Replacing jar files within ear

Hi
Once you package your component as an EAR and deploy it in WebLogic/Jboss is it possible to replace one or more JARs within the EAR without actualy having to recreate the EAR?
Sudhi

Yes, just use the jar update command, e.g.
jar uvf My.ear JarInEar.jar
replaces file JarInEar.jar in My.ear.

Similar Messages

Class not found in web-inf/classes folder of war file within ear file

Hi all,
          I am using Weblogic 8.1 sp4. I have a war file within an ear file. I am trying to deploy the war file with a few classes within its web-inf/classes folder, however when the classes are in that folder I consistently get a class not found exception when trying to instantiate them. If I package the classes in a jar file and then put that jar file within the web-inf/lib folder of the war, the classes are also not found.
          If I put these two classes in the app-inf/classes folder of the ear file, everything works as expected and the classes are found.
          Any ideas of why this is happening. This seems to be a very simple thing that should work, but appears to not be working at all.
          thanks in advance for any suggestions or ideas.

Hi,
          This is a known limitation/issue with WL. There is also no way around this.
          Regards,
          LG

How many Ways jar files from ear file on a jboss can be downloaded on clien

Aoa
How many Ways jar files from ear file on a jboss can be downloaded on client side
like jnlp etc..
Regards
M Fazal Ur Rehman

First, you need to be able to boot from the Recovery HD:
Boot Using Command+R keys:
1. Restart the computer.
2. Immediately after the chime press and hold down the
"COMMAND" and the "R" keys together.
3. Release the keys when the Utilities Menu appears.
Once at the Utilities Menu select Terminal from the Utilities menu in the screen's menubar. Now, you need to know where these new files are located. You move to any location using the 'cd' command such as cd /Users/user_name/Documents, then press RETURN. Replace user_name with your actual username. Next you need to do a directory listing to see if your files are in that location, Documents. Use ls -al to do a directory listing of the files and folders in Documents. If you find your new files there, then connect an external drive or flash drive. You will need to know the name you have assigned to this drive. It needs to be already formatted. Copy your files using cp /Documents/filename /Volumes/volname/filename. Replace volname and filename with those that apply. Press RETURN.
Or take it to your local Apple Store and see if they can do the chore for you.

Using External JAR file within Web Dynpro DC

Hi,
I have created a Web Dynpro DC and I need to use an external JAR file.
I want to use this external JAR file within the same Web Dynpro DC and NOT creating another DC to house the external JAR file as I can see from the blog.
I have included the external JAR file in the "lib" folder of the Web Dynpro DC.
When I tried to perform a DC build, it keeps complaining error....
How should I solve this problem...
Thanks.
mike

Hi Mike,
Go through the below which might help you.
Re: Lookup of RFC Destinations
Re: Import a Java Bean from a different DC
Web Dynpro References
Re: j2ee library with webdynpro
Re: Web Services :HTTP Destination not getting resloved.
http://help.sap.com/saphelp_nw70/helpdata/en/46/3ce3e4df201d63e10000000a11466f/frameset.htm
Thanks n Regards,
Jhansi Miryala

