Including utility jar when packing ejb in weblogic

Hi,
I am new to j2ee programming. I have an ejb which uses some utility jars. I followed the bea documents to structure the directory. The directory structure is, like,
EjbProject
- classes
--com
---mine
----projectTracking --> has the class files of the ejb and supporting java files
- src
--com
---mine
----projectTracking --> contains the source files of the ejb and the supporting java files
META-INF > contains ejb-jar.xml and weblogic-ejb-jar.xml
The source java files are dependent on an utility jar file.
so when I try the java weblogic.appc src, it throws me exception saying the utility file is missing. My question , is where should I put this utility jar file. Please send me your thoughts.
Thanks in advance

Hi,
you can put your utility jar in the ear file along with the EJBs and make a classpath entry to these files in the EJB jar's META-INF\Manifest.mf file. As you said if you are working with weblogic you can put these files any where in the directory structure and place the entry in the startWeblogic.cmd file. But i recomend first option.
Ashok.

Similar Messages

Where to put utility jar (used by EJB's and war)

Hello all,
In many cases when you create a web application including EJB's and a WAR file packaged together in an EAR file, you need some utility classes that are used in the EJB's as wel as in the servlets in the WAR. The utility classes might for example be value object classes that servlets use to exchange data with te EJB's.
My question is: What is the best place to put the utility class files?
There is a new article on JDC: http://developer.java.sun.com/developer/technicalArticles/J2EE/build/ that gives some tips. For example, it proposes to put the utility JAR in the EAR file and then add a "Class-Path:" entry to the MANIFEST.MF of the EJB's that use the utility classes.
However, this approach does not work on BEA Weblogic 6.0. Weblogic's classloader just seems to ignore the "Class-Path:" in the EJB JAR's manifest.
Any thoughts?
regards
Jesper

The "CLASS-PATH" mechanism in that article is a new
requirement in J2EE 1.3 (final draft 4). Therefore
right now Weblogic does not support it yet. Now you
need to put those utility classes in both the WAR (in
WEB-INF/lib) and EJB JAR files. If you really want
only 1 copy of the jar file deployed, you can manually
add that jar file to weblogic server classpath in the
start script under config/yourdomain.HI all,
I have some Utility jar file for EJB and Web Application,
In the second solution about one copy in weblogic,
I tried it in the WLS60 it's ok
But it didn't work in WLS61
Anyone could give me any good suggestion?
Moen

Using external util JAR from Session EJB

I have a Stateless Session EJB that uses some classes packaged in a utility jar. How do I package the EJB jar with this util jar, and get the app server to recognize this utility jar? including a /lib dir with the utils jar in it, like you would with a WAR, doesn't work.
I've temporarily got this to work by modifying the startup scripts for my app server to ensure my jar is included in the -classpath arg, but this cannot be the intended way. (cannot find details on this in the tutorial).
Thanks in advance!

Well, the answer depends a lot on which appserver you're using, because it obviously depends on how the vendor implemented the containers' ClassLoaders. What usually works is dependent upon a portion of the JVM spec regarding the MANIFEST.MF file. If you package your ejb.jar and library.jar in an .ear file, you can put the following in the ejb.jar MANIFEST.MF:
ClassPath: library.jarNote that there must be at least one blank line at the end of the MANIFEST.MF file.
This works on WebLogic, but, as an example, JBoss uses a single ClassLoader, so I'm not entirely sure how you'd go about the same thing there.
And you're quite right - putting it in the JVM ClassPath is not a good idea...

How to include other jars when using servicegen

I have been trying to use servicegen with regular java classes but I can't figure
out how to include other jars that the webservice class uses?
How is this supposed to be done?

SQL> set null <<NULL>>
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2 /
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How to declare worker manager when using ejb-gen (weblogic 9.x)

I want to declare a local worker manager for one of my application.
My ejb-jar.xml file is generated with ejbgen, and I can't find anything related to worker manager declaration in ejbgen documentation
Is it possible to achieve this configuration requirement ?
Thanks.

