1 files changed, 37 insertions, 0 deletions
diff --git a/src/mongo/logger/encoder.h b/src/mongo/logger/encoder.h
new file mode 100644
index 00000000000..f79e0d3a74e
--- /dev/null
+++ b/src/mongo/logger/encoder.h
@@ -0,0 +1,37 @@
+/*    Copyright 2013 10gen 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.
+ */
+
+#pragma once
+
+#include <iosfwd>
+
+namespace mongo {
+namespace logger {
+
+    /**
+     * Interface for objects that encode Events to std::ostreams.
+     *
+     * Most appender implementations write to streams, and Encoders represent the process of
+     * encoding events into streams.
+     */
+    template <typename Event>
+    class Encoder {
+    public:
+        virtual ~Encoder() {}
+        virtual std::ostream& encode(const Event& event, std::ostream& os) = 0;
+    };
+
+}  // namespace logger
+}  // nnamspace mongo