| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.beam.runners.direct; |
| |
| import static org.apache.beam.vendor.guava.v26_0_jre.com.google.common.base.Preconditions.checkState; |
| import static org.hamcrest.Matchers.equalTo; |
| import static org.hamcrest.Matchers.greaterThan; |
| import static org.hamcrest.Matchers.is; |
| import static org.hamcrest.Matchers.isA; |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertThat; |
| import static org.junit.Assert.fail; |
| |
| import com.fasterxml.jackson.annotation.JsonIgnore; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.io.Serializable; |
| import java.util.Arrays; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.concurrent.ArrayBlockingQueue; |
| import java.util.concurrent.BlockingQueue; |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.Future; |
| import java.util.concurrent.atomic.AtomicInteger; |
| import java.util.concurrent.atomic.AtomicLong; |
| import org.apache.beam.runners.direct.DirectRunner.DirectPipelineResult; |
| import org.apache.beam.sdk.Pipeline; |
| import org.apache.beam.sdk.PipelineResult; |
| import org.apache.beam.sdk.PipelineResult.State; |
| import org.apache.beam.sdk.PipelineRunner; |
| import org.apache.beam.sdk.coders.AtomicCoder; |
| import org.apache.beam.sdk.coders.Coder; |
| import org.apache.beam.sdk.coders.CoderException; |
| import org.apache.beam.sdk.coders.ListCoder; |
| import org.apache.beam.sdk.coders.VarIntCoder; |
| import org.apache.beam.sdk.coders.VarLongCoder; |
| import org.apache.beam.sdk.io.BoundedSource; |
| import org.apache.beam.sdk.io.CountingSource; |
| import org.apache.beam.sdk.io.GenerateSequence; |
| import org.apache.beam.sdk.io.Read; |
| import org.apache.beam.sdk.options.Default; |
| import org.apache.beam.sdk.options.PipelineOptions; |
| import org.apache.beam.sdk.options.PipelineOptionsFactory; |
| import org.apache.beam.sdk.testing.PAssert; |
| import org.apache.beam.sdk.testing.TestPipeline; |
| import org.apache.beam.sdk.transforms.Count; |
| import org.apache.beam.sdk.transforms.Create; |
| import org.apache.beam.sdk.transforms.DoFn; |
| import org.apache.beam.sdk.transforms.Flatten; |
| import org.apache.beam.sdk.transforms.MapElements; |
| import org.apache.beam.sdk.transforms.ParDo; |
| import org.apache.beam.sdk.transforms.SerializableFunction; |
| import org.apache.beam.sdk.transforms.SimpleFunction; |
| import org.apache.beam.sdk.transforms.display.DisplayData; |
| import org.apache.beam.sdk.util.CoderUtils; |
| import org.apache.beam.sdk.util.IllegalMutationException; |
| import org.apache.beam.sdk.values.KV; |
| import org.apache.beam.sdk.values.PCollection; |
| import org.apache.beam.sdk.values.PCollectionList; |
| import org.apache.beam.sdk.values.TypeDescriptor; |
| import org.apache.beam.vendor.guava.v26_0_jre.com.google.common.collect.ImmutableMap; |
| import org.hamcrest.Matchers; |
| import org.joda.time.Duration; |
| import org.junit.Rule; |
| import org.junit.Test; |
| import org.junit.internal.matchers.ThrowableMessageMatcher; |
| import org.junit.rules.ExpectedException; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.JUnit4; |
| |
| /** Tests for basic {@link DirectRunner} functionality. */ |
| @RunWith(JUnit4.class) |
| public class DirectRunnerTest implements Serializable { |
| @Rule public transient ExpectedException thrown = ExpectedException.none(); |
| |
| private Pipeline getPipeline() { |
| PipelineOptions opts = PipelineOptionsFactory.create(); |
