How To Use EJB in JSP

I've used beans in JSP.. but how to use EJB's in beans ??
EJB's are deployed in Oracle 8i
Please Help
Thank You.

Please find the answer in this HOWTO:
http://technet.oracle.com:89/ubb/Forum2/HTML/006404.html
HOWTO's are archived on the JDeveloper Documentation page:
http://technet.oracle.com/docs/products/jdev/listing.htm (Click on Documentation Tab)
Thanks,
-Roel.

Similar Messages

How to use EJB in JSP...urgent!!!

hello,
i am novice programmer in EJB.
i am using weblogic 6.1 ...
my problem is how to use EJB in jsp page.
my code is as follow..but its not displaying any result.
<%@ page import="javax.naming.InitialContext,
javax.naming.Context,
java.util.Properties,
firstEJB.First,
firstEJB.FirstHome"%>
<%
     long t1 = System.currentTimeMillis();
     System.out.println(t1);
     Properties props = new Properties();
     p.put(Context.INITIAL_CONTEXT_FACTORY,"weblogic.jndi.TengahInitialContextFactory");
     props.put(Context.PROVIDER_URL, "localhost:7001");
     Context ctx = new InitialContext(props);
     FirstHome home = (FirstHome)ctx.lookup("FirstEJB");
     First bean = home.create();
     String time = bean.getTime();
     bean.remove();
     ctx.close();
     long t2 = System.currentTimeMillis();
%>
<html>
     <head>
          <style>p { font-family:Verdana;font-size:12px; }</style>
     </head>
     <body>
          <p>Message received from bean = "<%= time %>".<br>Time taken :
          <%= (t2 - t1) %> ms.</p>
     </body>
</html>
please tell me the solution.

Hi, I don't know if it may be the cuase of your problems, but you should narrow the Object obtained doing the lookup, like this:
FirstHome home = (FirstHome) PortableRemoteObject.narrow(ctx.lookup("FirstEJB"), FirstHome.class);

Newbie-how to use EJB in JSP?

Can some one please point me to any sources, tutorials, examples on using
          enterprise javabeans in JSP?
          How can I use an entity bean home interface or findByprimaryKey methods in
          JSP?
          Thanks in advance.


look at /examples/jsp/EJBeanManagedClient.jsp in your WLS distribution.
          Kumar
          Manmari wrote:
          > Can some one please point me to any sources, tutorials, examples on using
          > enterprise javabeans in JSP?
          > How can I use an entity bean home interface or findByprimaryKey methods in
          > JSP?
          >
          > Thanks in advance.

Help me!! How to use JavaScript with JSP ??

I am using JDeveloper and I created a screen in JSP which uses a bean for database connectivity and retriving info onto the page.
The page has a ListBox where list items are populated from the database.My requirement is
whenever the list is changed the page shuold be refreshed with the selected item info.
I tried to use 'JavaScript' for triggering the event with 'onChange' event of the ListBox.But the event is not getting invoked. I think JavaScript is not working with JSP.
Please help me with how to Use javaScript with JSP or any other alternative where I can meet my requirement.
I have one more question...I have gone through the JSP samples in OTN and I am trying do download the sample 'Travel servlet' which show list of countries...etc
I have also gone through the 'readme' but I don't know how to extract .jar file.
I would be great if you could help me in this.
Thanks!!
Geeta
null

We have a similar need. We have used Cold Fusion to display data from Our Oracle Database. We have a simple SElect Box in HTML populated with the oracle data. When someone selects say the State of Pennsylvania. then we have an On change event that runs a Javascript to go get all the cities in Pennsylvania.
Proble we are having is that inorder for the Javascript to work , we currently have to send all the valid data.
Do you know of any way to dynamically query the the Oracle database in Javascript

How to use taglibs in JSP for Database access

Hi
Could any one please tell me how to use taglibs in JSP for Database access
with regrds
Jojo

