micro/meter/wrapper/wrapper.go
Vasiliy Tolstov 2504345815 fixup deps
Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>
2023-10-01 21:28:47 +03:00

240 lines
6.6 KiB
Go

package wrapper
import (
"context"
"fmt"
"time"
"go.unistack.org/micro/v4/client"
"go.unistack.org/micro/v4/meter"
"go.unistack.org/micro/v4/options"
"go.unistack.org/micro/v4/semconv"
"go.unistack.org/micro/v4/server"
)
var (
labelSuccess = "success"
labelFailure = "failure"
labelStatus = "status"
labelEndpoint = "endpoint"
// DefaultSkipEndpoints contains list of endpoints that not evaluted by wrapper
DefaultSkipEndpoints = []string{"Meter.Metrics", "Health.Live", "Health.Ready", "Health.Version"}
)
// Options struct
type Options struct {
Meter meter.Meter
lopts []options.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([]options.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(semconv.ClientRequestInflight, labels...).Inc()
ts := time.Now()
err := w.callFunc(ctx, addr, req, rsp, opts)
te := time.Since(ts)
w.opts.Meter.Counter(semconv.ClientRequestInflight, labels...).Dec()
w.opts.Meter.Summary(semconv.ClientRequestLatencyMicroseconds, labels...).Update(te.Seconds())
w.opts.Meter.Histogram(semconv.ClientRequestDurationSeconds, labels...).Update(te.Seconds())
if err == nil {
labels = append(labels, labelStatus, labelSuccess)
} else {
labels = append(labels, labelStatus, labelFailure)
}
w.opts.Meter.Counter(semconv.ClientRequestTotal, labels...).Inc()
return err
}
func (w *wrapper) Call(ctx context.Context, req client.Request, rsp interface{}, opts ...options.Option) 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(semconv.ClientRequestInflight, labels...).Inc()
ts := time.Now()
err := w.Client.Call(ctx, req, rsp, opts...)
te := time.Since(ts)
w.opts.Meter.Counter(semconv.ClientRequestInflight, labels...).Dec()
w.opts.Meter.Summary(semconv.ClientRequestLatencyMicroseconds, labels...).Update(te.Seconds())
w.opts.Meter.Histogram(semconv.ClientRequestDurationSeconds, labels...).Update(te.Seconds())
if err == nil {
labels = append(labels, labelStatus, labelSuccess)
} else {
labels = append(labels, labelStatus, labelFailure)
}
w.opts.Meter.Counter(semconv.ClientRequestTotal, labels...).Inc()
return err
}
func (w *wrapper) Stream(ctx context.Context, req client.Request, opts ...options.Option) (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(semconv.ClientRequestInflight, labels...).Inc()
ts := time.Now()
stream, err := w.Client.Stream(ctx, req, opts...)
te := time.Since(ts)
w.opts.Meter.Counter(semconv.ClientRequestInflight, labels...).Dec()
w.opts.Meter.Summary(semconv.ClientRequestLatencyMicroseconds, labels...).Update(te.Seconds())
w.opts.Meter.Histogram(semconv.ClientRequestDurationSeconds, labels...).Update(te.Seconds())
if err == nil {
labels = append(labels, labelStatus, labelSuccess)
} else {
labels = append(labels, labelStatus, labelFailure)
}
w.opts.Meter.Counter(semconv.ClientRequestTotal, labels...).Inc()
return stream, err
}
// NewServerHandlerWrapper create new server handler wrapper
func NewServerHandlerWrapper(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(semconv.ServerRequestInflight, labels...).Inc()
ts := time.Now()
err := fn(ctx, req, rsp)
te := time.Since(ts)
w.opts.Meter.Counter(semconv.ServerRequestInflight, labels...).Dec()
w.opts.Meter.Summary(semconv.ServerRequestLatencyMicroseconds, labels...).Update(te.Seconds())
w.opts.Meter.Histogram(semconv.ServerRequestDurationSeconds, labels...).Update(te.Seconds())
if err == nil {
labels = append(labels, labelStatus, labelSuccess)
} else {
labels = append(labels, labelStatus, labelFailure)
}
w.opts.Meter.Counter(semconv.ServerRequestTotal, labels...).Inc()
return err
}
}