GitHub user zhijiangW opened a pull request:

    [FLINK-7394][core] Implement basic InputChannel for credit-based logic

    ## What is the purpose of the change
    This pull request prepares the basic works for credit-based interaction 
with netty pipeline which will be submitted in next pull request.
    This pull request depends on previous [FixedBufferPool 
PR]( whose commit is also included 
for passing travis, so review the second commit for this pull request change.
    In order not to affect the current process and existing cases, a temporary 
method called `testRegisterTask` is added in `NetworkEnvironment` for verifying 
partial behaviors until the whole feature codes are submitted.
    ## Brief change log
      - *`NetworkEnvironment` creates the `FixedBufferPool` for 
      - *Assigns the exclusive buffers directly to `RemoteInputChannel` during 
registering task*
      - *`RemoteInputChannel` implements `BufferRecycler` interface to manage 
the exclusive buffers itself*
      - *`RemoteInputChannel` implements `BufferPoolListener` interface to be 
notified available floating buffers from buffer pool*
      - *`RemoteInputChannel` maintains unannounced credit and current sender 
    ## Verifying this change
    This change added tests and can be verified as follows:
      - *Added test for registering task with FixedBufferPool creation and 
exclusive buffers assignment*
      - *The credit and backlog logics will be verified after implementing the 
netty pipeline part in the next pull request*
    ## 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): (yes)
      - Anything that affects deployment or recovery: JobManager (and its 
components), Checkpointing, Yarn/Mesos, ZooKeeper: (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 FLINK-7394

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

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

    This closes #4499
commit 5c7a27f6fdd215150174c7827cc87b5ea08e01bc
Author: Zhijiang <>
Date:   2017-08-07T09:31:17Z

    [FLINK-7378][core]Implement the FixedBufferPool for floating buffers of 

commit b3cabd92051b2682c869742a5a346193b3d4ca33
Author: Zhijiang <>
Date:   2017-08-09T05:43:56Z

    [FLINK-7394][core]Implement basic InputChannel for credit-based logic


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