1 files changed, 45 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/skyframe/EvaluationSuccessStateSupplier.java b/src/main/java/com/google/devtools/build/skyframe/EvaluationSuccessStateSupplier.java
new file mode 100644
index 0000000000..f4c320ca6e
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/skyframe/EvaluationSuccessStateSupplier.java
@@ -0,0 +1,45 @@
+// 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.skyframe;
+
+import com.google.common.base.Supplier;
+import com.google.devtools.build.skyframe.EvaluationProgressReceiver.EvaluationSuccessState;
+
+/**
+ * Supplier of {@link EvaluationSuccessState} that crashes if its contained {@link NodeEntry} throws
+ * an {@link InterruptedException} on value retrieval.
+ */
+class EvaluationSuccessStateSupplier implements Supplier<EvaluationSuccessState> {
+  private final NodeEntry state;
+
+  EvaluationSuccessStateSupplier(NodeEntry state) {
+    this.state = state;
+  }
+
+  @Override
+  public EvaluationSuccessState get() {
+    try {
+      return state.getValue() != null
+          ? EvaluationSuccessState.SUCCESS
+          : EvaluationSuccessState.FAILURE;
+    } catch (InterruptedException e) {
+      throw new IllegalStateException(
+          "Graph implementations in which value retrieval can block should not be used in "
+              + "frameworks that use the value in EvaluationProgressReceiver, since that could "
+              + "result in significant slowdowns: "
+              + state,
+          e);
+    }
+  }
+}