Calling EJB from ApplicationLifecycleListener
In preStop and postStart of ApplicationLifecycleListener (weblogic.application.ApplicationLifecycleListener) implementation, I want to call a method of a Stateless Session Beans, say MyEJB. MyEJB is packaged in same EAR. I do not want to hard-code the Global JNDI name of MyEJB in Listener implementation. How can I lookup MyEJB in listener class and call its method? Is there some way to pass JNDI name of MyEJB in configurable manner?
Thanks
Sadly, the only context you can give the applicationlifecyclelistener declaritively is security (run-as):
http://e-docs.bea.com/wls/docs100/programming/lifecycle.html
This not only affects ejbs, but also your ability to use a workmanager in the lifecycle listener
As such, you can take 3 routes:
1 Ask bea for a feature request for comp:env like resource refs
2 hard-code global jndi name
3 lookup global jndi name via jmx at runtime
The JMX route is a bit of a paste, so please let me know, if you are interested.
Regards,
-Adrian
Similar Messages
-
Hello Developers!
I deployed my ejb to OAS4081. I call that
from JDeveloper so it good. But when I try
to call from applet in IExpl5 I can't
instantiate the ORB. I've got a com.ms.security.SecurityException : oracle.oas.orb.CORBA.ORB.init
I coded the CLASSPATH(oasoorb(yoj),client,
ejbapi...) perfectly, I think.
If anybody could help, please...
Thanx!Hi there,
I saw someone on this group had a problem to locate proper classpath
to call EJB from JSP. I thought if you call EJB from classpath, you are
calling the bean. But you loss all the EJB functions. To be able to utilize
EJB features like object pooling. You need to call it from Weblogic server
using url/jndi, not from the jar directly.
Any comment? Am I right?
BTW, my question about calling EJB from JSP means calling through URL,
not a local path.
Thank you
>-------------------------------------------------------------------->
Jim wrote in message <[email protected]>...
>Hi there,
> Can I call EJB from JSP? Is there a particular security setting or
>concern for Weblogic? Is there an coding example?
>
>Thank you
>
>
-
Calling EJB from Java Stored Procedures
Hi,
I am trying to call an Enterprise Java Bean from stored procedure. This stored procedure calls a java program. As long as it is a simple java program it works fine and loadjava.exe does not give any problem (neither compile-time nor run-time).
It is not working when I am trying to call EJB from it. It is giving compile-time error.
If anybody has implemented the same please suggest how to go forward.
thanks in advance,
Shashank AgarwalI tried the same thing without any luck. I assume you are using OC4J for your EJB ...
The compiling issue may be because you don't have the classes in your EJB client jar loaded into the database. Once those classes are loaded, you should loadjava without any problem.
However, you won't be able to call the EJB server because the EJB client (your Java code in the DB) will need the OC4J environment (oc4j.jar). I have tried to load oc4j.jar into the DB as well, and that was a big mess and nothing worked. My DB is 8.1.7, maybe the new 9i have OC4J libs bundled?!?
I looked around and only found 2 alternatives:
1. Write a JSP page that acts like an EJB client, then use URLConnection in your DB java code to send params to the JSP for it to invlode the EJB
2. Replace the JSP with RMI code, and use RMI instead of URLConnection in your DB code to invloke the EJB client.
If you find any other solution, please share it here.
Good luck!
Hi,
I am trying to call an Enterprise Java Bean from stored procedure. This stored procedure calls a java program. As long as it is a simple java program it works fine and loadjava.exe does not give any problem (neither compile-time nor run-time).
It is not working when I am trying to call EJB from it. It is giving compile-time error.