This is a sample how to connect to a MySQL database with JSTL 1.0:
<%@ page contentType="text/html; charset=iso-8859-1" language="java" import="java.sql.*" errorPage="" %>
<%@ taglib uri="http://java.sun.com/jstl/sql" prefix="sql" %>
<%@ taglib uri="http://java.sun.com/jstl/core" prefix="c" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>JSTL MySQL</title>
<link href="styles.css" rel="stylesheet" type="text/css" />
</head>
<body>
<c:catch var="e">
<sql:setDataSource var="datasource" url="jdbc:mysql://Your_Server_Name_Here/You_Schema_Here"
                       user="Your_Username_Here" password="Your_Password_Here"
                       driver="com.mysql.jdbc.Driver"/>
<c:out value="datasource= ${datasource}, Class = ${driver.class}"/>
<br />
<br />
<sql:query var="deejays" dataSource="${datasource}">SELECT * FROM Your_Table_Name_Here</sql:query>
<table>
<%-- Get the column names for the header of the table --%>
<c:forEach var="columnName" items="${deejays.columnNames}"><th><c:out value="${columnName}"/></th></c:forEach>
<tbody>
<%-- Get the value of each column while iterating over rows --%>
<c:forEach var="row" items="${deejays.rows}">
<tr><c:forEach var="column" items="${row}">
        <td><c:out value="${column.value}"/></td>
      </c:forEach>
</tr>
</c:forEach>
</tbody>
</table>
</c:catch>
<br />
<br />
<c:if test="${e!=null}"><span class="error">Error</span>�
<c:out value="${e}" />
</c:if>
</body>
</html>And this thread might help you:
http://forum.java.sun.com/thread.jspa?threadID=639471&tstart=44

How to use JOptionPane in jsp, instead of javascript message alert box?

HI,
How to use JOptionPane in jsp,
instead of javascript "message alert box"?
I hate javascript,
I'd like to only use java in jsp. don't use javascript.
javascript is client side,
jsp is server side. i know that.
how to... instead of javascript box?
how to use ... message box in webpage?
don't use applet,,,, don't use javascript,,,
hm...zzzZzz
I hate javascript..T.T
<SCRIPT language=JavaScript>
alert("hate javascript");
</SCRIPT>
===>>>>
In this way,,
JOptionPane.showOptionDialog(null,"I love java")
I'd like to only use jsp and java and html...in webpage.
don't use javascript....
Why? don't sun provide message box in jsp, instead of javascrip box?
Why?
Edited by: seong-ki on Nov 4, 2007 8:38 PM

Drugs are bad, m'kay?

How to use cookies in jsp

Hi all,
I'm new to jsp, please let me know how to use cookies with jsp.
I have three web applications, in run time I have to switch from one application to another application based on single login page. I have taught cookies are one of the solution. But while I'm googling I unable to get such a good material.
please give some examples,
Thanks in advance.
achchayya

Read a cookie in jsp
HttpSession session = request.getSession();
Cookie cookie_session = getCookie(request, "COOKIENAME");
          if (cookie_session == null) {
               sesID = session.getId();
          } else {
               sesID = cookie_session.getValue();
          }or
get all cookie in the browser
This gets all the cookies and according to the cookie name given u can get the cookie value
Cookie[] cookies = request.getCookies();
          if (cookies != null) {
               for (int i = 0; i < cookies.length; i++) {
                    if (cookies.getName().equals(cookieName))
                         return cookies[i];
               }but i am not sure if this works for ur requirement try and see

How to use threads in JSP???

hello
i want to use threads with JSP.
i want to write a jsp page which will
start 2 different threads. the 1st thread should just display a message and the second page should redirect this page to another jsp page.
till the redirection is goin on, the message should be displayed in the browser from the 1st thread.
i dont know actually how to use threads in JSP by implementing the Runnable insterface, if not m then how do i do it ??
thanx
Kamal Jai

Why do you want to use threads to do this ??
If you write a message and do a redirection, the message will be displayed until the other page will be loaded into the browser...
I already launched a thread from a JSP but it was for a four hour process where the user can close his browser windows.

How to use datagrid in jsp ?

Hi All ,
Can any body let me know , how to use datagrid in jsp pages .I have downloaded the taglibs-datagrid.jar file and taglibs-datagrid.tld. I have saved the .jar File in the WEB-INF/lib and .tld to the WEB-INF directories.
I wrote a program that is getting a collection from the request and i just want to display the objects in the datagrid.Please help me out of this problem.It's better to explain with example. Waiting for a response.
Regards,
Rakesh

Why do you want to use threads to do this ??
If you write a message and do a redirection, the message will be displayed until the other page will be loaded into the browser...
I already launched a thread from a JSP but it was for a four hour process where the user can close his browser windows.

How to use EJB Remote with Netbeans7.0 ?

I try to create Session Bean in Netbeans 7.0 but when I select Remote then I have to select Java Application in Netbeans. It different from Netbeans 6.8 ,6.9 which in Netbeans6.8, 6.9 not have dropdown for select Java Application when we choose Remote. So I don't know how to use EJB Remote in Netbeans7.0 then I click finish. After that, I create Project is Enterprise Application Client. but in Main.java at this line
BLSessionRemote obj = (BLSessionRemote)ctx.lookup("TestBean");
It can't find BLSessionRemote in Session Beans. How to use EJB Remote with Netbeans7.0 ?

