EJB lookup from another EJB server

Hi people,
I have two application servers on two different computers. One
of them contains an EJB, which I need to access from another EJB
server. I know that I can achieve this using RMI, but will then
security and transaction contexts be propagated to the called
EJB?
Sincerely,
Sergei Batiuk.

Here is the solution posted on another forum:
[email protected] Dec 8, 6:03 am show options
Newsgroups: ibm.software.websphere.studio
From: [email protected]
Date: 8 Dec 2004 06:03:04 -0800
Local: Wed, Dec 8 2004 6:03 am
Subject: Re: EJB lookup on from one server to another does not work
Eric,
I dealt with this same problem trying to run 2 local servers (websphere
test servers), using 2 separate WSAD 5.1.2 workspaces. Running on 1
server I have an application that contains an EJB, and running on the
other server is an application that uses an access bean to make a
remote call to my EJB, running on my other server. I too repeately
received the "NameNotFoundException" when trying to lookup my EJB home
reference.
What you have to do to get around this is to modify the server
configuration of the application that contains the EJB that you are
attempting to call remotely. You must open the the server.wsi file for
the server that is running the EJB and go to the "Configuration" tab.
You must check the "Enable administrative console". Once this is
complete, start your server. When it is started, right click on the
server, and select "run administrative console". In the admin console,
select
servers -> application servers -> <your server> -> end points ->
bootstrap address. For "host" you must change "localhost" to either
your ip address or computer name (ive only tried my ip, but your
computer name should work too). When building your properties to get
the initial context, make sure you use
"env.put(Context.PROVIDER_URL, "corbaloc:iiop:<the ip or computer name
listed as the bootstrap host of server running ejb>:<the port listed as
the bootstrap port of server running ejb, which is 2809 in your case>
Restart your server and things should work.

Similar Messages

Calling EJB from another EJB

I need to make a several calls to the methods inside EJB1 from EJB2. I was getting
the remote reference of the EJB2 inside the ejbCreate() of the EJB1, is it a good
practice ?? If not, do I need to get remote reference of the EJB2 every time I
need to call EJB2 method??
Thanks in advance.

To refer a Ejb from another Ejb include <ejb-ref> in ejb-jar.xml
<session>
<ejb-name>Ejb1</ejb-name>
<ejb-ref>
<ejb-ref-name>Ejb2</ejb-ref-name>
<ejb-ref-type>Entity</ejb-ref-type>
<home>com.ejb.Ejb2Home</home>
<remote>com.ejb.Ejb2</remote>
</ejb-ref>
<session>
Include a <reference-discriptor> in weblogic-ejb-jar.xml
<weblogic-enterprise-bean>
<ejb-name>EjbSession</ejb-name>
<reference-descriptor>
<ejb-reference-description>
<ejb-ref-name>Ejb2</ejb-ref-name>
<jndi-name>com.ejb.Ejb2Home</jndi-name>
</ejb-reference-description>
</reference-descriptor>
</weblogic-enterprise-bean>
In Ejb1 bean class refer to Ejb2 method with a remote reference to Ejb2.
InitialContext initialContext = new InitialContext();
Ejb2Home ejb2Home = (Ejb2Home)initialContext.lookup("com.ejb.Ejb2Home");
Ejb2 ejb2 = ejb2Home.findByPrimaryKey();
Alex Pratt wrote:
I need to make a several calls to the methods inside EJB1 from EJB2. I was getting
the remote reference of the EJB2 inside the ejbCreate() of the EJB1, is it a good
practice ?? If not, do I need to get remote reference of the EJB2 every time I
need to call EJB2 method??
Thanks in advance.

Error in calling an EJB from another EJB

Hello All,
I have a scenario where i need to call a method of an ejb from another ejb.
Both the EJB's are in different DC's.
EG: DC1 using DC2
I have added the public part of DC2 in DC1.
The following code is written in DC1 to access the EJB of DC2
      MyRemote l_remote;
       MyHome l_home;
       InitialContext l_ctx = new InitialContext();
>>       l_home = (MyHome)l_ctx.lookup("JNDI Name");
       l_remote = (MyRemote)l_home.create();
There is no error at build time and deploy time, but at run time "MyHome" class is not found.
Even i am not able to access the helper class defined in the DC2 at runtime.
Please help.
Thanks in Advance

First off, wrong forum section.
Check if your JNDI name is correctly placed for the bean you're calling -- check j2ee-engine.xml for that. Check the EJB container if the ear file you deployed is there and updated.
Try placing "localejbs/JNDI name" on your lookup parameter.
Regards,
Jan

HT3678 If I download a .mov file from gmail, I am not able to open the file. I reinstalled QuickTime 7.6.6, still unable to open the file. If I download the same file from another mail server I have no trouble. What is gmail doing to my file?

