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feat(): add events and metrics systems
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,12 @@ | ||
| package api | ||
|
|
||
| import ( | ||
| "net/http" | ||
|
|
||
| "github.com/ncarlier/reader/pkg/config" | ||
| "github.com/prometheus/client_golang/prometheus/promhttp" | ||
| ) | ||
|
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| func metrics(conf *config.Config) http.Handler { | ||
| return promhttp.Handler() | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
|
|
@@ -57,4 +57,10 @@ var routes = Routes{ | |
| true, | ||
| varz, | ||
| }, | ||
| Route{ | ||
| []string{"GET"}, | ||
| "/metrics", | ||
| true, | ||
| metrics, | ||
| }, | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,14 @@ | ||
| package event | ||
|
|
||
| import ( | ||
| "github.com/ncarlier/reader/pkg/metric" | ||
| "github.com/ncarlier/reader/pkg/model" | ||
| ) | ||
|
|
||
| func init() { | ||
| bus.Subscribe(CreateArticle, func(payload ...interface{}) { | ||
| if article, ok := payload[0].(model.Article); ok { | ||
| metric.IncNewArticlesCounter(article) | ||
| } | ||
| }) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,23 @@ | ||
| package event | ||
|
|
||
| import ( | ||
| "github.com/asaskevich/EventBus" | ||
| ) | ||
|
|
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| var bus = EventBus.New() | ||
|
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||
| const ( | ||
| // CreateUser is the create event on an user | ||
| CreateUser = "user:create" | ||
| // UpdateUser is the update event on an user | ||
| UpdateUser = "user:update" | ||
| // DeleteUser is the delete event on an user | ||
| DeleteUser = "user:delete" | ||
| // CreateArticle is the create event on an article | ||
| CreateArticle = "article:create" | ||
| ) | ||
|
|
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| // Emit trigger an event to events listenners | ||
| func Emit(event string, payload ...interface{}) { | ||
| bus.Publish(event, payload...) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,21 @@ | ||
| package metric | ||
|
|
||
| import ( | ||
| "fmt" | ||
|
|
||
| "github.com/ncarlier/reader/pkg/model" | ||
| "github.com/prometheus/client_golang/prometheus" | ||
| "github.com/prometheus/client_golang/prometheus/promauto" | ||
| ) | ||
|
|
||
| var ( | ||
| createdArticles = promauto.NewCounterVec(prometheus.CounterOpts{ | ||
| Name: "articles_created_total", | ||
| Help: "The total number of created articles by user", | ||
| }, []string{"uid"}) | ||
| ) | ||
|
|
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| // IncNewArticlesCounter increments the counter of new articles | ||
| func IncNewArticlesCounter(article model.Article) { | ||
| createdArticles.With(prometheus.Labels{"uid": fmt.Sprint(article.UserID)}).Inc() | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,23 @@ | ||
| package metric | ||
|
|
||
| import ( | ||
| "expvar" | ||
| "runtime" | ||
| "time" | ||
| ) | ||
|
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| var startTime = time.Now().UTC() | ||
|
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| func goroutines() interface{} { | ||
| return runtime.NumGoroutine() | ||
| } | ||
|
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| func uptime() interface{} { | ||
| uptime := time.Since(startTime) | ||
| return int64(uptime) | ||
| } | ||
|
|
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| func init() { | ||
| expvar.Publish("goroutines", expvar.Func(goroutines)) | ||
| expvar.Publish("uptime", expvar.Func(uptime)) | ||
| } |
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