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Posted to github@beam.apache.org by GitBox <gi...@apache.org> on 2020/05/08 15:05:44 UTC
[GitHub] [beam] steveniemitz opened a new pull request #11641: [BEAM-9931] Allow users of AvroIO to specify a custom DatumReader implementation
steveniemitz opened a new pull request #11641:
URL: https://github.com/apache/beam/pull/11641
Similar to PR #11479, it would be useful to be able to explicitly pass a DatumReader factory to AvroIO, and have it use that instead of GenericDatumReader or SpecificDatumReader.
This PR adds `withDatumReaderFactory` to AvroIO and plumbs it through into AvroSource.
R: @iemejia
------------------------
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[GitHub] [beam] iemejia merged pull request #11641: [BEAM-9931] Support custom Avro DatumReaders in AvroIO
Posted by GitBox <gi...@apache.org>.
iemejia merged pull request #11641:
URL: https://github.com/apache/beam/pull/11641
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[GitHub] [beam] steveniemitz commented on pull request #11641: [BEAM-9931] Support custom Avro DatumReaders in AvroIO
Posted by GitBox <gi...@apache.org>.
steveniemitz commented on pull request #11641:
URL: https://github.com/apache/beam/pull/11641#issuecomment-628310808
thanks for the quick reviews!
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[GitHub] [beam] iemejia commented on a change in pull request #11641: [BEAM-9931] Support custom Avro DatumReaders in AvroIO
Posted by GitBox <gi...@apache.org>.
iemejia commented on a change in pull request #11641:
URL: https://github.com/apache/beam/pull/11641#discussion_r424710678
##########
File path: sdks/java/core/src/main/java/org/apache/beam/sdk/io/AvroSource.java
##########
@@ -576,11 +619,16 @@ private static InputStream decodeAsInputStream(byte[] data, String codec) throws
Schema readerSchema =
internOrParseSchemaString(
MoreObjects.firstNonNull(mode.readerSchemaString, writerSchemaString));
- this.reader =
- (mode.type == GenericRecord.class)
- ? new GenericDatumReader<T>(writerSchema, readerSchema)
- : new ReflectDatumReader<T>(writerSchema, readerSchema);
- this.decoder = DecoderFactory.get().binaryDecoder(decodeAsInputStream(data, codec), null);
+
+ this.reader = mode.createReader(writerSchema, readerSchema);
+
+ if (codec.equals(DataFileConstants.NULL_CODEC)) {
+ // Avro can read from a byte[] using a more efficient implementation. If the input is not
+ // compressed, pass the data in directly.
+ this.decoder = DecoderFactory.get().binaryDecoder(data, null);
Review comment:
Neat!
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