1 files changed, 56 insertions, 0 deletions
diff --git a/impl_core/src/main/java/io/opencensus/implcore/tags/TagsComponentImplBase.java b/impl_core/src/main/java/io/opencensus/implcore/tags/TagsComponentImplBase.java
new file mode 100644
index 00000000..216afdc9
--- /dev/null
+++ b/impl_core/src/main/java/io/opencensus/implcore/tags/TagsComponentImplBase.java
@@ -0,0 +1,56 @@
+/*
+ * 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.tags;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import io.opencensus.implcore.tags.propagation.TagPropagationComponentImpl;
+import io.opencensus.tags.Tagger;
+import io.opencensus.tags.TaggingState;
+import io.opencensus.tags.TagsComponent;
+import io.opencensus.tags.propagation.TagPropagationComponent;
+
+/** Base implementation of {@link TagsComponent}. */
+public class TagsComponentImplBase extends TagsComponent {
+
+  // The TaggingState shared between the TagsComponent, Tagger, and TagPropagationComponent
+  private final CurrentTaggingState state = new CurrentTaggingState();
+
+  private final Tagger tagger = new TaggerImpl(state);
+  private final TagPropagationComponent tagPropagationComponent =
+      new TagPropagationComponentImpl(state);
+
+  @Override
+  public Tagger getTagger() {
+    return tagger;
+  }
+
+  @Override
+  public TagPropagationComponent getTagPropagationComponent() {
+    return tagPropagationComponent;
+  }
+
+  @Override
+  public TaggingState getState() {
+    return state.get();
+  }
+
+  @Override
+  public void setState(TaggingState newState) {
+    state.set(checkNotNull(newState, "newState"));
+  }
+}