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// Copyright 2017 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.skyframe;
import com.google.devtools.build.skyframe.SkyFunctionException.ReifiedSkyFunctionException;
import java.util.Set;
import javax.annotation.Nullable;
/** Used by {@link ParallelEvaluator} to produce and consume {@link ErrorInfo} instances. */
public interface ErrorInfoManager {
ErrorInfo fromException(
SkyKey key,
ReifiedSkyFunctionException skyFunctionException,
boolean isTransitivelyTransient);
/**
* Returns the {@link ErrorInfo} to use when there isn't currently one because {@link
* SkyFunction#compute} didn't throw a {@link SkyFunctionException}.
*/
@Nullable
ErrorInfo getErrorInfoToUse(SkyKey skyKey, boolean hasValue, Set<ErrorInfo> childErrorInfos);
/**
* Trivial {@link ErrorInfoManager} implementation whose {@link #fromException} simply uses
* {@link ErrorInfo#fromException} and whose {@link #getErrorInfoToUse} makes an {@link ErrorInfo}
* from the given {@code childErrorInfos}.
*/
static class UseChildErrorInfoIfNecessary implements ErrorInfoManager {
public static final UseChildErrorInfoIfNecessary INSTANCE = new UseChildErrorInfoIfNecessary();
private UseChildErrorInfoIfNecessary() {
}
@Override
public ErrorInfo fromException(
SkyKey key,
ReifiedSkyFunctionException skyFunctionException,
boolean isTransitivelyTransient) {
return ErrorInfo.fromException(skyFunctionException, isTransitivelyTransient);
}
@Override
@Nullable
public ErrorInfo getErrorInfoToUse(
SkyKey skyKey, boolean hasValue, Set<ErrorInfo> childErrorInfos) {
return !childErrorInfos.isEmpty() ? ErrorInfo.fromChildErrors(skyKey, childErrorInfos) : null;
}
}
}
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