micro/meter/wrapper/wrapper.go

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package wrapper // import "go.unistack.org/micro/v3/meter/wrapper"
import (
"context"
"fmt"
"time"
"go.unistack.org/micro/v3/client"
"go.unistack.org/micro/v3/meter"
"go.unistack.org/micro/v3/server"
)
var (
// ClientRequestDurationSeconds specifies meter metric name
ClientRequestDurationSeconds = "client_request_duration_seconds"
// ClientRequestLatencyMicroseconds specifies meter metric name
ClientRequestLatencyMicroseconds = "client_request_latency_microseconds"
// ClientRequestTotal specifies meter metric name
ClientRequestTotal = "client_request_total"
// ClientRequestInflight specifies meter metric name
ClientRequestInflight = "client_request_inflight"
// ServerRequestDurationSeconds specifies meter metric name
ServerRequestDurationSeconds = "server_request_duration_seconds"
// ServerRequestLatencyMicroseconds specifies meter metric name
ServerRequestLatencyMicroseconds = "server_request_latency_microseconds"
// ServerRequestTotal specifies meter metric name
ServerRequestTotal = "server_request_total"
// ServerRequestInflight specifies meter metric name
ServerRequestInflight = "server_request_inflight"
// PublishMessageDurationSeconds specifies meter metric name
PublishMessageDurationSeconds = "publish_message_duration_seconds"
// PublishMessageLatencyMicroseconds specifies meter metric name
PublishMessageLatencyMicroseconds = "publish_message_latency_microseconds"
// PublishMessageTotal specifies meter metric name
PublishMessageTotal = "publish_message_total"
// PublishMessageInflight specifies meter metric name
PublishMessageInflight = "publish_message_inflight"
// SubscribeMessageDurationSeconds specifies meter metric name
SubscribeMessageDurationSeconds = "subscribe_message_duration_seconds"
// SubscribeMessageLatencyMicroseconds specifies meter metric name
SubscribeMessageLatencyMicroseconds = "subscribe_message_latency_microseconds"
// SubscribeMessageTotal specifies meter metric name
SubscribeMessageTotal = "subscribe_message_total"
// SubscribeMessageInflight specifies meter metric name
SubscribeMessageInflight = "subscribe_message_inflight"
labelSuccess = "success"
labelFailure = "failure"
labelStatus = "status"
labelEndpoint = "endpoint"
// DefaultSkipEndpoints contains list of endpoints that not evaluted by wrapper
DefaultSkipEndpoints = []string{"Meter.Metrics"}
)
// Options struct
type Options struct {
Meter meter.Meter
lopts []meter.Option
SkipEndpoints []string
}
// Option func signature
type Option func(*Options)
// NewOptions creates new Options struct
func NewOptions(opts ...Option) Options {
options := Options{
Meter: meter.DefaultMeter,
lopts: make([]meter.Option, 0, 5),
SkipEndpoints: DefaultSkipEndpoints,
}
for _, o := range opts {
o(&options)
}
return options
}
// ServiceName passes service name to meter label
func ServiceName(name string) Option {
return func(o *Options) {
o.lopts = append(o.lopts, meter.Labels("name", name))
}
}
// ServiceVersion passes service version to meter label
func ServiceVersion(version string) Option {
return func(o *Options) {
o.lopts = append(o.lopts, meter.Labels("version", version))
}
}
// ServiceID passes service id to meter label
func ServiceID(id string) Option {
return func(o *Options) {
o.lopts = append(o.lopts, meter.Labels("id", id))
}
}
// Meter passes meter
func Meter(m meter.Meter) Option {
return func(o *Options) {
o.Meter = m
}
}
// SkipEndoints add endpoint to skip
func SkipEndoints(eps ...string) Option {
return func(o *Options) {
o.SkipEndpoints = append(o.SkipEndpoints, eps...)
}
}
type wrapper struct {
client.Client
callFunc client.CallFunc
opts Options
}
// NewClientWrapper create new client wrapper
func NewClientWrapper(opts ...Option) client.Wrapper {
return func(c client.Client) client.Client {
handler := &wrapper{
opts: NewOptions(opts...),
Client: c,
}
return handler
}
}
// NewCallWrapper create new call wrapper
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())
for _, ep := range w.opts.SkipEndpoints {
if ep == endpoint {
return w.callFunc(ctx, addr, req, rsp, opts)
}
}
labels := make([]string, 0, 4)
labels = append(labels, labelEndpoint, endpoint)
w.opts.Meter.Counter(ClientRequestInflight, labels...).Inc()
ts := time.Now()
err := w.callFunc(ctx, addr, req, rsp, opts)
te := time.Since(ts)
w.opts.Meter.Counter(ClientRequestInflight, labels...).Dec()
w.opts.Meter.Summary(ClientRequestLatencyMicroseconds, labels...).Update(te.Seconds())
w.opts.Meter.Histogram(ClientRequestDurationSeconds, labels...).Update(te.Seconds())
if err == nil {
labels = append(labels, labelStatus, labelSuccess)
} else {
labels = append(labels, labelStatus, labelFailure)
}
w.opts.Meter.Counter(ClientRequestTotal, labels...).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())
for _, ep := range w.opts.SkipEndpoints {
if ep == endpoint {
return w.Client.Call(ctx, req, rsp, opts...)
