Alternatively, you could use the free and server-independent taglibs
from Orion. Here's some example code which makes a session bean
available in a JSP, creating it if necessary:
<%@ taglib uri="ejbtags" prefix="ejb" %>
<ejb:useBean id="memberSession"
type="com.similarity.ejb.membersession.MemberSession"
scope="session">
<ejb:useHome id="sessHome"
type="com.similarity.ejb.membersession.MemberSessionHome"
location="java:comp/env/ejb/MemberSession" />
<ejb:createBean instance="<%= sessHome.create() %>" />
</ejb:useBean>
There are quite a few other nifty features included as well. Go to
http://www.orionserver.com and follow the link "... the Orion taglibs"
at the bottom-right corner of the page. You might also want to read the
excellent tutorial on writing taglibs.
Jeff Schnitzer
[EMAIL PROTECTED]
>-----Original Message-----
>From: Pavan Venkata Tirunagari [mailto:[EMAIL PROTECTED]]
>Sent: Tuesday, January 23, 2001 7:03 AM
>To: [EMAIL PROTECTED]
>Subject: Re: EJB from JSP
>
>
>The following is a code snippet that demonstrates how a JSP page can
>interact with an EJB session bean:
><%@ page import="javax.naming.*, javax.rmi.PortableRemoteObject,
>foo.AccountHome, foo.Account" %>
><%!
> //declare a "global" reference to an instance of the home
>interface of the
>session bean
> AccountHome accHome=null;
>
> public void jspInit() {
> //obtain an instance of the home interface
> InitialContext cntxt = new InitialContext( );
> Object ref= cntxt.lookup("java:comp/env/ejb/AccountEJB");
> accHome =
>(AccountHome)PortableRemoteObject.narrow(ref,AccountHome.class);
> }
>%>
><%
> //instantiate the session bean
> Account acct = accHome.create();
> //invoke the remote methods
> acct.doWhatever(...);
> // etc etc...
>%>
>
>
>What is the most efficient approach for integrating EJB with
>JSP? Should the
>EJBs be invoked directly from within JSP scriptlets? Should
>the access take
>place from within Java beans? Or is it best to use custom tags for this
>purpose?
>
>1) JSP scriptlet code should be minimal. Invoking EJB code
>directly on a JSP
>page results in many lines of code on your JSP page, including
>try...catch
>blocks to catch naming and finding exceptions.
>
>2) Using a standard JavaBean as an intermediary between the
>JSP page and EJB
>server cuts down on the amount of code needed to add to a JSP page, and
>promotes reuse. The JavaBean should be a simple wrapper around
>the EJB you
>are accessing.
>If you use a standard JavaBean you could also use the
>jsp:useBean tag to
>setup EJB parameters, such as the server URL and server
>security parameters.
>
>3)Custom tags are also an option. However, they require a lot
>more coding
>than a simple JavaBean wrapper. The point should be to rewrite
>as little
>code as possible while at the same time keeping the JSP
>scriptlet content as
>light as possible
>
>
>----- Original Message -----
>From: "EJB Vikas" <[EMAIL PROTECTED]>
>To: <[EMAIL PROTECTED]>
>Sent: Sunday, January 14, 2001 10:51 PM
>Subject: EJB from JSP
>
>
>> Hi!
>>
>> I am using Weblogic to run my JSP, I want to access the EJB
>deployed in
>> weblogic from my JSP. How can I do that???
>> Any Links!!!!
>> Any codes!!!!!
>> TIA
>> Bye!
>>
>> _________________________________________________________________
>> Get your FREE download of MSN Explorer at http://explorer.msn.com
>>
>>
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>> [EMAIL PROTECTED] and include in the body of the message "help".
>>
>>
>
>===============================================================
>============
>To unsubscribe, send email to [EMAIL PROTECTED] and
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>[EMAIL PROTECTED] and include in the body of the message "help".
>
>
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