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From "Gary Helmling (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-4425) Provide access to RpcServer instance from RegionServerServices
Date Fri, 16 Sep 2011 22:51:09 GMT
Provide access to RpcServer instance from RegionServerServices

                 Key: HBASE-4425
                 URL: https://issues.apache.org/jira/browse/HBASE-4425
             Project: HBase
          Issue Type: Improvement
          Components: coprocessors, regionserver
            Reporter: Gary Helmling

In some cases, RegionObserver coprocessors may want to directly access the running RpcServer
instance on the region server.  For token based authentication, for example, this is needed
for a coprocessor to interact with the SecretManager that validates authentication tokens
in the secure RPC engine.  With the addition of async call handling on the server-side, this
becomes additionally important if coprocessors want to send back delayed responses to clients.
 In this case, the coprocessor would need to be able to call RpcServer.getCurrentCall() to
send back the response.

So I propose we add access to the RpcServer in RegionServerServices:
   * Returns a reference to the region server's RPC server
  public RpcServer getRpcServer();

We can simultaneously drop the existing RegionServerServices.getRpcMetrics() method, since
this could then be accessed via RpcServer.getRpcMetrics().

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