1 files changed, 75 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/analysis/TargetCompleteEvent.java b/src/main/java/com/google/devtools/build/lib/analysis/TargetCompleteEvent.java
new file mode 100644
index 0000000000..fcfec552ab
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+++ b/src/main/java/com/google/devtools/build/lib/analysis/TargetCompleteEvent.java
@@ -0,0 +1,75 @@
+// Copyright 2014 Google Inc. 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.base.Preconditions;
+import com.google.common.collect.Iterables;
+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.syntax.Label;
+import com.google.devtools.build.skyframe.SkyValue;
+
+/**
+ * This event is fired as soon as a target is either built or fails.
+ */
+public final class TargetCompleteEvent implements SkyValue {
+
+  private final ConfiguredTarget target;
+  private final NestedSet<Label> rootCauses;
+
+  private TargetCompleteEvent(ConfiguredTarget target, NestedSet<Label> rootCauses) {
+    this.target = target;
+    this.rootCauses = (rootCauses == null)
+        ? NestedSetBuilder.<Label>emptySet(Order.STABLE_ORDER)
+        : rootCauses;
+  }
+
+  /**
+   * Construct a successful target completion event.
+   */
+  public static TargetCompleteEvent createSuccessful(ConfiguredTarget ct) {
+    return new TargetCompleteEvent(ct, null);
+  }
+
+  /**
+   * Construct a target completion event for a failed target, with the given non-empty root causes.
+   */
+  public static TargetCompleteEvent createFailed(ConfiguredTarget ct, NestedSet<Label> rootCauses) {
+    Preconditions.checkArgument(!Iterables.isEmpty(rootCauses));
+    return new TargetCompleteEvent(ct, rootCauses);
+  }
+
+  /**
+   * Returns the target associated with the event.
+   */
+  public ConfiguredTarget getTarget() {
+    return target;
+  }
+
+  /**
+   * 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<Label> getRootCauses() {
+    return rootCauses;
+  }
+}