Queue: Add monitoring

modules/queue/manager.go

@@ -0,0 +1,211 @@
+// Copyright 2019 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package queue
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"reflect"
+	"sort"
+	"sync"
+	"time"
+)
+
+var manager *Manager
+
+// Manager is a queue manager
+type Manager struct {
+	mutex sync.Mutex
+
+	counter int64
+	Queues  map[int64]*Description
+}
+
+// Description represents a working queue inheriting from Gitea.
+type Description struct {
+	mutex           sync.Mutex
+	QID             int64
+	Queue           Queue
+	Type            Type
+	Name            string
+	Configuration   interface{}
+	ExemplarType    string
+	addWorkers      func(number int, timeout time.Duration) context.CancelFunc
+	numberOfWorkers func() int
+	counter         int64
+	PoolWorkers     map[int64]*PoolWorkers
+}
+
+// DescriptionList implements the sort.Interface
+type DescriptionList []*Description
+
+// PoolWorkers represents a working queue inheriting from Gitea.
+type PoolWorkers struct {
+	PID        int64
+	Workers    int
+	Start      time.Time
+	Timeout    time.Time
+	HasTimeout bool
+	Cancel     context.CancelFunc
+}
+
+// PoolWorkersList implements the sort.Interface
+type PoolWorkersList []*PoolWorkers
+
+func init() {
+	_ = GetManager()
+}
+
+// GetManager returns a Manager and initializes one as singleton if there's none yet
+func GetManager() *Manager {
+	if manager == nil {
+		manager = &Manager{
+			Queues: make(map[int64]*Description),
+		}
+	}
+	return manager
+}
+
+// Add adds a queue to this manager
+func (m *Manager) Add(queue Queue,
+	t Type,
+	configuration,
+	exemplar interface{},
+	addWorkers func(number int, timeout time.Duration) context.CancelFunc,
+	numberOfWorkers func() int) int64 {
+
+	cfg, _ := json.Marshal(configuration)
+	desc := &Description{
+		Queue:           queue,
+		Type:            t,
+		Configuration:   string(cfg),
+		ExemplarType:    reflect.TypeOf(exemplar).String(),
+		PoolWorkers:     make(map[int64]*PoolWorkers),
+		addWorkers:      addWorkers,
+		numberOfWorkers: numberOfWorkers,
+	}
+	m.mutex.Lock()
+	m.counter++
+	desc.QID = m.counter
+	desc.Name = fmt.Sprintf("queue-%d", desc.QID)
+	if named, ok := queue.(Named); ok {
+		desc.Name = named.Name()
+	}
+	m.Queues[desc.QID] = desc
+	m.mutex.Unlock()
+	return desc.QID
+}
+
+// Remove a queue from the Manager
+func (m *Manager) Remove(qid int64) {
+	m.mutex.Lock()
+	delete(m.Queues, qid)
+	m.mutex.Unlock()
+}
+
+// GetDescription by qid
+func (m *Manager) GetDescription(qid int64) *Description {
+	m.mutex.Lock()
+	defer m.mutex.Unlock()
+	return m.Queues[qid]
+}
+
+// Descriptions returns the queue descriptions
+func (m *Manager) Descriptions() []*Description {
+	m.mutex.Lock()
+	descs := make([]*Description, 0, len(m.Queues))
+	for _, desc := range m.Queues {
+		descs = append(descs, desc)
+	}
+	m.mutex.Unlock()
+	sort.Sort(DescriptionList(descs))
+	return descs
+}
+
+// Workers returns the poolworkers
+func (q *Description) Workers() []*PoolWorkers {
+	q.mutex.Lock()
+	workers := make([]*PoolWorkers, 0, len(q.PoolWorkers))
+	for _, worker := range q.PoolWorkers {
+		workers = append(workers, worker)
+	}
+	q.mutex.Unlock()
+	sort.Sort(PoolWorkersList(workers))
+	return workers
+}
+
+// RegisterWorkers registers workers to this queue
+func (q *Description) RegisterWorkers(number int, start time.Time, hasTimeout bool, timeout time.Time, cancel context.CancelFunc) int64 {
+	q.mutex.Lock()
+	defer q.mutex.Unlock()
+	q.counter++
+	q.PoolWorkers[q.counter] = &PoolWorkers{
+		PID:        q.counter,
+		Workers:    number,
+		Start:      start,
+		Timeout:    timeout,
+		HasTimeout: hasTimeout,
+		Cancel:     cancel,
+	}
+	return q.counter
+}
+
+// CancelWorkers cancels pooled workers with pid
+func (q *Description) CancelWorkers(pid int64) {
+	q.mutex.Lock()
+	pw, ok := q.PoolWorkers[pid]
+	q.mutex.Unlock()
+	if !ok {
+		return
+	}
+	pw.Cancel()
+}
+
+// RemoveWorkers deletes pooled workers with pid
+func (q *Description) RemoveWorkers(pid int64) {
+	q.mutex.Lock()
+	delete(q.PoolWorkers, pid)
+	q.mutex.Unlock()
+}
+
+// AddWorkers adds workers to the queue if it has registered an add worker function
+func (q *Description) AddWorkers(number int, timeout time.Duration) {
+	if q.addWorkers != nil {
+		_ = q.addWorkers(number, timeout)
+	}
+}
+
+// NumberOfWorkers returns the number of workers in the queue
+func (q *Description) NumberOfWorkers() int {
+	if q.numberOfWorkers != nil {
+		return q.numberOfWorkers()
+	}
+	return -1
+}
+
+func (l DescriptionList) Len() int {
+	return len(l)
+}
+
+func (l DescriptionList) Less(i, j int) bool {
+	return l[i].Name < l[j].Name
+}
+
+func (l DescriptionList) Swap(i, j int) {
+	l[i], l[j] = l[j], l[i]
+}
+
+func (l PoolWorkersList) Len() int {
+	return len(l)
+}
+
+func (l PoolWorkersList) Less(i, j int) bool {
+	return l[i].Start.Before(l[j].Start)
+}
+
+func (l PoolWorkersList) Swap(i, j int) {
+	l[i], l[j] = l[j], l[i]
+}