| opts.setRunner(DirectRunner.class); |
| |
| return Pipeline.create(opts); |
| } |
| |
| @Test |
| public void defaultRunnerLoaded() { |
| assertThat( |
| DirectRunner.class, |
| Matchers.<Class<? extends PipelineRunner>>equalTo( |
| PipelineOptionsFactory.create().getRunner())); |
| } |
| |
| @Test |
| public void wordCountShouldSucceed() throws Throwable { |
| Pipeline p = getPipeline(); |
| |
| PCollection<KV<String, Long>> counts = |
| p.apply(Create.of("foo", "bar", "foo", "baz", "bar", "foo")) |
| .apply( |
| MapElements.via( |
| new SimpleFunction<String, String>() { |
| @Override |
| public String apply(String input) { |
| return input; |
| } |
| })) |
| .apply(Count.perElement()); |
| PCollection<String> countStrs = |
| counts.apply( |
| MapElements.via( |
| new SimpleFunction<KV<String, Long>, String>() { |
| @Override |
| public String apply(KV<String, Long> input) { |
| return String.format("%s: %s", input.getKey(), input.getValue()); |
| } |
| })); |
| |
| PAssert.that(countStrs).containsInAnyOrder("baz: 1", "bar: 2", "foo: 3"); |
| |
| DirectPipelineResult result = (DirectPipelineResult) p.run(); |
| result.waitUntilFinish(); |
| } |
| |
| private static AtomicInteger changed; |
| |
| @Test |
| public void reusePipelineSucceeds() throws Throwable { |
| Pipeline p = getPipeline(); |
| |
| changed = new AtomicInteger(0); |
| PCollection<KV<String, Long>> counts = |
| p.apply(Create.of("foo", "bar", "foo", "baz", "bar", "foo")) |
| .apply( |
| MapElements.via( |
| new SimpleFunction<String, String>() { |
| @Override |
| public String apply(String input) { |
| return input; |
| } |
| })) |
| .apply(Count.perElement()); |
| PCollection<String> countStrs = |
| counts.apply( |
| MapElements.via( |
| new SimpleFunction<KV<String, Long>, String>() { |
| @Override |
| public String apply(KV<String, Long> input) { |
| return String.format("%s: %s", input.getKey(), input.getValue()); |
| } |
| })); |
| |
| counts.apply( |
| ParDo.of( |
| new DoFn<KV<String, Long>, Void>() { |
| @ProcessElement |
| public void updateChanged(ProcessContext c) { |
| changed.getAndIncrement(); |
| } |
| })); |
| |
| PAssert.that(countStrs).containsInAnyOrder("baz: 1", "bar: 2", "foo: 3"); |
| |
| DirectPipelineResult result = (DirectPipelineResult) p.run(); |
| result.waitUntilFinish(); |
| |
| DirectPipelineResult otherResult = (DirectPipelineResult) p.run(); |
| otherResult.waitUntilFinish(); |
| |
| assertThat("Each element should have been processed twice", changed.get(), equalTo(6)); |
| } |
| |
| @Test |
| public void byteArrayCountShouldSucceed() { |
| Pipeline p = getPipeline(); |
| |
| SerializableFunction<Integer, byte[]> getBytes = |
| input -> { |
| try { |
| return CoderUtils.encodeToByteArray(VarIntCoder.of(), input); |
| } catch (CoderException e) { |
| fail("Unexpected Coder Exception " + e); |
| throw new AssertionError("Unreachable"); |
| } |
| }; |
| TypeDescriptor<byte[]> td = new TypeDescriptor<byte[]>() {}; |
| PCollection<byte[]> foos = |
| p.apply(Create.of(1, 1, 1, 2, 2, 3)).apply(MapElements.into(td).via(getBytes)); |
| PCollection<byte[]> msync = |
| p.apply(Create.of(1, -2, -8, -16)).apply(MapElements.into(td).via(getBytes)); |
| PCollection<byte[]> bytes = PCollectionList.of(foos).and(msync).apply(Flatten.pCollections()); |
| PCollection<KV<byte[], Long>> counts = bytes.apply(Count.perElement()); |
| PCollection<KV<Integer, Long>> countsBackToString = |
| counts.apply( |