Hi,
Create a WorkManager from AdminConsole with name *"MyWorkManager"*. then add the following Annotation in your EJBGen Ejb.
Try the Annotation Like this:
import weblogic.ejbgen.Session;
@Session( <font color=red><b>dispatchPolicy = "MyWorkManager"</b></font>, ejbName = "TestSB")
Thanks
Jay SenSharma
http://jaysensharma.wordpress.com (WebLogic Wonders Are Here)

Including other JARs when packaging

Hello,
I have read the SUN tutorial on how to package my application, which I was able to do and execute fine. The problem is, in my application I use several database connection jar files, such as mysql-connector-java-5.0.4-bin.jar (MySQL) and jt400.jar (AS/400). When I try to do something in my application that uses one of these jar files, such as when I try to log in (uses a MySQL connection), I receive the following error:
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
My application works fine if its not packaged, but when it is, I receive this error. I tried putting the jar files in the package folder, but that did not help. I tried setting my classpath to those files in the package folder, that as well did nothing.
Could anyone help, or point me in the right direction?
Thank you.

But... it still requires me to extract the lib folder
out of the jar, and keep it in the same directory as
my main jar for it to read. I just want to be able
to double click on it and have it launch, without
needing to extract anything..That's the idea. You don't need to extract anything if you distribute your entire directory rather than trying to pack those other JAR files into your JAR file. The idea is that they're separate and your JAR file is linked to them. With your command
jar ... lib/*.jar
You're actually adding the JAR files to yours, rather than leaving them outside of it and just bundling everything up and distributing it. There's good reason to leave those JAR files separate. For example, when your MySQL driver gets updated you can distribute that single JAR file as an update (and perhaps your own if your code changed) rather than having to bundle everything up again and distribute the entire thing.

EAR Packaging with utility jars

In my application , the EJB's as well as servlets user log4j.jar ( logging
utility). I have included the log4j.jar in
WEB-INF/classes folder of the war file. Do I have to include the log4j.jar
in the ejb-jar file also ? Do I have
to explode the log4j.jar in the ejb-jar file or simply including the
log4j.jar in the ejb-jar will suffice.
BTW , I am using Weblogic 6.0 SP2 .

Support for bundled extensions is mandated by the J2EE spec (since 1.2 I think) :
"The J2EE platform supports the use of bundled extensions as specified in
Support for Extensions and Applications in Version 1.2 of the Java Platform
(available at http://java.sun.com/products/jdk/1.2/docs/guide/
extensions/spec.html)."
Ramu <[email protected]> wrote:
hi Dimitri,
Could you please throw more light on Class-Path of the ejb jar manifest? OR
just point me to the related documentation.
thanks,
-ramu
"Dimitri Rakitine" <[email protected]> wrote in message
news:[email protected]..
Since EJB classloader is a parent of WAR classloader, you can include the
log4j.jar in the Class-Path: of the ejb jar manifest.
See
http://www.onjava.com/pub/a/onjava/2001/06/26/ejb.html and
http://www.onjava.com/pub/a/onjava/2001/07/25/ejb.html
Manish Parikh <[email protected]> wrote:
In my application , the EJB's as well as servlets user log4j.jar
logging
utility). I have included the log4j.jar in
WEB-INF/classes folder of the war file. Do I have to include thelog4j.jar
in the ejb-jar file also ? Do I have
to explode the log4j.jar in the ejb-jar file or simply including the
log4j.jar in the ejb-jar will suffice.
BTW , I am using Weblogic 6.0 SP2 .--
Dimitri
Dimitri

