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Eugene Kirpichov closed BEAM-1820. ---------------------------------- Resolution: Won't Fix Fix Version/s: Not applicable The consensus on dev@ is that instead, PTransform's should always provide a Coder for their output; and the natural generalization to Source is that sources also always should provide a Coder for their output; letting the user configure the Source with an explicit Coder if necessary. > Source.getDefaultOutputCoder() should be @Nullable > -------------------------------------------------- > > Key: BEAM-1820 > URL: https://issues.apache.org/jira/browse/BEAM-1820 > Project: Beam > Issue Type: Improvement > Components: sdk-java-core > Reporter: Eugene Kirpichov > Assignee: Ćukasz Gajowy > Labels: easyfix, starter > Fix For: Not applicable > > > Source.getDefaultOutputCoder() returns a coder for elements produced by the > source. > However, the Source objects are nearly always hidden from the user and > instead encapsulated in a transform. Often, an enclosing transform has a > better idea of what coder should be used to encode these elements (e.g. a > user supplied a Coder to that transform's configuration). In that case, it'd > be good if Source.getDefaultOutputCoder() could just return null, and coder > would have to be handled by the enclosing transform or perhaps specified on > the output of that transform explicitly. > Right now there's a bunch of code in the SDK and runners that assumes > Source.getDefaultOutputCoder() returns non-null. That code would need to be > fixed to instead use the coder set on the collection produced by > Read.from(source). > It all appears pretty easy to fix, so this is a good starter item. -- This message was sent by Atlassian JIRA (v6.4.14#64029)