| MapElements.via( |
| new SimpleFunction<KV<byte[], Long>, KV<Integer, Long>>() { |
| @Override |
| public KV<Integer, Long> apply(KV<byte[], Long> input) { |
| try { |
| return KV.of( |
| CoderUtils.decodeFromByteArray(VarIntCoder.of(), input.getKey()), |
| input.getValue()); |
| } catch (CoderException e) { |
| fail("Unexpected Coder Exception " + e); |
| throw new AssertionError("Unreachable"); |
| } |
| } |
| })); |
| |
| Map<Integer, Long> expected = |
| ImmutableMap.<Integer, Long>builder() |
| .put(1, 4L) |
| .put(2, 2L) |
| .put(3, 1L) |
| .put(-2, 1L) |
| .put(-8, 1L) |
| .put(-16, 1L) |
| .build(); |
| PAssert.thatMap(countsBackToString).isEqualTo(expected); |
| } |
| |
| @Test |
| public void splitsInputs() { |
| Pipeline p = getPipeline(); |
| PCollection<Long> longs = p.apply(Read.from(MustSplitSource.of(CountingSource.upTo(3)))); |
| |
| PAssert.that(longs).containsInAnyOrder(0L, 1L, 2L); |
| p.run(); |
| } |
| |
| @Test |
| public void cancelShouldStopPipeline() throws Exception { |
| PipelineOptions opts = TestPipeline.testingPipelineOptions(); |
| opts.as(DirectOptions.class).setBlockOnRun(false); |
| opts.setRunner(DirectRunner.class); |
| |
| final Pipeline p = Pipeline.create(opts); |
| p.apply(GenerateSequence.from(0).withRate(1L, Duration.standardSeconds(1))); |
| |
| final BlockingQueue<PipelineResult> resultExchange = new ArrayBlockingQueue<>(1); |
| Runnable cancelRunnable = |
| () -> { |
| try { |
| resultExchange.take().cancel(); |
| } catch (InterruptedException e) { |
| Thread.currentThread().interrupt(); |
| throw new IllegalStateException(e); |
| } catch (IOException e) { |
| throw new IllegalStateException(e); |
| } |
| }; |
| |
| Callable<PipelineResult> runPipelineRunnable = |
| () -> { |
| PipelineResult res = p.run(); |
| try { |
| resultExchange.put(res); |
| } catch (InterruptedException e) { |
| Thread.currentThread().interrupt(); |
| throw new IllegalStateException(e); |
| } |
| return res; |
| }; |
| |
| ExecutorService executor = Executors.newCachedThreadPool(); |
| Future<?> cancelResult = executor.submit(cancelRunnable); |
| Future<PipelineResult> result = executor.submit(runPipelineRunnable); |
| |
| cancelResult.get(); |
| // If cancel doesn't work, this will hang forever |
| result.get().waitUntilFinish(); |
| } |
| |
| @Test |
| public void testWaitUntilFinishTimeout() throws Exception { |
| DirectOptions options = PipelineOptionsFactory.as(DirectOptions.class); |
| options.setBlockOnRun(false); |
| options.setRunner(DirectRunner.class); |
| Pipeline p = Pipeline.create(options); |
| p.apply(Create.of(1L)) |
| .apply( |
| ParDo.of( |
| new DoFn<Long, Long>() { |
| @ProcessElement |
| public void hang(ProcessContext context) throws InterruptedException { |
| // Hangs "forever" |
| Thread.sleep(Long.MAX_VALUE); |
| } |
| })); |
| PipelineResult result = p.run(); |
| // The pipeline should never complete; |
| assertThat(result.getState(), is(State.RUNNING)); |
| // Must time out, otherwise this test will never complete |
| result.waitUntilFinish(Duration.millis(1L)); |
| assertThat(result.getState(), is(State.RUNNING)); |
| } |
| |
| private static final AtomicLong TEARDOWN_CALL = new AtomicLong(-1); |
| |
| @Test |
| public void tearsDownFnsBeforeFinishing() { |
| TEARDOWN_CALL.set(-1); |
| final Pipeline pipeline = getPipeline(); |
| pipeline |
| .apply(Create.of("a")) |
| .apply( |
| ParDo.of( |
| new DoFn<String, String>() { |
| @ProcessElement |
