add base metrics component to measure some server status and add measure online user logic

auto/api/v1/relax.go

@@ -23,15 +23,27 @@ type Relax interface {
 	mustEmbedUnimplementedRelaxServant()
 }
 
+type RelaxChain interface {
+	ChainGetUnreadMsgCount() gin.HandlersChain
+
+	mustEmbedUnimplementedRelaxChain()
+}
+
 // RegisterRelaxServant register Relax servant to gin
-func RegisterRelaxServant(e *gin.Engine, s Relax) {
+func RegisterRelaxServant(e *gin.Engine, s Relax, m ...RelaxChain) {
+	var cc RelaxChain
+	if len(m) > 0 {
+		cc = m[0]
+	} else {
+		cc = &UnimplementedRelaxChain{}
+	}
 	router := e.Group("v1")
 	// use chain for router
 	middlewares := s.Chain()
 	router.Use(middlewares...)
 
 	// register routes info to router
-	router.Handle("GET", "/user/msgcount/unread", func(c *gin.Context) {
+	router.Handle("GET", "/user/msgcount/unread", append(cc.ChainGetUnreadMsgCount(), func(c *gin.Context) {
 		select {
 		case <-c.Request.Context().Done():
 			return
@@ -49,7 +61,7 @@ func RegisterRelaxServant(e *gin.Engine, s Relax) {
 		}
 		var rv _render_ = resp
 		rv.Render(c)
-	})
+	})...)
 }
 
 // UnimplementedRelaxServant can be embedded to have forward compatible implementations.
@@ -64,3 +76,12 @@ func (UnimplementedRelaxServant) GetUnreadMsgCount(req *web.GetUnreadMsgCountReq
 }
 
 func (UnimplementedRelaxServant) mustEmbedUnimplementedRelaxServant() {}
+
+// UnimplementedRelaxChain can be embedded to have forward compatible implementations.
+type UnimplementedRelaxChain struct{}
+
+func (b *UnimplementedRelaxChain) ChainGetUnreadMsgCount() gin.HandlersChain {
+	return nil
+}
+
+func (b *UnimplementedRelaxChain) mustEmbedUnimplementedRelaxChain() {}

internal/conf/cache.go

@@ -8,6 +8,7 @@ import (
 	"fmt"
 
 	"github.com/alimy/tryst/cache"
+	"github.com/rocboss/paopao-ce/pkg/types"
 )
 
 const (
@@ -16,12 +17,21 @@ const (
 
 // 以下包含一些在cache中会用到的key的前缀
 const (
+	PrefixNewestTweets    = "paopao:newesttweets:"
+	PrefixHotsTweets      = "paopao:hotstweets:"
+	PrefixFollowingTweets = "paopao:followingtweets:"
 	PrefixUserTweets      = "paopao:usertweets:"
+	PrefixUnreadmsg       = "paopao:unreadmsg:"
+	PrefixOnlineUser      = "paopao:onlineuser:"
 )
 
 // 以下包含一些在cache中会用到的池化后的key
 var (
+	KeyNewestTweets    cache.KeyPool[int]
+	KeyHotsTweets      cache.KeyPool[int]
+	KeyFollowingTweets cache.KeyPool[string]
 	KeyUnreadMsg       cache.KeyPool[int64]
+	KeyOnlineUser      cache.KeyPool[int64]
 )
 
 func initCacheKeyPool() {
@@ -29,7 +39,25 @@ func initCacheKeyPool() {
 	if poolSize < CacheSetting.KeyPoolSize {
 		poolSize = CacheSetting.KeyPoolSize
 	}
-	KeyUnreadMsg = cache.MustKeyPool[int64](poolSize, func(key int64) string {
-		return fmt.Sprintf("paopao:unreadmsg:%d", key)
+	KeyNewestTweets = intKeyPool[int](poolSize, PrefixNewestTweets)
+	KeyHotsTweets = intKeyPool[int](poolSize, PrefixHotsTweets)
+	KeyFollowingTweets = strKeyPool(poolSize, PrefixFollowingTweets)
+	KeyUnreadMsg = intKeyPool[int64](poolSize, PrefixUnreadmsg)
+	KeyOnlineUser = intKeyPool[int64](poolSize, PrefixOnlineUser)
+}
+
+func strKeyPool(size int, prefix string) cache.KeyPool[string] {
+	return cache.MustKeyPool(size, func(key string) string {
+		return fmt.Sprintf("%s%s", prefix, key)
 	})
 }
+
+func intKeyPool[T types.Integer](size int, prefix string) cache.KeyPool[T] {
+	return cache.MustKeyPool[T](size, intKey[T](prefix))
+}
+
+func intKey[T types.Integer](prefix string) func(T) string {
+	return func(key T) string {
+		return fmt.Sprintf("%s%d", prefix, key)
+	}
+}