Replacing JAR files loaded by custom ClassLoader

Hi all,
I am trying to create an auto-updater for a stand alone application, which can look for new versions of relevant jar files on the internet and download them. I have code which will look for newly downloaded versions and can replace the old jar file with the new one (using simple File methods). This works fine for when the application is started initially, but as the application is a server and may not manually be started for a long time, I am trying to force the server to restart and reload with the new code.
if(newCode.exists()) {
     System.out.println("new code!");
     if(oldCode.exists()) {
          oldCode.delete();
     if(code.exists()) {
          if(! code.renameTo(oldCode)) {
                    throw new IOException("Error backing up code file");
     if(! newCode.renameTo(code)) {
          throw new IOException("Error installing new code file");
}I have looked around the forums a bit, and have come up with using a ClassLoader based on URLClassLoader:
class ProxyLoader extends URLClassLoader
     public ProxyLoader(String jarFile) throws MalformedURLException {
          super(new URL[] { (new File(jarFile)).toURL() });
     public Class findClass(String name) throws ClassNotFoundException {
          System.out.println("Finding: " + name);
          return super.findClass(name);
}This seems to work OK, as all the classes from the jar file are loaded by this classloader.
I have a method which can create an instance of the class loader, and load the server application.
private boolean startProxy(int port) {
     try {
          pl = new ProxyLoader("proxy.jar");
          Class ptClass = pl.loadClass("proxy.POPThread");
          pt = ptClass.newInstance();
          Method ptStart = ptClass.getMethod("start", new Class[0]);
          ptStart.invoke(pt, new Object[0]);
          return true;
     } catch(Exception e) {
          return false;
}I also have a method to shut down the server:
private boolean stopProxy() {
     try {
          Class ptClass = pl.loadClass("proxy.POPThread");
          Method ptInterrupt = ptClass.getMethod("interrupt", new Class[0]);
          ptInterrupt.invoke(pt, new Object[0]);
          return true;
     } catch(Exception e) {
          return false;
}These appear to be working fine, the problem I have however is when I try to rename the existing jar file (proxy.jar) in order to replace it with a new one (proxy.new), the renameTo method on the File object fails. I am guessing that is because the proxy.jar file is still in use by the JVM. I have tried setting the classloader var to null, but this doesnt seem to have any effect.
My main question is how can I 'free' the jar file so that it can be replaced with new code? Is it possible? My only otherway of working around this is to have a variable stored in a file pointing at the 'current' code, but the jar file isn't litterally replaced.
This is a standalone application, which will probably run in a startup script on a server, so webstart isn't really an option.
TIA
iklesteve

I have found this to be true anytime I try to use the renameTo() API to rename a file with a .jar file extension (regardless of the actual file type - i.e. it could be a text file with .jar appended and it will still fail) in the case where the class making the renameTo() call is loaded from another .jar file.
I run the same exact code after extracting from the .jar, then the rename to the other .jar file is successful. Also, if I rename the .jar file to a ".ja" file, I can successfully rename the jar file even if the code is running with the context of another .jar file.
Is this some kind of bogus security measure within the JVM or is it a bug?

Replacing jar files real-time in classpath

Hi All
I have a swing application and It runs perfectly. I have created a update manager that can download jar files for the application. This update manager downloads jar files and replaces the jar files that are currently in the class path. You could say the update is real-time.
After the files are downloaded I get errors like class not found and other really strange Java errors. The class not found errors indicate that the application cant find classes that are in the downloaded jar file.
Is there any way to prevent this from happening?
Thanks in advance,
Martyn Hiemstra

I am currently just saving the downloaded files into the classpath directory, so in short I'm replacing them while the JVM is running.
The problem is that my Java application is installed using install4j meaning that the application is started as a .exe file. The problem is that I would need to create an external application to update the files but the external programme would have not idea where to put the newly downloaded files. T o overcome this all I want to create an updater within my own application.
Is there a way to shutdown real-time loading of jar files in the class path? That would solve the problem since the newly loaded jar files arent detected until the application is started again.

How to access a jar file in EAR file?

I have a EAR file which contains EJB.jar file and util.jar file. Outside of EAR, I mean in client side, I need to reference util.jar file. How can I access it?
EAR structure is
|--+META-INF/
|--|---application.xml
|--|---manifest.mf
|--EJB.jar
|--|---+MEAT-INF/
|--|---|--- deployment descriptors...
|--|---|--- manifest.mf
|--|--- EJB classes
|--Util.jar
Util.jar must be executed in server side. If I just add Util.jar in client program's classpath, when client program is executed, serverside Util.jar is executed? Or what else I should do in the client program to reference server-side Util.jar?

Excellent question. I don't see any client-jar in your EAR file structure. So I am assuming you are writing a separate client application which will talk to the ejbs deployed as part of this EAR. You need to do the following:
Write another EAR file with the following structure:
ear:
META-INF/application.xml
util.jar
client.jar
client.jar should have a META-INF/MANIFEST.MF and that should contain Class-Path:util.jar and value for Main-Class attribute.
Now deploy this new ear to your application server and execute it using Application Client Container that comes with your app server.
If you don't want to write another EAR file, then bundle th client.jar in your original EAR file.
Points to note are:
you have to repackage util.jar again inside this ear file.
For portability reason, you should use Class-Path manifest entry in client.jar. Refer to http://java.sun.com/j2ee/verified/packaging.html and J2EE platform spec section #8.2.
Hope this helps,
Sahoo