| public void onElement(final ProcessContext ctx) { |
| // no-op |
| } |
| |
| @Teardown |
| public void teardown() { |
| // just to not have a fast execution hiding an issue until we have a shutdown |
| // callback |
| try { |
| Thread.sleep(1000); |
| } catch (final InterruptedException e) { |
| throw new AssertionError(e); |
| } |
| TEARDOWN_CALL.set(System.nanoTime()); |
| } |
| })); |
| final PipelineResult pipelineResult = pipeline.run(); |
| pipelineResult.waitUntilFinish(); |
| |
| final long doneTs = System.nanoTime(); |
| final long tearDownTs = TEARDOWN_CALL.get(); |
| assertThat(tearDownTs, greaterThan(0L)); |
| assertThat(doneTs, greaterThan(tearDownTs)); |
| } |
| |
| @Test |
| public void transformDisplayDataExceptionShouldFail() { |
| DoFn<Integer, Integer> brokenDoFn = |
| new DoFn<Integer, Integer>() { |
| @ProcessElement |
| public void processElement(ProcessContext c) throws Exception {} |
| |
| @Override |
| public void populateDisplayData(DisplayData.Builder builder) { |
| throw new RuntimeException("oh noes!"); |
| } |
| }; |
| |
| Pipeline p = getPipeline(); |
| p.apply(Create.of(1, 2, 3)).apply(ParDo.of(brokenDoFn)); |
| |
| thrown.expectMessage(brokenDoFn.getClass().getName()); |
| thrown.expectCause(ThrowableMessageMatcher.hasMessage(is("oh noes!"))); |
| p.run(); |
| } |
| |
| /** |
| * Tests that a {@link DoFn} that mutates an output with a good equals() fails in the {@link |
| * DirectRunner}. |
| */ |
| @Test |
| public void testMutatingOutputThenOutputDoFnError() throws Exception { |
| Pipeline pipeline = getPipeline(); |
| |
| pipeline |
| .apply(Create.of(42)) |
| .apply( |
| ParDo.of( |
| new DoFn<Integer, List<Integer>>() { |
| @ProcessElement |
| public void processElement(ProcessContext c) { |
| List<Integer> outputList = Arrays.asList(1, 2, 3, 4); |
| c.output(outputList); |
| outputList.set(0, 37); |
| c.output(outputList); |
| } |
| })); |
| |
| thrown.expect(IllegalMutationException.class); |
| thrown.expectMessage("output"); |
| thrown.expectMessage("must not be mutated"); |
| pipeline.run(); |
| } |
| |
| /** |
| * Tests that a {@link DoFn} that mutates an output with a good equals() fails in the {@link |
| * DirectRunner}. |
| */ |
| @Test |
| public void testMutatingOutputWithEnforcementDisabledSucceeds() throws Exception { |
| PipelineOptions options = PipelineOptionsFactory.create(); |
| options.setRunner(DirectRunner.class); |
| options.as(DirectOptions.class).setEnforceImmutability(false); |
| Pipeline pipeline = Pipeline.create(options); |
| |
| pipeline |
| .apply(Create.of(42)) |
| .apply( |
| ParDo.of( |
| new DoFn<Integer, List<Integer>>() { |
| @ProcessElement |
| public void processElement(ProcessContext c) { |
| List<Integer> outputList = Arrays.asList(1, 2, 3, 4); |
| c.output(outputList); |
| outputList.set(0, 37); |
| c.output(outputList); |
| } |
| })); |
| |
| pipeline.run(); |
| } |
| |
| /** |
| * Tests that a {@link DoFn} that mutates an output with a good equals() fails in the {@link |
| * DirectRunner}. |
| */ |
| @Test |
| public void testMutatingOutputThenTerminateDoFnError() throws Exception { |
| Pipeline pipeline = getPipeline(); |
| |
| pipeline |
| .apply(Create.of(42)) |
| .apply( |
| ParDo.of( |
| new DoFn<Integer, List<Integer>>() { |
| @ProcessElement |
| public void processElement(ProcessContext c) { |
| List<Integer> outputList = Arrays.asList(1, 2, 3, 4); |
| c.output(outputList); |
| outputList.set(0, 37); |
| } |
| })); |
| |
