Java Code Examples for org.apache.beam.sdk.transforms.Contextful#Fn

The following examples show how to use org.apache.beam.sdk.transforms.Contextful#Fn . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: TypeDescriptors.java    From beam with Apache License 2.0 5 votes vote down vote up 
/** Like {@link #inputOf(ProcessFunction)} but for {@link Contextful.Fn}. */
public static <InputT, OutputT> TypeDescriptor<InputT> inputOf(
    Contextful.Fn<InputT, OutputT> fn) {
  return TypeDescriptors.extractFromTypeParameters(
      fn,
      Contextful.Fn.class,
      new TypeDescriptors.TypeVariableExtractor<Contextful.Fn<InputT, OutputT>, InputT>() {});
}
Example 2
Source File: TypeDescriptors.java    From beam with Apache License 2.0 5 votes vote down vote up 
/** Like {@link #outputOf(ProcessFunction)} but for {@link Contextful.Fn}. */
public static <InputT, OutputT> TypeDescriptor<OutputT> outputOf(
    Contextful.Fn<InputT, OutputT> fn) {
  return TypeDescriptors.extractFromTypeParameters(
      fn,
      Contextful.Fn.class,
      new TypeDescriptors.TypeVariableExtractor<Contextful.Fn<InputT, OutputT>, OutputT>() {});
}
Example 3
Source File: FileIOTest.java    From beam with Apache License 2.0 5 votes vote down vote up 
@Test
@Category(NeedsRunner.class)
public void testFileIoDynamicNaming() throws IOException {
  // Test for BEAM-6407.

  String outputFileName = tmpFolder.newFile().getAbsolutePath();
  PCollectionView<String> outputFileNameView =
      p.apply("outputFileName", Create.of(outputFileName)).apply(View.asSingleton());

  Contextful.Fn<String, FileIO.Write.FileNaming> fileNaming =
      (element, c) ->
          (window, pane, numShards, shardIndex, compression) ->
              c.sideInput(outputFileNameView) + "-" + shardIndex;

  p.apply(Create.of(""))
      .apply(
          "WriteDynamicFilename",
          FileIO.<String, String>writeDynamic()
              .by(SerializableFunctions.constant(""))
              .withDestinationCoder(StringUtf8Coder.of())
              .via(TextIO.sink())
              .withTempDirectory(tmpFolder.newFolder().getAbsolutePath())
              .withNaming(
                  Contextful.of(
                      fileNaming, Requirements.requiresSideInputs(outputFileNameView))));

  // We need to run the TestPipeline with the default options.
  p.run(PipelineOptionsFactory.create()).waitUntilFinish();
  assertTrue(
      "Output file shard 0 exists after pipeline completes",
      new File(outputFileName + "-0").exists());
}