modules/queue/queue.go

@@ -48,6 +48,11 @@ type Shutdownable interface {
 	Terminate()
 }
 
+// Named represents a queue with a name
+type Named interface {
+	Name() string
+}
+
 // Queue defines an interface to save an issue indexer queue
 type Queue interface {
 	Run(atShutdown, atTerminate func(context.Context, func()))

modules/queue/queue_channel.go

@@ -48,7 +48,7 @@ func NewChannelQueue(handle HandlerFunc, cfg, exemplar interface{}) (Queue, erro
 	dataChan := make(chan Data, config.QueueLength)
 
 	ctx, cancel := context.WithCancel(context.Background())
-	return &ChannelQueue{
+	queue := &ChannelQueue{
 		pool: &WorkerPool{
 			baseCtx:      ctx,
 			cancel:       cancel,
@@ -62,7 +62,9 @@ func NewChannelQueue(handle HandlerFunc, cfg, exemplar interface{}) (Queue, erro
 		exemplar: exemplar,
 		workers:  config.Workers,
 		name:     config.Name,
-	}, nil
+	}
+	queue.pool.qid = GetManager().Add(queue, ChannelQueueType, config, exemplar, queue.pool.AddWorkers, queue.pool.NumberOfWorkers)
+	return queue, nil
 }
 
 // Run starts to run the queue
@@ -73,7 +75,9 @@ func (c *ChannelQueue) Run(atShutdown, atTerminate func(context.Context, func())
 	atTerminate(context.Background(), func() {
 		log.Warn("ChannelQueue: %s is not terminatable!", c.name)
 	})
-	c.pool.addWorkers(c.pool.baseCtx, c.workers)
+	go func() {
+		_ = c.pool.AddWorkers(c.workers, 0)
+	}()
 }
 
 // Push will push the indexer data to queue
@@ -90,6 +94,11 @@ func (c *ChannelQueue) Push(data Data) error {
 	return nil
 }
 
