[BEAM-6720] Add binary compatibility adapters for ProcessFunction/InferableFunction overloads

[kennknowles]

Because method overloads are resolved statically, 2.10.0 is compile compatible but not binary compatible with 2.9.0.

This introduces adapters where needed to restore binary compatibility.

Testing will be by hand and one-off as I'm not sure the infrastructure that would be needed to test these automatically.

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Post-Commit Tests Status (on master branch)

Lang	SDK	Apex	Dataflow	Flink	Gearpump	Samza	Spark
Go		---	---	---	---	---	---
Java
Python		---			---	---	---

See .test-infra/jenkins/README for trigger phrase, status and link of all Jenkins jobs.

[kennknowles]

R: @jklukas @aaltay

[jklukas]

#7160 also changed the signatures of TypeDescriptors.inputOf and .outputOf. Would they also need adapters?

[kennknowles]

OK, added the next couple adapters and eliminated use of rawtypes.

[aaltay]

Run Java_Examples_Dataflow PreCommit"

[aaltay]

There is a compiler warning failing the build: (on Java PreCommit)

15:06:33 > Task :beam-sdks-java-extensions-euphoria:compileJava FAILED
15:06:33 /home/jenkins/jenkins-slave/workspace/beam_PreCommit_Java_Commit/src/sdks/java/extensions/euphoria/src/main/java/org/apache/beam/sdk/extensions/euphoria/core/translate/ReduceByKeyTranslator.java:69: warning: [deprecation] <InputT,OutputT>via(SimpleFunction<InputT,OutputT>) in MapElements has been deprecated
15:06:33 MapElements.via(new KeyValueExtractor<>(keyExtractor, valueExtractor));
15:06:33 ^
15:06:33 where InputT,OutputT are type-variables:
15:06:33 InputT extends Object declared in method <InputT,OutputT>via(SimpleFunction<InputT,OutputT>)
15:06:33 OutputT extends Object declared in method <InputT,OutputT>via(SimpleFunction<InputT,OutputT>)
15:06:33 error: warnings found and -Werror specified
15:06:33 1 error
15:06:33 1 warning

Is this because the Deprecated annotation?

[aaltay]

Run Java_Examples_Dataflow PreCommit

[aaltay]

This use (https://github.com/apache/beam/blob/master/sdks/java/extensions/euphoria/src/main/java/org/apache/beam/sdk/extensions/euphoria/core/translate/ReduceByKeyTranslator.java#L143) of SimpleFunction need to be changed to use ProcessFunction.

[kennknowles]

I should remove the deprecation, because overloading will prefer the more specific class.

[aaltay]

I should remove the deprecation, because overloading will prefer the more specific class.

OK. I think we can still update the euphoria code (not in this PR).

Let me know if I can help here.

[aaltay]

The error looks like a flake, re-running the test just in case.

[aaltay]

Run Java PreCommit