Which classloader loads the startup class?
Hi!
Which classloader loads the startup and shutdown classes?
Thx.
A.
You're correct.
Just to be 100% clear, the startup classes defined in config.xml are loaded from the $CLASSPATH, domain/lib (in 9.x) or the JDK extensions directory.
Startup classes which are defined in the weblogic-application.xml (application-scoped startup classes) can be in the application or in any of the server-wide classpath locations.
-- Rob
WLS Blog http://dev2dev.bea.com/blog/rwoollen/
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"Carsten Kaiser" <[email protected]> wrote in message
news:[email protected]..
Hello,
we have the following problem: How to initialize our application
correctly???
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incoming
messages. Due to a shortcoming in the JMS implementation (Order of
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have to access this singleton, what implies latter has to be initialized
prior to the application
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be loaded before
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loaded, but we are
not able to access the MBeanHome interface (We like to register MBean to
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javax.naming.NameNotFoundException: Unable to resolve
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at weblogic.rmi.internal.ServerRequest.sendReceive(ServerRequest.java:174)
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Startup class not found if included in a jar inside the ear
I have written a startup class, i have packed it in a jar file(along with some
other classes). This jar is then packed in side an ear file.(This way i get one
single distribution file). I have added the startup class in the config.xml using
weblogic console.But at start up weblogic is unable to find the class. How to
tell weblogic about the location of the class(classpath) which is inside the ear
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<Aug 21, 2003 8:07:23 PM IST> <Emergency> <WebLogicServer> <BEA-000342> <Unable
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server due to startup class failure WISORCODES_SERVER - with nested exception:
[java.lang.ClassNotFoundException: com.wisor.common.wisorcodes.rmi.WisorCodesServer]>
*************************************************************************** The
WebLogic Server did not start up properly. Exception raised: 'weblogic.t3.srvr.FatalStartupException:
Can't start server due to startup class failure WISORCODES_ SERVER - with nested
exception: [java.lang.ClassNotFoundException: com.wisor.common.wisorcodes.rmi.WisorCodesServer]'
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class failure WISORCODES_SERVER - wi th nested exception: [java.lang.ClassNotFoundException:
com.wisor.common.wisorcodes.rmi.WisorCodesServer] ***************************************************************************Shirish:
Classes that are scoped in the application are only visible within the
application, not to the system classloader.
If you want to have startup classses scoped inside an EAR then you need to
use Application lifecycle listeners to actually activate these startup
classes. Application lifecycle listeners are a replacement for startup
classes.
You can check out an example of this in 8.1:
$BEA_HOME/weblogic81/samples/server/examples/src/examples/splitdir/helloWorl
dEar
Docs for it are:
$BEA_HOME\weblogic81\samples\server\examples\src\examples\splitdir\helloWorl
dEar\javadoc\index.html
Check out:
$BEA_HOME\weblogic81\samples\server\examples\src\examples\splitdir\helloWorl
dEar\META-INF\weblogic-applcation.xml
<weblogic-application>
<listener>
<listener-class>examples.splitdir.hello.startup.ApplicationStartup</listener
-class>
</listener>
</weblogic-application>
and
$BEA_HOME\weblogic81\samples\server\examples\src\examples\splitdir\helloWorl
dEar
/appStartup/examples/splitdir/hello/startup/ApplicationStartup.java
Now if you have a "startup class" that needs to be accessible for the entire
Server for a set of applications, I suggest just writing a single EAR with a
dummy web-app (I think you may need a dummy module) and an applicaiton
lifecycle listener, and have this EAR deploy before any other apps.
Cheers
mbg
"Shirish" <[email protected]> wrote in message
news:[email protected]...
>
I have written a startup class, i have packed it in a jar file(along withsome
other classes). This jar is then packed in side an ear file.(This way iget one
single distribution file). I have added the startup class in theconfig.xml using
weblogic console.But at start up weblogic is unable to find the class. Howto
tell weblogic about the location of the class(classpath) which is insidethe ear
file. Error i get is as follows
<Aug 21, 2003 8:07:23 PM IST> <Emergency> <WebLogicServer> <BEA-000342><Unable
to initialize the server: weblogic.t3. srvr.FatalStartupException: Can'tstart
server due to startup class failure WISORCODES_SERVER - with nestedexception:
>
>
[java.lang.ClassNotFoundException:com.wisor.common.wisorcodes.rmi.WisorCodesServer]>
>
The
WebLogic Server did not start up properly. Exception raised:'weblogic.t3.srvr.FatalStartupException:
Can't start server due to startup class failure WISORCODES_ SERVER - withnested
exception: [java.lang.ClassNotFoundException:com.wisor.common.wisorcodes.rmi.WisorCodesServer]'
Reason: weblogic.t3.srvr.FatalStartupException: Can't start server due tostartup
class failure WISORCODES_SERVER - wi th nested exception:[java.lang.ClassNotFoundException:
com.wisor.common.wisorcodes.rmi.WisorCodesServer]***************************************************************************
>
>
>
>
>
>
>
>
>
>
> -
Hi there,
Do I have control over the load sequence of the startup classes? I
need to make sure one class start before the other. I add the one needs to
be start first before the other one in config.xml, but Weblogic always load
the other one first. Why?
Thank youWLS 6.1 supports deployment order in which
you can set the order for each deployments
see 6.1 docs
Kumar
Chi-Ming Yang wrote:
OK!
Thank you
I tried. The trick works for WLS 6.0 with SP2.
Funny thing is that WLS loads names start with "Z" before "A".
Thank you
>
"Deyan D. Bektchiev" <[email protected]> wrote in message
news:[email protected]..
What I'm saying is that WLS 6.0 might work with the class name trick (Ihaven't
tried it) but I would not use it even if it worked for me since somethingas
simple as a hash code change in a JDK version might break the order youdesire.
In 6.1 there might be a way to do that but I don't know what it is.
--dejan
Chi-Ming Yang wrote:
Are you saying only WLS 610 will work with the class name trick?
I am using WLS 6.0. Bad luck!
>
"Deyan D. Bektchiev" <[email protected]> wrote in message
news:[email protected]..
There was a posting that said that if you name you classes for example
Class1
Class2
the Class1 would always be loaded before Class2 but the sure thing is
to
create
only one startup class that loads the real startup classes in the
order
you
want them to be loaded.
Maybe in 6.1 BEA has took care of this but in 6.0 you just cannot (the
why
is
left for the BEA developers to answer).
--dejan
Chi-Ming Yang wrote:
Hi there,
Do I have control over the load sequence of the startup
classes?
I
need to make sure one class start before the other. I add the one
needs
to
be start first before the other one in config.xml, but Weblogic
always
load
the other one first. Why?
Thank you
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