+// Name returns the name of this queue
+func (c *ChannelQueue) Name() string {
+	return c.name
+}
+
 func init() {
 	queuesMap[ChannelQueueType] = NewChannelQueue
 }

modules/queue/queue_disk.go

@@ -50,7 +50,7 @@ func NewLevelQueue(handle HandlerFunc, cfg, exemplar interface{}) (Queue, error)
 	}
 	config := configInterface.(LevelQueueConfiguration)
 
-	queue, err := levelqueue.Open(config.DataDir)
+	internal, err := levelqueue.Open(config.DataDir)
 	if err != nil {
 		return nil, err
 	}
@@ -58,7 +58,7 @@ func NewLevelQueue(handle HandlerFunc, cfg, exemplar interface{}) (Queue, error)
 	dataChan := make(chan Data, config.QueueLength)
 	ctx, cancel := context.WithCancel(context.Background())
 
-	return &LevelQueue{
+	queue := &LevelQueue{
 		pool: &WorkerPool{
 			baseCtx:      ctx,
 			cancel:       cancel,
@@ -69,13 +69,15 @@ func NewLevelQueue(handle HandlerFunc, cfg, exemplar interface{}) (Queue, error)
 			boostTimeout: config.BoostTimeout,
 			boostWorkers: config.BoostWorkers,
 		},
-		queue:      queue,
+		queue:      internal,
 		exemplar:   exemplar,
 		closed:     make(chan struct{}),
 		terminated: make(chan struct{}),
 		workers:    config.Workers,
 		name:       config.Name,
-	}, nil
+	}
+	queue.pool.qid = GetManager().Add(queue, LevelQueueType, config, exemplar, queue.pool.AddWorkers, queue.pool.NumberOfWorkers)
+	return queue, nil
 }
 
 // Run starts to run the queue
@@ -83,7 +85,9 @@ func (l *LevelQueue) Run(atShutdown, atTerminate func(context.Context, func()))
 	atShutdown(context.Background(), l.Shutdown)
 	atTerminate(context.Background(), l.Terminate)
 
-	go l.pool.addWorkers(l.pool.baseCtx, l.workers)
+	go func() {
+		_ = l.pool.AddWorkers(l.workers, 0)
+	}()
 
 	go l.readToChan()
 
@@ -140,7 +144,7 @@ func (l *LevelQueue) readToChan() {
 
 			log.Trace("LevelQueue %s: task found: %#v", l.name, data)
 			l.pool.Push(data)
-			time.Sleep(time.Millisecond * 10)
+			time.Sleep(time.Millisecond * 100)
 
 		}
 	}
@@ -183,6 +187,11 @@ func (l *LevelQueue) Terminate() {
 	}
 }
 
+// Name returns the name of this queue
+func (l *LevelQueue) Name() string {
+	return l.name
+}
+
 func init() {
 	queuesMap[LevelQueueType] = NewLevelQueue
 }

modules/queue/queue_disk_channel.go

@@ -85,7 +85,7 @@ func NewPersistableChannelQueue(handle HandlerFunc, cfg, exemplar interface{}) (
 		return nil, ErrInvalidConfiguration{cfg: cfg}
 	}
 
-	return &PersistableChannelQueue{
+	queue := &PersistableChannelQueue{
 		ChannelQueue: channelQueue.(*ChannelQueue),
 		delayedStarter: delayedStarter{
 			cfg:         levelCfg,
@@ -95,7 +95,9 @@ func NewPersistableChannelQueue(handle HandlerFunc, cfg, exemplar interface{}) (
 			name:        config.Name,
 		},
 		closed: make(chan struct{}),
-	}, nil
+	}
+	_ = GetManager().Add(queue, PersistableChannelQueueType, config, exemplar, nil, nil)
+	return queue, nil
 }
 
 // Name returns the name of this queue
@@ -127,7 +129,9 @@ func (p *PersistableChannelQueue) Run(atShutdown, atTerminate func(context.Conte
 	// Just run the level queue - we shut it down later
 	go p.internal.Run(func(_ context.Context, _ func()) {}, func(_ context.Context, _ func()) {})
 
