1 files changed, 58 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/skyframe/SchedulerException.java b/src/main/java/com/google/devtools/build/skyframe/SchedulerException.java
new file mode 100644
index 0000000000..a1ade91fa2
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/skyframe/SchedulerException.java
@@ -0,0 +1,58 @@
+// 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.skyframe;
+
+import com.google.common.base.Preconditions;
+
+import javax.annotation.Nullable;
+
+/** Wrapper exception that {@link Runnable}s can throw. */
+class SchedulerException extends RuntimeException {
+  private final SkyKey failedValue;
+  private final ErrorInfo errorInfo;
+
+  private SchedulerException(
+      @Nullable Exception cause, @Nullable ErrorInfo errorInfo, SkyKey failedValue) {
+    super(errorInfo != null ? errorInfo.getException() : cause);
+    this.errorInfo = errorInfo;
+    this.failedValue = Preconditions.checkNotNull(failedValue, errorInfo);
+  }
+
+  /**
+   * Returns a SchedulerException wrapping an expected error, e.g. an error describing an expected
+   * build failure when trying to evaluate the given value, that should cause Skyframe to produce
+   * useful error information to the user.
+   */
+  static SchedulerException ofError(ErrorInfo errorInfo, SkyKey failedValue) {
+    Preconditions.checkNotNull(errorInfo);
+    return new SchedulerException(errorInfo.getException(), errorInfo, failedValue);
+  }
+
+  /**
+   * Returns a SchedulerException wrapping an InterruptedException, e.g. if the user interrupts
+   * the build, that should cause Skyframe to exit as soon as possible.
+   */
+  static SchedulerException ofInterruption(InterruptedException cause, SkyKey failedValue) {
+    return new SchedulerException(cause, null, failedValue);
+  }
+
+  SkyKey getFailedValue() {
+    return failedValue;
+  }
+
+  @Nullable
+  ErrorInfo getErrorInfo() {
+    return errorInfo;
+  }
+}