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Queue: Make WorkerPools and Queues flushable (#10001)

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* Make WorkerPools and Queues flushable

Adds Flush methods to Queues and the WorkerPool
Further abstracts the WorkerPool
Adds a final step to Flush the queues in the defer from PrintCurrentTest
Fixes an issue with Settings inheritance in queues

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

* Change to for loop

* Add IsEmpty and begin just making the queues composed WorkerPools

* subsume workerpool into the queues and create a flushable interface

* Add manager command

* Move flushall to queue.Manager and add to testlogger

* As per @guillep2k

* as per @guillep2k

* Just make queues all implement flushable and clean up the wrapped queue flushes

* cope with no timeout

Co-authored-by: Lauris BH <lauris@nix.lv>
This commit is contained in:
zeripath
2020-01-29 01:01:06 +00:00
committed by GitHub
parent 7c84dbca4f
commit c01221e70f
27 changed files with 1030 additions and 327 deletions
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126
modules/queue/queue_disk_channel.go
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@@ -6,7 +6,9 @@ package queue
import (
"context"
"fmt"
"sync"
"sync/atomic"
"time"
"code.gitea.io/gitea/modules/log"
@@ -31,8 +33,10 @@ type PersistableChannelQueueConfiguration struct {
}
// PersistableChannelQueue wraps a channel queue and level queue together
// The disk level queue will be used to store data at shutdown and terminate - and will be restored
// on start up.
type PersistableChannelQueue struct {
*ChannelQueue
channelQueue *ChannelQueue
delayedStarter
lock sync.Mutex
closed chan struct{}
@@ -48,14 +52,16 @@ func NewPersistableChannelQueue(handle HandlerFunc, cfg, exemplar interface{}) (
config := configInterface.(PersistableChannelQueueConfiguration)
channelQueue, err := NewChannelQueue(handle, ChannelQueueConfiguration{
QueueLength: config.QueueLength,
BatchLength: config.BatchLength,
Workers: config.Workers,
MaxWorkers: config.MaxWorkers,
BlockTimeout: config.BlockTimeout,
BoostTimeout: config.BoostTimeout,
BoostWorkers: config.BoostWorkers,
Name: config.Name + "-channel",
WorkerPoolConfiguration: WorkerPoolConfiguration{
QueueLength: config.QueueLength,
BatchLength: config.BatchLength,
BlockTimeout: config.BlockTimeout,
BoostTimeout: config.BoostTimeout,
BoostWorkers: config.BoostWorkers,
MaxWorkers: config.MaxWorkers,
},
Workers: config.Workers,
Name: config.Name + "-channel",
}, exemplar)
if err != nil {
return nil, err
@@ -63,28 +69,30 @@ func NewPersistableChannelQueue(handle HandlerFunc, cfg, exemplar interface{}) (
// the level backend only needs temporary workers to catch up with the previously dropped work
levelCfg := LevelQueueConfiguration{
DataDir: config.DataDir,
QueueLength: config.QueueLength,
BatchLength: config.BatchLength,
Workers: 1,
MaxWorkers: 6,
BlockTimeout: 1 * time.Second,
BoostTimeout: 5 * time.Minute,
BoostWorkers: 5,
Name: config.Name + "-level",
WorkerPoolConfiguration: WorkerPoolConfiguration{
QueueLength: config.QueueLength,
BatchLength: config.BatchLength,
BlockTimeout: 1 * time.Second,
BoostTimeout: 5 * time.Minute,
BoostWorkers: 5,
MaxWorkers: 6,
},
DataDir: config.DataDir,
Workers: 1,
Name: config.Name + "-level",
}
levelQueue, err := NewLevelQueue(handle, levelCfg, exemplar)
if err == nil {
queue := &PersistableChannelQueue{
ChannelQueue: channelQueue.(*ChannelQueue),
channelQueue: channelQueue.(*ChannelQueue),
delayedStarter: delayedStarter{
internal: levelQueue.(*LevelQueue),
name: config.Name,
},
closed: make(chan struct{}),
}
_ = GetManager().Add(queue, PersistableChannelQueueType, config, exemplar, nil)
_ = GetManager().Add(queue, PersistableChannelQueueType, config, exemplar)
return queue, nil
}
if IsErrInvalidConfiguration(err) {
@@ -93,7 +101,7 @@ func NewPersistableChannelQueue(handle HandlerFunc, cfg, exemplar interface{}) (
}
queue := &PersistableChannelQueue{
ChannelQueue: channelQueue.(*ChannelQueue),
channelQueue: channelQueue.(*ChannelQueue),
delayedStarter: delayedStarter{
cfg: levelCfg,
underlying: LevelQueueType,