If anybody has implemented the same please suggest how to go forward.
thanks in advance,
Shashank Agarwal -
Calling EJB from other EJB on other J2EE Server
Can I call EJB from other EJB on other J2EE Server
Servers - Websphere 5.0
Do i require home & remote interface of that ejb on client side also
Help me, pleasethe problem is actually i require that is specific to websphere
for example i want to call a method ion that ejb
say my ejb name is myejb
so the normal way i should call is
InitialContext initialContext = new InitialContext();
Object homeObject = initialContext.lookup("ejb/MyEjbHome");
MyEJBHome myEJBHome =(MYEjbHome )javax.rmi.PortableRemoteObject.narrow(homeObjectMYEjbHome.class);
myEJB = lSHome.create();
myEJB.someMethod();
but here i am having class for home and remote available
now if other app server i am not having this classes then what to do -
Calling EJB from from a client app
Hi all,
I am trying to call an EJB component from portal. The example EJB I have taken is from SDN Bonus Calculator example - Application Server/Web Dynpro/Samples and Tutorials/Using EJBs (20)
I deployed the EAR file - no issue
I wrote the following code in a client app and trying to connect to the EJB remotely.
try {
java.util.Properties properties = new Properties();
properties.put(Context.INITIAL_CONTEXT_FACTORY, "com.sap.engine.services.jndi.InitialContextFactoryImpl");
properties.put(Context.PROVIDER_URL, "ux0800:55304");
InitialContext ctx = new InitialContext(properties);
//InitialContext ctx = new InitialContext();
// get ejb home
home =
(BonusCalculatorLocalHome) ctx.lookup(
"localejbs/MySessionBean");
theCalculator = home.create();
} catch (Exception namingException) {
namingException.printStackTrace();
I get the following error
javax.naming.NoInitialContextException: Cannot instantiate class: com.sap.engine.services.jndi.InitialContextFactoryImpl [Root exception is java.lang.ClassNotFoundException: com.sap.engine.services.jndi.InitialContextFactoryImpl]
at javax.naming.spi.NamingManager.getInitialContext(Unknown Source)
at javax.naming.InitialContext.getDefaultInitCtx(Unknown Source)
at javax.naming.InitialContext.init(Unknown Source)
at javax.naming.InitialContext.<init>(Unknown Source)
at com.sap.bonus.calculation.sessionBean.MyCommandBean.<init>(MyCommandBean.java:27)
at com.sap.bonus.calculation.sessionBean.MyCommandBean.main(MyCommandBean.java:68)
Caused by: java.lang.ClassNotFoundException: com.sap.engine.services.jndi.InitialContextFactoryImpl
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at com.sun.naming.internal.VersionHelper12.loadClass(Unknown Source)
Any clue will be appreciated.
thnxHi Sabbir,
Following code works for me in calling EJB from normal java application. Did you added the jar files to your application?. see the required jar files in end of code.
Create simple java applcation do the following steps:
Give JNDI name to the EJB(HelloJNDI)->Add the HelloEJB to HelloEAR ->deploy
Proxy Program to call ejb:
import javax.naming.Context;
import javax.naming.InitialContext;
import com.sample.Hello;
import com.sample.HelloHome;
public class HelloTest {
public static void main(String[] args) {
Hello remote = null;
try {
Context ctx = new InitialContext();
HelloHome home = (HelloHome) ctx.lookup("HelloJNDI");
remote = home.create();
String result = remote.hello();
System.out.print("Result:" + result);
} catch (Exception e) {
System.out.println("Exception:" + e.getLocalizedMessage());
1. Go To Run > Java Application ->New->select your project and select your main class(java program from which your going to call EJB)
2. Click next tab ->(x)=Arguments
paste the following code in VM Arguments
-Djava.naming.factory.initial=com.sap.engine.services.jndi.InitialContextFactoryImpl -Djava.naming.provider.url=localhost:50104
replace the server IP address with your server IP address where your ejbs are running.
Under Class path settings for the program put the following jar files.
You can search for them from net weaver soruce folders
or copy from D:\usr\sap\J2E\JC01\j2ee\j2eeclient
ejb20.jar
logging.jar
exception.jar
sapj2eeclient.jar
Add Corresponding ejb.jar
and RUN >>>
this makes testing of your client programs easier, you can find the error trace on which line and saves lot of time.
Regards, Suresh -
Hello, everybody,
I'm very new at EJB and I'm trying to learn it.
I have created Enterprise Application using Netbeans IDE, I have EJB and APP client. What I want is to connect to my MySql database and get some info from table.