| thrown.expect(IllegalMutationException.class); |
| thrown.expectMessage("output"); |
| thrown.expectMessage("must not be mutated"); |
| pipeline.run(); |
| } |
| |
| /** |
| * Tests that a {@link DoFn} that mutates an output with a bad equals() still fails in the {@link |
| * DirectRunner}. |
| */ |
| @Test |
| public void testMutatingOutputCoderDoFnError() throws Exception { |
| Pipeline pipeline = getPipeline(); |
| |
| pipeline |
| .apply(Create.of(42)) |
| .apply( |
| ParDo.of( |
| new DoFn<Integer, byte[]>() { |
| @ProcessElement |
| public void processElement(ProcessContext c) { |
| byte[] outputArray = new byte[] {0x1, 0x2, 0x3}; |
| c.output(outputArray); |
| outputArray[0] = 0xa; |
| c.output(outputArray); |
| } |
| })); |
| |
| thrown.expect(IllegalMutationException.class); |
| thrown.expectMessage("output"); |
| thrown.expectMessage("must not be mutated"); |
| pipeline.run(); |
| } |
| |
| /** |
| * Tests that a {@link DoFn} that mutates its input with a good equals() fails in the {@link |
| * DirectRunner}. |
| */ |
| @Test |
| public void testMutatingInputDoFnError() throws Exception { |
| Pipeline pipeline = getPipeline(); |
| |
| pipeline |
| .apply( |
| Create.of(Arrays.asList(1, 2, 3), Arrays.asList(4, 5, 6)) |
| .withCoder(ListCoder.of(VarIntCoder.of()))) |
| .apply( |
| ParDo.of( |
| new DoFn<List<Integer>, Integer>() { |
| @ProcessElement |
| public void processElement(ProcessContext c) { |
| List<Integer> inputList = c.element(); |
| inputList.set(0, 37); |
| c.output(12); |
| } |
| })); |
| |
| thrown.expect(IllegalMutationException.class); |
| thrown.expectMessage("Input"); |
| thrown.expectMessage("must not be mutated"); |
| pipeline.run(); |
| } |
| |
| /** |
| * Tests that a {@link DoFn} that mutates an input with a bad equals() still fails in the {@link |
| * DirectRunner}. |
| */ |
| @Test |
| public void testMutatingInputCoderDoFnError() throws Exception { |
| Pipeline pipeline = getPipeline(); |
| |
| pipeline |
| .apply(Create.of(new byte[] {0x1, 0x2, 0x3}, new byte[] {0x4, 0x5, 0x6})) |
| .apply( |
| ParDo.of( |
| new DoFn<byte[], Integer>() { |
| @ProcessElement |
| public void processElement(ProcessContext c) { |
| byte[] inputArray = c.element(); |
| inputArray[0] = 0xa; |
| c.output(13); |
| } |
| })); |
| |
| thrown.expect(IllegalMutationException.class); |
| thrown.expectMessage("Input"); |
| thrown.expectMessage("must not be mutated"); |
| pipeline.run(); |
| } |
| |
| @Test |
| public void testUnencodableOutputElement() throws Exception { |
| Pipeline p = getPipeline(); |
| PCollection<Long> pcollection = |
| p.apply(Create.of((Void) null)) |
| .apply( |
| ParDo.of( |
| new DoFn<Void, Long>() { |
| @ProcessElement |
| public void processElement(ProcessContext c) { |
| c.output(null); |
| } |
| })) |
| .setCoder(VarLongCoder.of()); |
| pcollection.apply( |
| ParDo.of( |
| new DoFn<Long, Long>() { |
| @ProcessElement |
| public void unreachable(ProcessContext c) { |
| fail("Pipeline should fail to encode a null Long in VarLongCoder"); |
| } |
| })); |
| |
| thrown.expectCause(isA(CoderException.class)); |
| thrown.expectMessage("cannot encode a null Long"); |
| p.run(); |
| } |
| |
| @Test |
| public void testUnencodableOutputFromBoundedRead() throws Exception { |
| Pipeline p = getPipeline(); |
| p.apply(GenerateSequence.from(0).to(10)).setCoder(new LongNoDecodeCoder()); |
| |
| thrown.expectCause(isA(CoderException.class)); |
| thrown.expectMessage("Cannot decode a long"); |
