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Posted to commits@beam.apache.org by "Kenneth Knowles (JIRA)" <ji...@apache.org> on 2016/09/21 15:41:20 UTC
[jira] [Updated] (BEAM-656) Add support for side inputs/outputs to
Java 8 lambdas in MapElements
[ https://issues.apache.org/jira/browse/BEAM-656?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Kenneth Knowles updated BEAM-656:
---------------------------------
Description:
Currently there's no way to use side inputs or outputs within Java 8 lambdas and MapElements. It would be nice if you could do something like this:
{code:java}
PCollection<Integer> wordLengths = words.apply(
MapElements.via((String word) -> {
int sideInput1= [[[ GetSideInputHere(); ]]]
[[[ SetSideOutputHere ]]] (sideInput1+word.length());
return word.length();
}).withOutputType(new TypeDescriptor<Integer>() {});
{code}
was:
Currently there's no way to use side inputs or outputs within Java 8 lambdas and MapElements. It would be nice if you could do something like this:
PCollection<Integer> wordLengths = words.apply(
MapElements.via((String word) -> {
int sideInput1= [[[ GetSideInputHere(); ]]]
[[[ SetSideOutputHere ]]] (sideInput1+word.length());
return word.length();
}).withOutputType(new TypeDescriptor<Integer>() {});
> Add support for side inputs/outputs to Java 8 lambdas in MapElements
> --------------------------------------------------------------------
>
> Key: BEAM-656
> URL: https://issues.apache.org/jira/browse/BEAM-656
> Project: Beam
> Issue Type: Improvement
> Components: sdk-ideas
> Environment: Java 8
> Reporter: Jani Patokallio
> Assignee: James Malone
> Priority: Minor
>
> Currently there's no way to use side inputs or outputs within Java 8 lambdas and MapElements. It would be nice if you could do something like this:
> {code:java}
> PCollection<Integer> wordLengths = words.apply(
> MapElements.via((String word) -> {
> int sideInput1= [[[ GetSideInputHere(); ]]]
> [[[ SetSideOutputHere ]]] (sideInput1+word.length());
> return word.length();
> }).withOutputType(new TypeDescriptor<Integer>() {});
> {code}
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