-	go p.ChannelQueue.pool.addWorkers(p.ChannelQueue.pool.baseCtx, p.workers)
+	go func() {
+		_ = p.ChannelQueue.pool.AddWorkers(p.workers, 0)
+	}()
 
 	<-p.closed
 	p.ChannelQueue.pool.cancel()

modules/queue/queue_redis.go

@@ -67,7 +67,7 @@ func NewRedisQueue(handle HandlerFunc, cfg, exemplar interface{}) (Queue, error)
 	dataChan := make(chan Data, config.QueueLength)
 	ctx, cancel := context.WithCancel(context.Background())
 
-	var queue = RedisQueue{
+	var queue = &RedisQueue{
 		pool: &WorkerPool{
 			baseCtx:      ctx,
 			cancel:       cancel,
@@ -100,7 +100,9 @@ func NewRedisQueue(handle HandlerFunc, cfg, exemplar interface{}) (Queue, error)
 	if err := queue.client.Ping().Err(); err != nil {
 		return nil, err
 	}
-	return &queue, nil
+	queue.pool.qid = GetManager().Add(queue, RedisQueueType, config, exemplar, queue.pool.AddWorkers, queue.pool.NumberOfWorkers)
+
+	return queue, nil
 }
 
 // Run runs the redis queue
@@ -108,7 +110,9 @@ func (r *RedisQueue) Run(atShutdown, atTerminate func(context.Context, func()))
 	atShutdown(context.Background(), r.Shutdown)
 	atTerminate(context.Background(), r.Terminate)
 
-	go r.pool.addWorkers(r.pool.baseCtx, r.workers)
+	go func() {
+		_ = r.pool.AddWorkers(r.workers, 0)
+	}()
 
 	go r.readToChan()
 
@@ -198,6 +202,11 @@ func (r *RedisQueue) Terminate() {
 	}
 }
 
+// Name returns the name of this queue
+func (r *RedisQueue) Name() string {
+	return r.name
+}
+
 func init() {
 	queuesMap[RedisQueueType] = NewRedisQueue
 }

modules/queue/queue_wrapped.go

@@ -111,7 +111,7 @@ func NewWrappedQueue(handle HandlerFunc, cfg, exemplar interface{}) (Queue, erro
 		return nil, ErrInvalidConfiguration{cfg: cfg}
 	}
 
-	return &WrappedQueue{
+	queue = &WrappedQueue{
 		handle:   handle,
 		channel:  make(chan Data, config.QueueLength),
 		exemplar: exemplar,
@@ -122,7 +122,14 @@ func NewWrappedQueue(handle HandlerFunc, cfg, exemplar interface{}) (Queue, erro
 			maxAttempts: config.MaxAttempts,
 			name:        config.Name,
 		},
-	}, nil
+	}
+	_ = GetManager().Add(queue, WrappedQueueType, config, exemplar, nil, nil)
+	return queue, nil
+}
+
+// Name returns the name of the queue
+func (q *WrappedQueue) Name() string {
+	return q.name + "-wrapper"
 }
 
 // Push will push the data to the internal channel checking it against the exemplar