J2EE / JMS Controlling transaction in util.jar

Hi all experts!
I've a delicate problem where I want to handle transactions transparently for EJBs in my util jar. I�m familiar with the other alternatives (MDBs etc) and using them in other parts of the solution but they can�t be used here (need a synchronous request-reply).
The description is a bit long but please bare with me, hopefully it is clear and understandable.
Summary:
Why can't I use a UserTransaction in a utility.jar when called from a EJB using container managed transaction.
Senario:
transport_util.jar:
Transport utility package contains no EJBs, just simple java classes (to make usage / deployment more simple for the users of the util.jar).
The EJBs use an ApplicationFacade in the transport_util.jar (not a EJB just a java class) providing a high level communication API for JMS transport, encapsuling JMS specific code, and providing the simple transport primitives:
- void send(Object data) : writing fire and forget messages to JMS Queue
- Object requestReply(Object data) : sending a request message and waiting
synchronously for a reply message. Not pretty when using messaging but
necessary in this solution.
AnyEJB.jar:
The �client� using the transport primitives in transport_util.jar. The transport_util.jar is included in the EAR application as a utility.jar. The EJBs can use either Container (CMT) or Bean Managed Transactions (BMT). The transport_util.jar shouldn�t set any limitations.
Problem:
The problem arise when a �client� EJB under CMT calls the requestReply function in the API. The message is written to the JMS Queue by the transport_util before it starts to listen for a reply, on a in Queue, which will be returned to the caller. The request message is nerver delivered to the recipient who there for won�t produce a reply.
Why? Because it is written to the JMS Queue inside a transaction (implicit from the calling EJB) which has not been committed (and shouldn�t from the clients perspective) before the API starts to listen for the reply. No delivery until commit! The transactional parameter isn�t valid when inside a application server
My idea of a solution:
Start a new UserTransaction, putTx, inside the requestReply function to halt the callers transaction (J2EE doesn�t support nested trans) and use it around the put operation. After a successful put the putTx could be committed, without affecting the callers transaction, which would lead to the message being sent to the recipient and finally a reply could arrive. Only one big problem.:
I get a naming exception when trying to lookup the UserTransaction through JNDI if the calling EJB use CMT but not if it uses BMT. Why? Is there a workaround?
InitialContext ctxt = new InitialContext();
UserTransaction putTx = ctxt.lookup(�java:comp/UserTransaction�)
putTx.begin();
// Put message on queue
putTx.commit();
// Try read reply from queue
Infrastructure:
- IBM WebSpehere Application Server 5
- IBM WebSpehere MQ 5.3
- Java 1.3
Exception excerpt:
Error occurred while handling transaction
[2003-09-04 17:06:47:479 CEST] 7f8389dc SystemOut O javax.naming.NameNotFoundException: Name "comp/UserTransaction" not found in context "java:".
[2003-09-04 17:06:47:479 CEST] 7f8389dc SystemOut O      at com.ibm.ws.naming.ipbase.NameSpace.lookup(NameSpace.java:1003)
[2003-09-04 17:06:47:479 CEST] 7f8389dc SystemOut O      at com.ibm.ws.naming.urlbase.UrlContext.lookup(UrlContext.java:1211)
[2003-09-04 17:06:47:479 CEST] 7f8389dc SystemOut O      at com.ibm.ws.naming.urlbase.UrlContext.lookup(UrlContext.java:1203)
[2003-09-04 17:06:47:479 CEST] 7f8389dc SystemOut O      at com.ibm.ws.naming.urlbase.UrlContext.lookup(UrlContext.java:1257)
[2003-09-04 17:06:47:479 CEST] 7f8389dc SystemOut O      at javax.naming.InitialContext.lookup(InitialContext.java:359)
/Best regards
Jesper

If anyone else have the same problem....
After a great tip from a colleague a good solution if found!
By getting hold of the TransactionManger from the ApplicationServer it is possible to suspend an ongoing transaction, start a new one and commit it and restart the suspended transaction again.
Looking up the TransactionManger differs a lot from AppServer to AppServer. To find out how it is done on yours take a peak in the code of any of bigger persistence frameworks (I looked at Hibernate).
So in pseudo code:
// Error checks not in code to keep it short
// Look up the TransactionManager
TransactionManager mgrTx = //
// Suspend callers Tx
Transaction callerTx = mgrTx.suspend();
// Start new transaction for the work to be performed
// outside the callers transaction
mgrTx.begin();
// Perform transacted work .....
// Commit
mgrTx.commit();
// Reassign the callers transaction to the thread and activate if
mgrTx.resume(callerTx);/J

How to deploy a simple .jar (containing Helper classes) in Weblogic?

Hi,
I have created multiple .jar files.
1) MDB.jar containing all my MDB classes.
2) Bean.jar containing all my Session Bean classes.
3) Utility.jar containing remaining Helper,utility classes.
I had deployed MDB.jar, Bean.jar by using Weblogic Console, under 'Deployments'-> 'EJB Module'. How can i deploy Utility.jar ? First of all, do i need to deploy Utility.jar? Only EJB JARs need to be deployed?
If we do not deploy a non-EJB JARs, how this code will be available and is executed?
Thanks in advance.

I'd recommend you deploy these 3 components together in an EAR file. THe utility jar file could go in APP-INF/lib, or you could reference it via manifest class-path entries.
-- Rob
WLS Blog http://dev2dev.bea.com/blog/rwoollen/

