GitHub user aljoscha opened a pull request:
https://github.com/apache/incubator-beam/pull/1021
[BEAM-615] Add Support for Processing-Time Timers in FlinkRunner
This adds support for processing-time timers that are checkpointed.
There are no tests for this yet but I ran this minimal example successfully:
```java
pipeline
.apply(CountingInput.unbounded().withRate(5,
Duration.standardSeconds(1)))
.apply(
Window.<Long>into(new GlobalWindows())
.withAllowedLateness(Duration.ZERO)
.triggering(Repeatedly.forever(AfterProcessingTime.pastFirstElementInPane().plusDelayOf(Duration.standardSeconds(1))))
.discardingFiredPanes())
.apply(ParDo.of(new DoFn<Long, KV<String, Long>>() {
@DoFn.ProcessElement
public void proc(ProcessContext ctx) {
ctx.output(KV.of("key", ctx.element()));
}
}))
.apply(Combine.<String, Long>perKey(new
SerializableFunction<Iterable<Long>, Long>() {
@Override
public Long apply(Iterable<Long> input) {
System.out.println("GOT: " + Joiner.on(',').join(input));
return 0L;
}
}));
pipeline.run();
```
R: @mxm for review
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/aljoscha/incubator-beam
flink-processing-time-timers
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-beam/pull/1021.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 #1021
----
commit a1cc636c25561d6300a9a39c3a79d1dfd0eba37f
Author: Aljoscha Krettek <[email protected]>
Date: 2016-09-28T09:49:54Z
[BEAM-615] Add Support for Processing-Time Timers in FlinkRunner Window
Operator
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