Logger interface and tmLogger impl based on go-kit

log/nop_logger.go

@@ -0,0 +1,18 @@
+package log
+
+type nopLogger struct{}
+
+// NewNopLogger returns a logger that doesn't do anything.
+func NewNopLogger() Logger { return &nopLogger{} }
+
+func (nopLogger) Info(string, ...interface{}) error {
+	return nil
+}
+
+func (nopLogger) Debug(string, ...interface{}) error {
+	return nil
+}
+
+func (nopLogger) Error(string, ...interface{}) error {
+	return nil
+}