/*
* Copyright 2017 the original author or authors.
*
* Licensed 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.gradle.api.internal.artifacts.ivyservice.resolveengine.artifact;
import org.gradle.api.Action;
import org.gradle.api.artifacts.ResolvedArtifact;
import org.gradle.internal.operations.BuildOperationExecutor;
import org.gradle.internal.operations.BuildOperationQueue;
import org.gradle.internal.operations.RunnableBuildOperation;
import java.io.File;
/**
* A wrapper that prepares artifacts in parallel when visiting the delegate.
* This is done by collecting all artifacts to prepare and/or visit in a first step.
* The collected artifacts are prepared in parallel and subsequently visited in sequence.
*/
public abstract class ParallelResolveArtifactSet {
private static final EmptySet EMPTY = new EmptySet();
public abstract void visit(ArtifactVisitor visitor);
public static ParallelResolveArtifactSet wrap(ResolvedArtifactSet artifacts, BuildOperationExecutor buildOperationProcessor) {
if (artifacts == ResolvedArtifactSet.EMPTY) {
return EMPTY;
}
return new VisitingSet(artifacts, buildOperationProcessor);
}
private static class EmptySet extends ParallelResolveArtifactSet {
@Override
public void visit(ArtifactVisitor visitor) {
}
}
private static class VisitingSet extends ParallelResolveArtifactSet {
private final ResolvedArtifactSet artifacts;
private final BuildOperationExecutor buildOperationProcessor;
VisitingSet(ResolvedArtifactSet artifacts, BuildOperationExecutor buildOperationProcessor) {
this.artifacts = artifacts;
this.buildOperationProcessor = buildOperationProcessor;
}
public void visit(final ArtifactVisitor visitor) {
// Start preparing the result
StartVisitAction visitAction = new StartVisitAction(visitor);
buildOperationProcessor.runAll(visitAction);
// Now visit the result in order
visitAction.result.visit(visitor);
}
private static class AsyncArtifactListenerAdapter implements ResolvedArtifactSet.AsyncArtifactListener {
private final ArtifactVisitor visitor;
AsyncArtifactListenerAdapter(ArtifactVisitor visitor) {
this.visitor = visitor;
}
@Override
public void artifactAvailable(ResolvedArtifact artifact) {
// Don't care, collect the artifacts later (in the correct order)
}
@Override
public boolean requireArtifactFiles() {
return visitor.requireArtifactFiles();
}
@Override
public boolean includeFileDependencies() {
return visitor.includeFiles();
}
@Override
public void fileAvailable(File file) {
// Don't care, collect the files later (in the correct order)
}
}
private class StartVisitAction implements Action<BuildOperationQueue<RunnableBuildOperation>> {
private final ArtifactVisitor visitor;
ResolvedArtifactSet.Completion result;
StartVisitAction(ArtifactVisitor visitor) {
this.visitor = visitor;
}
@Override
public void execute(BuildOperationQueue<RunnableBuildOperation> buildOperationQueue) {
result = artifacts.startVisit(buildOperationQueue, new AsyncArtifactListenerAdapter(visitor));
}
}
}
}