internal/conf/conf.go

@@ -37,6 +37,7 @@ var (
 	AppSetting              *appConf
 	CacheSetting            *cacheConf
 	EventManagerSetting     *eventManagerConf
+	MetricManagerSetting    *metricManagerConf
 	CacheIndexSetting       *cacheIndexConf
 	SimpleCacheIndexSetting *simpleCacheIndexConf
 	BigCacheIndexSetting    *bigCacheIndexConf
@@ -73,6 +74,7 @@ func setupSetting(suite []string, noDefault bool) error {
 		"App":               &AppSetting,
 		"Cache":             &CacheSetting,
 		"EventManager":      &EventManagerSetting,
+		"MetricManager":     &MetricManagerSetting,
 		"PprofServer":       &PprofServerSetting,
 		"WebServer":         &WebServerSetting,
 		"AdminServer":       &AdminServerSetting,
@@ -121,6 +123,7 @@ func setupSetting(suite []string, noDefault bool) error {
 
 	CacheSetting.CientSideCacheExpire *= time.Second
 	EventManagerSetting.TickWaitTime *= time.Second
+	MetricManagerSetting.TickWaitTime *= time.Second
 	JWTSetting.Expire *= time.Second
 	SimpleCacheIndexSetting.CheckTickDuration *= time.Second
 	SimpleCacheIndexSetting.ExpireTickDuration *= time.Second

internal/conf/config.yaml

@@ -10,12 +10,19 @@ Cache:
   CientSideCacheExpire: 60    # 客户端缓存过期时间 默认60s
   UnreadMsgExpire: 60         # 未读消息过期时间，单位秒， 默认60s
   UserTweetsExpire: 60        # 获取用户推文列表过期时间，单位秒， 默认60s
+  OnlineUserExpire: 300       # 标记在线用户 过期时间，单位秒， 默认300s
 EventManager: # 事件管理器的配置参数
   MinWorker: 64               # 最小后台工作者, 设置范围[5, ++], 默认64
   MaxEventBuf: 128            # 最大log缓存条数, 设置范围[10, ++], 默认128
   MaxTempEventBuf: 256        # 最大log缓存条数, 设置范围[10, ++], 默认256
   MaxTickCount: 60            # 最大的循环周期, 设置范围[60, ++], 默认60
   TickWaitTime: 1             # 一个周期的等待时间，单位：秒 默认1s
+MetricManager: # 指标监控管理器的配置参数
+  MinWorker: 32               # 最小后台工作者, 设置范围[5, ++], 默认32
+  MaxEventBuf: 128            # 最大log缓存条数, 设置范围[10, ++], 默认128
+  MaxTempEventBuf: 256        # 最大log缓存条数, 设置范围[10, ++], 默认256
+  MaxTickCount: 60            # 最大的循环周期, 设置范围[60, ++], 默认60
+  TickWaitTime: 1             # 一个周期的等待时间，单位：秒 默认1s
 Features:
   Default: []
 WebServer: # Web服务

internal/conf/setting.go

@@ -101,6 +101,7 @@ type cacheConf struct {
 	CientSideCacheExpire time.Duration
 	UnreadMsgExpire      int64
 	UserTweetsExpire     int64
+	OnlineUserExpire     int64
 }
 
 type eventManagerConf struct {
@@ -111,6 +112,14 @@ type eventManagerConf struct {
 	TickWaitTime    time.Duration
 }
 
