package metrics import ( "context" "reflect" "go.opencensus.io/tag" "github.com/filecoin-project/lotus/api" ) func MetricedStorMinerAPI(a api.StorageMiner) api.StorageMiner { var out api.StorageMinerStruct proxy(a, &out.Internal) proxy(a, &out.CommonStruct.Internal) return &out } func MetricedFullAPI(a api.FullNode) api.FullNode { var out api.FullNodeStruct proxy(a, &out.Internal) proxy(a, &out.CommonStruct.Internal) return &out } func MetricedWorkerAPI(a api.Worker) api.Worker { var out api.WorkerStruct proxy(a, &out.Internal) return &out } func MetricedWalletAPI(a api.Wallet) api.Wallet { var out api.WalletStruct proxy(a, &out.Internal) return &out } func MetricedGatewayAPI(a api.Gateway) api.Gateway { var out api.GatewayStruct proxy(a, &out.Internal) return &out } func proxy(in interface{}, out interface{}) { rint := reflect.ValueOf(out).Elem() ra := reflect.ValueOf(in) for f := 0; f < rint.NumField(); f++ { field := rint.Type().Field(f) fn := ra.MethodByName(field.Name) rint.Field(f).Set(reflect.MakeFunc(field.Type, func(args []reflect.Value) (results []reflect.Value) { ctx := args[0].Interface().(context.Context) // upsert function name into context ctx, _ = tag.New(ctx, tag.Upsert(Endpoint, field.Name)) stop := Timer(ctx, APIRequestDuration) defer stop() // pass tagged ctx back into function call args[0] = reflect.ValueOf(ctx) return fn.Call(args) })) } }