add event manager temp worker count info to statistics metrics

go.mod

@@ -7,7 +7,7 @@ require (
 	github.com/RoaringBitmap/roaring v1.6.0
 	github.com/afocus/captcha v0.0.0-20191010092841-4bd1f21c8868
 	github.com/alimy/mir/v4 v4.0.0
-	github.com/alimy/tryst v0.9.0
+	github.com/alimy/tryst v0.9.1
 	github.com/aliyun/aliyun-oss-go-sdk v2.2.9+incompatible
 	github.com/allegro/bigcache/v3 v3.1.0
 	github.com/bufbuild/connect-go v1.10.0

go.sum

@@ -127,8 +127,8 @@ github.com/alexflint/go-filemutex v0.0.0-20171022225611-72bdc8eae2ae/go.mod h1:C
 github.com/alexflint/go-filemutex v1.1.0/go.mod h1:7P4iRhttt/nUvUOrYIhcpMzv2G6CY9UnI16Z+UJqRyk=
 github.com/alimy/mir/v4 v4.0.0 h1:MzGfmoLjjvR69jbZEmpKJO3tUuqB0RGRv1UWPbtukBg=
 github.com/alimy/mir/v4 v4.0.0/go.mod h1:d58dBvw2KImcVbAUANrciEV/of0arMNsI9c/5UNCMMc=
-github.com/alimy/tryst v0.9.0 h1:+pKAeNMD9XDn3Z76LjzCcHacim7SXFGVwJf38i7eW60=
-github.com/alimy/tryst v0.9.0/go.mod h1:6FcqEImav7S62em+p+MODh+stt/UPp23HobUOK3XwFY=
+github.com/alimy/tryst v0.9.1 h1:EnsvdS/kvUJ7IybrjFdBMGkAiHRTXx0bScdZSUhZb4w=
+github.com/alimy/tryst v0.9.1/go.mod h1:6FcqEImav7S62em+p+MODh+stt/UPp23HobUOK3XwFY=
 github.com/aliyun/aliyun-oss-go-sdk v2.2.9+incompatible h1:Sg/2xHwDrioHpxTN6WMiwbXTpUEinBpHsN7mG21Rc2k=
 github.com/aliyun/aliyun-oss-go-sdk v2.2.9+incompatible/go.mod h1:T/Aws4fEfogEE9v+HPhhw+CntffsBHJ8nXQCwKr0/g8=
 github.com/allegro/bigcache/v3 v3.1.0 h1:H2Vp8VOvxcrB91o86fUSVJFqeuz8kpyyB02eH3bSzwk=

internal/core/cache.go

@@ -116,3 +116,8 @@ type WebCache interface {
 	ExistUnreadMsgCountResp(uid int64) bool
 	PutHistoryMaxOnline(newScore int) (int, error)
 }
+
+type MetricCache interface {
+	SetEventTempWorkerCount(name string, count int)
+	GetEventTempWorkerCount(name string) int
+}

internal/events/events.go

@@ -11,6 +11,7 @@ import (
 	"github.com/alimy/tryst/pool"
 	"github.com/robfig/cron/v3"
 	"github.com/rocboss/paopao-ce/internal/conf"
+	"github.com/rocboss/paopao-ce/internal/metrics/statistics"
 	"github.com/sirupsen/logrus"
 )
 
@@ -103,7 +104,10 @@ func initEventManager() {
 	} else {
 		opts = append(opts, pool.MaxRequestTempBufOpt(10))
 	}
-	opts = append(opts, pool.MaxTickCountOpt(s.MaxTickCount), pool.TickWaitTimeOpt(s.TickWaitTime))
+	opts = append(opts,
+		pool.MaxTickCountOpt(s.MaxTickCount),
+		pool.TickWaitTimeOpt(s.TickWaitTime),
+		pool.WorkerHookOpt(NewEventWorkerHook("default", statistics.NewMetricCache())))
 	_defaultEventManager = NewEventManager(func(req Event, err error) {
 		if err != nil {
 			logrus.Errorf("handle event[%s] occurs error: %s", req.Name(), err)

internal/events/events_tryst.go

@@ -7,6 +7,7 @@ package events
 import (
 	"github.com/alimy/tryst/event"
 	"github.com/alimy/tryst/pool"
+	"github.com/rocboss/paopao-ce/internal/core"
 )
 
 type Event = event.Event
@@ -17,6 +18,11 @@ type EventManager interface {
 	OnEvent(event Event)
 }
 
+type simpleWorkerHook struct {
+	name  string
+	cache core.MetricCache
+}
+
 type simpleEventManager struct {
 	em event.EventManager
 }
@@ -33,8 +39,23 @@ func (s *simpleEventManager) OnEvent(event Event) {
 	s.em.OnEvent(event)
 }
 
+func (h *simpleWorkerHook) OnJoin(count int) {
+	h.cache.SetEventTempWorkerCount(h.name, count)
+}
+
+func (h *simpleWorkerHook) OnLeave(count int) {
+	h.cache.SetEventTempWorkerCount(h.name, count)
+}
+
 func NewEventManager(fn pool.RespFn[Event], opts ...pool.Option) EventManager {
 	return &simpleEventManager{
 		em: event.NewEventManager(fn, opts...),
 	}
 }
+
+func NewEventWorkerHook(name string, mc core.MetricCache) pool.WorkerHook {
+	return &simpleWorkerHook{
+		name:  name,
+		cache: mc,
+	}
+}

internal/metrics/prometheus/metrics.go

@@ -13,8 +13,10 @@ import (
 
 type metrics struct {
 	siteInfo *prometheus.GaugeVec
+	runtime  *prometheus.GaugeVec
 	ds       core.DataService
 	wc       core.WebCache
+	mc       core.MetricCache
 }
 
 func (m *metrics) updateSiteInfo() {
@@ -31,13 +33,21 @@ func (m *metrics) updateSiteInfo() {
 	}
 }
 