If I download a .mov file from gmail, I am not able to open the file. I reinstalled QuickTime 7.6.6, still unable to open the file. If I download the same file from another mail server I have no trouble. What is gmail doing to my file?

Also i have reinstalled the reader9 two times and tried with reader8 also but in both the cases same problem.
it would be gr8 help if someone can help.

Issue in executing an application from another remote server

Hi Experts,
I have an application on one of the remote server which is running on Windows Server 2003.
I would like to execute this application from another remote server (also running on Windows Server 2003). I am able to browse the application path using "\\", but when double clicking on the application
gives "you may not have appropriate permission to access the item"
How do I set the permission & what permission is required?
Please anybody can explain?
Thanks in advance.
Regards,
Naveen J V

Is this a single exe file, or is it part of an installed application with exe, dlls, registery settings, etc?
If this is an installed application, you cannot run it like this. That would be like trying to start microsoft office which is installed on a different computer.

RMAN backup from another DB server

Hi all,
I would like to know Can we take a rman backup from another DB server in oracle 9.2...
i.e
suppose that we have two server
1. main server
2. dup server
I want to take a backup of main server throeugh dup server.....
if it is poosible then what are all the things that i have to configure....
pls suggest me.....

getting an error,
here hotest is the main db
and testho is dup db
F:\Documents and Settings\deepali>rman target rman/cat@hotest catalog rman/cat@testho
Recovery Manager: Release 9.2.0.4.0 - Production
Copyright (c) 1995, 2002, Oracle Corporation. All rights reserved.
connected to target database: HOTEST (DBID=982176707)
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-00554: initialization of internal recovery manager package failed
RMAN-04004: error from recovery catalog database: ORA-01045: user RMAN lacks CRE
ATE SESSION privilege; logon denied
F:\Documents and Settings\deepali>sqlplus /nolog
SQL*Plus: Release 9.2.0.4.0 - Production on Mon Apr 6 12:17:13 2009
Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
SQL> conn sys/deepali as sysdba
Connected.
SQL> GRANT RECOVERY_CATALOG_OWNER TO rman;
Grant succeeded.
SQL> GRANT CONNECT, RESOURCE TO rman;
Grant succeeded.
SQL> exit
Disconnected from Oracle9i Enterprise Edition Release 9.2.0.4.0 - Production
With the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.4.0 - Production
F:\Documents and Settings\deepali>rman target rman/cat@hotest catalog rman/cat@t
estho
Recovery Manager: Release 9.2.0.4.0 - Production
Copyright (c) 1995, 2002, Oracle Corporation. All rights reserved.
connected to target database: HOTEST (DBID=982176707)
connected to recovery catalog database
recovery catalog is not installed
RMAN> register database;
recovery catalog is not installed
recovery catalog is not installed
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of register command at 04/06/2009 12:18:09
RMAN-06429: RCVCAT database is not compatible with this version of RMAN
RMAN> select * from rc_database;
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-00558: error encountered while parsing input commands
RMAN-01005: syntax error: found "identifier": expecting one of: "allocate, alter
, backup, beginline, blockrecover, catalog, change, connect, copy, create, cross
check, configure, duplicate, debug, delete, drop, exit, endinline, host, {, libr
ary, list, mount, open, print, quit, recover, register, release, replace, report
, renormalize, reset, restore, resync, rman, run, rpctest, set, setlimit, sql, s
pool, startup, shutdown, send, show, test, upgrade, validate"
RMAN-01008: the bad identifier was: select
RMAN-01007: at line 1 column 1 file: standard input
RMAN>pls suggest me whether i am following the right path or not...

Creating Ejb link to another Weblogic server

I am trying to create a EJB jndi link to another weblogic server from a weblogic
server.
Basically I have a web application that uses an EJB that is deploed on another
weblogic server and I would like to connect to it.
One way I can do is the remote lookup using the Hashtable and the context factory,
something like this
Hashtable props = new Hashtable();
props.put(Context.INITIAL_CONTEXT_FACTORY, "weblogic.jndi.WLInitialContextFactory");
props.put(Context.PROVIDER_URL, "t3://localhost:7001/");
Context context = new InitialContext(props);
I used a jndi-link in resin previously, that did not require me to do a remote
lookup and rather created a link at the server level and allowed me to do a direct
InitialContext() lookup.
<jndi-link>
<jndi-name>java:comp/env/ejb/test</jndi-name>
<jndi-factory>weblogic.jndi.WLInitialContextFactory</jndi-factory>
<init-param java.naming.provider.url="t3://xx.x.x.x:7001"/>
<jndi-lookup>ejb.test</jndi-lookup>
</jndi-link>
Can I do something similar in Weblogic? If yes, how can I do it.
Appreciate your help.
Thanks,
Varun