For e.g. Login and Password.
How can I call EJB from my client app which connects to my database and gets information I need?What server you are using?
if you use jboss AS ,here is a simple Main class how to connect EJB and access ejb methods:
package com.david.ejb.client;
import java.util.Properties;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.rmi.PortableRemoteObject;
import com.david.ejb.domain.Person;
import com.david.ejb.domain.PersonRemote;
public class Main {
public static void main(String[] args) {
try {
Context ctx = getInitialContext();
Object obj = ctx.lookup("PersonSessionRemote/remote");
PersonRemote pr=(PersonRemote)PortableRemoteObject.narrow(obj, PersonRemote.class);
Person p=new Person();
p.setName("david");
pr.addPerson(p);
pr.findPerson(1);
// System.out.print(br.find(pk).getAuthor_name());
} catch (Exception ex) {
ex.printStackTrace();
private static Context getInitialContext() throws NamingException {
Properties p = new Properties();
p.setProperty(Context.INITIAL_CONTEXT_FACTORY, "org.jboss.naming.NamingContextFactory");
p.setProperty(Context.URL_PKG_PREFIXES, "org.jboss.naming:org.jnp.interfaces");
p.setProperty(Context.PROVIDER_URL, "jnp://localhost:1099");
return new InitialContext(p);
}Person is ant @Entity and PersonRemote is remote interfaces, to connect database you have to make datasource file at jboss-4.2.3.GA\server\default\deploy
simle mysql-ds.xml looks like this:
datasources>
<local-tx-datasource>
<jndi-name>some name</jndi-name>
<connection-url>jdbc:mysql://localhost:3306/dbname</connection-url>
<driver-class>com.mysql.jdbc.Driver</driver-class>
<user-name>root</user-name>
<password>root password</password>
<min-pool-size>5</min-pool-size>
<max-pool-size>100</max-pool-size>
<idle-timeout-minutes>15</idle-timeout-minutes>
<exception-sorter-class-name>com.mysql.jdbc.integration.jboss.ExtendedMysqlExceptionSorter</exception-sorter-class-name>
<valid-connection-checker-class-name>com.mysql.jdbc.integration.jboss.MysqlValidConnectionChecker</valid-connection-checker-class-name>
</local-tx-datasource>
</datasources>also at resources/META-INF directory you must have persistence.xml like this
<persistence>
<persistence-unit name="SimpleEjb">
<jta-data-source>java:/some name</jta-data-source>
<properties>
<property name="hibernate.hbm2ddl.auto" value="update" />
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect" />
<property name="hibernate.show_sql" value="true"/>
<property name="hibernate.format_sql" value="true"/>
</properties>
</persistence-unit>
</persistence> -
Calling EJB from class in same ear
Has anyone ever attempted to call an EJB from a class that is in the same ear?
I have a singleton class, not
another EJB, that is trying to get ahold of an EJB to call a method. This method
has been defined to have both
a local and remote interface.
I thought I should be able to get a hold of the local interface. When I try to
get the interface out of JNDI
as follows:
PickupCpaLocalHome cpaHome = (PickupCpaLocalHome) ctx.lookup("pickup.PickupCpaEJBLocal");
I get an exception:
javax.naming.LinkException: [Root exception is
javax.naming.NameNotFoundException: Unable to resolve
'app/ejb/PickupCpaEJB.jar#PickupCpaEJB/local-home' Resolved: 'app/ejb'
Unresolved:'PickupCpaEJB.jar#PickupCpaEJB' ; remaining name
'PickupCpaEJB.jar#PickupCpaEJB/local-home']; Link Remaining Name:
'java:app/ejb/PickupCpaEJB.jar#PickupCpaEJB/local-home'
When I look at the JNDI tree using the WebLogic console, it shows that "pickup.PickupCpaEJBLocal"
is
in JNDI.
Since the local interface doesn't work, I thought I'd try the remote interface.
