[infinispan-issues] [JBoss JIRA] Created: (ISPN-244) Enable external user/framework defined Externalizers

[Galder Zamarreno (JIRA)]

Enable external user/framework defined Externalizers
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                 Key: ISPN-244
                 URL: https://jira.jboss.org/jira/browse/ISPN-244
             Project: Infinispan
          Issue Type: Feature Request
          Components: RPC
            Reporter: Galder Zamarreno
             Fix For: 4.1.0.BETA1


Create an internal magic number (i.e. -1 or 255) for user defined externalizers. This is done to avoid users using our number space.

So, internally: <magic_number> <stream>
Users: <magic_number><user defined magic number (int)> <stream>

Mandate unsigned ints so that we can optimise by sending them as variable lenght
Internal frameworks could use high enough numbers for example up to 2 bytes: 5000, 7000, 20000
1 byte: 128
2 bytes: 32767
3 bytes: ...

GlobalConfiguration.registerMarshallable(Class type, Externalizer ext, int id);

Maybe CacheManager better?

CacheManager.registerMarshallable(Class type, Externalizer ext, int id);

Future improvement, maybe generate ids automatically for user defined classes?

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