modules/queue/workerpool.go

@@ -18,6 +18,7 @@ type WorkerPool struct {
 	baseCtx         context.Context
 	cancel          context.CancelFunc
 	cond            *sync.Cond
+	qid             int64
 	numberOfWorkers int
 	batchLength     int
 	handle          HandlerFunc
@@ -68,8 +69,21 @@ func (p *WorkerPool) pushBoost(data Data) {
 				return
 			}
 			p.blockTimeout *= 2
-			log.Warn("Worker Channel blocked for %v - adding %d temporary workers for %s, block timeout now %v", ourTimeout, p.boostWorkers, p.boostTimeout, p.blockTimeout)
 			ctx, cancel := context.WithCancel(p.baseCtx)
+			desc := GetManager().GetDescription(p.qid)
+			if desc != nil {
+				log.Warn("Worker Channel for %v blocked for %v - adding %d temporary workers for %s, block timeout now %v", desc.Name, ourTimeout, p.boostWorkers, p.boostTimeout, p.blockTimeout)
+
+				start := time.Now()
+				pid := desc.RegisterWorkers(p.boostWorkers, start, false, start, cancel)
+				go func() {
+					<-ctx.Done()
+					desc.RemoveWorkers(pid)
+					cancel()
+				}()
+			} else {
+				log.Warn("Worker Channel blocked for %v - adding %d temporary workers for %s, block timeout now %v", ourTimeout, p.boostWorkers, p.boostTimeout, p.blockTimeout)
+			}
 			go func() {
 				<-time.After(p.boostTimeout)
 				cancel()
@@ -95,12 +109,26 @@ func (p *WorkerPool) NumberOfWorkers() int {
 func (p *WorkerPool) AddWorkers(number int, timeout time.Duration) context.CancelFunc {
 	var ctx context.Context
 	var cancel context.CancelFunc
+	start := time.Now()
+	end := start
+	hasTimeout := false
 	if timeout > 0 {
 		ctx, cancel = context.WithTimeout(p.baseCtx, timeout)
+		end = start.Add(timeout)
+		hasTimeout = true
 	} else {
 		ctx, cancel = context.WithCancel(p.baseCtx)
 	}
 
+	desc := GetManager().GetDescription(p.qid)
+	if desc != nil {
+		pid := desc.RegisterWorkers(number, start, hasTimeout, end, cancel)
+		go func() {
+			<-ctx.Done()
+			desc.RemoveWorkers(pid)
+			cancel()
+		}()
+	}
 	p.addWorkers(ctx, number)
 	return cancel
 }

options/locale/locale_en-US.ini

@@ -2022,6 +2022,34 @@ monitor.execute_time = Execution Time
 monitor.process.cancel = Cancel process
 monitor.process.cancel_desc =  Cancelling a process may cause data loss
 monitor.process.cancel_notices =  Cancel: <strong>%s</strong>?
+monitor.queues = Queues
+monitor.queue = Queue: %s
+monitor.queue.name = Name
+monitor.queue.type = Type
+monitor.queue.exemplar = Exemplar Type
+monitor.queue.numberworkers = Number of Workers
+monitor.queue.review = Review Config
+monitor.queue.review_add = Review/Add Workers
+monitor.queue.configuration = Initial Configuration
+monitor.queue.nopool.title = No Worker Pool
+monitor.queue.nopool.desc = This queue wraps other queues and does not itself have a worker pool.
+monitor.queue.wrapped.desc = A wrapped queue wraps a slow starting queue, buffering queued requests in a channel. It does not have a worker pool itself.
+monitor.queue.persistable-channel.desc = A persistable-channel wraps two queues, a channel queue that has its own worker pool and a level queue for persisted requests from previous shutdowns. It does not have a worker pool itself.
+monitor.queue.pool.timeout = Timeout
+monitor.queue.pool.addworkers.title = Add Workers
+monitor.queue.pool.addworkers.submit = Add Workers
+monitor.queue.pool.addworkers.desc = Add Workers to this pool with or without a timeout. If you set a timeout these workers will be removed from the pool after the timeout has lapsed.
+monitor.queue.pool.addworkers.numberworkers.placeholder = Number of Workers
+monitor.queue.pool.addworkers.timeout.placeholder = Set to 0 for no timeout
+monitor.queue.pool.addworkers.mustnumbergreaterzero = Number of Workers to add must be greater than zero
+monitor.queue.pool.addworkers.musttimeoutduration = Timeout must be a golang duration eg. 5m or be 0
+monitor.queue.pool.added = Worker Group Added
+monitor.queue.pool.workers.title = Active Worker Groups
+monitor.queue.pool.workers.none = No worker groups.
+monitor.queue.pool.cancel = Shutdown Worker Group
+monitor.queue.pool.cancelling = Worker Group shutting down
+monitor.queue.pool.cancel_notices = Shutdown this group of %s workers?
+monitor.queue.pool.cancel_desc = Leaving a queue without any worker groups may cause requests may block indefinitely.
 