The remote interface
works fine from my client and from another EJB in a different ear. Using the
remote interface I get an
exception when trying to cast the result to my home.
java.lang.ClassCastException:
com.fedex.pickup.j2ee.ejb.cpa.PickupCpaEJB_gapk5_HomeImpl_WLStub
// Code
PickupCpaHome cpaHome = (PickupCpaHome) ctx.lookup("pickup.PickupCpaEJBRemote");
As I mentioned earlier, the same code works in a client and in an EJB in another
ear.
Any ideasHas anyone ever attempted to call an EJB from a class that is in the same ear?
I have a singleton class, not
another EJB, that is trying to get ahold of an EJB to call a method. This method
has been defined to have both
a local and remote interface.
I thought I should be able to get a hold of the local interface. When I try to
get the interface out of JNDI
as follows:
PickupCpaLocalHome cpaHome = (PickupCpaLocalHome) ctx.lookup("pickup.PickupCpaEJBLocal");
I get an exception:
javax.naming.LinkException: [Root exception is
javax.naming.NameNotFoundException: Unable to resolve
'app/ejb/PickupCpaEJB.jar#PickupCpaEJB/local-home' Resolved: 'app/ejb'
Unresolved:'PickupCpaEJB.jar#PickupCpaEJB' ; remaining name
'PickupCpaEJB.jar#PickupCpaEJB/local-home']; Link Remaining Name:
'java:app/ejb/PickupCpaEJB.jar#PickupCpaEJB/local-home'
When I look at the JNDI tree using the WebLogic console, it shows that "pickup.PickupCpaEJBLocal"
is
in JNDI.
Since the local interface doesn't work, I thought I'd try the remote interface.
The remote interface
works fine from my client and from another EJB in a different ear. Using the
remote interface I get an
exception when trying to cast the result to my home.
java.lang.ClassCastException:
com.fedex.pickup.j2ee.ejb.cpa.PickupCpaEJB_gapk5_HomeImpl_WLStub
// Code
PickupCpaHome cpaHome = (PickupCpaHome) ctx.lookup("pickup.PickupCpaEJBRemote");
As I mentioned earlier, the same code works in a client and in an EJB in another
ear.
Any ideas -
Calling EJB from JSP in SSL Mode
Hi,
I need to call an EJB from JSP in SSL Mode.
How can i do that.
Regards,
S.V.Satish KumarIn that case you can refer to the following documents:
Using JPA: http://help.sap.com/saphelp_nwce711/helpdata/en/44/eba6292f446c30e10000000a114a6b/frameset.htm
Accessing persistence functionality in EJB 3.0: http://help.sap.com/saphelp_nwce711/helpdata/en/46/307a2a50094f09e10000000a114a6b/frameset.htm
Tell me, if these documents help you. Otherwise, I will search for more information on the topic.
Best regards,
Ekaterina -
How to call ejb from Forms?
Hi.
I have an existing form (version 11.1.2.0.0) and an existing ejb. Both are running on a WebLogic server version 10.3.5.0. I want to call the ejb from the form (I know that this is not recommended, but in this case it is the only sensible solution). I have tried searching the web but I have not been able to find anything about this except some broken links.
Can somebody please explain how to do this or show me some documentation or tutorial?
Regards,
Sveinung
Edited by: SvSig on Aug 7, 2012 11:52 PMLet's skip the fact that you are asking about an EJB and instead talk about what options are available to call out to any external app or component. Here are some of the options:
<blockquote>1. To make calls from the client machine to any web server (HTTP listener) you can use WEB.SHOW_DOCUMENT. This command simply passes a url to a browser. No return information is passed back into the running form.
2. To make calls from the client machine to almost any process on the client side, including the OS directly, you would need to create a java bean and integrate it into your form. Whether or not you get return information will depend on how you write the bean and to what you are calling.
3. To make calls from the server side (mid tier) part of a running form to an external application or component on the same mid tier you can use the HOST command. This executes a shell command. Although specific information cannot be returned (i.e. return values), you can get pass or fail results.