[noob] how to include third part jar file in ear

Hi,
eveything is in the subject. It's quartz that I'm using btw.
Regards
Fred

Hello,
You are using the internal deployment file?
<yourapp>.deploy?
1) Place the file in the WEB-INF/lib directory
2) Right click <yourapp>.deploy file and select properties
3) File Groups -> WEB-INF/Lib -> Contributers and select your jar file.
4) Rebuild the ear, done
-Anton
PS Be carefull, depending on the Application server you are using the quartz library COULD already be present (Most have it) and this could be a different version!
If this is the case you need to tell the application server to load classes from the web-inf directory first!
With the Oracle OC4J containers this can be done during deployment, classloaders and select search local classes first.
With Weblogic you will need the deployment descriptor 'weblogic.xml' and add:
<container-description>
<prefer-web-inf-classes>true</prefer-web-inf-classes>
</container-description>

Accessing a Jar file within my jar...

Hi,
I've got a JDBC Jar file that I wish to include in my Jar package, but I'm unsure how to do this...
I'm using ant to compile my code & package it up into the Jar, & I can get it to compile fine, and package everything up fine (including the JDBC jar), but when I go to run the app I get an error
(No suitable driver).
My app works fine without being Jar'ed up.
I'm guessing that I need to set the classpath to reference the JDBC jar file in my jar... but I'm unsure how to do this.
Any help would be greatly appreciated.

package what you thirdpart jar file and your jar file to one jar file..
it will run ok.
maybe the below tool can help you.
a tool named JavaJar(written by java) can compress and decompress jar,war, ear and.zip...
may download from http://www.qwerks.com/download/4114/JavaJar.zip
the tool is very verygood tool.
but the homepage(www.pivotonic.com) of JavaJar cannot be accessed.
it is funny.
good lucky.

Unable to resolve setting of dependent jar file in ear

Hi,
I have an .ear file which as an ejb.jar and dependent.jar file. Now i set the classpath in MANIFEST.MF of ejb.jar and tried to deploy in weblogic server7.0 but my ejb is not able to identity my dependent.jar its throwing class not found error. I even tried setting up classpath even @ my MANIFEST.MF of ear also. still not able to resolve.
So let me know does dependent.jar in ear is suppoted are not?

Hello Sanjay,
This should work without any problems. Can you provide your manifest.mf file?
Meanwhile, refer to the following link for more documentation about WebLogic classloading
and how to specify a manifest.mf file to do what you're trying to achieve:
http://edocs.bea.com/wls/docs70/programming/classloading.html#1073491
Best regards,
Ryan LeCompte
[email protected]
http://www.louisiana.edu/~rml7669
Sanjay <[email protected]> wrote:
Hi,
I have an .ear file which as an ejb.jar and dependent.jar file. Now
i set the classpath in MANIFEST.MF of ejb.jar and tried to deploy in
weblogic server7.0 but my ejb is not able to identity my dependent.jar
its throwing class not found error. I even tried setting up classpath
even @ my MANIFEST.MF of ear also. still not able to resolve.
So let me know does dependent.jar in ear is suppoted are not?

WAR Can't find class in JAR file in EAR/lib

Hi,
I have 1 EAR file with 1 WAR and 1 EJB-JAR file. Our main business-code is in a JAR-file which is placed in the EAR/lib/ folder along with the rest of the shared JAR-files.
When i deploy the EAR the EJB gets deployed fine but when the WAR gets deployed, we get a ClassNotFoundException. We configured a class as a ServletContextListener (Which is part of the jar) in the web.xml so at startup it should perform some initiation. But since it can;t be found....
I've tried changing the Mainfest.mf to include a CLASSPATH attribute with ./lib/x.jar but it stil the same problem. The only thing that solves it is to put it in the WEB-INF/lib folder.
What am i doing wrong?
Thanks,
Maarten

Here it is
<?xml version="1.0"?>
<!DOCTYPE application PUBLIC '-//Sun Microsystems, Inc.//DTD J2EE Application 1.3//EN' 'http://java.sun.com/dtd/application_1_3.dtd'>
<application>
     <display-name>spg-online</display-name>
     <module>
          <web>
               <web-uri>appname.war</web-uri>
               <context-root>appname</context-root>
          </web>
     </module>
     
</application>
My app follows the basic structure of an EAR-file:
EAR
META-INF
application.xml
lib
appname.jar
a.jar
spring.jar
appname.war
appname-ejb.jar
The meta-inf of the war-file looks like this:
Manifest-Version: 1.0
Ant-Version: Apache Ant 1.6.5
Created-By: 1.4.2_08-b03 (Sun Microsystems Inc.)
Class-path: ./lib/appname.jar ./spring.jar
I let ANT generate the Class-path:
<jar jarfile="${dist.home}/${component.name}.war">
<fileset dir="${build.home.webroot}" />

