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// Copyright 2019 The Bazel Authors. All rights reserved.
//
// 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 com.google.devtools.build.lib.runtime;
import com.google.devtools.build.lib.actions.Artifact;
import com.google.devtools.build.lib.buildeventstream.ArtifactGroupNamer;
import com.google.devtools.build.lib.buildeventstream.BuildEventStreamProtos.BuildEventId.NamedSetOfFilesId;
import com.google.devtools.build.lib.collect.nestedset.NestedSetView;
import java.util.HashMap;
import java.util.Map;
import javax.annotation.concurrent.GuardedBy;
import javax.annotation.concurrent.ThreadSafe;
/** Conversion of paths to URIs. */
@ThreadSafe
public class CountingArtifactGroupNamer implements ArtifactGroupNamer {
@GuardedBy("this")
private final Map<Object, Long> reportedArtifactNames = new HashMap<>();
@GuardedBy("this")
private long nextArtifactName;
@Override
public NamedSetOfFilesId apply(Object id) {
Long name;
synchronized (this) {
name = reportedArtifactNames.get(id);
}
if (name == null) {
return null;
}
return NamedSetOfFilesId.newBuilder().setId(name.toString()).build();
}
/**
* If the {@link NestedSetView} has no name already, return a new name for it. Return null
* otherwise.
*/
public synchronized String maybeName(NestedSetView<Artifact> view) {
if (reportedArtifactNames.containsKey(view.identifier())) {
return null;
}
Long name = nextArtifactName;
nextArtifactName++;
reportedArtifactNames.put(view.identifier(), name);
return name.toString();
}
}