| p.run(); |
| } |
| |
| @Test |
| public void testUnencodableOutputFromUnboundedRead() { |
| Pipeline p = getPipeline(); |
| p.apply(GenerateSequence.from(0)).setCoder(new LongNoDecodeCoder()); |
| |
| thrown.expectCause(isA(CoderException.class)); |
| thrown.expectMessage("Cannot decode a long"); |
| p.run(); |
| } |
| |
| /** |
| * Tests that {@link DirectRunner#fromOptions(PipelineOptions)} drops {@link PipelineOptions} |
| * marked with {@link JsonIgnore} fields. |
| */ |
| @Test |
| public void testFromOptionsIfIgnoredFieldsGettingDropped() { |
| TestSerializationOfOptions options = |
| PipelineOptionsFactory.fromArgs( |
| "--foo=testValue", "--ignoredField=overridden", "--runner=DirectRunner") |
| .as(TestSerializationOfOptions.class); |
| |
| assertEquals("testValue", options.getFoo()); |
| assertEquals("overridden", options.getIgnoredField()); |
| Pipeline p = Pipeline.create(options); |
| PCollection<Integer> pc = |
| p.apply(Create.of("1")) |
| .apply( |
| ParDo.of( |
| new DoFn<String, Integer>() { |
| @ProcessElement |
| public void processElement(ProcessContext c) { |
| TestSerializationOfOptions options = |
| c.getPipelineOptions().as(TestSerializationOfOptions.class); |
| assertEquals("testValue", options.getFoo()); |
| assertEquals("not overridden", options.getIgnoredField()); |
| c.output(Integer.parseInt(c.element())); |
| } |
| })); |
| PAssert.that(pc).containsInAnyOrder(1); |
| p.run(); |
| } |
| |
| /** |
| * Options for testing if {@link DirectRunner} drops {@link PipelineOptions} marked with {@link |
| * JsonIgnore} fields. |
| */ |
| public interface TestSerializationOfOptions extends PipelineOptions { |
| String getFoo(); |
| |
| void setFoo(String foo); |
| |
| @JsonIgnore |
| @Default.String("not overridden") |
| String getIgnoredField(); |
| |
| void setIgnoredField(String value); |
| } |
| |
| private static class LongNoDecodeCoder extends AtomicCoder<Long> { |
| @Override |
| public void encode(Long value, OutputStream outStream) throws IOException {} |
| |
| @Override |
| public Long decode(InputStream inStream) throws IOException { |
| throw new CoderException("Cannot decode a long"); |
| } |
| } |
| |
| private static class MustSplitSource<T> extends BoundedSource<T> { |
| public static <T> BoundedSource<T> of(BoundedSource<T> underlying) { |
| return new MustSplitSource<>(underlying); |
| } |
| |
| private final BoundedSource<T> underlying; |
| |
| public MustSplitSource(BoundedSource<T> underlying) { |
| this.underlying = underlying; |
| } |
| |
| @Override |
| public List<? extends BoundedSource<T>> split( |
| long desiredBundleSizeBytes, PipelineOptions options) throws Exception { |
| // Must have more than |
| checkState( |
| desiredBundleSizeBytes < getEstimatedSizeBytes(options), |
| "Must split into more than one source"); |
| return underlying.split(desiredBundleSizeBytes, options); |
| } |
| |
| @Override |
| public long getEstimatedSizeBytes(PipelineOptions options) throws Exception { |
| return underlying.getEstimatedSizeBytes(options); |
| } |
| |
| @Override |
| public BoundedReader<T> createReader(PipelineOptions options) throws IOException { |
| throw new IllegalStateException( |
| "The MustSplitSource cannot create a reader without being split first"); |
| } |
| |
| @Override |
| public void validate() { |
| underlying.validate(); |
| } |
| |
| @Override |
| public Coder<T> getOutputCoder() { |
| return underlying.getOutputCoder(); |
| } |
| } |
| } |
