1 files changed, 29 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/buildeventstream/BuildEventWithOrderConstraint.java b/src/main/java/com/google/devtools/build/lib/buildeventstream/BuildEventWithOrderConstraint.java
new file mode 100644
index 0000000000..08cd280b7a
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/buildeventstream/BuildEventWithOrderConstraint.java
@@ -0,0 +1,29 @@
+// Copyright 2016 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.buildeventstream;
+
+import java.util.Collection;
+
+/** Interface for {@link BuildEvent}s with order constraints. */
+public interface BuildEventWithOrderConstraint extends BuildEvent {
+  /**
+   * Specify events that need to come first.
+   *
+   * <p>Specify events by their {@link BuildEventId} that need to be posted on the build event
+   * stream before this event. In doing so, the event promises that the events to be waited for are
+   * already generated, so that the event does not have to be buffered for an extended time.
+   */
+  Collection<BuildEventId> postedAfter();
+}