GitHub user manuzhang opened a pull request:
https://github.com/apache/incubator-beam/pull/323
[BEAM-79] add Gearpump runner
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---
This PR adds Gearpump runner to Beam meeting the goals of phase 1 in the
[design
document](https://docs.google.com/document/d/1nw64QUWVfT8L7FUprPGLEeNjSBpDMkn1otfLt2rHM5g/edit).
The Gearpump runner supports the following functionalities,
* Transformations: ParDo, GroupByKey, Flatten
* Windows: using Beam's window logic and code
* side outputs
* serialization/deserialization: using Gearpump's Kryo serializer
* sources: Beam's UnboundedSource
* message delivery guarantee: at-most-once
* tests: integration test for various translators
Here's a snapshot of running the following Beam example on Gearpump cluster
```java
PCollection<KV<String, Long>> wordCounts =
p.apply(Read.from(new UnboundedTextSource()).named("WordStream"))
.apply(ParDo.of(new ExtractWordsFn()))
.apply(Window.<String>into(FixedWindows.of(Duration.standardSeconds(10))))
.apply(Count.<String>perElement());
wordCounts.apply(ParDo.of(new FormatAsStringFn()));
```
Note that the Gearpump runner is still in early stage and lacking
capabilities like trigger, side inputs, aggregator. However, I'd like to have
the community to get a feel of what Gearpump is like, whether Beam and Gearpump
go well, and gather ideas for improvements.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/manuzhang/incubator-beam gearpump_runner
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-beam/pull/323.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 #323
----
commit 73e5978f599bcf32ed8c2f1d54b6bd3bd8350092
Author: manuzhang <[email protected]>
Date: 2016-03-15T08:15:16Z
[BEAM-79] add Gearpump runner
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