}
}
labels := make([]string, 0, 4)
labels = append(labels, labelEndpoint, endpoint)
w.opts.Meter.Counter(ClientRequestInflight, labels...).Inc()
ts := time.Now()
err := w.Client.Call(ctx, req, rsp, opts...)
te := time.Since(ts)
w.opts.Meter.Counter(ClientRequestInflight, labels...).Dec()
w.opts.Meter.Summary(ClientRequestLatencyMicroseconds, labels...).Update(te.Seconds())
w.opts.Meter.Histogram(ClientRequestDurationSeconds, labels...).Update(te.Seconds())
if err == nil {
labels = append(labels, labelStatus, labelSuccess)
} else {
labels = append(labels, labelStatus, labelFailure)
}
w.opts.Meter.Counter(ClientRequestTotal, labels...).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())
for _, ep := range w.opts.SkipEndpoints {
if ep == endpoint {
return w.Client.Stream(ctx, req, opts...)
}
}
labels := make([]string, 0, 4)
labels = append(labels, labelEndpoint, endpoint)
w.opts.Meter.Counter(ClientRequestInflight, labels...).Inc()
ts := time.Now()
stream, err := w.Client.Stream(ctx, req, opts...)
te := time.Since(ts)
w.opts.Meter.Counter(ClientRequestInflight, labels...).Dec()
w.opts.Meter.Summary(ClientRequestLatencyMicroseconds, labels...).Update(te.Seconds())
w.opts.Meter.Histogram(ClientRequestDurationSeconds, labels...).Update(te.Seconds())
if err == nil {
labels = append(labels, labelStatus, labelSuccess)
} else {
labels = append(labels, labelStatus, labelFailure)
}
w.opts.Meter.Counter(ClientRequestTotal, labels...).Inc()
return stream, err
}
func (w *wrapper) Publish(ctx context.Context, p client.Message, opts ...client.PublishOption) error {
endpoint := p.Topic()
labels := make([]string, 0, 4)
labels = append(labels, labelEndpoint, endpoint)
w.opts.Meter.Counter(PublishMessageInflight, labels...).Inc()
ts := time.Now()
err := w.Client.Publish(ctx, p, opts...)
te := time.Since(ts)
w.opts.Meter.Counter(PublishMessageInflight, labels...).Dec()
w.opts.Meter.Summary(PublishMessageLatencyMicroseconds, labels...).Update(te.Seconds())
w.opts.Meter.Histogram(PublishMessageDurationSeconds, labels...).Update(te.Seconds())
if err == nil {
labels = append(labels, labelStatus, labelSuccess)
} else {
labels = append(labels, labelStatus, labelFailure)
}
w.opts.Meter.Counter(PublishMessageTotal, labels...).Inc()
return err
}
// NewHandlerWrapper create new server handler wrapper
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.Service() + "." + req.Endpoint()
for _, ep := range w.opts.SkipEndpoints {
if ep == endpoint {
return fn(ctx, req, rsp)
}
}
labels := make([]string, 0, 4)
labels = append(labels, labelEndpoint, endpoint)
w.opts.Meter.Counter(ServerRequestInflight, labels...).Inc()
ts := time.Now()
err := fn(ctx, req, rsp)
te := time.Since(ts)
w.opts.Meter.Counter(ServerRequestInflight, labels...).Dec()
w.opts.Meter.Summary(ServerRequestLatencyMicroseconds, labels...).Update(te.Seconds())
w.opts.Meter.Histogram(ServerRequestDurationSeconds, labels...).Update(te.Seconds())
if err == nil {
labels = append(labels, labelStatus, labelSuccess)
} else {
labels = append(labels, labelStatus, labelFailure)
}
w.opts.Meter.Counter(ServerRequestTotal, labels...).Inc()
return err
}
}
// NewSubscriberWrapper create server subscribe wrapper
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()
labels := make([]string, 0, 4)
labels = append(labels, labelEndpoint, endpoint)
w.opts.Meter.Counter(SubscribeMessageInflight, labels...).Inc()
ts := time.Now()
err := fn(ctx, msg)
te := time.Since(ts)
w.opts.Meter.Counter(SubscribeMessageInflight, labels...).Dec()
w.opts.Meter.Summary(SubscribeMessageLatencyMicroseconds, labels...).Update(te.Seconds())
w.opts.Meter.Histogram(SubscribeMessageDurationSeconds, labels...).Update(te.Seconds())
if err == nil {
labels = append(labels, labelStatus, labelSuccess)
} else {
labels = append(labels, labelStatus, labelFailure)
}
w.opts.Meter.Counter(SubscribeMessageTotal, labels...).Inc()
return err
}
}