| /* |
| * 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.core.construction; |
| |
| import com.google.common.base.MoreObjects; |
| import java.util.HashSet; |
| import java.util.Set; |
| import org.apache.beam.sdk.annotations.Experimental; |
| import org.apache.beam.sdk.annotations.Experimental.Kind; |
| import org.apache.beam.sdk.io.WriteFiles; |
| import org.apache.beam.sdk.runners.AppliedPTransform; |
| import org.apache.beam.sdk.runners.PTransformMatcher; |
| import org.apache.beam.sdk.transforms.DoFn; |
| import org.apache.beam.sdk.transforms.Flatten; |
| import org.apache.beam.sdk.transforms.PTransform; |
| import org.apache.beam.sdk.transforms.ParDo; |
| import org.apache.beam.sdk.transforms.View.CreatePCollectionView; |
| import org.apache.beam.sdk.transforms.ViewFn; |
| import org.apache.beam.sdk.transforms.reflect.DoFnSignature; |
| import org.apache.beam.sdk.transforms.reflect.DoFnSignature.ProcessElementMethod; |
| import org.apache.beam.sdk.transforms.reflect.DoFnSignatures; |
| import org.apache.beam.sdk.util.WindowedValue; |
| import org.apache.beam.sdk.values.PCollection; |
| import org.apache.beam.sdk.values.PValue; |
| |
| /** |
| * A {@link PTransformMatcher} that matches {@link PTransform PTransforms} based on the class of the |
| * transform. |
| * |
| * <p>Once {@link PTransform PTransforms} have URNs, this will be removed and replaced with a |
| * UrnPTransformMatcher. |
| */ |
| @Experimental(Kind.CORE_RUNNERS_ONLY) |
| public class PTransformMatchers { |
| private PTransformMatchers() {} |
| |
| /** |
| * Returns a {@link PTransformMatcher} that matches a {@link PTransform} if the class of the |
| * {@link PTransform} is equal to the {@link Class} provided ot this matcher. |
| */ |
| public static PTransformMatcher classEqualTo(Class<? extends PTransform> clazz) { |
| return new EqualClassPTransformMatcher(clazz); |
| } |
| |
| private static class EqualClassPTransformMatcher implements PTransformMatcher { |
| private final Class<? extends PTransform> clazz; |
| |
| private EqualClassPTransformMatcher(Class<? extends PTransform> clazz) { |
| this.clazz = clazz; |
| } |
| |
| @Override |
| public boolean matches(AppliedPTransform<?, ?, ?> application) { |
| return application.getTransform().getClass().equals(clazz); |
| } |
| |
| @Override |
| public String toString() { |
| return MoreObjects.toStringHelper(EqualClassPTransformMatcher.class) |
| .add("class", clazz) |
| .toString(); |
| } |
| } |
| |
| /** |
| * A {@link PTransformMatcher} that matches a {@link ParDo.SingleOutput} containing a {@link DoFn} |
| * that is splittable, as signified by {@link ProcessElementMethod#isSplittable()}. |
| */ |
| public static PTransformMatcher splittableParDoSingle() { |
| return new PTransformMatcher() { |
| @Override |
| public boolean matches(AppliedPTransform<?, ?, ?> application) { |
| PTransform<?, ?> transform = application.getTransform(); |
| if (transform instanceof ParDo.SingleOutput) { |
| DoFn<?, ?> fn = ((ParDo.SingleOutput<?, ?>) transform).getFn(); |
| DoFnSignature signature = DoFnSignatures.signatureForDoFn(fn); |
| return signature.processElement().isSplittable(); |
| } |
| return false; |
| } |
| |
| @Override |
| public String toString() { |
| return MoreObjects.toStringHelper("SplittableParDoSingleMatcher").toString(); |
| } |
| }; |
| } |
| |
| /** |
| * A {@link PTransformMatcher} that matches a {@link ParDo.SingleOutput} containing a {@link DoFn} |
| * that uses state or timers, as specified by {@link DoFnSignature#usesState()} and {@link |
| * DoFnSignature#usesTimers()}. |
| */ |
| public static PTransformMatcher stateOrTimerParDoSingle() { |
| return new PTransformMatcher() { |
| @Override |
| public boolean matches(AppliedPTransform<?, ?, ?> application) { |
| PTransform<?, ?> transform = application.getTransform(); |
| if (transform instanceof ParDo.SingleOutput) { |
| DoFn<?, ?> fn = ((ParDo.SingleOutput<?, ?>) transform).getFn(); |
| DoFnSignature signature = DoFnSignatures.signatureForDoFn(fn); |
| return signature.usesState() || signature.usesTimers(); |
| } |
| return false; |
| } |
| |
| @Override |
| public String toString() { |
| return MoreObjects.toStringHelper("StateOrTimerParDoSingleMatcher").toString(); |
| } |
| }; |
| } |
| |
| /** |
| * A {@link PTransformMatcher} that matches a {@link ParDo.MultiOutput} containing a {@link DoFn} |
| * that is splittable, as signified by {@link ProcessElementMethod#isSplittable()}. |
| */ |
| public static PTransformMatcher splittableParDoMulti() { |
| return new PTransformMatcher() { |
| @Override |
| public boolean matches(AppliedPTransform<?, ?, ?> application) { |
| PTransform<?, ?> transform = application.getTransform(); |
