GitHub user tillrohrmann opened a pull request:

    https://github.com/apache/flink/pull/5451

    [FLINK-8632] [flip6] Introduce generalized asynchronous operation handlers

    ## What is the purpose of the change
    
    The asynchronous operation handlers are the generalization of the 
SavepointHandlers.
    They consist of a Trigger- and a StatusHandler. The TriggerHandler is used 
to trigger
    an asynchronous operation. The handler stores the operation future and 
returns a
    trigger id. The trigger id can be used to query the status of the operation 
via the
    StatusHandler. Once the operation has completed, the StatusHandler will 
return the
    result.
    
    This PR is based on #5450.
    
    ## Brief change log
    
    - Introduced `AbstractAsynchronousOperationHandlers` derived from 
`SavepointHandlers`
    - Reworked `SavepointHandlers` according to 
`AbstractAsynchronousOperationHandlers` interface
    
    ## Verifying this change
    
    - Added `AbstractAsynchronousOperationHandlersTest`
    - Also tested by `SavepointHandlersTest`
    
    ## Does this pull request potentially affect one of the following parts:
    
      - Dependencies (does it add or upgrade a dependency): (no)
      - The public API, i.e., is any changed class annotated with 
`@Public(Evolving)`: (no)
      - The serializers: (no)
      - The runtime per-record code paths (performance sensitive): (no)
      - Anything that affects deployment or recovery: JobManager (and its 
components), Checkpointing, Yarn/Mesos, ZooKeeper: (no)
      - The S3 file system connector: (no)
    
    ## Documentation
    
      - Does this pull request introduce a new feature? (no)
      - If yes, how is the feature documented? (not applicable)


You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/tillrohrmann/flink 
asynchronousOperationHandlers

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/flink/pull/5451.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #5451
    
----
commit b0efaa09c3b39e31ba130c668abe39af40473fb4
Author: Till Rohrmann <trohrmann@...>
Date:   2018-02-03T16:41:51Z

    [FLINK-8631] [rest] Add support for generic types to the RestClient
    
    This commit allows the Restclient to receive generic response types. In 
order
    to do this, the MessageHeaders contain now information about the generic
    type parameters of the response type.

commit e26cf11281b48bd04372f12363397c9267e4413a
Author: Till Rohrmann <trohrmann@...>
Date:   2018-02-02T10:23:00Z

    [FLINK-8632] [flip6] Introduce generalized asynchronous operation handlers
    
    The asynchronous operation handlers are the generalization of the 
SavepointHandlers.
    They consist of a Trigger- and a StatusHandler. The TriggerHandler is used 
to trigger
    an asynchronous operation. The handler stores the operation future and 
returns a
    trigger id. The trigger id can be used to query the status of the operation 
via the
    StatusHandler. Once the operation has completed, the StatusHandler will 
return the
    result.

----


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