New logging system (#319)

* First pass at adding new logging system

* NewLogger

* NewLogger

* WIP

* silly bug fix

* :D removed files

* removed old logging interface

* added tests

* added tests

* Started to add new lines to all f calls

* Added subsystem log types

* Logger improvements

* Further performance improvements

* changes to logger and sublogger creation

* Renamed Logging types

* removed old print statement

* changes based on feedback

* moved sublogger types to own file

* :)

* added console as output type

* added get level command

* added get/set log level via grpc command

* added check for output being empty for migration support

* first pass at log rotation

* added log rotation

* :D derp fixed

* added tests

* changes based on feedback

* changed log type

* comments

* renamed file -> fileSettings

* typo fix

* changes based on feedback

* gofmt ran on additional files

* gofmt ran on additional files

exchanges/gateio/gateio_websocket.go

@@ -52,7 +52,7 @@ func (g *Gateio) WsConnect() error {
 
 	err = g.wsServerSignIn()
 	if err != nil {
-		log.Errorf("%v - authentication failed: %v", g.Name, err)
+		log.Errorf(log.ExchangeSys, "%v - authentication failed: %v\n", g.Name, err)
 	}
 	g.GenerateAuthenticatedSubscriptions()
 	g.GenerateDefaultSubscriptions()
@@ -456,7 +456,7 @@ func (g *Gateio) wsSend(data interface{}) error {
 	g.wsRequestMtx.Lock()
 	defer g.wsRequestMtx.Unlock()
 	if g.Verbose {
-		log.Debugf("%v sending message to websocket %v", g.Name, data)
+		log.Debugf(log.ExchangeSys, "%v sending message to websocket %v", g.Name, data)
 	}
 	// Basic rate limiter
 	time.Sleep(gateioWebsocketRateLimit)

exchanges/gateio/gateio_wrapper.go

@@ -142,7 +142,7 @@ func (g *Gateio) Run() {
 
 	err := g.UpdateTradablePairs(false)
 	if err != nil {
-		log.Errorf("%s failed to update tradable pairs. Err: %s", g.Name, err)
+		log.Errorf(log.ExchangeSys, "%s failed to update tradable pairs. Err: %s", g.Name, err)
 	}
 }