"Varun Garg" <[email protected]> wrote:
>
I am trying to create a EJB jndi link to another weblogic server from
a weblogic
server.
Basically I have a web application that uses an EJB that is deploed on
another
weblogic server and I would like to connect to it.
One way I can do is the remote lookup using the Hashtable and the context
factory,
something like this
Hashtable props = new Hashtable();
props.put(Context.INITIAL_CONTEXT_FACTORY, "weblogic.jndi.WLInitialContextFactory");
props.put(Context.PROVIDER_URL, "t3://localhost:7001/");
Context context = new InitialContext(props);
I used a jndi-link in resin previously, that did not require me to do
a remote
lookup and rather created a link at the server level and allowed me to
do a direct
InitialContext() lookup.
<jndi-link>
<jndi-name>java:comp/env/ejb/test</jndi-name>
<jndi-factory>weblogic.jndi.WLInitialContextFactory</jndi-factory>
<init-param java.naming.provider.url="t3://xx.x.x.x:7001"/>
<jndi-lookup>ejb.test</jndi-lookup>
</jndi-link>
Can I do something similar in Weblogic? If yes, how can I do it.
Appreciate your help.
Thanks,
Varun
hi,
Yes, it is possible in weblogic for more info visit this url,
http://e-docs.bea.com/wls/docs70/ejb/reference.html#1221067
u have the description of how to use the below tags
<initial-context-factory>weblogic.jndi.WLInitialContextFactory</initial-context-factory>
<provider-url>WeblogicURL:Port</provider-url>
<indi-name>jndiweb</jndi-name>
hope it help u
regards,
Elango TR

HELP!!! How I can call to EJB from another EJB??

I have two EJBs, for each EJB I have a jar, how I can call to EJB jar to another???
I have tried the following, in the first EJB I have import the second EJB jar and call it with context, lookup, PortableRemoteObject etc.. but the instruction lookup not find the second EJB reference.
The name in the lookup instruction is the JNDI name of the second EJB but not find a reference to it.
Please help me!!! Thanks!!
The error is:
javax.naming.NameNotFoundException: Missing node. Root exception is org.omg.CosNaming.NamingContextPackage.NotFound
     at org.omg.CosNaming.NamingContextPackage.NotFoundHelper.read(NotFoundHelper.java:34)
     at org.omg.CosNaming.NamingContextPackage.NotFoundHelper.extract(NotFoundHelper.java:50)
     at org.omg.CosNaming._NamingContextStub.resolve(_NamingContextStub.java:161)
     at com.inprise.j2ee.jndi.java.CorbaContext.resolveName(CorbaContext.java:242)
     at com.inprise.j2ee.jndi.java.CorbaContext.lookup(CorbaContext.java:261)
     at com.inprise.j2ee.jndi.java.javaContext.internal_lookup(javaContext.java:483)
     at com.inprise.j2ee.jndi.java.javaContext.internal_lookup(javaContext.java:493)
     at com.inprise.j2ee.jndi.java.javaContext.internal_lookup(javaContext.java:493)
     at com.inprise.j2ee.jndi.java.javaContext.lookup(javaContext.java:937)
     at com.inprise.j2ee.jndi.java.javaContext.lookup(javaContext.java:942)
     at javax.naming.InitialContext.lookup(InitialContext.java:350)
     at ejbclient.EnterpriseClientBean.addition(EnterpriseClientBean.java:115)
     at ejbclient.EnterpriseClientBean.actionPerformed(EnterpriseClientBean.java:97)
     at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1450)
     at avax.swing.AbstractButton$ForwardActionEvents.actionPerformed(Abstr

