Wire in UI for pausing

Signed-off-by: Andrew Thornton <art27@cantab.net>

modules/queue/manager.go

@@ -310,6 +310,12 @@ func (q *ManagedQueue) AddWorkers(number int, timeout time.Duration) context.Can
 	return nil
 }
 
+// Flushable returns true if the queue is flushable
+func (q *ManagedQueue) Flushable() bool {
+	_, ok := q.Managed.(Flushable)
+	return ok
+}
+
 // Flush flushes the queue with a timeout
 func (q *ManagedQueue) Flush(timeout time.Duration) error {
 	if flushable, ok := q.Managed.(Flushable); ok {
@@ -327,6 +333,34 @@ func (q *ManagedQueue) IsEmpty() bool {
 	return true
 }
 
+// Pausable returns whether the queue is Pausable
+func (q *ManagedQueue) Pausable() bool {
+	_, ok := q.Managed.(Pausable)
+	return ok
+}
+
+// Pause pauses the queue
+func (q *ManagedQueue) Pause() {
+	if pausable, ok := q.Managed.(Pausable); ok {
+		pausable.Pause()
+	}
+}
+
+// IsPaused reveals if the queue is paused
+func (q *ManagedQueue) IsPaused() bool {
+	if pausable, ok := q.Managed.(Pausable); ok {
+		return pausable.IsPaused()
+	}
+	return false
+}
+
+// Resume resumes the queue
+func (q *ManagedQueue) Resume() {
+	if pausable, ok := q.Managed.(Pausable); ok {
+		pausable.Resume()
+	}
+}
+
 // NumberOfWorkers returns the number of workers in the queue
 func (q *ManagedQueue) NumberOfWorkers() int {
 	if pool, ok := q.Managed.(ManagedPool); ok {

options/locale/locale_en-US.ini

@@ -2540,6 +2540,12 @@ monitor.queue.pool.flush.title = Flush Queue
 monitor.queue.pool.flush.desc = Flush will add a worker that will terminate once the queue is empty, or it times out.
 monitor.queue.pool.flush.submit = Add Flush Worker
 monitor.queue.pool.flush.added = Flush Worker added for %[1]s
+monitor.queue.pool.pause.title = Pause Queue
+monitor.queue.pool.pause.desc = Pausing a Queue will prevent it from processing data
+monitor.queue.pool.pause.submit = Pause Queue
+monitor.queue.pool.resume.title = Resume Queue
+monitor.queue.pool.resume.desc = Set this queue to resume work
+monitor.queue.pool.resume.submit = Resume Queue
 
 monitor.queue.settings.title = Pool Settings
 monitor.queue.settings.desc = Pools dynamically grow with a boost in response to their worker queue blocking. These changes will not affect current worker groups.

routers/admin/admin.go

@@ -392,6 +392,30 @@ func Flush(ctx *context.Context) {
 	ctx.Redirect(setting.AppSubURL + "/admin/monitor/queue/" + strconv.FormatInt(qid, 10))
 }
 
+// Pause pauses a queue
+func Pause(ctx *context.Context) {
+	qid := ctx.ParamsInt64("qid")
+	mq := queue.GetManager().GetManagedQueue(qid)
+	if mq == nil {
+		ctx.Status(404)
+		return
+	}
+	mq.Pause()
+	ctx.Redirect(setting.AppSubURL + "/admin/monitor/queue/" + strconv.FormatInt(qid, 10))
+}
+
+// Resume resumes a queue
+func Resume(ctx *context.Context) {
+	qid := ctx.ParamsInt64("qid")
+	mq := queue.GetManager().GetManagedQueue(qid)
+	if mq == nil {
+		ctx.Status(404)
+		return
+	}
+	mq.Resume()
+	ctx.Redirect(setting.AppSubURL + "/admin/monitor/queue/" + strconv.FormatInt(qid, 10))
+}
+
 // AddWorkers adds workers to a worker group
 func AddWorkers(ctx *context.Context) {
 	qid := ctx.ParamsInt64("qid")

routers/routes/web.go

@@ -452,6 +452,8 @@ func RegisterRoutes(m *web.Route) {
 				m.Post("/add", admin.AddWorkers)
 				m.Post("/cancel/{pid}", admin.WorkerCancel)
 				m.Post("/flush", admin.Flush)
+				m.Post("/pause", admin.Pause)
+				m.Post("/resume", admin.Resume)
 			})
 		})
 

templates/admin/queue.tmpl

@@ -92,6 +92,35 @@
 				</div>
 			</form>
 		</div>
+		{{if .Queue.Pausable}}
+			{{if .Queue.IsPaused}}
+				<h4 class="ui top attached header">
+					{{.i18n.Tr "admin.monitor.queue.pool.resume.title"}}
+				</h4>
+				<div class="ui attached segment">
+					<p>{{.i18n.Tr "admin.monitor.queue.pool.resume.desc"}}</p>
+					<form method="POST" action="{{.Link}}/resume">
+						{{$.CsrfTokenHtml}}
+						<div class="ui form">
+							<button class="ui submit button">{{.i18n.Tr "admin.monitor.queue.pool.resume.submit"}}</button>
+						</div>
+					</form>
+				</div>
+			{{else}}
+				<h4 class="ui top attached header">
+					{{.i18n.Tr "admin.monitor.queue.pool.pause.title"}}
+				</h4>
+				<div class="ui attached segment">
+					<p>{{.i18n.Tr "admin.monitor.queue.pool.pause.desc"}}</p>
+					<form method="POST" action="{{.Link}}/pause">
+						{{$.CsrfTokenHtml}}
+						<div class="ui form">
+							<button class="ui submit button">{{.i18n.Tr "admin.monitor.queue.pool.pause.submit"}}</button>
+						</div>
+					</form>
+				</div>
+			{{end}}
+		{{end}}
 		<h4 class="ui top attached header">
 			{{.i18n.Tr "admin.monitor.queue.pool.flush.title"}}
 		</h4>