<manifest>
<attribute name="Class-Path" value="${lib.project.manifest.classpath}"/>
</manifest>
</jar>

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

How to include an external jar file in .EAR project

Hello All,
I have created a web service through java class in sap netweaver 7.1.
For database connection i want to add external jar file as reference. could you all please tell me how to do this or can i get some scenario where it is explained.
Please Help
Regards,
Vanita Jain

Hi Vanita,
open your project in nwds > right click on the project > click on properties option from the menu > click on java build path from the left-side navigation of the window > and click on libraries in the right side tab > here you'll get a button called add external jars > clicking to this, will open browser window to select a jar file.
Regards,
Sen

OAS 10.1.3 isn't detecting /WEB-INF/lib jar files within WAR file

Hello,
I have been developing and testing a simple non-EJB web application on Tomcat 5.5 with no class loading difficulties for the past several months. All of the needed JARs for my app are located under the WEB-INF/lib directory. My next task is to deploy the WAR file containing my webapp on the Oracle 10g (10.1.3) application server.
The problem I am having when trying to do this is that when I deploy the WAR file from Oracle Enterprise Manager, the WAR file will expand correctly but at runtime OAS doesn't appear to be detecting the JAR files in the WEB-INF/lib folder of my WAR file. I have confirmed that the JAR files are indeed being expanded in the directory that OC4J expands the WAR file into:
appserver/j2ee/home/applications/appEARFile/MyWebApp/WEB-INF/lib.
But when I run the application, from the Firefox browser I immediately get the following 500 Internal Server Error:
"Servlet error: Error instantiating servlet 'reports'. Servlet class org.springframework.web.servlet.DispatcherServlet not found in web-application MyWebApp"
(The IE browser just gives me the 500 error without additional elaboration.)
But my spring.jar where that class is located is in the WEB-INF/lib directory. Does anyone have an idea what the solution is--how can I get OC4J to read the spring.jar (or any jar) in that lib folder? (Or is there a way I can configure logging to better pinpoint the problem if that isn't it?)
Thanks,
Glen

Glen,
You said:
IE browser just gives me the 500 error without
additional elaborationTry unsetting the "Show friendly HTTP error
messages".
From the "Tools" menu of Microsoft Internet Explorer,
choose "Internet Options".
(You should then see another window entitled
"Internet Properties" displayed.)
Select the "Advanced" tab and search for "Show
friendly HTTP error messages".
Excellent--that worked. Thanks! I was afraid that I would have to be debugging on Firefox exclusively.
I also suggest setting the
"search-local-classes-first" attribute, of the
"web-app-class-loader" element, in your
"orion-web.xml" file to 'true' (if it isn't
already).
That did it. My orion-web.xml file was of the old DTD-based version, I believe that was causing the problem.
The following document:
Oracle® Containers for J2EE
Developers Guide
10g Release 3 (10.1.3)
Part No. B14433-01
has a chapter (3) entitled Utilizing the OC4J
Class Loading Framework which contains a section
entitled Troubleshooting Class Loading-Related
Problems in OC4J.
Thanks for the link, I went through it thoroughly in trying to fix my problem.
Glen

Packaging - putting support files within ear file

We have a J2EE application that leverages some xml control files. We would like to package the application with these support files all within the ear file. Currently, these files get moved seperate from the ear, which causes files to be missed sometimes during deployment. Our questions are as follows:
1) Can these files be placed in the ear file?
2) How do we reference them? Currently the application works by specifying the path to these files in the web.xml, what is the path we should use so that our application can find the files?

"Brandon Witte" <[email protected]> skrev i en meddelelse
news:[email protected]..
We have a J2EE application that leverages some xml control files. Wewould like to package the application with these support files all within
the ear file. Currently, these files get moved seperate from the ear, which
causes files to be missed sometimes during deployment. Our questions are as
follows:
>
1) Can these files be placed in the ear file?
2) How do we reference them? Currently the application works byspecifying the path to these files in the web.xml, what is the path we
should use so that our application can find the files?
The simplest solution would be to put them in the WEB-INF/classes or
APP-INF/classes directories and load them through the classloader.

Replacing jar files within ear

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