[jira] [Created] (KUDU-1715) Add a way to set ReplicaSelection to the java client

["David Alves (JIRA)" <ji...@apache.org>]

David Alves created KUDU-1715:
---------------------------------

             Summary: Add a way to set ReplicaSelection to the java client
                 Key: KUDU-1715
                 URL: https://issues.apache.org/jira/browse/KUDU-1715
             Project: Kudu
          Issue Type: Sub-task
          Components: client
    Affects Versions: 1.1.0
            Reporter: David Alves
            Assignee: Jean-Daniel Cryans
             Fix For: 1.2.0


On the C++ client we're able to set a ReplicaSelection policy on the KuduScanner that hints at which replica should be chosen to perform the scan:
{code}
Status SetSelection(KuduClient::ReplicaSelection selection)
{code}
... where ReplicaSelection can have the following values:
{code}
    LEADER_ONLY,      ///< Select the LEADER replica.

    CLOSEST_REPLICA,  ///< Select the closest replica to the client,
                      ///< or a random one if all replicas are equidistant.
    FIRST_REPLICA     ///< Select the first replica in the list.
{code}

Having the same functionality in the java client will increase our confidence in our tests that use and would be helpful for perf, since it's pretty common for leaders to get clustered and the java client only scans from the leader currently.



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