package wrapper import ( "context" "fmt" "time" "github.com/unistack-org/micro/v3/client" "github.com/unistack-org/micro/v3/meter" "github.com/unistack-org/micro/v3/server" ) var ( ClientRequestDurationSeconds = "client_request_duration_seconds" ClientRequestLatencyMicroseconds = "client_request_latency_microseconds" ClientRequestTotal = "client_request_total" ServerRequestDurationSeconds = "server_request_duration_seconds" ServerRequestLatencyMicroseconds = "server_request_latency_microseconds" ServerRequestTotal = "server_request_total" PublishMessageDurationSeconds = "publish_message_duration_seconds" PublishMessageLatencyMicroseconds = "publish_message_latency_microseconds" PublishMessageTotal = "publish_message_total" SubscribeMessageDurationSeconds = "subscribe_message_duration_seconds" SubscribeMessageLatencyMicroseconds = "subscribe_message_latency_microseconds" SubscribeMessageTotal = "subscribe_message_total" labelSuccess = "success" labelFailure = "failure" labelStatus = "status" labelEndpoint = "endpoint" ) type Options struct { Meter meter.Meter lopts []meter.Option } type Option func(*Options) func NewOptions(opts ...Option) Options { options := Options{ Meter: meter.DefaultMeter, lopts: make([]meter.Option, 0, 5), } for _, o := range opts { o(&options) } return options } func ServiceName(name string) Option { return func(o *Options) { o.lopts = append(o.lopts, meter.Label("name", name)) } } func ServiceVersion(version string) Option { return func(o *Options) { o.lopts = append(o.lopts, meter.Label("version", version)) } } func ServiceID(id string) Option { return func(o *Options) { o.lopts = append(o.lopts, meter.Label("id", id)) } } func Meter(m meter.Meter) Option { return func(o *Options) { o.Meter = m } } type wrapper struct { client.Client callFunc client.CallFunc opts Options } func NewClientWrapper(opts ...Option) client.Wrapper { return func(c client.Client) client.Client { handler := &wrapper{ opts: NewOptions(opts...), Client: c, } return handler } } func NewCallWrapper(opts ...Option) client.CallWrapper { return func(fn client.CallFunc) client.CallFunc { handler := &wrapper{ opts: NewOptions(opts...), callFunc: fn, } return handler.CallFunc } } func (w *wrapper) CallFunc(ctx context.Context, addr string, req client.Request, rsp interface{}, opts client.CallOptions) error { endpoint := fmt.Sprintf("%s.%s", req.Service(), req.Endpoint()) ts := time.Now() err := w.callFunc(ctx, addr, req, rsp, opts) te := time.Since(ts) lopts := w.opts.lopts lopts = append(lopts, meter.Label(labelEndpoint, endpoint)) w.opts.Meter.Summary(ClientRequestLatencyMicroseconds, lopts...).Update(float64(te.Seconds())) w.opts.Meter.Histogram(ClientRequestDurationSeconds, lopts...).Update(float64(te.Seconds())) if err == nil { lopts = append(lopts, meter.Label(labelStatus, labelSuccess)) } else { lopts = append(lopts, meter.Label(labelStatus, labelFailure)) } w.opts.Meter.Counter(ClientRequestTotal, lopts...).Inc() return err } func (w *wrapper) Call(ctx context.Context, req client.Request, rsp interface{}, opts ...client.CallOption) error { endpoint := fmt.Sprintf("%s.