4. To call out to java applications on the mid tier you can import java code into your Forms application using the Forms Java Importer. This will give you a direct connection to the java application both in and out.</blockquote>
All of the above examples are explained in the Forms Builder online help. There are other options which are explained in the Forms Deployment Guide
<blockquote>http://docs.oracle.com/cd/E24269_01/doc.11120/e24477/toc.htm</blockquote>
Look specifically at chapters 6-8
<blockquote><li>6 Oracle Forms and JavaScript Integration
<li>7 Enhanced Java Support
<li>8 Working with Server Events</blockquote>
Summary
<blockquote><li>WEB.SHOW_DOCUMENT
<li>HOST
<li>Java Bean
<li>Imported Java</blockquote> -
How to Call EJB from coldfusion
I need to call EJB that's created in JBoss from coldfusion.
I'm getting different errors depending on how I set the home object
and provider url.
If I prefix provider url with jnp://, then I get the
following error
The connection to the remote JNDI server on host jnp at port
1099 has failed (as have all backup hosts listed, if any) - please
verify that the server is running and the NamingService is
available
If I take the jnp out and keep just the ip address and port,
then i get the following error
null (no security manager: RMI class loader disabled).
So I'm not sure what the issue is and I haven't used this
feature before.
Here's my codeI tries to call custom EJBfrom custom component received
follwong error
ERROR [STDERR] javax.naming.CommunicationException [Root exception is java.lang.ClassNotFoundException:
No ClassLoaders found for: com.mycom.myapp.action.interfaces.pm.ejb.PmFacadeRemote
(no security manager: RMI class loader disabled)]
any idea?
Thanks
YogLC -
How can I call EJB from JSP/Servlets in iWS?
Hi!!
My JSP/Servlets are on iWS, and I deploy EJB on iAS.
In this case, I don't know how JSP/Servlet call EJb on iAS.
I'd like to know how I can set JNDI name in JSP/Servlet on iWS.
I will thank you if you give me a simple example source using JSP/Servlet
and EJB.
Thanks in advance!!!
- Park-Park,
Why Are you running your JSP/Servlets in iWS instead of iAS? For whatever
reason,
look at the Converter sample from iAS. You will be doing RMI/IIOP in this
case and the sample explains in detail what to do.
hth,
-robert
"SungHyun, Park" <[email protected]> wrote in message
news:9jpfmt$[email protected]..
Hi!!
My JSP/Servlets are on iWS, and I deploy EJB on iAS.
In this case, I don't know how JSP/Servlet call EJb on iAS.
I'd like to know how I can set JNDI name in JSP/Servlet on iWS.
I will thank you if you give me a simple example source using JSP/Servlet
and EJB.
Thanks in advance!!!
- Park- -
"HowTo" Call EJB from different EAR in WLS7
Hi,
Im trying to deploy two EAR application modules, both on same WLS7.0 SP2 server
. I have several problems to give visibility between EAR applications. There is
dependences between both applications ( I will call them FirstEAR and SecondEAR)
. A FirstEAR EJB ( FirstEAREJB) uses an EJB from the SecondEAR ( SecondEAREJB
The deployment result is a "Unable to initialize method info for remote or home
interface The error is java.lang.NoClassDefFoundError: myPackage.myPackage.SECONDEAREJB"
when deploy the FirstEAREJB. I try the deployment of both using -iiop ejbc option.
Which is the way to allow my FirstEAREJB to use SECONDEAREJB?
I have try
- to set the manifest Class-Path property for FirstEAREJB with no results.
- to set the descriptor ejb-jar properties for EJBRefs with no results.
- to set the SecondEAREJB path in the weblogic start script classpath, with no
results.
- to set the SecondEAR classpath at the ejbc -cp option for FirstEAREJB ejbc
compile, with no results again.
Is there another way to allow my FirstEAREJB to use SecondEAREJB ?Take a look at this documentation on WebLogic Server Application
Classloading.
It might be helpful.
http://edocs.bea.com/wls/docs70/programming/classloading.html
/k
"Adolfo Cortés" <[email protected]> wrote in message
news:[email protected]..