ok.. Here it goes.. I am writing a sample code..
public class EJB1LogBean implements SessionBean {
// test is a method of stateless session beam
public void test ( TestVal val )
throws RemoteException{
try {
EJB2LogHome ejb2Home= (EJB2LogHome)getHome("java:comp/env/ejb/EJB2LogHome",1);
EJB2Log ejb2Log = ejb2LogHome.create ( val );
} catch ( CreateException e ) {
     System.out.println("Create Exception occurred ");
     e.printStackTrace();
     } catch ( RemoteException e ) {
     System.out.println( "RemoteException Occured");
e.printStackTrace();
     throw new RemoteException () ;
     } catch(Exception ee) {
ee.printStackTrace();
private EJBHome getHome(String jndiName,int type) {
try {
Context context = new InitialContext();
Object ref = context.lookup( jndiName );
switch(type)
case 1:
EJB2LogHome ejb2LogHome = ( EJB2LogHome )
PortableRemoteObject.narrow( ref, EJB2LogHome.class );
return ejb2LogHome;
} catch ( Exception e ) {
e.printStackTrace();
return null;
}//EJB1LogBean ends
Here as you can see, EJB1LogBean(session bean) is calling a second EJB, EJB2LogBean (entity bean). TestVal is a sample value object passed. It is plain java class and can vary from app to app and it has got nothing to do with ejbs.
"java:comp/env/ejb" is a J2EE standard and while getting a home interface, you have to append the home interface class name to "java:comp/env/ejb". Here I am passing "java:comp/env/ejb/EJB2LogHome" and "1" to getHome method, whose job is to get a reference to a home interface. getHome method is a local method. "1" is passed just to give a flexibility to getHome method as you can have more ejbs to invoked. In that case, you can go on adding different case statements for 2, 3 etc.
The only thing you have to keep in mind is that your deployment descriptor for EJB1LogBean will contain the entires for both the beans i.e. for EJB1LogBean and EJB2LogBean. This is because EJB2LogBean is wrapped by EJB1LogBean.
Hope this helps.
Please let me know if you need anything more.
- Amit

How tom invoke an EJB from another EJB using the sun rmi protocl in Weblogi

Hi,
I am particularly new to EJB.
My scenario is
client invoking-->EJB-----invoking ----(Either a webService or an EJB)
in WEBLOGIC
Is it possible that a call from EJB to another EJB or WebService use Sun's RMI as underlying protocol instead of t3 or IIOP which are used in Weblogic ?
Would be really a great help if you could provide me some sample on it on weblogic.

Hi Stefan,
You don't need to provide the InitialContextFactory for running a standalone client. The following should work just fine:
Context initial = new InitialContext();
System.out.println("Looking up ...");
Object objref = initial.lookup(EJB); //the lookup name should be a global JNDI name //and not from the java:comp namespace
System.out.println("Looked up EJB");The JNDI implementation looks for the jndi.properties file in your classpath. So make sure that you have the appserv-rt.jar from your <server_installation>/lib directory in your classpath.
HTH,
Sheetal

JNDI EJB Lookup fails on Remote Server

Hi,
I am having two different domain (domain1,domain2) respectvely. My ABC.ear j2eee application is deployed on domain2 and its iiop port is 33703.In domain1 i have xyz.war (web application) and it's IIOP port is 3700 .In xyz.war i am having CallEJB.jsp file.In this Jsp file i want to lookup an EJB Service called PaymentEJB(JNDI Name is ejb/PaymentEJB).
The code is below
InitialContext context=new InitialContext();
Object objRef=context.lookup("corbaname:iiop:andaman:33703#ejb/PaymentEJB");
I am getting the following error.
[#|2005-12-14T16:42:03.422+0530|SEVERE|sun-appserver-pe8.1_02|javax.enterprise.resource.corba._DEFAULT_.rpc.transport|_ThreadID=11;|"IOP00410216: (COMM_FAILURE) Unable to create IIOP listener on the specified host/port: all interfaces/3700"
org.omg.CORBA.COMM_FAILURE: vmcid: SUN minor code: 216 completed: No
at com.sun.corba.ee.impl.logging.ORBUtilSystemException.createListenerFailed(ORBUtilSystemException.java:2661)
My doubt is
1.While starting domain1 and domain2 iiop listeners are started on the port 3700 and 33703.in that case why EJB lookup tries to create listener on one more time.
2.I am looking the 33703 port only.but it tries to create port on 3700 why?
3.It was working till JES2005Q1.Is there any patch i need to install? or i need to change anything in my code.
I am frustrated with this error for past one week.I will be happy if some body will give me the peace of mind(thru some solution).

http://docs.sun.com/source/819-0079/dgjndi.html
This might help.

Can EJB method return another EJB?

