Examples with SetCoder org.apache.beam.sdk.coders.SetCoder used on opensource projects

Example 1 with SetCoder

use of org.apache.beam.sdk.coders.SetCoder in project beam by apache.

the class SdkComponentsTest method translatePipeline.

@Test
public void translatePipeline() {
    BigEndianLongCoder customCoder = BigEndianLongCoder.of();
    PCollection<Long> elems = pipeline.apply(GenerateSequence.from(0L).to(207L));
    PCollection<Long> counted = elems.apply(Count.<Long>globally()).setCoder(customCoder);
    PCollection<Long> windowed = counted.apply(Window.<Long>into(FixedWindows.of(Duration.standardMinutes(7))).triggering(AfterWatermark.pastEndOfWindow().withEarlyFirings(AfterPane.elementCountAtLeast(19))).accumulatingFiredPanes().withAllowedLateness(Duration.standardMinutes(3L)));
    final WindowingStrategy<?, ?> windowedStrategy = windowed.getWindowingStrategy();
    PCollection<KV<String, Long>> keyed = windowed.apply(WithKeys.<String, Long>of("foo"));
    PCollection<KV<String, Iterable<Long>>> grouped = keyed.apply(GroupByKey.<String, Long>create());
    final RunnerApi.Pipeline pipelineProto = SdkComponents.translatePipeline(pipeline);
    pipeline.traverseTopologically(new PipelineVisitor.Defaults() {

        Set<Node> transforms = new HashSet<>();

        Set<PCollection<?>> pcollections = new HashSet<>();

        Set<Equivalence.Wrapper<? extends Coder<?>>> coders = new HashSet<>();

        Set<WindowingStrategy<?, ?>> windowingStrategies = new HashSet<>();

        @Override
        public void leaveCompositeTransform(Node node) {
            if (node.isRootNode()) {
                assertThat("Unexpected number of PTransforms", pipelineProto.getComponents().getTransformsCount(), equalTo(transforms.size()));
                assertThat("Unexpected number of PCollections", pipelineProto.getComponents().getPcollectionsCount(), equalTo(pcollections.size()));
                assertThat("Unexpected number of Coders", pipelineProto.getComponents().getCodersCount(), equalTo(coders.size()));
                assertThat("Unexpected number of Windowing Strategies", pipelineProto.getComponents().getWindowingStrategiesCount(), equalTo(windowingStrategies.size()));
            } else {
                transforms.add(node);
            }
        }

        @Override
        public void visitPrimitiveTransform(Node node) {
            transforms.add(node);
        }

        @Override
        public void visitValue(PValue value, Node producer) {
            if (value instanceof PCollection) {
                PCollection pc = (PCollection) value;
                pcollections.add(pc);
                addCoders(pc.getCoder());
                windowingStrategies.add(pc.getWindowingStrategy());
                addCoders(pc.getWindowingStrategy().getWindowFn().windowCoder());
            }
        }

        private void addCoders(Coder<?> coder) {
            coders.add(Equivalence.<Coder<?>>identity().wrap(coder));
            if (coder instanceof StructuredCoder) {
                for (Coder<?> component : ((StructuredCoder<?>) coder).getComponents()) {
                    addCoders(component);
                }
            }
        }
    });
}