1 files changed, 40 insertions, 0 deletions
diff --git a/impl_core/src/main/java/io/opencensus/implcore/trace/config/TraceConfigImpl.java b/impl_core/src/main/java/io/opencensus/implcore/trace/config/TraceConfigImpl.java
new file mode 100644
index 00000000..1f14226b
--- /dev/null
+++ b/impl_core/src/main/java/io/opencensus/implcore/trace/config/TraceConfigImpl.java
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2017, Google Inc.
+ * 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.trace.config;
+
+import io.opencensus.trace.config.TraceConfig;
+import io.opencensus.trace.config.TraceParams;
+
+/**
+ * Global configuration of the trace service. This allows users to change configs for the default
+ * sampler, maximum events to be kept, etc.
+ */
+public final class TraceConfigImpl extends TraceConfig {
+  // Reads and writes are atomic for reference variables. Use volatile to ensure that these
+  // operations are visible on other CPUs as well.
+  private volatile TraceParams activeTraceParams = TraceParams.DEFAULT;
+
+  /** Constructs a new {@code TraceConfigImpl}. */
+  public TraceConfigImpl() {}
+
+  @Override
+  public TraceParams getActiveTraceParams() {
+    return activeTraceParams;
+  }
+
+  @Override
+  public void updateActiveTraceParams(TraceParams traceParams) {
+    activeTraceParams = traceParams;
+  }
+}