 notices.system_notice_list = System Notices
 notices.view_detail_header = View Notice Details

routers/admin/admin.go

@@ -22,6 +22,7 @@ import (
 	"code.gitea.io/gitea/modules/graceful"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/process"
+	"code.gitea.io/gitea/modules/queue"
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/timeutil"
 	"code.gitea.io/gitea/services/mailer"
@@ -35,6 +36,7 @@ const (
 	tplDashboard base.TplName = "admin/dashboard"
 	tplConfig    base.TplName = "admin/config"
 	tplMonitor   base.TplName = "admin/monitor"
+	tplQueue     base.TplName = "admin/queue"
 )
 
 var (
@@ -355,6 +357,7 @@ func Monitor(ctx *context.Context) {
 	ctx.Data["PageIsAdminMonitor"] = true
 	ctx.Data["Processes"] = process.GetManager().Processes()
 	ctx.Data["Entries"] = cron.ListTasks()
+	ctx.Data["Queues"] = queue.GetManager().Descriptions()
 	ctx.HTML(200, tplMonitor)
 }
 
@@ -366,3 +369,59 @@ func MonitorCancel(ctx *context.Context) {
 		"redirect": ctx.Repo.RepoLink + "/admin/monitor",
 	})
 }
+
+// Queue shows details for a specific queue
+func Queue(ctx *context.Context) {
+	qid := ctx.ParamsInt64("qid")
+	desc := queue.GetManager().GetDescription(qid)
+	if desc == nil {
+		ctx.Status(404)
+		return
+	}
+	ctx.Data["Title"] = ctx.Tr("admin.monitor.queue", desc.Name)
+	ctx.Data["PageIsAdmin"] = true
+	ctx.Data["PageIsAdminMonitor"] = true
+	ctx.Data["Queue"] = desc
+	ctx.HTML(200, tplQueue)
+}
+
+// WorkerCancel cancels a worker group
+func WorkerCancel(ctx *context.Context) {
+	qid := ctx.ParamsInt64("qid")
+	desc := queue.GetManager().GetDescription(qid)
+	if desc == nil {
+		ctx.Status(404)
+		return
+	}
+	pid := ctx.ParamsInt64("pid")
+	desc.CancelWorkers(pid)
+	ctx.Flash.Info(ctx.Tr("admin.monitor.queue.pool.cancelling"))
+	ctx.JSON(200, map[string]interface{}{
+		"redirect": setting.AppSubURL + fmt.Sprintf("/admin/monitor/queue/%d", qid),
+	})
+}
+
+// AddWorkers adds workers to a worker group
+func AddWorkers(ctx *context.Context) {
+	qid := ctx.ParamsInt64("qid")
+	desc := queue.GetManager().GetDescription(qid)
+	if desc == nil {
+		ctx.Status(404)
+		return
+	}
+	number := ctx.QueryInt("number")
+	if number < 1 {
+		ctx.Flash.Error(ctx.Tr("admin.monitor.queue.pool.addworkers.mustnumbergreaterzero"))
+		ctx.Redirect(setting.AppSubURL + fmt.Sprintf("/admin/monitor/queue/%d", qid))
+		return
+	}
+	timeout, err := time.ParseDuration(ctx.Query("timeout"))
+	if err != nil {
+		ctx.Flash.Error(ctx.Tr("admin.monitor.queue.pool.addworkers.musttimeoutduration"))
+		ctx.Redirect(setting.AppSubURL + fmt.Sprintf("/admin/monitor/queue/%d", qid))
+		return
+	}
+	desc.AddWorkers(number, timeout)
+	ctx.Flash.Success(ctx.Tr("admin.monitor.queue.pool.added"))
+	ctx.Redirect(setting.AppSubURL + fmt.Sprintf("/admin/monitor/queue/%d", qid))
+}

