1 files changed, 38 insertions, 0 deletions
diff --git a/impl_core/src/main/java/io/opencensus/implcore/internal/NoopScope.java b/impl_core/src/main/java/io/opencensus/implcore/internal/NoopScope.java
new file mode 100644
index 00000000..51efe894
--- /dev/null
+++ b/impl_core/src/main/java/io/opencensus/implcore/internal/NoopScope.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2017, OpenCensus Authors
+ *
+ * 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 io.opencensus.implcore.internal;
+
+import io.opencensus.common.Scope;
+
+/** A {@link Scope} that does nothing when it is created or closed. */
+public final class NoopScope implements Scope {
+  private static final Scope INSTANCE = new NoopScope();
+
+  private NoopScope() {}
+
+  /**
+   * Returns a {@code NoopScope}.
+   *
+   * @return a {@code NoopScope}.
+   */
+  public static Scope getInstance() {
+    return INSTANCE;
+  }
+
+  @Override
+  public void close() {}
+}