Why don't you ask this question in the Netbeans mailing lists, where it belongs. Come here when you have problems with code you wrote yourself.

How to use ejb control in jsp

hi,
I created an entity bean and I created an ejb control. Now I would like to
use this ejb control inside of a jsp (no page flow).
When I use the ejb without the control I do the follwing steps :
- get the local home
- call finder methode
- get the local object
- call getMethod() and display content
Can someone please post an example how to use the netui-data tags to do this
steps or do I have to use the controls in a total different way?
Can someone please tell me how to use the ejb control inside a normal java
class?
Michael

Do you want to use taglibs or develop custom tags? Either way take a look at these:
http://java.sun.com/j2ee/tutorial/1_3-fcs/doc/JSPTags.html
http://www.stardeveloper.com/articles/display.html?article=2001081301&page=1
http://www.onjava.com/pub/a/onjava/2000/12/15/jsp_custom_tags.html
http://jakarta.apache.org/taglibs/tutorial.html
http://www.ibm.com/developerworks/edu/j-dw-java-custom-i.html
http://www.herongyang.com/jsp/tag.html

How can use EJB local call in WLS 7.0 without EAR

I have web application as jsp files.
and I made .jar for some EJBs
and I used local call for calling EJB from jsps in WLS 6.1
but in WLS 7.0 .. occured error calling EJB as Local call
while JNDI lookup.
So I packed all applications as EAR and deployed then all works good.
but in developing I want to use JSPs as jsp files.
There is no way to use Local call to EJB in WLS 7.0 without packing EAR ? (like
WLS 6.1)

The way JNDI lookups were implemented in 6.1 allowed to deploy individual ejb-jars
and access their local interfaces via JNDI lookups from other ejb-jars during
development. In production all ejb-jars will be packaged into an ear.
This is extremely helpful on large projects. E.g. my current project has over
120 CMP entity beans and over 40 session beans. Even on 2GHz class machine with
1Gb memory and JDK 1.4 (to enable full-speed debugging) it takes almost a minute
to deploy the ear (no matter whether it is exploded or not). It takes minutes
with 1.3 and debugging turned on.
6.1 implementation allowed to "pre-deploy" relatively static ejb-jars and still
access their local interfaces (by putting them on WL system classpath and deploying
as individual ejb-jars, so classes are accessible to local clients; it requires
WL restart when they are changed, but they don't change often). So during development
only changed jars (typically session facade) need to be redeployed on changes,
which takes only seconds. We didn't have problem with JNDI lookup performance
since we use the EJBHomeFactory pattern.
The behind-the-scene JNDI optimization "improvement" introduced in 7.0 makes it
no longer possible to use this technique, since even though classloading still
works in the same way, no objects are bound to JNDI tree and thus could not be
access from another ejb-jar. This significantly impacts developer productivity
(in our large project). It's not only about minutes lost (which btw makes hours
over time), it just disrupts developer's train of thought to have such long round
trip times. In fact this is the reason we are not going to migrate to WL 7.0.
Is it possible to provide an option to turn this "optimization" off and actually
bind JNDI objects?
Thank you,
Sergey
"Dimitri I. Rakitine" <[email protected]> wrote:
Park <[email protected]> wrote:
Thanks Rakitine.
I wonder if I use EAR while developing could I apply changes to EARwhithout packing
again.Sure - you can simply deploy your app as an 'exploded' EAR during development.
There is no probelm delivering time but in developing time ..
If I can not use that kind of way how can I make modification ?
Plz. let me know.
And I have one more question.
When I use EAR I met some problem.
I packed all JSP into one .war file.
fot that I had to inclde requred classes into .war because jsps usethese classes.
then I packed EAR file with WAR and some EJB jar files.
After then I deployed EAR file to WLS.
But If remove classes from classpth while EJB deploying Error occured.Because
EJBs reference these classes.
I thoght if I packed classes into .WAR .. there is no problem.
But Error occured.
I have to include classes into classpth for that ? or
Any mistakes in my way.No, you do not have to add anything to the system classpath. In fact,
you should
make sure that none of your application classes are in the system classpath.
thank you.
"Dimitri I. Rakitine" <[email protected]> wrote:
Yup, that appears to be the difference between 6.1 and 7.0 - in
6.1 success of a local invocation depended only on the Classloaders
arrangement, so everything worked when you added your classes to the
system classpath. In 7.0 looks like it also depends on the application
context - that's why you cannot do a JNDI lookup from another deployment
unit.
Is there any reason why you do not want to use EAR's ???
Park <[email protected]> wrote:
in WLS 6.1 ..
I have EJB as jar files. (deployed each to WLS)
and I added EJB interface class to classpath.
and I made WebApplication as Directory (not war file).
in that webappication jsp call EJB as Local interface.
These environment .. local call workes well in WLS 6.1.
but in 7.1 not works .. (JNDI look up error)
of course Remote call works well. and If I make EAR .. works well.
Rob Woollen <[email protected]> wrote:
You can have an exploded EAR and have it work.
Can you give some more detail on how you are deploying in 6.1. Is
it
an
exploded EAR, or do you have the ejb interfaces in the classpath?
This behavior should not have changed between 6.1 and 7.0.
-- Rob
park wrote:
I have web application as jsp files.
and I made .jar for some EJBs
and I used local call for calling EJB from jsps in WLS 6.1
but in WLS 7.0 .. occured error calling EJB as Local call
while JNDI lookup.
So I packed all applications as EAR and deployed then all works
good.
but in developing I want to use JSPs as jsp files.
There is no way to use Local call to EJB in WLS 7.0 without packingEAR ? (like
WLS 6.1)
Dimitri
Dimitri