routers/routes/routes.go

@@ -411,8 +411,15 @@ func RegisterRoutes(m *macaron.Macaron) {
 		m.Get("", adminReq, admin.Dashboard)
 		m.Get("/config", admin.Config)
 		m.Post("/config/test_mail", admin.SendTestMail)
-		m.Get("/monitor", admin.Monitor)
+		m.Group("/monitor", func() {
-		m.Post("/monitor/cancel/:pid", admin.MonitorCancel)
+			m.Get("", admin.Monitor)
+			m.Post("/cancel/:pid", admin.MonitorCancel)
+			m.Group("/queue/:qid", func() {
+				m.Get("", admin.Queue)
+				m.Post("/add", admin.AddWorkers)
+				m.Post("/cancel/:pid", admin.WorkerCancel)
+			})
+		})
 
 		m.Group("/users", func() {
 			m.Get("", admin.Users)

templates/admin/monitor.tmpl

@@ -32,6 +32,34 @@
 		</div>
 
 		<h4 class="ui top attached header">
+			{{.i18n.Tr "admin.monitor.queues"}}
+		</h4>
+		<div class="ui attached table segment">
+			<table class="ui very basic striped table">
+				<thead>
+					<tr>
+						<th>{{.i18n.Tr "admin.monitor.queue.name"}}</th>
+						<th>{{.i18n.Tr "admin.monitor.queue.type"}}</th>
+						<th>{{.i18n.Tr "admin.monitor.queue.exemplar"}}</th>
+						<th>{{.i18n.Tr "admin.monitor.queue.numberworkers"}}</th>
+						<th></th>
+					</tr>
+				</thead>
+				<tbody>
+					{{range .Queues}}
+						<tr>
+							<td>{{.Name}}</td>
+							<td>{{.Type}}</td>
+							<td>{{.ExemplarType}}</td>
+							<td>{{$sum := .NumberOfWorkers}}{{if lt $sum 0}}-{{else}}{{$sum}}{{end}}</td>
+							<td><a href="{{$.Link}}/queue/{{.QID}}" class="button">{{if lt $sum 0}}{{$.i18n.Tr "admin.monitor.queue.review"}}{{else}}{{$.i18n.Tr "admin.monitor.queue.review_add"}}{{end}}</a>
+						</tr>
+					{{end}}
+				</tbody>
+			</table>
+		</div>
+
+		<h4 class="ui top attached header">
 			{{.i18n.Tr "admin.monitor.process"}}
 		</h4>
 		<div class="ui attached table segment">

