com.google.devtools.build.lib.analysis.AspectCompleteEvent.java Source code

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Here is the source code for com.google.devtools.build.lib.analysis.AspectCompleteEvent.java

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// Copyright 2015 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.analysis;

import com.google.common.collect.Iterables;
import com.google.devtools.build.lib.causes.Cause;
import com.google.devtools.build.lib.collect.nestedset.NestedSet;
import com.google.devtools.build.lib.collect.nestedset.NestedSetBuilder;
import com.google.devtools.build.lib.collect.nestedset.Order;
import com.google.devtools.build.lib.skyframe.AspectValue;
import com.google.devtools.build.lib.util.Preconditions;
import com.google.devtools.build.skyframe.SkyValue;

/**
 * This event is fired as soon as a top-level aspect is either built or fails.
 */
public class AspectCompleteEvent implements SkyValue {
    private final AspectValue aspectValue;
    private final NestedSet<Cause> rootCauses;

    private AspectCompleteEvent(AspectValue aspectValue, NestedSet<Cause> rootCauses) {
        this.aspectValue = aspectValue;
        this.rootCauses = (rootCauses == null) ? NestedSetBuilder.<Cause>emptySet(Order.STABLE_ORDER) : rootCauses;
    }

    /**
     * Construct a successful target completion event.
     */
    public static AspectCompleteEvent createSuccessful(AspectValue value) {
        return new AspectCompleteEvent(value, null);
    }

    /**
     * Construct a target completion event for a failed target, with the given non-empty root causes.
     */
    public static AspectCompleteEvent createFailed(AspectValue value, NestedSet<Cause> rootCauses) {
        Preconditions.checkArgument(!Iterables.isEmpty(rootCauses));
        return new AspectCompleteEvent(value, rootCauses);
    }

    /**
     * Returns the target associated with the event.
     */
    public AspectValue getAspectValue() {
        return aspectValue;
    }

    /**
     * Determines whether the target has failed or succeeded.
     */
    public boolean failed() {
        return !rootCauses.isEmpty();
    }

    /** Get the root causes of the target. May be empty. */
    public Iterable<Cause> getRootCauses() {
        return rootCauses;
    }
}