| /* |
| * 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.portable; |
| |
| import static org.apache.beam.runners.core.construction.PTransformTranslation.FLATTEN_TRANSFORM_URN; |
| import static org.apache.beam.runners.core.construction.PTransformTranslation.IMPULSE_TRANSFORM_URN; |
| import static org.apache.beam.vendor.guava.v20_0.com.google.common.base.Preconditions.checkNotNull; |
| |
| import java.util.Collection; |
| import java.util.Map; |
| import org.apache.beam.runners.core.construction.PTransformTranslation; |
| import org.apache.beam.runners.core.construction.graph.PipelineNode.PTransformNode; |
| import org.apache.beam.sdk.transforms.PTransform; |
| import org.apache.beam.vendor.guava.v20_0.com.google.common.collect.ImmutableMap; |
| |
| /** |
| * A {@link RootInputProvider} that delegates to primitive {@link RootInputProvider} implementations |
| * based on the type of {@link PTransform} of the application. |
| */ |
| class RootProviderRegistry { |
| |
| /** |
| * Returns a {@link RootProviderRegistry} that supports the {@link Impulse} and {@link Flatten} |
| * primitives. |
| */ |
| static RootProviderRegistry javaPortableRegistry(BundleFactory bundleFactory) { |
| return new RootProviderRegistry( |
| ImmutableMap.<String, RootInputProvider<?>>builder() |
| .put( |
| IMPULSE_TRANSFORM_URN, |
| new ImpulseEvaluatorFactory.ImpulseRootProvider(bundleFactory)) |
| .put(FLATTEN_TRANSFORM_URN, new EmptyInputProvider()) |
| .build()); |
| } |
| |
| private final Map<String, RootInputProvider<?>> providers; |
| |
| private RootProviderRegistry(Map<String, RootInputProvider<?>> providers) { |
| this.providers = providers; |
| } |
| |
| public Collection<CommittedBundle<?>> getInitialInputs( |
| PTransformNode transform, int targetParallelism) throws Exception { |
| String transformUrn = PTransformTranslation.urnForTransformOrNull(transform.getTransform()); |
| RootInputProvider provider = |
| checkNotNull( |
| providers.get(transformUrn), |
| "Tried to get a %s for a transform \"%s\", but there is no such provider", |
| RootInputProvider.class.getSimpleName(), |
| transformUrn); |
| return provider.getInitialInputs(transform, targetParallelism); |
| } |
| } |