Applets and 3rd party jars
Hi,
I'm trying to use a 3rd party jar with an applet. I can access the functions just fine when using an applet viewer, but when I try deploying the applet from a web page I get classNotFound exceptions. How do I go about getting the applet to recognize the jar file?
Thanks
Eva, yes, if that class in one of the 3rd party jars wants to access your class directly, then it is necessary that your class is loaded by the same classloader that loads that 3rd party jar or even higher up the classloader hierarchy.
Why do you consider putting your class library into applib "a bit rude"? As long as your classes are named distinctively so that they will not clash with other classes, it is not a problem.
On the other hand, it seems that the design of that 3rd party class is not classloader friendly. Had it used something like the following to load a class that is undefined at the compile time, you might not have this problem.
Class userClass = Thread.currentThread().getContextClassLoader().loadClass(nameOfUserDevelopedClass);
Object plugin = userClass.newInstance();
Similar Messages
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Classpath and 3rd party jar files
We have been searching for a long time and have not been able to find an answer to our question. Do you think that you could help us out?
We need to include 3rd party jar files in our application. Where in the deployment classpath directory structure can we place these. This does not seem to happen when we publish.
We also need to give our clients the ability to modify our configuration. Currently we do this with an xml file, which we place under server/config in our JBoss directory. We also need to find a home for out log4J configuration file.
Where does this type of thing exist in the SAP world?We have had problems with 3rd party jar files also. We ended up including them in the WEB-INF/lib directory of our WAR file and packaging/deploying them everytime.
If you are looking for your project on your server, it is deployed to a directory similar to this:
/usr/sap/J01/JC00/j2ee/cluster/server0/apps
Hope this helps.
Chris -
How to make the ear file including the 3rd party jar files without menttion in the System Classpath.
Hai Sir,
I am facing one problme in weblogic8.1 while depolying the .EAR FILE.
Please help me sir.
Case1) 1) I am using the struts and log4j frameworks and 3rd party jar files with
weblogic8.1.
2) I make the ejbs,webapplications and 3rdparty jar files, ear file the following
dir structure .And i mentioned the Class-path including all jar files in the MANIFEST
OF EAR FILE.
While deploying the ear file it is giving following error.If log4j.jar does not
mention in the Weblogic script file
java.lang.NoClassDefFoundError: org/apache/log4j/Priority
at java.lang.Class.getDeclaredFields0(Native Method)
at java.lang.Class.privateGetDeclaredFields(Class.java:1494)
at java.lang.Class.getDeclaredFields(Class.java:1073)
at weblogic.ejb20.deployer.EJBModule.disableImplClassLoader(EJBModule.java:1082)
at weblogic.ejb20.deployer.EJBModule.setupEJBToImplClassDependencies(EJBModule.jav
a:982)
at weblogic.ejb20.deployer.EJBModule.prepare(EJBModule.java:419)
at weblogic.j2ee.J2EEApplicationContainer.prepareModule(J2EEApplicationContainer.j
ava:2792)
at weblogic.j2ee.J2EEApplicationContainer.prepareModules(J2EEApplicationContainer.
java:1478)
at weblogic.j2ee.J2EEApplicationContainer.prepare(J2EEApplicationContainer.java:11
36)
at weblogic.j2ee.J2EEApplicationContainer.prepare(J2EEApplicationContainer.java:97
5)
at weblogic.management.deploy.slave.SlaveDeployer$ComponentActivateTask.prepareCon
tainer(SlaveDeployer.java:2571)
at weblogic.management.deploy.slave.SlaveDeployer$ActivateTask.createContainer(Sla
veDeployer.java:2523)
at weblogic.management.deploy.slave.SlaveDeployer$ActivateTask.prepare(SlaveDeploy
er.java:2453)
at weblogic.management.deploy.slave.SlaveDeployer.processPrepareTask(SlaveDeployer
.java:820)
at weblogic.management.deploy.slave.SlaveDeployer.prepareDelta(SlaveDeployer.java:
536)
at weblogic.management.deploy.slave.SlaveDeployer.prepareUpdate(SlaveDeployer.java
:494)
at weblogic.drs.internal.SlaveCallbackHandler$1.execute(SlaveCallbackHandler.java:
25)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:178)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:151)
Please provide the soluation without mentioning classpath in the weblogic script
.How to make the EAR file incliding ejbjar,webapplication and 3rd party jar files.
Thanks & Regards,
ASHOK SAMRAT
[email protected]Refer to the section
Handling Utility classes
http://dev2dev.bea.com/products/wlserver/articles/musser.jsp
thanks,
Deepak
"Ashok Samrat" <[email protected]> wrote:
>
Hai Sir,
I am facing one problme in weblogic8.1 while depolying the .EAR FILE.
