mirror of
https://github.com/strukturag/nextcloud-spreed-signaling
synced 2024-04-26 19:30:26 +02:00
Add SingleNotifier class.
This commit is contained in:
Joachim Bauch
parent
a0d3af14e0
commit
2ca9fb21c4
28
notifier.go
28
notifier.go
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@ -29,17 +29,7 @@ import (
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type Waiter struct {
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key string
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ctx context.Context
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cancel context.CancelFunc
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}
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func (w *Waiter) Wait(ctx context.Context) error {
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select {
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case <-w.ctx.Done():
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return nil
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case <-ctx.Done():
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return ctx.Err()
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}
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SingleWaiter
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}
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type Notifier struct {
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@ -56,9 +46,11 @@ func (n *Notifier) NewWaiter(key string) *Waiter {
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waiter, found := n.waiters[key]
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if found {
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w := &Waiter{
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key: key,
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ctx: waiter.ctx,
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cancel: waiter.cancel,
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key: key,
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SingleWaiter: SingleWaiter{
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ctx: waiter.ctx,
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cancel: waiter.cancel,
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},
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}
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n.waiterMap[key][w] = true
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return w
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@ -66,9 +58,11 @@ func (n *Notifier) NewWaiter(key string) *Waiter {
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ctx, cancel := context.WithCancel(context.Background())
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waiter = &Waiter{
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key: key,
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ctx: ctx,
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cancel: cancel,
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key: key,
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SingleWaiter: SingleWaiter{
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ctx: ctx,
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cancel: cancel,
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},
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}
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if n.waiters == nil {
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n.waiters = make(map[string]*Waiter)
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109
single_notifier.go
Normal file
109
single_notifier.go
Normal file
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@ -0,0 +1,109 @@
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/**
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* Standalone signaling server for the Nextcloud Spreed app.
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* Copyright (C) 2022 struktur AG
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*
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* @author Joachim Bauch <bauch@struktur.de>
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*
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* @license GNU AGPL version 3 or any later version
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package signaling
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import (
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"context"
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"sync"
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)
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type SingleWaiter struct {
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ctx context.Context
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cancel context.CancelFunc
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}
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func (w *SingleWaiter) Wait(ctx context.Context) error {
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select {
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case <-w.ctx.Done():
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return nil
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case <-ctx.Done():
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return ctx.Err()
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}
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}
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type SingleNotifier struct {
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sync.Mutex
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waiter *SingleWaiter
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waiters map[*SingleWaiter]bool
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}
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func (n *SingleNotifier) NewWaiter() *SingleWaiter {
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n.Lock()
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defer n.Unlock()
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if n.waiter == nil {
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ctx, cancel := context.WithCancel(context.Background())
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n.waiter = &SingleWaiter{
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ctx: ctx,
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cancel: cancel,
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}
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}
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if n.waiters == nil {
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n.waiters = make(map[*SingleWaiter]bool)
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}
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w := &SingleWaiter{
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ctx: n.waiter.ctx,
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cancel: n.waiter.cancel,
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}
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n.waiters[w] = true
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return w
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}
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func (n *SingleNotifier) Reset() {
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n.Lock()
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defer n.Unlock()
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if n.waiter != nil {
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n.waiter.cancel()
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n.waiter = nil
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}
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n.waiters = nil
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}
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func (n *SingleNotifier) Release(w *SingleWaiter) {
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n.Lock()
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defer n.Unlock()
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if _, found := n.waiters[w]; found {
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delete(n.waiters, w)
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if len(n.waiters) == 0 {
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n.waiters = nil
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if n.waiter != nil {
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n.waiter.cancel()
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n.waiter = nil
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}
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}
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}
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}
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func (n *SingleNotifier) Notify() {
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n.Lock()
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defer n.Unlock()
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if n.waiter != nil {
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n.waiter.cancel()
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}
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n.waiters = nil
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}
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150
single_notifier_test.go
Normal file
150
single_notifier_test.go
Normal file
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@ -0,0 +1,150 @@
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/**
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* Standalone signaling server for the Nextcloud Spreed app.
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* Copyright (C) 2022 struktur AG
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*
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* @author Joachim Bauch <bauch@struktur.de>
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*
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* @license GNU AGPL version 3 or any later version
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package signaling
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import (
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"context"
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"sync"
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"testing"
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"time"
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)
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func TestSingleNotifierNoWaiter(t *testing.T) {
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var notifier SingleNotifier
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// Notifications can be sent even if no waiter exists.
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notifier.Notify()
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}
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func TestSingleNotifierSimple(t *testing.T) {
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var notifier SingleNotifier
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var wg sync.WaitGroup
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wg.Add(1)
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waiter := notifier.NewWaiter()
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defer notifier.Release(waiter)
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go func() {
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defer wg.Done()
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ctx, cancel := context.WithTimeout(context.Background(), time.Second)
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defer cancel()
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if err := waiter.Wait(ctx); err != nil {
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t.Error(err)
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}
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}()
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notifier.Notify()
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wg.Wait()
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}
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func TestSingleNotifierMultiNotify(t *testing.T) {
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var notifier SingleNotifier
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waiter := notifier.NewWaiter()
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defer notifier.Release(waiter)
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notifier.Notify()
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// The second notification will be ignored while the first is still pending.
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notifier.Notify()
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}
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func TestSingleNotifierWaitClosed(t *testing.T) {
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var notifier SingleNotifier
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waiter := notifier.NewWaiter()
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notifier.Release(waiter)
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if err := waiter.Wait(context.Background()); err != nil {
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t.Error(err)
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}
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}
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func TestSingleNotifierWaitClosedMulti(t *testing.T) {
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var notifier SingleNotifier
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waiter1 := notifier.NewWaiter()
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waiter2 := notifier.NewWaiter()
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notifier.Release(waiter1)
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notifier.Release(waiter2)
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if err := waiter1.Wait(context.Background()); err != nil {
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t.Error(err)
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}
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if err := waiter2.Wait(context.Background()); err != nil {
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t.Error(err)
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}
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}
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func TestSingleNotifierResetWillNotify(t *testing.T) {
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var notifier SingleNotifier
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var wg sync.WaitGroup
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wg.Add(1)
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waiter := notifier.NewWaiter()
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defer notifier.Release(waiter)
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go func() {
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defer wg.Done()
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ctx, cancel := context.WithTimeout(context.Background(), time.Second)
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defer cancel()
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if err := waiter.Wait(ctx); err != nil {
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t.Error(err)
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}
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}()
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notifier.Reset()
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wg.Wait()
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}
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func TestSingleNotifierDuplicate(t *testing.T) {
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var notifier SingleNotifier
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var wgStart sync.WaitGroup
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var wgEnd sync.WaitGroup
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for i := 0; i < 2; i++ {
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wgStart.Add(1)
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wgEnd.Add(1)
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go func() {
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defer wgEnd.Done()
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waiter := notifier.NewWaiter()
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defer notifier.Release(waiter)
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// Goroutine has created the waiter and is ready.
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wgStart.Done()
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ctx, cancel := context.WithTimeout(context.Background(), time.Second)
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defer cancel()
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if err := waiter.Wait(ctx); err != nil {
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t.Error(err)
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}
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}()
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}
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wgStart.Wait()
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time.Sleep(100 * time.Millisecond)
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notifier.Notify()
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wgEnd.Wait()
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}
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