%s", req.Service(), req.Endpoint()) ts := time.Now() err := w.Client.Call(ctx, req, rsp, opts...) te := time.Since(ts) lopts := w.opts.lopts lopts = append(lopts, meter.Label(labelEndpoint, endpoint)) w.opts.Meter.Summary(ClientRequestLatencyMicroseconds, lopts...).Update(float64(te.Seconds())) w.opts.Meter.Histogram(ClientRequestDurationSeconds, lopts...).Update(float64(te.Seconds())) if err == nil { lopts = append(lopts, meter.Label(labelStatus, labelSuccess)) } else { lopts = append(lopts, meter.Label(labelStatus, labelFailure)) } w.opts.Meter.Counter(ClientRequestTotal, lopts...).Inc() return err } func (w *wrapper) Stream(ctx context.Context, req client.Request, opts ...client.CallOption) (client.Stream, error) { endpoint := fmt.Sprintf("%s.%s", req.Service(), req.Endpoint()) ts := time.Now() stream, err := w.Client.Stream(ctx, req, opts...) te := time.Since(ts) lopts := w.opts.lopts lopts = append(lopts, meter.Label(labelEndpoint, endpoint)) w.opts.Meter.Summary(ClientRequestLatencyMicroseconds, lopts...).Update(float64(te.Seconds())) w.opts.Meter.Histogram(ClientRequestDurationSeconds, lopts...).Update(float64(te.Seconds())) if err == nil { lopts = append(lopts, meter.Label(labelStatus, labelSuccess)) } else { lopts = append(lopts, meter.Label(labelStatus, labelFailure)) } w.opts.Meter.Counter(ClientRequestTotal, lopts...).Inc() return stream, err } func (w *wrapper) Publish(ctx context.Context, p client.Message, opts ...client.PublishOption) error { endpoint := p.Topic() ts := time.Now() err := w.Client.Publish(ctx, p, opts...) te := time.Since(ts) lopts := w.opts.lopts lopts = append(lopts, meter.Label(labelEndpoint, endpoint)) w.opts.Meter.Summary(PublishMessageLatencyMicroseconds, lopts...).Update(float64(te.Seconds())) w.opts.Meter.Histogram(PublishMessageDurationSeconds, lopts...).Update(float64(te.Seconds())) if err == nil { lopts = append(lopts, meter.Label(labelStatus, labelSuccess)) } else { lopts = append(lopts, meter.Label(labelStatus, labelFailure)) } w.opts.Meter.Counter(PublishMessageTotal, lopts...).Inc() return err } func NewHandlerWrapper(opts ...Option) server.HandlerWrapper { handler := &wrapper{ opts: NewOptions(opts...), } return handler.HandlerFunc } func (w *wrapper) HandlerFunc(fn server.HandlerFunc) server.HandlerFunc { return func(ctx context.Context, req server.Request, rsp interface{}) error { endpoint := req.Endpoint() ts := time.Now() err := fn(ctx, req, rsp) te := time.Since(ts) lopts := w.opts.lopts lopts = append(lopts, meter.Label(labelEndpoint, endpoint)) w.opts.Meter.Summary(ServerRequestLatencyMicroseconds, lopts...).Update(float64(te.Seconds())) w.opts.Meter.Histogram(ServerRequestDurationSeconds, lopts...).Update(float64(te.Seconds())) if err == nil { lopts = append(lopts, meter.Label(labelStatus, labelSuccess)) } else { lopts = append(lopts, meter.Label(labelStatus, labelFailure)) } w.opts.Meter.Counter(ServerRequestTotal, lopts...).Inc() return err } } func NewSubscriberWrapper(opts ...Option) server.SubscriberWrapper { handler := &wrapper{ opts: NewOptions(opts...), } return handler.SubscriberFunc } func (w *wrapper) SubscriberFunc(fn server.SubscriberFunc) server.SubscriberFunc { return func(ctx context.Context, msg server.Message) error { endpoint := msg.Topic() ts := time.Now() err := fn(ctx, msg) te := time.Since(ts) lopts := w.opts.lopts lopts = append(lopts, meter.Label(labelEndpoint, endpoint)) w.opts.Meter.Summary(SubscribeMessageLatencyMicroseconds, lopts...).Update(float64(te.Seconds())) w.opts.Meter.Histogram(SubscribeMessageDurationSeconds, lopts...).Update(float64(te.Seconds())) if err == nil { lopts = append(lopts, meter.Label(labelStatus, labelSuccess)) } else { lopts = append(lopts, meter.Label(labelStatus, labelFailure)) } w.opts.Meter.Counter(SubscribeMessageTotal, lopts...).Inc() return err } }