| /* |
| * 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 java.util.ArrayList; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Optional; |
| import java.util.function.Function; |
| import java.util.stream.Collectors; |
| import java.util.stream.Stream; |
| import org.apache.beam.model.pipeline.v1.RunnerApi; |
| import org.apache.beam.vendor.guava.v26_0_jre.com.google.common.collect.ImmutableList; |
| import org.apache.beam.vendor.guava.v26_0_jre.com.google.common.collect.ImmutableMap; |
| import org.apache.beam.vendor.guava.v26_0_jre.com.google.common.collect.Lists; |
| |
| /** |
| * A default artifact resolver. This resolver applies {@link ResolutionFn} in the reversed order |
| * they registered i.e. the function registered later overrides the earlier one if they resolve the |
| * same artifact. |
| */ |
| @SuppressWarnings({ |
| "nullness" // TODO(https://issues.apache.org/jira/browse/BEAM-10402) |
| }) |
| public class DefaultArtifactResolver implements ArtifactResolver { |
| public static final ArtifactResolver INSTANCE = new DefaultArtifactResolver(); |
| |
| // Not threadsafe, access through register() and regesteredFns(). |
| private List<ResolutionFn> fns = |
| Lists.newArrayList( |
| (info) -> { |
| if (BeamUrns.getUrn(RunnerApi.StandardArtifacts.Types.FILE).equals(info.getTypeUrn())) { |
| return Optional.of(ImmutableList.of(info)); |
| } else { |
| return Optional.empty(); |
| } |
| }); |
| |
| private synchronized List<ResolutionFn> regesteredFns() { |
| return ImmutableList.copyOf(fns); |
| } |
| |
| private Function<RunnerApi.ArtifactInformation, Stream<RunnerApi.ArtifactInformation>> resolver = |
| (info) -> { |
| for (ResolutionFn fn : Lists.reverse(regesteredFns())) { |
| Optional<List<RunnerApi.ArtifactInformation>> resolved = fn.resolve(info); |
| if (resolved.isPresent()) { |
| return resolved.get().stream(); |
| } |
| } |
| throw new RuntimeException(String.format("Cannot resolve artifact information: %s", info)); |
| }; |
| |
| @Override |
| public synchronized void register(ResolutionFn fn) { |
| fns.add(fn); |
| } |
| |
| @Override |
| public List<RunnerApi.ArtifactInformation> resolveArtifacts( |
| List<RunnerApi.ArtifactInformation> artifacts) { |
| for (ResolutionFn fn : Lists.reverse(regesteredFns())) { |
| List<RunnerApi.ArtifactInformation> moreResolved = new ArrayList<>(); |
| for (RunnerApi.ArtifactInformation artifact : artifacts) { |
| Optional<List<RunnerApi.ArtifactInformation>> resolved = fn.resolve(artifact); |
| if (resolved.isPresent()) { |
| moreResolved.addAll(resolved.get()); |
| } else { |
| moreResolved.add(artifact); |
| } |
| } |
| artifacts = moreResolved; |
| } |
| return artifacts; |
| } |
| |
| @Override |
| public RunnerApi.Pipeline resolveArtifacts(RunnerApi.Pipeline pipeline) { |
| ImmutableMap.Builder<String, RunnerApi.Environment> environmentMapBuilder = |
| ImmutableMap.builder(); |
| for (Map.Entry<String, RunnerApi.Environment> entry : |
| pipeline.getComponents().getEnvironmentsMap().entrySet()) { |
| List<RunnerApi.ArtifactInformation> resolvedDependencies = |
| entry |
| .getValue() |
| .getDependenciesList() |
| .parallelStream() |
| .flatMap(resolver) |
| .collect(Collectors.toList()); |
| environmentMapBuilder.put( |
| entry.getKey(), |
| entry |
| .getValue() |
| .toBuilder() |
| .clearDependencies() |
| .addAllDependencies(resolvedDependencies) |
| .build()); |
| } |
| return pipeline |
| .toBuilder() |
| .setComponents( |
| pipeline.getComponents().toBuilder().putAllEnvironments(environmentMapBuilder.build())) |
| .build(); |
| } |
| } |