@@ -103,7 +111,7 @@ func NewPersistableChannelQueue(handle HandlerFunc, cfg, exemplar interface{}) (
},
closed: make(chan struct{}),
}
_ = GetManager().Add(queue, PersistableChannelQueueType, config, exemplar, nil)
_ = GetManager().Add(queue, PersistableChannelQueueType, config, exemplar)
return queue, nil
}
@@ -118,15 +126,17 @@ func (p *PersistableChannelQueue) Push(data Data) error {
case <-p.closed:
return p.internal.Push(data)
default:
return p.ChannelQueue.Push(data)
return p.channelQueue.Push(data)
}
}
// Run starts to run the queue
func (p *PersistableChannelQueue) Run(atShutdown, atTerminate func(context.Context, func())) {
log.Debug("PersistableChannelQueue: %s Starting", p.delayedStarter.name)
p.lock.Lock()
if p.internal == nil {
err := p.setInternal(atShutdown, p.ChannelQueue.pool.handle, p.exemplar)
err := p.setInternal(atShutdown, p.channelQueue.handle, p.channelQueue.exemplar)
p.lock.Unlock()
if err != nil {
log.Fatal("Unable to create internal queue for %s Error: %v", p.Name(), err)
@@ -142,31 +152,83 @@ func (p *PersistableChannelQueue) Run(atShutdown, atTerminate func(context.Conte
go p.internal.Run(func(_ context.Context, _ func()) {}, func(_ context.Context, _ func()) {})
go func() {
_ = p.ChannelQueue.pool.AddWorkers(p.workers, 0)
_ = p.channelQueue.AddWorkers(p.channelQueue.workers, 0)
}()
log.Trace("PersistableChannelQueue: %s Waiting til closed", p.delayedStarter.name)
<-p.closed
log.Trace("PersistableChannelQueue: %s Cancelling pools", p.delayedStarter.name)
p.ChannelQueue.pool.cancel()
p.internal.(*LevelQueue).pool.cancel()
p.channelQueue.cancel()
p.internal.(*LevelQueue).cancel()
log.Trace("PersistableChannelQueue: %s Waiting til done", p.delayedStarter.name)
p.ChannelQueue.pool.Wait()
p.internal.(*LevelQueue).pool.Wait()
p.channelQueue.Wait()
p.internal.(*LevelQueue).Wait()
// Redirect all remaining data in the chan to the internal channel
go func() {
log.Trace("PersistableChannelQueue: %s Redirecting remaining data", p.delayedStarter.name)
for data := range p.ChannelQueue.pool.dataChan {
for data := range p.channelQueue.dataChan {
_ = p.internal.Push(data)
atomic.AddInt64(&p.channelQueue.numInQueue, -1)
}
log.Trace("PersistableChannelQueue: %s Done Redirecting remaining data", p.delayedStarter.name)
}()
log.Trace("PersistableChannelQueue: %s Done main loop", p.delayedStarter.name)
}
// Flush flushes the queue and blocks till the queue is empty
func (p *PersistableChannelQueue) Flush(timeout time.Duration) error {
var ctx context.Context
var cancel context.CancelFunc
if timeout > 0 {
ctx, cancel = context.WithTimeout(context.Background(), timeout)
} else {
ctx, cancel = context.WithCancel(context.Background())
}
defer cancel()
return p.FlushWithContext(ctx)
}
// FlushWithContext flushes the queue and blocks till the queue is empty
func (p *PersistableChannelQueue) FlushWithContext(ctx context.Context) error {
errChan := make(chan error, 1)
go func() {
errChan <- p.channelQueue.FlushWithContext(ctx)
}()
go func() {
p.lock.Lock()
if p.internal == nil {
p.lock.Unlock()
errChan <- fmt.Errorf("not ready to flush internal queue %s yet", p.Name())
return
}
p.lock.Unlock()
errChan <- p.internal.FlushWithContext(ctx)
}()
err1 := <-errChan
err2 := <-errChan
if err1 != nil {
return err1
}
return err2
}
// IsEmpty checks if a queue is empty
func (p *PersistableChannelQueue) IsEmpty() bool {
if !p.channelQueue.IsEmpty() {
return false
}
p.lock.Lock()
defer p.lock.Unlock()
if p.internal == nil {
return false
}
return p.internal.IsEmpty()
}
// Shutdown processing this queue
func (p *PersistableChannelQueue) Shutdown() {
log.Trace("PersistableChannelQueue: %s Shutdown", p.delayedStarter.name)
log.Trace("PersistableChannelQueue: %s Shutting down", p.delayedStarter.name)
select {
case <-p.closed:
default:
@@ -177,6 +239,7 @@ func (p *PersistableChannelQueue) Shutdown() {
}
close(p.closed)
}
log.Debug("PersistableChannelQueue: %s Shutdown", p.delayedStarter.name)
}
// Terminate this queue and close the queue
@@ -188,6 +251,7 @@ func (p *PersistableChannelQueue) Terminate() {
if p.internal != nil {
p.internal.(*LevelQueue).Terminate()
}
log.Debug("PersistableChannelQueue: %s Terminated", p.delayedStarter.name)
}
func init() {