mirror of
https://github.com/go-gitea/gitea.git
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196 lines
5.7 KiB
Go
196 lines
5.7 KiB
Go
// Copyright 2019 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package queue
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import (
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"context"
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"sync"
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"time"
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"code.gitea.io/gitea/modules/log"
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)
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// PersistableChannelQueueType is the type for persistable queue
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const PersistableChannelQueueType Type = "persistable-channel"
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// PersistableChannelQueueConfiguration is the configuration for a PersistableChannelQueue
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type PersistableChannelQueueConfiguration struct {
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Name string
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DataDir string
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BatchLength int
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QueueLength int
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Timeout time.Duration
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MaxAttempts int
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Workers int
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MaxWorkers int
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BlockTimeout time.Duration
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BoostTimeout time.Duration
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BoostWorkers int
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}
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// PersistableChannelQueue wraps a channel queue and level queue together
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type PersistableChannelQueue struct {
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*ChannelQueue
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delayedStarter
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lock sync.Mutex
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closed chan struct{}
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}
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// NewPersistableChannelQueue creates a wrapped batched channel queue with persistable level queue backend when shutting down
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// This differs from a wrapped queue in that the persistent queue is only used to persist at shutdown/terminate
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func NewPersistableChannelQueue(handle HandlerFunc, cfg, exemplar interface{}) (Queue, error) {
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configInterface, err := toConfig(PersistableChannelQueueConfiguration{}, cfg)
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if err != nil {
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return nil, err
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}
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config := configInterface.(PersistableChannelQueueConfiguration)
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channelQueue, err := NewChannelQueue(handle, ChannelQueueConfiguration{
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QueueLength: config.QueueLength,
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BatchLength: config.BatchLength,
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Workers: config.Workers,
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MaxWorkers: config.MaxWorkers,
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BlockTimeout: config.BlockTimeout,
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BoostTimeout: config.BoostTimeout,
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BoostWorkers: config.BoostWorkers,
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Name: config.Name + "-channel",
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}, exemplar)
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if err != nil {
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return nil, err
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}
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// the level backend only needs temporary workers to catch up with the previously dropped work
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levelCfg := LevelQueueConfiguration{
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DataDir: config.DataDir,
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QueueLength: config.QueueLength,
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BatchLength: config.BatchLength,
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Workers: 1,
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MaxWorkers: 6,
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BlockTimeout: 1 * time.Second,
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BoostTimeout: 5 * time.Minute,
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BoostWorkers: 5,
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Name: config.Name + "-level",
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}
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levelQueue, err := NewLevelQueue(handle, levelCfg, exemplar)
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if err == nil {
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queue := &PersistableChannelQueue{
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ChannelQueue: channelQueue.(*ChannelQueue),
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delayedStarter: delayedStarter{
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internal: levelQueue.(*LevelQueue),
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name: config.Name,
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},
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closed: make(chan struct{}),
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}
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_ = GetManager().Add(queue, PersistableChannelQueueType, config, exemplar, nil)
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return queue, nil
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}
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if IsErrInvalidConfiguration(err) {
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// Retrying ain't gonna make this any better...
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return nil, ErrInvalidConfiguration{cfg: cfg}
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}
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queue := &PersistableChannelQueue{
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ChannelQueue: channelQueue.(*ChannelQueue),
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delayedStarter: delayedStarter{
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cfg: levelCfg,
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underlying: LevelQueueType,
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timeout: config.Timeout,
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maxAttempts: config.MaxAttempts,
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name: config.Name,
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},
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closed: make(chan struct{}),
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}
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_ = GetManager().Add(queue, PersistableChannelQueueType, config, exemplar, nil)
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return queue, nil
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}
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// Name returns the name of this queue
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func (p *PersistableChannelQueue) Name() string {
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return p.delayedStarter.name
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}
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// Push will push the indexer data to queue
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func (p *PersistableChannelQueue) Push(data Data) error {
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select {
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case <-p.closed:
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return p.internal.Push(data)
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default:
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return p.ChannelQueue.Push(data)
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}
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}
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// Run starts to run the queue
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func (p *PersistableChannelQueue) Run(atShutdown, atTerminate func(context.Context, func())) {
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p.lock.Lock()
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if p.internal == nil {
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err := p.setInternal(atShutdown, p.ChannelQueue.pool.handle, p.exemplar)
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p.lock.Unlock()
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if err != nil {
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log.Fatal("Unable to create internal queue for %s Error: %v", p.Name(), err)
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return
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}
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} else {
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p.lock.Unlock()
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}
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atShutdown(context.Background(), p.Shutdown)
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atTerminate(context.Background(), p.Terminate)
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// Just run the level queue - we shut it down later
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go p.internal.Run(func(_ context.Context, _ func()) {}, func(_ context.Context, _ func()) {})
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go func() {
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_ = p.ChannelQueue.pool.AddWorkers(p.workers, 0)
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}()
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log.Trace("PersistableChannelQueue: %s Waiting til closed", p.delayedStarter.name)
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<-p.closed
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log.Trace("PersistableChannelQueue: %s Cancelling pools", p.delayedStarter.name)
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p.ChannelQueue.pool.cancel()
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p.internal.(*LevelQueue).pool.cancel()
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log.Trace("PersistableChannelQueue: %s Waiting til done", p.delayedStarter.name)
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p.ChannelQueue.pool.Wait()
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p.internal.(*LevelQueue).pool.Wait()
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// Redirect all remaining data in the chan to the internal channel
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go func() {
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log.Trace("PersistableChannelQueue: %s Redirecting remaining data", p.delayedStarter.name)
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for data := range p.ChannelQueue.pool.dataChan {
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_ = p.internal.Push(data)
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}
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log.Trace("PersistableChannelQueue: %s Done Redirecting remaining data", p.delayedStarter.name)
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}()
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log.Trace("PersistableChannelQueue: %s Done main loop", p.delayedStarter.name)
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}
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// Shutdown processing this queue
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func (p *PersistableChannelQueue) Shutdown() {
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log.Trace("PersistableChannelQueue: %s Shutdown", p.delayedStarter.name)
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select {
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case <-p.closed:
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default:
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p.lock.Lock()
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defer p.lock.Unlock()
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if p.internal != nil {
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p.internal.(*LevelQueue).Shutdown()
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}
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close(p.closed)
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}
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}
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// Terminate this queue and close the queue
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func (p *PersistableChannelQueue) Terminate() {
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log.Trace("PersistableChannelQueue: %s Terminating", p.delayedStarter.name)
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p.Shutdown()
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p.lock.Lock()
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defer p.lock.Unlock()
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if p.internal != nil {
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p.internal.(*LevelQueue).Terminate()
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}
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}
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func init() {
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queuesMap[PersistableChannelQueueType] = NewPersistableChannelQueue
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}
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