+type metricManagerConf struct {
+	MinWorker       int
+	MaxEventBuf     int
+	MaxTempEventBuf int
+	MaxTickCount    int
+	TickWaitTime    time.Duration
+}
+
 type cacheIndexConf struct {
 	MaxUpdateQPS int
 	MinWorker    int

internal/core/cache.go

@@ -101,6 +101,7 @@ type RedisCache interface {
 type AppCache interface {
 	Get(key string) ([]byte, error)
 	Set(key string, data []byte, ex int64) error
+	SetNx(key string, data []byte, ex int64) error
 	Delete(key ...string) error
 	DelAny(pattern string) error
 	Exist(key string) bool

internal/dao/cache/web.go

@@ -39,12 +39,21 @@ func (s *appCache) Get(key string) ([]byte, error) {
 }
 
 func (s *appCache) Set(key string, data []byte, ex int64) error {
-	return s.c.Do(context.Background(), s.c.B().Set().
-		Key(key).
-		Value(utils.String(data)).
-		ExSeconds(ex).
-		Build()).
-		Error()
+	ctx := context.Background()
+	cmd := s.c.B().Set().Key(key).Value(utils.String(data))
+	if ex > 0 {
+		return s.c.Do(ctx, cmd.ExSeconds(ex).Build()).Error()
+	}
+	return s.c.Do(ctx, cmd.Build()).Error()
+}
+
+func (s *appCache) SetNx(key string, data []byte, ex int64) error {
+	ctx := context.Background()
+	cmd := s.c.B().Set().Key(key).Value(utils.String(data)).Nx()
+	if ex > 0 {
+		return s.c.Do(ctx, cmd.ExSeconds(ex).Build()).Error()
+	}
+	return s.c.Do(ctx, cmd.Build()).Error()
 }
 
 func (s *appCache) Delete(keys ...string) (err error) {

internal/events/events.go

@@ -8,13 +8,68 @@ import (
 	"sync"
 
 	"github.com/alimy/tryst/cfg"
+	"github.com/alimy/tryst/pool"
+	"github.com/robfig/cron/v3"
+	"github.com/rocboss/paopao-ce/internal/conf"
 	"github.com/sirupsen/logrus"
 )
 
 var (
+	_defaultEventManager EventManager
+	_defaultJobManager   JobManager
 	_onceInitial         sync.Once
 )
 
+func StartEventManager() {
+	_defaultEventManager.Start()
+}
+
+func StopEventManager() {
+	_defaultEventManager.Stop()
+}
+
+// OnEvent push event to gorotine pool then handled automatic.
+func OnEvent(event Event) {
+	_defaultEventManager.OnEvent(event)
+}
+
+func StartJobManager() {
+	_defaultJobManager.Start()
+}
+
+func StopJobManager() {
+	_defaultJobManager.Stop()
+}
+
+// NewJob create new Job instance
+func NewJob(s cron.Schedule, fn JobFn) Job {
+	return &simpleJob{
+		Schedule: s,
+		Job:      fn,
+	}
+}
+
+// RemoveJob an entry from being run in the future.
+func RemoveJob(id EntryID) {
+	_defaultJobManager.Remove(id)
+}
+
+// ScheduleJob adds a Job to the Cron to be run on the given schedule.
+// The job is wrapped with the configured Chain.
+func ScheduleJob(job Job) EntryID {
+	return _defaultJobManager.Schedule(job)
+}
+
+// Schedule adds a Job to the Cron to be run on the given schedule.
+// The job is wrapped with the configured Chain.
+func Schedule(s cron.Schedule, fn JobFn) EntryID {
+	job := &simpleJob{
+		Schedule: s,
+		Job:      fn,
+	}
+	return _defaultJobManager.Schedule(job)
+}
+
 func Initial() {
 	_onceInitial.Do(func() {
 		initEventManager()
@@ -24,3 +79,34 @@ func Initial() {
 		}
 	})
 }
+
+func initJobManager() {
+	_defaultJobManager = NewJobManager()
+	StartJobManager()
+}
+
+func initEventManager() {
+	var opts []pool.Option
+	s := conf.EventManagerSetting
+	if s.MinWorker > 5 {
+		opts = append(opts, pool.MinWorkerOpt(s.MinWorker))
+	} else {
+		opts = append(opts, pool.MinWorkerOpt(5))
+	}
+	if s.MaxEventBuf > 10 {
+		opts = append(opts, pool.MaxRequestBufOpt(s.MaxEventBuf))
+	} else {
+		opts = append(opts, pool.MaxRequestBufOpt(10))
+	}
+	if s.MaxTempEventBuf > 10 {
+		opts = append(opts, pool.MaxRequestTempBufOpt(s.MaxTempEventBuf))
+	} else {
+		opts = append(opts, pool.MaxRequestTempBufOpt(10))
+	}
+	opts = append(opts, pool.MaxTickCountOpt(s.MaxTickCount), pool.TickWaitTimeOpt(s.TickWaitTime))
+	_defaultEventManager = NewEventManager(func(req Event, err error) {
+		if err != nil {
+			logrus.Errorf("handle event[%s] occurs error: %s", req.Name(), err)
+		}
+	}, opts...)
+}