Weblogic 10.3.0 Deployment error when using ejb-jar.xml

Hi,
I am getting the following error while deploying my EJB3 application on Weblogic 10.3.0. This is happening only if I include ejb-jar.xml.
As per the EJB3 descriptor spec, Remote Home or Local home are not exists.
Is this a issue in Weblogic 10.3.0 or am I missing any special setup ?
Please help.
weblogic.application.ModuleException: Exception preparing module: EJBModule(egm-poc.jar)
Unable to deploy EJB: C:\appsrv\domains\WeblogicRS1.1-domain\servers\admin\tmp\_WL_user\_appsdir_egmear_ear\ot2591\egm-poc.
jar from egm-poc.jar:
In EJB JPATestBean, both the remote home and remote component interface must be specified. Currently, only one of them is spec
ified.
at weblogic.ejb.container.deployer.EJBModule.prepare(EJBModule.java:452)
at weblogic.application.internal.flow.ModuleListenerInvoker.prepare(ModuleListenerInvoker.java:93)
at weblogic.application.internal.flow.DeploymentCallbackFlow$1.next(DeploymentCallbackFlow.java:387)
at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:37)
at weblogic.application.internal.flow.DeploymentCallbackFlow.prepare(DeploymentCallbackFlow.java:58)
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- <ejb-jar version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/ejb-jar_3_0.xsd">
<description>JPA Test Application</description>
<display-name>JPATest</display-name>
- <enterprise-beans>
- <session>
<ejb-name>JPATestBean</ejb-name>
<remote>egm.poc.jpa.JPATestBeanRemote</remote>
<local>egm.poc.jpa.JPATestBeanLocal</local>
<ejb-class>egm.poc.jpa.JPATestBean</ejb-class>
<session-type>Stateless</session-type>
<transaction-type>Container</transaction-type>
</session>
- <session>
<ejb-name>AuditInfoDAOH</ejb-name>
<local>egm.poc.jpa.Audit</local>
<ejb-class>egm.poc.jpa.AuditInfoDAOH</ejb-class>
<session-type>Stateless</session-type>
<transaction-type>Container</transaction-type>
</session>
</enterprise-beans>
- <assembly-descriptor>
- <container-transaction>
- <method>
<ejb-name>JPATestBean</ejb-name>
<method-name>*</method-name>
</method>
<trans-attribute>RequiresNew</trans-attribute>
</container-transaction>
- <container-transaction>
- <method>
<ejb-name>AuditInfoDAOH</ejb-name>
<method-name>*</method-name>
</method>
<trans-attribute>Required</trans-attribute>
</container-transaction>
</assembly-descriptor>
</ejb-jar>
Regards
Saji

Hi,
Seems the issue is not common. Can anyone throw some light on this ?
Regards
Saji

Web page breaks when adding utility JARs to my EAR

Hi All,
I am creating a Web Application (.war) that runs some java code and has some JSP web pages to control the code/display results (as a dashboard sort of thing). I have then put this .war file in an enterprise app (.ear file - I have done this as there is other functionality that I want to roll in to the application).
I have been building this in Rational Software Architect and imported the required utility .jar files into the .war project, however when this is built the utility .jars are not included in the exported .ear file (the jsp dashboard pages still display correctly - it just means that the java code cant be run).
To ensure that the utility jar files are included in the exported .ear file I the added the utility jars in to the main .ear project and referenced them from the web app project - this compiles fine - however, when i then view the jsp pages they are now showing blank!
Any ideas as to what might be the problem or why my jsp pages are not showing up once I have added the dependent utility jars in to the ear file?
Thanks in advance guys!

Don't use layers, use tables. Outlook doesn't render with the
Internet Explorer engine (since Outlook 2007 at least). You also
can't use padding, background images, external CSS styles, and
dozens of other things. You also need to provide a full path to the
images in the newsletter.
In short, it's NOTHING like designing for a browser.
Here's a giant PDF that will make you cringe:
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Here's a rough guide to HTML email:
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Weblogic-cmp-jar.xml and EJB 1.1

I am working on migrating a number of components from JBoss to WebLogic 10. Some of these components are using EJB 1.1. I want to do the migration without having to updated to EJB 2.0 or EJB 3.0.
I have looked at the documentation for WebLogic 10 and understand that you need to use weblogic-cmp-jar.xml when using EJB 1.1. The problem is that I can not find an example of the weblogic-cmp-jar.xml. The documentation doesn't appear to fully document what the xml needs to look like.
Would someone be able to provide me with a simple example of the weblogic-cmp-jar.xml for use with EJB 1.1?
Thanks

You can reference the edoc at:
http://e-docs.bea.com/wls/docs100/ejb/DDreference-cmp-jar.html
http://e-docs.bea.com/wls/docs100/ejb/ejb11.html