How to connect EJB by JSP??

I kowm,EJB1.1 hadn't been connect by JSP.Now,How to connect EJB2.0 by jsp.
EJB'container/server is woblogic.Thanks for your replaying!!

Hi,everyone,I hava found out its anwsers.
The method :
Now,if we hava writted a EJB,using IAS for conainer/server.
JNDI named "happy".
CODE:
<%@page import="javax.naming.*;"%> //jndi
<%@page import="javax.rmi.PortabieRemoteObject;"%>
//rmi
<%page import="happy.*;%>
//EJB's home/remoteInterface
<%
InitialContext ctx=new InitialConrect();
//Init
Object ref=ctx.lookup("Happy");
//using JNDI,you get Object'sinterface
HappyHome hoppyhome;
happyhome=(SampleHome)PortableRemoteObject.narrow(ref.HappyHome.class);
HappyRemote remote=happyremote.creat();
//forllowing,you can use EJB's method by remote calling.
%>
WELCOME FOR YOUE ADVISE!!!

How to understand EJB and JSP

just now i read some articles about EJB and it make me a little confused in what i have understood about EJB and JSP ( at least i thought i understood them, but now ....()
1. i found that in most JSP examples, the javabeans are used but not the EJB, right? so i have a qustion, an EJB can be used in JSP or not? and how if it can? why if it can not?
...still have a lot of question ....
thanks a lot

Hi,
1. i found that in most JSP examples, the javabeans
are used but not the EJB, right? so i have a qustion,
an EJB can be used in JSP or not? and how if it can?
why if it can not?It can be there for more of the examples,but you can invoke the EJB from the JSP also .Actual EJB is entirely the different concept whose foundation is build on the Distributed Technology.I advice you to read the Mastering EJB which is freely available at http://theserverside.com
before starting coding.The EJB is a vast concept and requires time and strong core foundation to understand,once it is clear then you understand it true potential...
...still have a lot of question ....You queries are welcome here!!!
regards
Vicky

How to use ejbs for accessing Function Module.

Hi,
I want to call ABAP function module using ejb(Since I want to expose them as web service on different server). I know how to do that using Models, but dont know how to go ahead using ejbs.
Could you please guide me on this?
Regards,
Abhijeet.

Hi,
In another thread with a similar question I found these references:
/people/kathirvel.balakrishnan2/blog/2005/07/26/remote-enable-your-rfchosttoip-to-return-host-ip-to-jco
Re: interfacing SAP with an existing java applications
And this code example:
          HashMap result = new HashMap();
          Object ret = new Object();
          JCO.Client mConnection = null;
          mConnection = getConnection();
          JCO.Repository mRepository;
          mRepository = new JCO.Repository("R3", mConnection);
          JCO.Function function =
               createFunction("Z_ISA_GET_ORDER_ITEM_INFO", mRepository);
          function.getImportParameterList().setValue(orderNum, "ORDER");
          if (function != null) {
               mConnection.execute(function);
               JCO.Table codes = function.getTableParameterList().getTable("INFO");
               for (int i = 0; i < codes.getNumRows(); i++) {
                    codes.setRow(i);
                    int tmp = new Integer(codes.getString("POSNN")).intValue();
                    String tmpStr = new String(Integer.toString(tmp));
                    ret = result.put(tmpStr, codes.getString("VBELN"));
          } else {
               System.out.print("Fxn call failed for Z_ISA_GET_ORDER_ITEM_INFO");
          JCO.releaseClient(mConnection);
Good luck,
Roelof

How To Use EJB in JSP

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