1 files changed, 51 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/actions/cache/NullActionCache.java b/src/main/java/com/google/devtools/build/lib/actions/cache/NullActionCache.java
new file mode 100644
index 0000000000..097515075f
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/actions/cache/NullActionCache.java
@@ -0,0 +1,51 @@
+// 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.actions.cache;
+
+import java.io.IOException;
+import java.io.PrintStream;
+
+/**
+ * A no-op action cache that never caches anything.
+ */
+public final class NullActionCache implements ActionCache {
+
+  @Override
+  public void put(String key, Entry entry) {
+  }
+
+  @Override
+  public Entry get(String key) {
+    return null;
+  }
+
+  @Override
+  public void remove(String key) {
+  }
+
+  @Override
+  public Entry createEntry(String key) {
+    return new ActionCache.Entry(key);
+  }
+
+  @Override
+  public long save() throws IOException {
+    return 0;
+  }
+
+  @Override
+  public void dump(PrintStream out) {
+  }
+}