Please help me sir.
Case1) 1) I am using the struts and log4j frameworks and 3rd party jar
files with
weblogic8.1.
2) I make the ejbs,webapplications and 3rdparty jar files, ear file
the following
dir structure .And i mentioned the Class-path including all jar files
in the MANIFEST
OF EAR FILE.
While deploying the ear file it is giving following error.If log4j.jar
does not
mention in the Weblogic script file
java.lang.NoClassDefFoundError: org/apache/log4j/Priority
at java.lang.Class.getDeclaredFields0(Native Method)
at java.lang.Class.privateGetDeclaredFields(Class.java:1494)
at java.lang.Class.getDeclaredFields(Class.java:1073)
at weblogic.ejb20.deployer.EJBModule.disableImplClassLoader(EJBModule.java:1082)
at weblogic.ejb20.deployer.EJBModule.setupEJBToImplClassDependencies(EJBModule.jav
a:982)
at weblogic.ejb20.deployer.EJBModule.prepare(EJBModule.java:419)
at weblogic.j2ee.J2EEApplicationContainer.prepareModule(J2EEApplicationContainer.j
ava:2792)
at weblogic.j2ee.J2EEApplicationContainer.prepareModules(J2EEApplicationContainer.
java:1478)
at weblogic.j2ee.J2EEApplicationContainer.prepare(J2EEApplicationContainer.java:11
36)
at weblogic.j2ee.J2EEApplicationContainer.prepare(J2EEApplicationContainer.java:97
5)
at weblogic.management.deploy.slave.SlaveDeployer$ComponentActivateTask.prepareCon
tainer(SlaveDeployer.java:2571)
at weblogic.management.deploy.slave.SlaveDeployer$ActivateTask.createContainer(Sla
veDeployer.java:2523)
at weblogic.management.deploy.slave.SlaveDeployer$ActivateTask.prepare(SlaveDeploy
er.java:2453)
at weblogic.management.deploy.slave.SlaveDeployer.processPrepareTask(SlaveDeployer
.java:820)
at weblogic.management.deploy.slave.SlaveDeployer.prepareDelta(SlaveDeployer.java:
536)
at weblogic.management.deploy.slave.SlaveDeployer.prepareUpdate(SlaveDeployer.java
:494)
at weblogic.drs.internal.SlaveCallbackHandler$1.execute(SlaveCallbackHandler.java:
25)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:178)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:151)
Please provide the soluation without mentioning classpath in the weblogic
script
How to make the EAR file incliding ejbjar,webapplication and 3rd party
jar files.
Thanks & Regards,
ASHOK SAMRAT
[email protected] -
How can I include 3rd party jar files with my custom extention?
I'm writing an extension that is dependent upon some 3rd party jars. How can I include/package these with my extension?
we're using the 11g tech preview
thanks,
DylanDo you mean that you need these files to appear in JDeveloper as a library available for the developers who build a project and use your extension?
You can create a library in JDeveloper with JAR files by simply adding the following to your extension.xml file:
<jdeveloper-hook xmlns="http://xmlns.oracle.com/jdeveloper/1013/extension">
- <libraries xmlns="http://xmlns.oracle.com/jdeveloper/1013/jdev-libraries">
<library name="My Extension Library">
<classpath> ${ide.extension.install.home}/lib/some.jar</classpath>
</library>
</jdeveloper-hook> -
Common 3rd Party Jars in an EAR
Hi
I have some common 3rd party jars and zips that are accessed by my WARs and EJB
JARs. Where in my EAR structure do i place them so that these common jars like
classes12, formulaone etc can be accessed from within my WARs and EJB jars?
Regards
SudhindraJust place them at the root level of the .ear and mention them in the
Class-Path entry of the .war manifest.
In article <3e701ee8$[email protected]>, [email protected]
says...
>
Hi
I have some common 3rd party jars and zips that are accessed by my WARs and EJB
JARs. Where in my EAR structure do i place them so that these common jars like
classes12, formulaone etc can be accessed from within my WARs and EJB jars?
Regards
Sudhindra -
Problem deploying new version of 3rd party jar
I have a third party jar file that was recently updated with to a new version. I deleted the old jar file and replaced it with the new version. Modified classpath accordingly. The strange thing is that the only way I could get the classes that use this jar file to work was to recompile them. What am I missing?
When replacing a jar file it is alway a good idea to recompile against it... this ensures backward compatibity and also prevents Incompatible Class Change Errors. Your new 3rd party jar may not be completely backwards compatible, although it is always a good idea to recompile when implementing a new jar that your application depends on.