internal/events/events_tryst.go

@@ -0,0 +1,40 @@
+// 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 events
+
+import (
+	"github.com/alimy/tryst/event"
+	"github.com/alimy/tryst/pool"
+)
+
+type Event = event.Event
+
+type EventManager interface {
+	Start()
+	Stop()
+	OnEvent(event Event)
+}
+
+type simpleEventManager struct {
+	em event.EventManager
+}
+
+func (s *simpleEventManager) Start() {
+	s.em.Start()
+}
+
+func (s *simpleEventManager) Stop() {
+	s.em.Stop()
+}
+
+func (s *simpleEventManager) OnEvent(event Event) {
+	s.em.OnEvent(event)
+}
+
+func NewEventManager(fn pool.RespFn[Event], opts ...pool.Option) EventManager {
+	return &simpleEventManager{
+		em: event.NewEventManager(fn, opts...),
+	}
+}

internal/events/jobs.go

@@ -8,10 +8,6 @@ import (
 	"github.com/robfig/cron/v3"
 )
 
-var (
-	_defaultJobManager JobManager = (*jobManager)(nil)
-)
-
 type (
 	EntryID = cron.EntryID
 )
@@ -65,46 +61,8 @@ func (j *jobManager) Schedule(job Job) EntryID {
 	return j.m.Schedule(job, job)
 }
 
-func initJobManager() {
-	_defaultJobManager = &jobManager{
+func NewJobManager() JobManager {
+	return &jobManager{
 		m: cron.New(),
 	}
-	StartJobManager()
-}
-
-func StartJobManager() {
-	_defaultJobManager.Start()
-}
-
-func StopJobManager() {
-	_defaultJobManager.Stop()
-}
-
-// NewJob create new Job instance
-func NewJob(s cron.Schedule, fn JobFn) Job {
-	return &simpleJob{
-		Schedule: s,
-		Job:      fn,
-	}
-}
-
-// RemoveJob an entry from being run in the future.
-func RemoveJob(id EntryID) {
-	_defaultJobManager.Remove(id)
-}
-
-// ScheduleJob adds a Job to the Cron to be run on the given schedule.
-// The job is wrapped with the configured Chain.
-func ScheduleJob(job Job) EntryID {
-	return _defaultJobManager.Schedule(job)
-}
-
-// Schedule adds a Job to the Cron to be run on the given schedule.
-// The job is wrapped with the configured Chain.
-func Schedule(s cron.Schedule, fn JobFn) EntryID {
-	job := &simpleJob{
-		Schedule: s,
-		Job:      fn,
-	}
-	return _defaultJobManager.Schedule(job)
 }

internal/internal.go

@@ -6,6 +6,7 @@ package internal
 
 import (
 	"github.com/rocboss/paopao-ce/internal/events"
+	"github.com/rocboss/paopao-ce/internal/metrics"
 	"github.com/rocboss/paopao-ce/internal/migration"
 )
 
@@ -14,4 +15,6 @@ func Initial() {
 	migration.Run()
 	// event manager system initialize
 	events.Initial()
+	// metric manager system initialize
+	metrics.Initial()
 }

internal/metrics/metrics.go

@@ -2,9 +2,11 @@
 // Use of this source code is governed by a MIT style
 // license that can be found in the LICENSE file.
 