>
Hi,
Im trying to deploy two EAR application modules, both on same WLS7.0 SP2server
I have several problems to give visibility between EAR applications.There is
dependences between both applications ( I will call them FirstEAR andSecondEAR)
A FirstEAR EJB ( FirstEAREJB) uses an EJB from the SecondEAR (SecondEAREJB
The deployment result is a "Unable to initialize method info for remote orhome
interface The error is java.lang.NoClassDefFoundError:myPackage.myPackage.SECONDEAREJB"
when deploy the FirstEAREJB. I try the deployment of both using -iiop ejbcoption.
>
Which is the way to allow my FirstEAREJB to use SECONDEAREJB?
I have try
- to set the manifest Class-Path property for FirstEAREJB with noresults.
- to set the descriptor ejb-jar properties for EJBRefs with no results.
- to set the SecondEAREJB path in the weblogic start script classpath,with no
results.
- to set the SecondEAR classpath at the ejbc -cp option for FirstEAREJBejbc
compile, with no results again.
Is there another way to allow my FirstEAREJB to use SecondEAREJB ? -
Call EJB from a XI Javamapping
I have developed a simple EAR which contains a CMP with local and remote interfaces. This cmp may be successfully called using the remote-interface from a client (j2se) project. Now i like to call the same CMP from within a XI JavaMapping. In the execute method i am using the following code:
InitialContext ctx;
MeraConfigurationLocal configLocal = null;
try {
ctx = new InitialContext();
Object obj = ctx.lookup("localejbs/mgb.ch/XIMera_EAR/MeraConfigurationBean");
if (trace != null)
trace.addInfo("Got object from jndi: "+obj);
MeraConfigurationLocalHome configHome = (MeraConfigurationLocalHome)obj;
if (configHome !=null) {
if (trace != null)
trace.addInfo("ConfigurationLocalHome: "+configHome);
configLocal = configHome.create();
} catch (Exception e) {
throw new StreamTransformationException(e.getMessage(), e);
int port = Integer.parseInt(
configLocal.ReadParam(MeraResourcePoolDispatcherService.CFG_GENERAL_LISTENER_PORT));
if (trace != null)
trace.addInfo("Got listenerport from localejbs/mgb.ch/XIMera_EAR/MeraConfigBean: "+port);
after calling ctx.lookup ... i got the following traceentry in xi:
<Trace level="1" type="T">*** START APPLICATION TRACE ***</Trace>
<Trace level="2" type="T">Got object from jndi: [email protected]30</Trace>
<Trace level="1" type="T">*** END APPLICATION TRACE ***</Trace>
when i try to cast this obj into a MeraConfigurationLocal the system is throwing a ClassCastExceptionHello.
Check my wiki article:
http://wiki.sdn.sap.com/wiki/display/stage/SapNetweaverProcessIntegration.CallEjb3.0methodfromJavaclassmappingPI7.1
(SapNetweaver Process Integration. Call Ejb 3.0 method from Java class mapping PI 7.1) -
I'm using OC4J 10.1.3 Standalone.
I have a requirement to initialize web services and configuration parameters during app server start up.
Accordingly,I planned to call a EJB 2.0 stateless session bean from a StartUp class.
The ejb is responsible for initializing some configurations and web services.The ejb is dependent on some other classes which are present as utility jars .
However,I cannot somehow figure out how to refer the EJB from my startup class because the EAR which contains the EJB jar is in a child loader to that containing the startup class.
Please guide me!! Please suggest if some alternative approach could be taken to suffice my requirement.
TIAAvi, I was just waiting for the "servlet hack".
I really prefer the application client way, much cleaner, no servlet container needed, and could be tested outside the container.
--olaf -
Hai Experts,
I want to call an EJB from a web dynpro not by using wrapper class or by using a Ejb.jar in WD's classpath.
The idea is to use reflection and Properties class to call an EJB . Is it possible to call an EJB as mentioned above.
Please help me to solve it.
Thanks in advance.
Regards,
R.Jude Silvester.Hi
Check this link
https://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/00bddb57-456c-2b10-cc8d-b6980d75299b
https://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/1f5f3366-0401-0010-d6b0-e85a49e93a5c
Thanks
Tulasi
Edited by: Tulasi Palnati on Feb 3, 2009 6:53 AM
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