();
}
}
}
out.println ("Interest on 1000 units, at 10% per period, " +
"compounded over 2 periods is:");
out.println (m_interest.calculateCompoundInterest (1000, 0.10, 2));
}
} catch(Exception e) {
out.println(e.toString());
} finally {
out.println("</BODY></HTML>");
out.close();
}
}
}
this is the result when I go to
http://localhost:8080/servlet/EJB:
Servlet interface to EJB
Calling EJB...
ok: 1
Could not connect to Interest bean. Is EJB Container running?help me!
thanks a
lot!
Sam Liu
Sam Liu
