Change rewriteOperationName to ContextManager (#25)

lib/trace/context-manager.js

@@ -148,3 +148,15 @@ ContextManager.prototype.createLocalSpan = function(operationName) {
 
     return span;
 };
+
+ContextManager.prototype.rewriteOperationName = function(span, operationName) {
+    this._dictionaryManager.findOperationName(operationName,
+        function(key, value) {
+            if (key == "operationName") {
+                span._operationName = value;
+            }
+            if (key == "operationId") {
+                span._operationId = value;
+            }
+        });
+};

lib/trace/noop-trace-context.js

@@ -54,7 +54,3 @@ NoopTraceContext.prototype.extract = function(contextCarrier) {
 NoopTraceContext.prototype.traceSegment = function() {
   return NOOP_TRACE_SEGMENT;
 };
-
-NoopTraceContext.prototype.rewriteOperationName = function() {
-
-};

lib/trace/trace-context.js

@@ -130,15 +130,3 @@ TraceContext.prototype.extract = function(contextCarrier) {
 TraceContext.prototype.traceSegment = function() {
   return this._traceSegment;
 };
-
-TraceContext.prototype.rewriteOperationName = function(operationName) {
-    this._dictionaryManager.findOperationName(operationName,
-        function(key, value) {
-            if (key == "operationName") {
-                this._span._operationName = value;
-            }
-            if (key == "operationId") {
-                this._span._operationId = value;
-            }
-        });
-};