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From "Kenneth Knowles (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (BEAM-2445) DSL SQL to use service locator pattern to automatically register UDFs
Date Tue, 27 Feb 2018 23:37:00 GMT

    [ https://issues.apache.org/jira/browse/BEAM-2445?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16379483#comment-16379483
] 

Kenneth Knowles commented on BEAM-2445:
---------------------------------------

This seems like an open-ended feature request, so let's just add Fix Version when we have
addressed it.

> DSL SQL to use service locator pattern to automatically register UDFs
> ---------------------------------------------------------------------
>
>                 Key: BEAM-2445
>                 URL: https://issues.apache.org/jira/browse/BEAM-2445
>             Project: Beam
>          Issue Type: Improvement
>          Components: dsl-sql
>            Reporter: Luke Cwik
>            Assignee: Xu Mingmin
>            Priority: Major
>
> Use a service locator pattern to find UDFs that can be registered. The service loader
can be used to register UDFs for standard functions via DSL SQL, additional UDFs registered
by third party libraries, and end user created UDFs.
> Example ServiceLoader usage within Apache Beam to find coder providers:
> https://github.com/apache/beam/blob/7126fdc6ee5671e99a2dede3f25ba616aa0e8fa4/sdks/java/core/src/main/java/org/apache/beam/sdk/coders/CoderRegistry.java#L147



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