-
Hi
I have some common 3rd party jars and zips that are accessed by my WARs and EJB
JARs. Where in my EAR structure do i place them so that these common jars like
classes12, formulaone etc can be accessed from within my WARs and EJB jars?
Regards Sudhindrahttp://www.jcp.org
Cheers
mbg
"joe" <[email protected]> wrote in message news:[email protected]..
>
what do you mean by "to integrate this back into the specifications"? whatis the
J2EE way to achieve it if there is one? Thanks
"Mark Griffith" <[email protected]> wrote:
Nope, embrace and extend. We are working to integrate this back into
the
specifications.
cheers
mbg
"Joe" <[email protected]> wrote in message
news:3e77c70d$[email protected]..
Is that part of J2EE or weblogic's implementation?
"Mark Griffith" <[email protected]> wrote:
Upgrade to 8.1 and stick the jar's in myEar/APP-INF/lib
cheers
mbg
"Jen" <[email protected]> wrote in message
news:3e724f46$[email protected]..
Is there a way to put in one shot instead of modifying every .jar
and
..war's manifest
file.
Philip Strube <[email protected]> wrote:
Hi Sudhindra,
you can put them in your EAR (on top level or you can create a
directory
for them, like "libs" or sth.), and then create class-path entriesin
the manifest files of your WAR and ejb-jars.
Example: if myApp.war needs myUtil.jar, then write a line
Class-Path: myUtil.jar
in the manifest file of myApp.war. If myUtil.jar is in libs, write
libs/myUtil.jar and so on.
-- Philip
Sudhindra wrote:
Hi
I have some common 3rd party jars and zips that are accessed
by
my
WARs and EJB
JARs. Where in my EAR structure do i place them so that these
common
jars like
classes12, formulaone etc can be accessed from within my WARs
and
EJB
jars?
Regards Sudhindra -
I have developed an app which uses Java Web Start. I created a self signed certificate for now an that works fine.
What I was wondering about was 3rd party jars. Are they responsible for their own signing if they do system or disk I/O? Do I need to contact the vendor to get a signed version? I don't think I should be signing someone elses archive files.
I need to run with all permissons set.My understanding is that if you sign one jar, you need
to sign them all (and with the same certificate).This is only true within the the same jnlp file - not within the whole app.
You can factor out sets of jar files into component extenions (a seperate jnlp file referenced by the original jnlp file.)
Each component extension can have or not have the all-permissions tag, and if it does, the set of jar files in it can be signed by the same or a diferent certificate chain than the original.
/Dietz -
Accessing 3rd party jars from ear.
I was able to create a war with the 3rd party jars in webinf/lib, register it with weblogic and access them from webapps another ear, after specifying this reference in EACH of the webapps.
However if I want to just make the ear reference these jars, ie., all the webapps in the ear access these jars, without individually specifying the reference, then it gives me an error.
What is different with providing a reference from an EAR ? I added it to the weblogic-application.xml as the docs suggested....http://www.jcp.org
Cheers
mbg
"joe" <[email protected]> wrote in message news:[email protected]..
>
what do you mean by "to integrate this back into the specifications"? whatis the
J2EE way to achieve it if there is one? Thanks
"Mark Griffith" <[email protected]> wrote:
Nope, embrace and extend. We are working to integrate this back into
the
specifications.
cheers
mbg
"Joe" <[email protected]> wrote in message
news:3e77c70d$[email protected]..
Is that part of J2EE or weblogic's implementation?
"Mark Griffith" <[email protected]> wrote:
Upgrade to 8.1 and stick the jar's in myEar/APP-INF/lib
cheers
mbg
"Jen" <[email protected]> wrote in message
news:3e724f46$[email protected]..
Is there a way to put in one shot instead of modifying every .jar
and
..war's manifest
file.
Philip Strube <[email protected]> wrote:
Hi Sudhindra,
you can put them in your EAR (on top level or you can create a
directory
for them, like "libs" or sth.), and then create class-path entriesin
the manifest files of your WAR and ejb-jars.
Example: if myApp.war needs myUtil.jar, then write a line
Class-Path: myUtil.jar
in the manifest file of myApp.war. If myUtil.jar is in libs, write
libs/myUtil.jar and so on.
-- Philip
Sudhindra wrote:
Hi
I have some common 3rd party jars and zips that are accessed
by
my
WARs and EJB
JARs. Where in my EAR structure do i place them so that these
common
jars like
classes12, formulaone etc can be accessed from within my WARs
and
EJB
jars?
Regards Sudhindra -
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