-package events
+package metrics
 
 import (
+	"sync"
+
 	"github.com/alimy/tryst/event"
 	"github.com/alimy/tryst/pool"
 	"github.com/rocboss/paopao-ce/internal/conf"
@@ -12,10 +14,40 @@ import (
 )
 
 var (
-	_defaultEventManager event.EventManager
+	_defaultMetricManager event.EventManager
+	_onceInitial          sync.Once
 )
 
-func initEventManager() {
+type Metric = event.Event
+
+type BaseMetric = event.UnimplementedEvent
+
+type MetricManager interface {
+	Start()
+	Stop()
+	OnMeasure(metric Metric)
+}
+
+func StartMetricManager() {
+	_defaultMetricManager.Start()
+}
+
+func StopMetricManager() {
+	_defaultMetricManager.Stop()
+}
+
+// OnMeasure push Metric to gorotine pool then handled automatic.
+func OnMeasure(metric Metric) {
+	_defaultMetricManager.OnEvent(metric)
+}
+
+func Initial() {
+	_onceInitial.Do(func() {
+		initMetricManager()
+	})
+}
+
+func initMetricManager() {
 	var opts []pool.Option
 	s := conf.EventManagerSetting
 	if s.MinWorker > 5 {
@@ -34,22 +66,9 @@ func initEventManager() {
 		opts = append(opts, pool.MaxRequestTempBufOpt(10))
 	}
 	opts = append(opts, pool.MaxTickCountOpt(s.MaxTickCount), pool.TickWaitTimeOpt(s.TickWaitTime))
-	_defaultEventManager = event.NewEventManager(func(req event.Event, err error) {
+	_defaultMetricManager = event.NewEventManager(func(req Metric, err error) {
 		if err != nil {
 			logrus.Errorf("handle event[%s] occurs error: %s", req.Name(), err)
 		}
 	}, opts...)
 }
-
-func StartEventManager() {
-	_defaultEventManager.Start()
-}
-
-func StopEventManager() {
-	_defaultEventManager.Stop()
-}
-
-// OnEvent push event to gorotine pool then handled automatic.
-func OnEvent(event event.Event) {
-	_defaultEventManager.OnEvent(event)
-}

internal/metrics/metrics_tryst.go

@@ -0,0 +1,32 @@
+// 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 metrics
+
+import (
+	"github.com/alimy/tryst/event"
+	"github.com/alimy/tryst/pool"
+)
+
+type simpleMetricManager struct {
+	mm event.EventManager
+}
+
+func (s *simpleMetricManager) Start() {
+	s.mm.Start()
+}
+
+func (s *simpleMetricManager) Stop() {
+	s.mm.Stop()
+}
+
+func (s *simpleMetricManager) OnMeasure(metric Metric) {
+	s.mm.OnEvent(metric)
+}
+
+func NewMetricManager(fn pool.RespFn[Metric], opts ...pool.Option) MetricManager {
+	return &simpleMetricManager{
+		mm: event.NewEventManager(fn, opts...),
+	}
+}

internal/model/web/audit.go

@@ -13,6 +13,7 @@ const (
 
 const (
 	AuditHookCtxKey  = "audit_ctx_key"
+	OnlineUserCtxKey = "online_user_ctx_key"
 )
 
 type AuditStyle uint8

internal/servants/base/events.go

@@ -99,7 +99,7 @@ func (p *ExpireRespEvent) Name() string {
 	return "servants.base.ExpireRespEvent"
 }
 
-func (p *ExpireRespEvent) Action() (err error) {
+func (p *ExpireRespEvent) Action() error {
 	return p.ac.Delete(p.keys...)
 }
 
@@ -107,7 +107,7 @@ func (p *ExpireAnyRespEvent) Name() string {
 	return "servants.base.ExpireAnyRespEvent"
 }
 
-func (p *ExpireAnyRespEvent) Action() (err error) {
+func (p *ExpireAnyRespEvent) Action() error {
 	return p.ac.DelAny(p.pattern)
 }
 

internal/servants/chain/chain.go

@@ -9,16 +9,19 @@ import (
 
 	"github.com/rocboss/paopao-ce/internal/core"
 	"github.com/rocboss/paopao-ce/internal/dao"
+	"github.com/rocboss/paopao-ce/internal/dao/cache"
 )
 
 var (
 	_ums     core.UserManageService
+	_ac      core.AppCache
 	_onceUms sync.Once
 )
 