templates/admin/queue.tmpl

@@ -0,0 +1,117 @@
+{{template "base/head" .}}
+<div class="admin monitor">
+	{{template "admin/navbar" .}}
+	<div class="ui container">
+		{{template "base/alert" .}}
+		<h4 class="ui top attached header">
+			{{.i18n.Tr "admin.monitor.queue" .Queue.Name}}
+		</h4>
+		<div class="ui attached table segment">
+			<table class="ui very basic striped table">
+				<thead>
+					<tr>
+						<th>{{.i18n.Tr "admin.monitor.queue.name"}}</th>
+						<th>{{.i18n.Tr "admin.monitor.queue.type"}}</th>
+						<th>{{.i18n.Tr "admin.monitor.queue.exemplar"}}</th>
+						<th>{{.i18n.Tr "admin.monitor.queue.numberworkers"}}</th>
+					</tr>
+				</thead>
+				<tbody>
+					<tr>
+						<td>{{.Queue.Name}}</td>
+						<td>{{.Queue.Type}}</td>
+						<td>{{.Queue.ExemplarType}}</td>
+						<td>{{$sum := .Queue.NumberOfWorkers}}{{if lt $sum 0}}-{{else}}{{$sum}}{{end}}</td>
+					</tr>
+				</tbody>
+			</table>
+		</div>
+		{{if lt $sum 0 }}
+		<h4 class="ui top attached header">
+			{{.i18n.Tr "admin.monitor.queue.nopool.title"}}
+		</h4>
+		<div class="ui attached segment">
+			{{if eq .Queue.Type "wrapped" }}
+			<p>{{.i18n.Tr "admin.monitor.queue.wrapped.desc"}}</p>
+			{{else if eq .Queue.Type "persistable-channel"}}
+			<p>{{.i18n.Tr "admin.monitor.queue.persistable-channel.desc"}}</p>
+			{{else}}
+			<p>{{.i18n.Tr "admin.monitor.queue.nopool.desc"}}</p>
+			{{end}}
+		</div>
+		{{else}}
+		<h4 class="ui top attached header">
+			{{.i18n.Tr "admin.monitor.queue.pool.addworkers.title"}}
+		</h4>
+		<div class="ui attached segment">
+			<p>{{.i18n.Tr "admin.monitor.queue.pool.addworkers.desc"}}</p>
+			<form method="POST" action="{{.Link}}/add">
+				{{$.CsrfTokenHtml}}
+				<div class="ui form">
+					<div class="fields">
+						<div class="field">
+							<label>{{.i18n.Tr "admin.monitor.queue.numberworkers"}}</label>
+							<input name="number" type="text" placeholder="{{.i18n.Tr "admin.monitor.queue.pool.addworkers.numberworkers.placeholder"}}">
+						</div>
+						<div class="field">
+							<label>{{.i18n.Tr "admin.monitor.queue.pool.timeout"}}</label>
+							<input name="timeout" type="text" placeholder="{{.i18n.Tr "admin.monitor.queue.pool.addworkers.timeout.placeholder"}}">
+						</div>
+					</div>
+					<button class="ui submit button">{{.i18n.Tr "admin.monitor.queue.pool.addworkers.submit"}}</button>
+				</div>
+			</form>
+		</div>
+		<h4 class="ui top attached header">
+			{{.i18n.Tr "admin.monitor.queue.pool.workers.title"}}
+		</h4>
+		<div class="ui attached table segment">
+			<table class="ui very basic striped table">
+				<thead>
+					<tr>
+						<th>{{.i18n.Tr "admin.monitor.queue.numberworkers"}}</th>
+						<th>{{.i18n.Tr "admin.monitor.start"}}</th>
+						<th>{{.i18n.Tr "admin.monitor.queue.pool.timeout"}}</th>
+						<th></th>
+					</tr>
+				</thead>
+				<tbody>
+					{{range .Queue.Workers}}
+					<tr>
+						<td>{{.Workers}}</td>
+						<td>{{DateFmtLong .Start}}</td>
+						<td>{{if .HasTimeout}}{{DateFmtLong .Timeout}}{{else}}-{{end}}</td>
+						<td>
+							<a class="delete-button" href="" data-url="{{$.Link}}/cancel/{{.PID}}" data-id="{{.PID}}" data-name="{{.Workers}}"><i class="close icon text red" title="{{$.i18n.Tr "remove"}}"></i></a>
+						</td>
+					</tr>
+					{{else}}
+						<tr>
+							<td colspan="4">{{.i18n.Tr "admin.monitor.queue.pool.workers.none" }}
+						</tr>
+					{{end}}
+				</tbody>
+			</table>
+		</div>
+		{{end}}
+		<h4 class="ui top attached header">
+			{{.i18n.Tr "admin.monitor.queue.configuration"}}
+		</h4>
+		<div class="ui attached segment">
+			<pre>{{.Queue.Configuration | JsonPrettyPrint}}
+		</div>
+	</div>
+</div>
+<div class="ui small basic delete modal">
+	<div class="ui icon header">
+		<i class="close icon"></i>
+		{{.i18n.Tr "admin.monitor.queue.pool.cancel"}}
+	</div>
+	<div class="content">
+		<p>{{$.i18n.Tr "admin.monitor.queue.pool.cancel_notices" `<span class="name"></span>` | Safe}}</p>
+		<p>{{$.i18n.Tr "admin.monitor.queue.pool.cancel_desc"}}</p>
+	</div>
+	{{template "base/delete_modal_actions" .}}
+</div>
+
+{{template "base/footer" .}}