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Posted to issues@beam.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2019/09/06 04:12:00 UTC
[jira] [Work logged] (BEAM-7947) Improves the interfaces of classes
such as FnDataService, BundleProcessor, ActiveBundle, etc to change the
parameter type from WindowedValue to T
[ https://issues.apache.org/jira/browse/BEAM-7947?focusedWorklogId=307611&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-307611 ]
ASF GitHub Bot logged work on BEAM-7947:
----------------------------------------
Author: ASF GitHub Bot
Created on: 06/Sep/19 04:11
Start Date: 06/Sep/19 04:11
Worklog Time Spent: 10m
Work Description: sunjincheng121 commented on pull request #9496: [BEAM-7947] Improves the interfaces of classes such as FnDataService,…
URL: https://github.com/apache/beam/pull/9496
Currently, Both `Coder<WindowedValue<T>>` and `FnDataReceiver<WindowedValue<T>>` use `WindowedValue` as the data structure that both sides of Runner and SDK Harness know each other. Control Plane/Data Plane/State Plane/Logging is a highly abstraction, such as Control Plane and Logging, these are common requirements for all multi-language platforms. For example, the Flink community is also discussing how to support Python UDF, as well as how to deal with docker environment. how to data transfer, how to state access, how to logging etc. If Beam can further abstract these service interfaces, i.e., interface definitions are compatible with multiple engines, and finally provided to other projects in the form of class libraries, it definitely will help other platforms that want to support multiple languages. Take the FnDataService#receive interface as an example, and turn `WindowedValue<T>` into `T` so that other platforms can be extended arbitrarily, as follows:
```
<T> InboundDataClient receive(LogicalEndpoint inputLocation, Coder<T> coder, FnDataReceiver<T>> listener);
```
For details of the discussion can be found in here:
https://lists.apache.org/list.html?dev@beam.apache.org:lte=1M:%5BDISCUSS%5D%20Turn%20%60WindowedValue
Post-Commit Tests Status (on master branch)
------------------------------------------------------------------------------------------------
Lang | SDK | Apex | Dataflow | Flink | Gearpump | Samza | Spark
--- | --- | --- | --- | --- | --- | --- | ---
Go | [](https://builds.apache.org/job/beam_PostCommit_Go/lastCompletedBuild/) | --- | --- | [](https://builds.apache.org/job/beam_PostCommit_Go_VR_Flink/lastCompletedBuild/) | --- | --- | [](https://builds.apache.org/job/beam_PostCommit_Go_VR_Spark/lastCompletedBuild/)
Java | [](https://builds.apache.org/job/beam_PostCommit_Java/lastCompletedBuild/) | [](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Apex/lastCompletedBuild/) | [](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Dataflow/lastCompletedBuild/) | [](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Flink/lastCompletedBuild/)<br>[](https://builds.apache.org/job/beam_PostCommit_Java_PVR_Flink_Batch/lastCompletedBuild/)<br>[](https://builds.apache.org/job/beam_PostCommit_Java_PVR_Flink_Streaming/lastCompletedBuild/) | [](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Gearpump/lastCompletedBuild/) | [](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Samza/lastCompletedBuild/) | [](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Spark/lastCompletedBuild/)<br>[](https://builds.apache.org/job/beam_PostCommit_Java_PVR_Spark_Batch/lastCompletedBuild/)
Python | [](https://builds.apache.org/job/beam_PostCommit_Python2/lastCompletedBuild/)<br>[](https://builds.apache.org/job/beam_PostCommit_Python35/lastCompletedBuild/)<br>[](https://builds.apache.org/job/beam_PostCommit_Python36/lastCompletedBuild/)<br>[](https://builds.apache.org/job/beam_PostCommit_Python37/lastCompletedBuild/) | --- | [](https://builds.apache.org/job/beam_PostCommit_Py_VR_Dataflow/lastCompletedBuild/)<br>[](https://builds.apache.org/job/beam_PostCommit_Py_ValCont/lastCompletedBuild/) | [](https://builds.apache.org/job/beam_PreCommit_Python_PVR_Flink_Cron/lastCompletedBuild/) | --- | --- | [](https://builds.apache.org/job/beam_PostCommit_Python_VR_Spark/lastCompletedBuild/)
XLang | --- | --- | --- | [](https://builds.apache.org/job/beam_PostCommit_XVR_Flink/lastCompletedBuild/) | --- | --- | ---
Pre-Commit Tests Status (on master branch)
------------------------------------------------------------------------------------------------
--- |Java | Python | Go | Website
--- | --- | --- | --- | ---
Non-portable | [](https://builds.apache.org/job/beam_PreCommit_Java_Cron/lastCompletedBuild/) | [](https://builds.apache.org/job/beam_PreCommit_Python_Cron/lastCompletedBuild/) | [](https://builds.apache.org/job/beam_PreCommit_Go_Cron/lastCompletedBuild/) | [](https://builds.apache.org/job/beam_PreCommit_Website_Cron/lastCompletedBuild/)
Portable | --- | [](https://builds.apache.org/job/beam_PreCommit_Portable_Python_Cron/lastCompletedBuild/) | --- | ---
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Issue Time Tracking
-------------------
Worklog Id: (was: 307611)
Remaining Estimate: 0h
Time Spent: 10m
> Improves the interfaces of classes such as FnDataService, BundleProcessor, ActiveBundle, etc to change the parameter type from WindowedValue<T> to T
> ----------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: BEAM-7947
> URL: https://issues.apache.org/jira/browse/BEAM-7947
> Project: Beam
> Issue Type: Sub-task
> Components: java-fn-execution
> Reporter: sunjincheng
> Assignee: sunjincheng
> Priority: Major
> Fix For: 2.16.0
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Both `Coder<WindowedValue<T>>` and `FnDataReceiver<WindowedValue<T>>` use `WindowedValue` as the data structure that both sides of Runner and SDK Harness know each other. Control Plane/Data Plane/State Plane/Logging is a highly abstraction, such as Control Plane and Logging, these are common requirements for all multi-language platforms. For example, the Flink community is also discussing how to support Python UDF, as well as how to deal with docker environment. how to data transfer, how to state access, how to logging etc. If Beam can further abstract these service interfaces, i.e., interface definitions are compatible with multiple engines, and finally provided to other projects in the form of class libraries, it definitely will help other platforms that want to support multiple languages. Here I am to throw out a minnow to catch a whale, take the FnDataService#receive interface as an example, and turn `WindowedValue<T>` into `T` so that other platforms can be extended arbitrarily, as follows:
> {code}
> <T> InboundDataClient receive(LogicalEndpoint inputLocation, Coder<T> coder, FnDataReceiver<T>> listener);
> {code}
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