 func userManageService() core.UserManageService {
 	_onceUms.Do(func() {
 		_ums = dao.DataService()
+		_ac = cache.NewAppCache()
 	})
 	return _ums
 }

internal/servants/chain/measure.go

@@ -0,0 +1,21 @@
+// 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 chain
+
+import (
+	"github.com/gin-gonic/gin"
+	"github.com/rocboss/paopao-ce/internal/servants/base"
+)
+
+func OnlineUserMeasure() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		// 此midleware后面是真正的http handlder，让handler先执行
+		c.Next()
+		// 更新用户在线状态
+		if uid, ok := base.UserIdFrom(c); ok {
+			OnUserOnlineMetric(_ac, uid)
+		}
+	}
+}

internal/servants/chain/metrics.go

@@ -0,0 +1,36 @@
+// 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 chain
+
+import (
+	"github.com/rocboss/paopao-ce/internal/conf"
+	"github.com/rocboss/paopao-ce/internal/core"
+	"github.com/rocboss/paopao-ce/internal/metrics"
+)
+
+type OnlineUserMetric struct {
+	metrics.BaseMetric
+	ac     core.AppCache
+	uid    int64
+	expire int64
+}
+
+func OnUserOnlineMetric(ac core.AppCache, uid int64) {
+	metrics.OnMeasure(&OnlineUserMetric{
+		ac:     ac,
+		uid:    uid,
+		expire: conf.CacheSetting.OnlineUserExpire,
+	})
+}
+
+func (m *OnlineUserMetric) Name() string {
+	return "OnlineUserMetric"
+}
+
+func (m *OnlineUserMetric) Action() (err error) {
+	// 暂时仅做标记，不存储其他相关信息
+	m.ac.Set(conf.KeyOnlineUser.Get(m.uid), []byte{}, m.expire)
+	return
+}

internal/servants/web/relax.go

@@ -26,6 +26,14 @@ type relaxSrv struct {
 	wc core.WebCache
 }
 
+type relaxChain struct {
+	api.UnimplementedRelaxChain
+}
+
+func (s *relaxChain) ChainGetUnreadMsgCount() gin.HandlersChain {
+	return gin.HandlersChain{chain.OnlineUserMeasure()}
+}
+
 func (s *relaxSrv) Chain() gin.HandlersChain {
 	return gin.HandlersChain{chain.JwtSurely()}
 }
@@ -50,3 +58,7 @@ func newRelaxSrv(s *base.DaoServant, wc core.WebCache) api.Relax {
 		wc:         wc,
 	}
 }
+
+func newRelaxChain() api.RelaxChain {
+	return &relaxChain{}
+}

internal/servants/web/web.go

@@ -34,7 +34,7 @@ func RouteWeb(e *gin.Engine) {
 	// aways register servants
 	api.RegisterAdminServant(e, newAdminSrv(ds))
 	api.RegisterCoreServant(e, newCoreSrv(ds, _oss, _wc))
-	api.RegisterRelaxServant(e, newRelaxSrv(ds, _wc))
+	api.RegisterRelaxServant(e, newRelaxSrv(ds, _wc), newRelaxChain())
 	api.RegisterLooseServant(e, newLooseSrv(ds, _ac))
 	api.RegisterPrivServant(e, newPrivSrv(ds, _oss), newPrivChain())
 	api.RegisterPubServant(e, newPubSrv(ds))

mirc/web/v1/relax.go

@@ -16,5 +16,5 @@ type Relax struct {
 	Group `mir:"v1"`
 
 	// GetUnreadMsgCount 获取当前用户未读消息数量
-	GetUnreadMsgCount func(Get, web.GetUnreadMsgCountReq) web.GetUnreadMsgCountResp `mir:"/user/msgcount/unread"`
+	GetUnreadMsgCount func(Get, Chain, web.GetUnreadMsgCountReq) web.GetUnreadMsgCountResp `mir:"/user/msgcount/unread"`
 }

pkg/types/types.go

@@ -23,3 +23,7 @@ type Boxes[T any] interface {
 	Box(t T)
 	Unbox() T
 }
+
+type Integer interface {
+	~int8 | ~int16 | ~int32 | ~int64 | ~uint8 | ~uint16 | ~uint32 | ~uint64 | ~int | ~uint
+}