WL tries to deploy utility jar file in .ear as an EJB

I have an ear containing two ejb jars, one webapp war and a utility jar
(common.jar). Deploying to
WebLogic 6.1 sp2 results in deployment errors because WebLogic thinks
the common.jar in a
lib directory in the ear is an ejb jar:
==================================================================
><Apr 22, 2002 4:42:36 PM MDT> <Error> <J2EE> <Error deploying
>application lib/common:
>
>Unable to deploy EJB: lib/common.jar from lib/common.jar:
>
>An error occurred while reading the deployment descriptor. The error was:
> java.io.FileNotFoundException: META-INF/ejb-jar.xml not found in jar file
> at weblogic.ejb20.dd.xml.DDUtils.getEntry(DDUtils.java:332)
> at weblogic.ejb20.dd.xml.DDUtils.getEjbJarXml(DDUtils.java:236)
>.........
>===================================================================
Why does it think common.jar contains an EJB? My application.xml is:
>
><application>
> <display-name>TestUnit</display-name>
> <module>
> <ejb>TestUnit1.jar</ejb>
> </module>
> <module>
> <ejb>TestUnit2.jar</ejb>
> </module>
> <module>
> <web>
> <web-uri>WebApp1.war</web-uri>
> <context-root>WebApp1</context-root>
> </web>
> </module>
></application>

Hi.
Please open a case with support.
Regards,
Michael
Rick Holland wrote:
I have an ear containing two ejb jars, one webapp war and a utility jar
(common.jar). Deploying to
WebLogic 6.1 sp2 results in deployment errors because WebLogic thinks
the common.jar in a
lib directory in the ear is an ejb jar:
==================================================================
<Apr 22, 2002 4:42:36 PM MDT> <Error> <J2EE> <Error deploying
application lib/common:
Unable to deploy EJB: lib/common.jar from lib/common.jar:
An error occurred while reading the deployment descriptor. The error was:
java.io.FileNotFoundException: META-INF/ejb-jar.xml not found in jar file
at weblogic.ejb20.dd.xml.DDUtils.getEntry(DDUtils.java:332)
at weblogic.ejb20.dd.xml.DDUtils.getEjbJarXml(DDUtils.java:236)
===================================================================Why does it think common.jar contains an EJB? My application.xml is:
<application>
<display-name>TestUnit</display-name>
<module>
<ejb>TestUnit1.jar</ejb>
</module>
<module>
<ejb>TestUnit2.jar</ejb>
</module>
<module>
<web>
<web-uri>WebApp1.war</web-uri>
<context-root>WebApp1</context-root>
</web>
</module>
</application>
Michael Young
Developer Relations Engineer
BEA Support

Ejb-jar.xml中的EJB QL和weblogic-cmp-rdbms-jar.xml中的WLQL

我想问一下，在ejb-jar.xml文件中用EJB QL查询语言定义了相应的EJB QL查询语句后，在weblogic-cmp-rdbms-jar.xml文件中还需不需要用wlql语言来定义相应的查询语句呀？

在Weblogic6.0中，如果你需要利用EJB2.0的EJBQL语言所不提供的
ORDERBY排序功能，那么这时候可以在weblogic-cmp-rdbms-jar.xml中用WLQL覆盖它，一般情况下，在ejb-jar.xml中声明一个EJBQL方法就可以了，WLQL可有可无。

Ejb jar - packaging utility jars or classes?

Currently I have an ejb jar that contains 1 bean (say ejb1.jar). This bean uses some utility classes (say util.jar). If I add the actuall .class files from util.jar to ejb1.jar everything works great. If I add util.jar to ejb1.jar I get errors like:
Unable to deploy EJB: SomeBean from ejb1.jar.jar:
java.lang.NoClassDefFoundError: com/xxxx/xxxx/SomeClass
Shouldn't adding the util.jar file directly to the ejb1.jar file work? Do I have to do anything extra to get it to work?
thanks,
ryan

http://edocs.bea.com/wls/docs70/programming/classloading.html#1069420
"Ryan Van Luttikhuisen" <[email protected]> wrote in message
news:[email protected]..
Currently I have an ejb jar that contains 1 bean (say ejb1.jar). Thisbean uses some utility classes (say util.jar). If I add the actuall .class
files from util.jar to ejb1.jar everything works great. If I add util.jar
to ejb1.jar I get errors like:
>
Unable to deploy EJB: SomeBean from ejb1.jar.jar:
java.lang.NoClassDefFoundError: com/xxxx/xxxx/SomeClass
Shouldn't adding the util.jar file directly to the ejb1.jar file work? DoI have to do anything extra to get it to work?
>
thanks,
ryan--
Dimitri

Including utility jar when packing ejb in weblogic

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