[jboss-jira] [JBoss JIRA] Created: (JBCACHE-754) RPC return values to use a marshaller as well

[Manik Surtani (JIRA)]

RPC return values to use a marshaller as well
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                 Key: JBCACHE-754
                 URL: http://jira.jboss.com/jira/browse/JBCACHE-754
             Project: JBoss Cache
          Issue Type: Feature Request
      Security Level: Public (Everyone can see)
    Affects Versions: 1.4.0, 2.0.0
            Reporter: Manik Surtani
         Assigned To: Manik Surtani
             Fix For: 2.1.0


Currently, all RPC calls go through the VersionAwareMarshaller which is responsible for efficiently marshalling JBC internal objects as well as user objects using JBoss Serialization.

Return values and exceptions, on the other hand, are marshalled/unmarshalled using JGroups' Util.{to|from}ByteBuffer() which uses standard object serialization.

The problems here are twofold:

1) Relatively inefficient (in speed as well as byte array size) marshalling/unmarshalling for return values
2) Potential class loader problems

Most RPC calls in JBoss Cache do not have return values so this is not a problem that comes up often, but certain features (clustered cache loader, data gravitation in buddy replication) rely on return values.

The solution to this problem is to be able to register a marshaller with the JGroups RPCDispatcher for return values (and exceptions) as well as for the RPC calls themselves.

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