[jira] [Created] (KAFKA-1822) Add "echo" request

["Gwen Shapira (JIRA)" <ji...@apache.org>]

Gwen Shapira created KAFKA-1822:
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             Summary: Add "echo" request
                 Key: KAFKA-1822
                 URL: https://issues.apache.org/jira/browse/KAFKA-1822
             Project: Kafka
          Issue Type: Improvement
          Components: core
            Reporter: Gwen Shapira
            Assignee: Gwen Shapira



Currently there is no simple way to generate a request and validate we receive a response without adding a lot of dependencies for the test.
Kafka request classes have quite a few dependencies, so they are not really usable when testing infrastructure components or clients.
Generating a byte-array with meaningless request key id as it is done in SocketServerTest results in unknown request exception that must be handled. 

I suggest adding an EchoRequest, EchoResponse and EchoHandler. The Request will be the usual header and a bytearray. The Response will be a response header and the same bytearray echoed back.

Should be useful for client developers and when testing infrastructure changes.





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