"Multicast" support for EJB-EJB calls to cluster

What I have to work with:
+ WebLogic Server 5.1 cluster
+ Stateless session EJBs
What I want to do:
+ Be able to know list of available servers in the cluster
and use this list to broadcast same information to all EJBs
with same name in cluster
+ I understand that the cluster-aware EJB stub has this list
when a client gets a home reference to the EJB Object
+ I have not seen any specific WebLogic API to get this list
either by accessing the cluster-aware JNDI table or the
cluster-aware EJB stub.
+ Othwerwise, I would then need to implement my own server
list manager to get this list. Such task should not be that difficult.
Why I want to do the above:
+ I would like to implement a EJB sendAll() method that will
send the same request to all EJBs of the same JNDI name in the cluster.
+ Please correct me if I am wrong but I have not seen anywhere
in the WebLogic 5.1 documentation regarding the automatic multicast
ability of broadcasting EJBs calls via EJB-to-EJB communication to a
cluster.
+ I understand that multicasting is only used internally, ie,
heartbeats.
Plus, I believe that RMI does not support multicasting.

I'd like to hear a bit more about what you are trying to do. (at a
higher level)
RMI / EJB is a point-to-point model. A client is making an RMI call to
a server. Granted, in our clustering solution, there may not be one
physical server, but the idea is to give the appearance of one big,
reliable server.
-- Rob
Ren Bitonio wrote:
>
What I have to work with:
+ WebLogic Server 5.1 cluster
+ Stateless session EJBs
What I want to do:
+ Be able to know list of available servers in the cluster
and use this list to broadcast same information to all EJBs
with same name in cluster
+ I understand that the cluster-aware EJB stub has this list
when a client gets a home reference to the EJB Object
+ I have not seen any specific WebLogic API to get this list
either by accessing the cluster-aware JNDI table or the
cluster-aware EJB stub.
+ Othwerwise, I would then need to implement my own server
list manager to get this list. Such task should not be that difficult.
Why I want to do the above:
+ I would like to implement a EJB sendAll() method that will
send the same request to all EJBs of the same JNDI name in the cluster.
+ Please correct me if I am wrong but I have not seen anywhere
in the WebLogic 5.1 documentation regarding the automatic multicast
ability of broadcasting EJBs calls via EJB-to-EJB communication to a
cluster.
+ I understand that multicasting is only used internally, ie,
heartbeats.
Plus, I believe that RMI does not support multicasting.--
Coming Soon: Building J2EE Applications & BEA WebLogic Server
by Michael Girdley, Rob Woollen, and Sandra Emerson
http://learnweblogic.com

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k.java:64)
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utor.java:886)
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t the GlobalTransactionsProtocol attribute to LoggingLastResource (recommended)
or EmulateTwoPhaseCommit for the Data Source = EBSConnection
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.>
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lTransactionsProtocol attribute to LoggingLastResource (recommended) or EmulateT
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>
<12 Oct, 2012 12:34:40 PM IST> <Error> <oracle.soa.bpel.engine.dispatch> <BEA-00
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Message handle error.
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driver does not support XA, hence cannot be a participant in two-phase commit.
To force this participation, set the GlobalTransactionsProtocol attribute to Log
gingLastResource (recommended) or EmulateTwoPhaseCommit for the Data Source = EB
SConnection
This error contained an exception thrown by the message handler.
Check the exception trace in the log (with logging level set to debug mode).
ORABPEL-05002
Message handle error.
error while attempting to process the message "com.collaxa.cube.engine.dispatch.
message.instance.CallbackDeliveryMessage"; the reported exception is: Error comm
itting transaction:; nested exception is: javax.transaction.xa.XAException: JDBC
driver does not support XA, hence cannot be a participant in two-phase commit.
To force this participation, set the GlobalTransactionsProtocol attribute to Log
gingLastResource (recommended) or EmulateTwoPhaseCommit for the Data Source = EB
SConnection
This error contained an exception thrown by the message handler.
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at com.collaxa.cube.engine.dispatch.DispatchHelper.handleMessage(Dispatc
hHelper.java:207)
at com.collaxa.cube.engine.dispatch.BaseDispatchTask.process(BaseDispatc
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at com.collaxa.cube.engine.dispatch.BaseDispatchTask.run(BaseDispatchTas
k.java:64)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExec
utor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor
.java:908)
at java.lang.Thread.run(Thread.java:662)
>
Could any body help on this issue.It is little bit urgent for us to resolve.
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Thanks Sudipto Desmukh,
The link is helpful me to resolve this issue.
Thanks,
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