+func (m *metrics) updateRuntime() {
+	m.runtime.With(prometheus.Labels{"name": "default"}).Set(float64(m.mc.GetEventTempWorkerCount("default")))
+}
+
 func (m *metrics) onUpdate() {
 	logrus.Debugf("update promethues metrics job running")
 	m.updateSiteInfo()
+	m.updateRuntime()
 }
 
-func newMetrics(reg prometheus.Registerer, ds core.DataService, wc core.WebCache) *metrics {
+func newMetrics(reg prometheus.Registerer, ds core.DataService, wc core.WebCache, mc core.MetricCache) *metrics {
 	m := &metrics{
+		ds: ds,
+		wc: wc,
+		mc: mc,
 		siteInfo: prometheus.NewGaugeVec(
 			prometheus.GaugeOpts{
 				Namespace: "paopao",
@@ -49,9 +59,18 @@ func newMetrics(reg prometheus.Registerer, ds core.DataService, wc core.WebCache
 				// metric name
 				"name",
 			}),
-		ds: ds,
-		wc: wc,
+		runtime: prometheus.NewGaugeVec(
+			prometheus.GaugeOpts{
+				Namespace: "runtime",
+				Subsystem: "event_manager",
+				Name:      "temp_worker_count",
+				Help:      "runtime's event manager temp worker count info",
+			},
+			[]string{
+				// metric name
+				"name",
+			}),
 	}
-	reg.MustRegister(m.siteInfo)
+	reg.MustRegister(m.siteInfo, m.runtime)
 	return m
 }

internal/metrics/prometheus/prometheus.go

@@ -27,7 +27,7 @@ func scheduleJobs(metrics *metrics) {
 	logrus.Debug("shedule prometheus metrics update jobs complete")
 }
 
-func NewHandler(ds core.DataService, wc core.WebCache) http.Handler {
+func NewHandler(ds core.DataService, wc core.WebCache, mc core.MetricCache) http.Handler {
 	// Create non-global registry.
 	registry := prometheus.NewRegistry()
 	// Add go runtime metrics and process collectors.
@@ -35,7 +35,7 @@ func NewHandler(ds core.DataService, wc core.WebCache) http.Handler {
 		collectors.NewGoCollector(),
 		collectors.NewProcessCollector(collectors.ProcessCollectorOpts{}),
 	)
-	metrics := newMetrics(registry, ds, wc)
+	metrics := newMetrics(registry, ds, wc, mc)
 	scheduleJobs(metrics)
 	return promhttp.HandlerFor(registry, promhttp.HandlerOpts{EnableOpenMetrics: true})
 }

internal/metrics/statistics/cache.go

@@ -0,0 +1,38 @@
+// Copyright 2023 ROC. All rights reserved.
+// Use of this source code is governed by a MIT style
+// license that can be found in the LICENSE file.
+
+package statistics
+
+import (
+	"sync"
+
+	"github.com/rocboss/paopao-ce/internal/core"
+)
+
+var (
+	_metricCache     core.MetricCache
+	_onceMetricCache sync.Once
+)
+
+type metricCache struct {
+	eventTempWorkerCount map[string]int
+}
+
+func (m *metricCache) SetEventTempWorkerCount(name string, count int) {
+	// 直接赋值，不需要加锁，因为这仅仅是一个统计信息
+	m.eventTempWorkerCount[name] = count
+}
+
+func (m *metricCache) GetEventTempWorkerCount(name string) int {
+	return m.eventTempWorkerCount[name]
+}
+
+func NewMetricCache() core.MetricCache {
+	_onceMetricCache.Do(func() {
+		_metricCache = &metricCache{
+			eventTempWorkerCount: make(map[string]int),
+		}
+	})
+	return _metricCache
+}

internal/service/metrics.go

@@ -14,6 +14,7 @@ import (
 	"github.com/rocboss/paopao-ce/internal/dao"
 	"github.com/rocboss/paopao-ce/internal/dao/cache"
 	"github.com/rocboss/paopao-ce/internal/metrics/prometheus"
+	"github.com/rocboss/paopao-ce/internal/metrics/statistics"
 )
 
 var (
@@ -44,9 +45,9 @@ func (s *metricsService) String() string {
 func newMetricsService() Service {
 	addr := conf.MetricsServerSetting.HttpIp + ":" + conf.MetricsServerSetting.HttpPort
 	server := httpServers.from(addr, func() *httpServer {
-		ds, wc := dao.DataService(), cache.NewWebCache()
+		ds, wc, mc := dao.DataService(), cache.NewWebCache(), statistics.NewMetricCache()
 		mux := http.NewServeMux()
-		mux.Handle("/metrics", prometheus.NewHandler(ds, wc))
+		mux.Handle("/metrics", prometheus.NewHandler(ds, wc, mc))
 		return &httpServer{
 			baseServer: newBaseServe(),
 			server: &http.Server{