ASF GitHub Bot commented on GEARPUMP-23:

GitHub user manuzhang opened a pull request:


    [GEARPUMP-23] add window dsl

    The PR is opened for early review and the work is in progress with 
following todos.
    - [ ] basic window dsl support with `WindowedWordCount` example
    - [ ] improve `ReduceFunction` to not emit immediate results
    - [ ] add unit tests
    - [ ] add comments and update documentation
    - [ ] support different types of computation (e.g. monoid which doesn't 
require input elements to be held in the window)

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

    $ git pull https://github.com/manuzhang/incubator-gearpump window_dsl

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 #85
commit a69554bcdb2620a16107b23d6cee8eb5308a6043
Author: manuzhang <owenzhang1...@gmail.com>
Date:   2016-09-08T03:22:18Z

    [GEARPUMP-23] add window dsl


> Add DSL window (time series) support 
> -------------------------------------
>                 Key: GEARPUMP-23
>                 URL: https://issues.apache.org/jira/browse/GEARPUMP-23
>             Project: Apache Gearpump
>          Issue Type: Sub-task
>          Components: streaming
>    Affects Versions: 0.8.0
>            Reporter: Kam Kasravi
>            Assignee: Manu Zhang
> Time series support is need for both GEARPUMP-21 and GEARPUMP-22. This was 
> originally github issue  
> [1917|https://github.com/gearpump/gearpump/issues/1917]. Other realtime 
> streaming engines support time windows such as 
> [Flink|https://flink.apache.org/news/2015/12/04/Introducing-windows.html], 
> [Beam|https://www.oreilly.com/ideas/the-world-beyond-batch-streaming-101] and 
> a future release of 
> [Spark|https://issues.apache.org/jira/secure/attachment/12793410/StructuredStreamingProgrammingAbstractionSemanticsandAPIs-ApacheJIRA.pdf].
>  A comparison matrix is found 
> [here|https://docs.google.com/spreadsheets/d/1OM077lZBARrtUi6g0X0O0PHaIbFKCD6v0djRefQRE1I/edit#gid=995660187]

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