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/*
* 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.runners.core.construction.PTransformTranslation.FLATTEN_TRANSFORM_URN;
import static org.apache.beam.runners.core.construction.PTransformTranslation.IMPULSE_TRANSFORM_URN;
import static org.apache.beam.runners.direct.TestStreamEvaluatorFactory.DirectTestStreamFactory.DIRECT_TEST_STREAM_URN;
import static org.apache.beam.vendor.guava.v26_0_jre.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.sdk.options.PipelineOptions;
import org.apache.beam.sdk.runners.AppliedPTransform;
import org.apache.beam.sdk.transforms.Impulse;
import org.apache.beam.sdk.transforms.PTransform;
import org.apache.beam.vendor.guava.v26_0_jre.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 Java SDK root transforms. */
public static RootProviderRegistry javaNativeRegistry(
EvaluationContext context, PipelineOptions options) {
return new RootProviderRegistry(
ImmutableMap.<String, RootInputProvider<?, ?, ?>>builder()
.put(IMPULSE_TRANSFORM_URN, new ImpulseEvaluatorFactory.ImpulseRootProvider(context))
.put(
PTransformTranslation.READ_TRANSFORM_URN,
ReadEvaluatorFactory.inputProvider(context, options))
.put(DIRECT_TEST_STREAM_URN, new TestStreamEvaluatorFactory.InputProvider(context))
.put(FLATTEN_TRANSFORM_URN, new EmptyInputProvider())
.build());
}
/** Returns a {@link RootProviderRegistry} that only supports the {@link Impulse} primitive. */
public static RootProviderRegistry impulseRegistry(EvaluationContext context) {
return new RootProviderRegistry(
ImmutableMap.<String, RootInputProvider<?, ?, ?>>builder()
.put(IMPULSE_TRANSFORM_URN, new ImpulseEvaluatorFactory.ImpulseRootProvider(context))
.build());
}
private final Map<String, RootInputProvider<?, ?, ?>> providers;
private RootProviderRegistry(Map<String, RootInputProvider<?, ?, ?>> providers) {
this.providers = providers;
}
public Collection<CommittedBundle<?>> getInitialInputs(
AppliedPTransform<?, ?, ?> transform, int targetParallelism) throws Exception {
String transformUrn = PTransformTranslation.urnForTransform(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);
}
}