| if (transform instanceof ParDo.MultiOutput) { |
| DoFn<?, ?> fn = ((ParDo.MultiOutput<?, ?>) transform).getFn(); |
| DoFnSignature signature = DoFnSignatures.signatureForDoFn(fn); |
| return signature.processElement().isSplittable(); |
| } |
| return false; |
| } |
| |
| @Override |
| public String toString() { |
| return MoreObjects.toStringHelper("SplittableParDoMultiMatcher").toString(); |
| } |
| }; |
| } |
| |
| /** |
| * A {@link PTransformMatcher} that matches a {@link ParDo.MultiOutput} containing a {@link DoFn} |
| * that uses state or timers, as specified by {@link DoFnSignature#usesState()} and |
| * {@link DoFnSignature#usesTimers()}. |
| */ |
| public static PTransformMatcher stateOrTimerParDoMulti() { |
| return new PTransformMatcher() { |
| @Override |
| public boolean matches(AppliedPTransform<?, ?, ?> application) { |
| PTransform<?, ?> transform = application.getTransform(); |
| if (transform instanceof ParDo.MultiOutput) { |
| DoFn<?, ?> fn = ((ParDo.MultiOutput<?, ?>) transform).getFn(); |
| DoFnSignature signature = DoFnSignatures.signatureForDoFn(fn); |
| return signature.usesState() || signature.usesTimers(); |
| } |
| return false; |
| } |
| |
| @Override |
| public String toString() { |
| return MoreObjects.toStringHelper("StateOrTimerParDoMultiMatcher").toString(); |
| } |
| }; |
| } |
| |
| /** |
| * A {@link PTransformMatcher} which matches a {@link ParDo.SingleOutput} or {@link |
| * ParDo.MultiOutput} where the {@link DoFn} is of the provided type. |
| */ |
| public static PTransformMatcher parDoWithFnType(final Class<? extends DoFn> fnType) { |
| return new PTransformMatcher() { |
| @Override |
| public boolean matches(AppliedPTransform<?, ?, ?> application) { |
| DoFn<?, ?> fn; |
| if (application.getTransform() instanceof ParDo.SingleOutput) { |
| fn = ((ParDo.SingleOutput) application.getTransform()).getFn(); |
| } else if (application.getTransform() instanceof ParDo.MultiOutput) { |
| fn = ((ParDo.MultiOutput) application.getTransform()).getFn(); |
| } else { |
| return false; |
| } |
| return fnType.equals(fn.getClass()); |
| } |
| |
| @Override |
| public String toString() { |
| return MoreObjects.toStringHelper("ParDoWithFnTypeMatcher") |
| .add("fnType", fnType) |
| .toString(); |
| } |
| }; |
| } |
| |
| public static PTransformMatcher createViewWithViewFn(final Class<? extends ViewFn> viewFnType) { |
| return new PTransformMatcher() { |
| @Override |
| public boolean matches(AppliedPTransform<?, ?, ?> application) { |
| if (!(application.getTransform() instanceof CreatePCollectionView)) { |
| return false; |
| } |
| CreatePCollectionView<?, ?> createView = |
| (CreatePCollectionView<?, ?>) application.getTransform(); |
| ViewFn<Iterable<WindowedValue<?>>, ?> viewFn = createView.getView().getViewFn(); |
| return viewFn.getClass().equals(viewFnType); |
| } |
| }; |
| } |
| |
| /** |
| * A {@link PTransformMatcher} which matches a {@link Flatten.PCollections} which |
| * consumes no input {@link PCollection PCollections}. |
| */ |
| public static PTransformMatcher emptyFlatten() { |
| return new PTransformMatcher() { |
| @Override |
| public boolean matches(AppliedPTransform<?, ?, ?> application) { |
| return (application.getTransform() instanceof Flatten.PCollections) |
| && application.getInputs().isEmpty(); |
| } |
| |
| @Override |
| public String toString() { |
| return MoreObjects.toStringHelper("EmptyFlattenMatcher").toString(); |
| } |
| }; |
| } |
| |
| /** |
| * A {@link PTransformMatcher} which matches a {@link Flatten.PCollections} which |
| * consumes a single input {@link PCollection} multiple times. |
| */ |
| public static PTransformMatcher flattenWithDuplicateInputs() { |
| return new PTransformMatcher() { |
| @Override |
| public boolean matches(AppliedPTransform<?, ?, ?> application) { |
| if (application.getTransform() instanceof Flatten.PCollections) { |
| Set<PValue> observed = new HashSet<>(); |
| for (PValue pvalue : application.getInputs().values()) { |
| boolean firstInstance = observed.add(pvalue); |
| if (!firstInstance) { |
| return true; |
| } |
| } |
| } |
| return false; |
| } |
| |
| @Override |
| public String toString() { |
| return MoreObjects.toStringHelper("FlattenWithDuplicateInputsMatcher").toString(); |
| } |
| }; |
| } |
| |
| public static PTransformMatcher writeWithRunnerDeterminedSharding() { |
| return new PTransformMatcher() { |
| @Override |
| public boolean matches(AppliedPTransform<?, ?, ?> application) { |
| if (application.getTransform() instanceof WriteFiles) { |
| WriteFiles write = (WriteFiles) application.getTransform(); |
| return write.getSharding() == null && write.getNumShards() == null; |
| } |
| return false; |
| } |
| }; |
| } |
| } |