mirror of
https://codeberg.org/forgejo/forgejo
synced 2024-12-12 06:21:56 +01:00
b1e68f39e7
Backport #23154 There have been a number of reports of PRs being blocked whilst being checked which have been difficult to debug. In investigating #23050 I have realised that whilst the Warn there is somewhat of a miscall there was a real bug in the way that the LevelUniqueQueue was being restored on start-up of the PersistableChannelUniqueQueue. Next there is a conflict in the setting of the internal leveldb queue name - This wasn't being set so it was being overridden by other unique queues. This PR fixes these bugs and adds a testcase. Thanks to @brechtvl for noticing the second issue. Fix #23050 and others Signed-off-by: Andrew Thornton <art27@cantab.net> Co-authored-by: zeripath <art27@cantab.net> Co-authored-by: techknowlogick <techknowlogick@gitea.io> Co-authored-by: delvh <leon@kske.dev>
160 lines
4.2 KiB
Go
160 lines
4.2 KiB
Go
// Copyright 2019 The Gitea Authors. All rights reserved.
|
|
// SPDX-License-Identifier: MIT
|
|
|
|
package queue
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"runtime/pprof"
|
|
"sync/atomic"
|
|
"time"
|
|
|
|
"code.gitea.io/gitea/modules/log"
|
|
)
|
|
|
|
// ChannelQueueType is the type for channel queue
|
|
const ChannelQueueType Type = "channel"
|
|
|
|
// ChannelQueueConfiguration is the configuration for a ChannelQueue
|
|
type ChannelQueueConfiguration struct {
|
|
WorkerPoolConfiguration
|
|
Workers int
|
|
}
|
|
|
|
// ChannelQueue implements Queue
|
|
//
|
|
// A channel queue is not persistable and does not shutdown or terminate cleanly
|
|
// It is basically a very thin wrapper around a WorkerPool
|
|
type ChannelQueue struct {
|
|
*WorkerPool
|
|
shutdownCtx context.Context
|
|
shutdownCtxCancel context.CancelFunc
|
|
terminateCtx context.Context
|
|
terminateCtxCancel context.CancelFunc
|
|
exemplar interface{}
|
|
workers int
|
|
name string
|
|
}
|
|
|
|
// NewChannelQueue creates a memory channel queue
|
|
func NewChannelQueue(handle HandlerFunc, cfg, exemplar interface{}) (Queue, error) {
|
|
configInterface, err := toConfig(ChannelQueueConfiguration{}, cfg)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
config := configInterface.(ChannelQueueConfiguration)
|
|
if config.BatchLength == 0 {
|
|
config.BatchLength = 1
|
|
}
|
|
|
|
terminateCtx, terminateCtxCancel := context.WithCancel(context.Background())
|
|
shutdownCtx, shutdownCtxCancel := context.WithCancel(terminateCtx)
|
|
|
|
queue := &ChannelQueue{
|
|
shutdownCtx: shutdownCtx,
|
|
shutdownCtxCancel: shutdownCtxCancel,
|
|
terminateCtx: terminateCtx,
|
|
terminateCtxCancel: terminateCtxCancel,
|
|
exemplar: exemplar,
|
|
workers: config.Workers,
|
|
name: config.Name,
|
|
}
|
|
queue.WorkerPool = NewWorkerPool(func(data ...Data) []Data {
|
|
unhandled := handle(data...)
|
|
if len(unhandled) > 0 {
|
|
// We can only pushback to the channel if we're paused.
|
|
if queue.IsPaused() {
|
|
atomic.AddInt64(&queue.numInQueue, int64(len(unhandled)))
|
|
go func() {
|
|
for _, datum := range data {
|
|
queue.dataChan <- datum
|
|
}
|
|
}()
|
|
return nil
|
|
}
|
|
}
|
|
return unhandled
|
|
}, config.WorkerPoolConfiguration)
|
|
|
|
queue.qid = GetManager().Add(queue, ChannelQueueType, config, exemplar)
|
|
return queue, nil
|
|
}
|
|
|
|
// Run starts to run the queue
|
|
func (q *ChannelQueue) Run(atShutdown, atTerminate func(func())) {
|
|
pprof.SetGoroutineLabels(q.baseCtx)
|
|
atShutdown(q.Shutdown)
|
|
atTerminate(q.Terminate)
|
|
log.Debug("ChannelQueue: %s Starting", q.name)
|
|
_ = q.AddWorkers(q.workers, 0)
|
|
}
|
|
|
|
// Push will push data into the queue
|
|
func (q *ChannelQueue) Push(data Data) error {
|
|
if !assignableTo(data, q.exemplar) {
|
|
return fmt.Errorf("unable to assign data: %v to same type as exemplar: %v in queue: %s", data, q.exemplar, q.name)
|
|
}
|
|
q.WorkerPool.Push(data)
|
|
return nil
|
|
}
|
|
|
|
// Flush flushes the channel with a timeout - the Flush worker will be registered as a flush worker with the manager
|
|
func (q *ChannelQueue) Flush(timeout time.Duration) error {
|
|
if q.IsPaused() {
|
|
return nil
|
|
}
|
|
ctx, cancel := q.commonRegisterWorkers(1, timeout, true)
|
|
defer cancel()
|
|
return q.FlushWithContext(ctx)
|
|
}
|
|
|
|
// Shutdown processing from this queue
|
|
func (q *ChannelQueue) Shutdown() {
|
|
q.lock.Lock()
|
|
defer q.lock.Unlock()
|
|
select {
|
|
case <-q.shutdownCtx.Done():
|
|
log.Trace("ChannelQueue: %s Already Shutting down", q.name)
|
|
return
|
|
default:
|
|
}
|
|
log.Trace("ChannelQueue: %s Shutting down", q.name)
|
|
go func() {
|
|
log.Trace("ChannelQueue: %s Flushing", q.name)
|
|
// We can't use Cleanup here because that will close the channel
|
|
if err := q.FlushWithContext(q.terminateCtx); err != nil {
|
|
count := atomic.LoadInt64(&q.numInQueue)
|
|
if count > 0 {
|
|
log.Warn("ChannelQueue: %s Terminated before completed flushing", q.name)
|
|
}
|
|
return
|
|
}
|
|
log.Debug("ChannelQueue: %s Flushed", q.name)
|
|
}()
|
|
q.shutdownCtxCancel()
|
|
log.Debug("ChannelQueue: %s Shutdown", q.name)
|
|
}
|
|
|
|
// Terminate this queue and close the queue
|
|
func (q *ChannelQueue) Terminate() {
|
|
log.Trace("ChannelQueue: %s Terminating", q.name)
|
|
q.Shutdown()
|
|
select {
|
|
case <-q.terminateCtx.Done():
|
|
return
|
|
default:
|
|
}
|
|
q.terminateCtxCancel()
|
|
q.baseCtxFinished()
|
|
log.Debug("ChannelQueue: %s Terminated", q.name)
|
|
}
|
|
|
|
// Name returns the name of this queue
|
|
func (q *ChannelQueue) Name() string {
|
|
return q.name
|
|
}
|
|
|
|
func init() {
|
|
queuesMap[ChannelQueueType] = NewChannelQueue
|
|
}
|