Hello,
I am new to EJB technology. I am working with Sun Application Server bundled in Netbeans 4.1
Is it po[b]ssible a method of a session bean to return another EJB which is instantiated with arguments depended on the method?
If no, is there an alternative way?
thank you in advance, Kostas

Is it possible within the SessionBean method to
call another Session Bean, create it using the
local interface, pass some parameters using setter
methods, then cast it from local interface to
remote and send it to the user?I think it's not possible casing Local Interface into Remote Intrface, because they inherit from different classes.
Remote interface extends EJBObject and Local interface extends EJBLocalObject
Fil

Can anyone help me with the commands to import and restore backup from another administrative server

Dear all.
Can anyone help me with the commands to import and restore backup from another administrative server

I tried, even with code tags it looks the same since the 2500 character limit is exceeded.
Please post just the relevant parts inside tags as mentioned, and choose a descriptive subject line.
I'm locking this thread.
Thomas

How to call an EJB from another EJB

Hi
I have a problem here. I need to execute a second EJB which has to get the input from the first EJB as data for execution. So when I call the first EJB, the first EJB should give the data to the second EJB and execute it and provide the result.
Cheers,
Raj

ok.. Here it goes.. I am writing a sample code..
public class EJB1LogBean implements SessionBean {
// test is a method of stateless session beam
public void test ( TestVal val )
throws RemoteException{
try {
EJB2LogHome ejb2Home= (EJB2LogHome)getHome("java:comp/env/ejb/EJB2LogHome",1);
EJB2Log ejb2Log = ejb2LogHome.create ( val );
} catch ( CreateException e ) {
     System.out.println("Create Exception occurred ");
     e.printStackTrace();
     } catch ( RemoteException e ) {
     System.out.println( "RemoteException Occured");
e.printStackTrace();
     throw new RemoteException () ;
     } catch(Exception ee) {
ee.printStackTrace();
private EJBHome getHome(String jndiName,int type) {
try {
Context context = new InitialContext();
Object ref = context.lookup( jndiName );
switch(type)
case 1:
EJB2LogHome ejb2LogHome = ( EJB2LogHome )
PortableRemoteObject.narrow( ref, EJB2LogHome.class );
return ejb2LogHome;
} catch ( Exception e ) {
e.printStackTrace();
return null;
}//EJB1LogBean ends
Here as you can see, EJB1LogBean(session bean) is calling a second EJB, EJB2LogBean (entity bean). TestVal is a sample value object passed. It is plain java class and can vary from app to app and it has got nothing to do with ejbs.
"java:comp/env/ejb" is a J2EE standard and while getting a home interface, you have to append the home interface class name to "java:comp/env/ejb". Here I am passing "java:comp/env/ejb/EJB2LogHome" and "1" to getHome method, whose job is to get a reference to a home interface. getHome method is a local method. "1" is passed just to give a flexibility to getHome method as you can have more ejbs to invoked. In that case, you can go on adding different case statements for 2, 3 etc.
The only thing you have to keep in mind is that your deployment descriptor for EJB1LogBean will contain the entires for both the beans i.e. for EJB1LogBean and EJB2LogBean. This is because EJB2LogBean is wrapped by EJB1LogBean.
Hope this helps.
Please let me know if you need anything more.
- Amit

EJB lookup from Tomcat deployed on J2ee Engine

Hello All,
I have a jsf application which runs on tomcat, Now I developed a EJB (stateless) in NWDS and deployed on SAP j2ee engine, when I run a plain java calss I am able to access it but not through my web-app. Can anybody throw some light on why this is happening?
Thanks in Advance
Somil

Hello All,
I have a jsf application which runs on tomcat, Now I developed a EJB (stateless) in NWDS and deployed on SAP j2ee engine, when I run a plain java calss I am able to access it but not through my web-app. Can anybody throw some light on why this is happening?
Thanks in Advance
Somil

Problem in extracting data from another BW server

Hello Experts
I have two BW servers in landscape. One is used as stagins server and second server exctracts data form this server and is used as reporting server.
I can see data in DSOs in stagins server, also checked export datasources in RSA3 in staging server and works fine.
In reporting server delta infopackage runs fine but extracts 0 records. i tryied deleting and redoing init still dosent help. its not throwing any error.
what could be problem and how can i troubleshoot and correct it?
Thanks in advance
Regards
Sudeep

Try these Steps:
1.Replicate and activate the datasource(if BI 7) else activate Transfer Rules.
2.Create an infopackage without selections as Full update and run..
3.If no records are still coming (0) then check the RFC connection b/n Staging & Reporting BI.
Go to SM59 ,first in Reporting BI and chk the :authorizaiton test & rfc test
again go to Staging BI and test for RFC connection to Reporting BI -->authorization test & rfc test
Sometimes password etc are changed just be careful and chk them properly.
4.create a Dummy DSO and load data to it from flat file on staging server.Now replicate its export datasource to Reporting BI.
If you can load data to PSA of this dummy datasource then there is some other problem.If there is no record comign then definately you need to go through step-1 to 3.
Regards,
RK

EJB lookup from another EJB server

Similar Messages

Maybe you are looking for