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Improve queue and logger context (#24924)

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Before there was a "graceful function": RunWithShutdownFns, it's mainly
for some modules which doesn't support context.

The old queue system doesn't work well with context, so the old queues
need it.

After the queue refactoring, the new queue works with context well, so,
use Golang context as much as possible, the `RunWithShutdownFns` could
be removed (replaced by RunWithCancel for context cancel mechanism), the
related code could be simplified.

This PR also fixes some legacy queue-init problems, eg:

* typo : archiver: "unable to create codes indexer queue" => "unable to
create repo-archive queue"
* no nil check for failed queues, which causes unfriendly panic

After this PR, many goroutines could have better display name:

![image](701b2a9b-8065-4137-aeaa-0bda2b34604a)

![image](f1d5f50f-0534-40f0-b0be-f2c9daa5fe92)
This commit is contained in:
wxiaoguang 2023-05-26 15:31:55 +08:00 • committed by GitHub
parent e4922d484b
commit 18f26cfbf7
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31 changed files with 204 additions and 263 deletions
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33
modules/queue/workerqueue.go
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@ -10,9 +10,9 @@ import (
"sync/atomic"
"time"
"code.gitea.io/gitea/modules/graceful"
"code.gitea.io/gitea/modules/json"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/process"
"code.gitea.io/gitea/modules/setting"
)
@ -21,8 +21,9 @@ import (
type WorkerPoolQueue[T any] struct {
ctxRun context.Context
ctxRunCancel context.CancelFunc
ctxShutdown atomic.Pointer[context.Context]
shutdownDone chan struct{}
shutdownDone chan struct{}
shutdownTimeout atomic.Int64 // in case some buggy handlers (workers) would hang forever, "shutdown" should finish in predictable time
origHandler HandlerFuncT[T]
safeHandler HandlerFuncT[T]
@ -175,22 +176,19 @@ func (q *WorkerPoolQueue[T]) Has(data T) (bool, error) {
return q.baseQueue.HasItem(q.ctxRun, q.marshal(data))
}
func (q *WorkerPoolQueue[T]) Run(atShutdown, atTerminate func(func())) {
atShutdown(func() {
// in case some queue handlers are slow or have hanging bugs, at most wait for a short time
q.ShutdownWait(1 * time.Second)
})
func (q *WorkerPoolQueue[T]) Run() {
q.doRun()
}
func (q *WorkerPoolQueue[T]) Cancel() {
q.ctxRunCancel()
}
// ShutdownWait shuts down the queue, waits for all workers to finish their jobs, and pushes the unhandled items back to the base queue
// It waits for all workers (handlers) to finish their jobs, in case some buggy handlers would hang forever, a reasonable timeout is needed
func (q *WorkerPoolQueue[T]) ShutdownWait(timeout time.Duration) {
shutdownCtx, shutdownCtxCancel := context.WithTimeout(context.Background(), timeout)
defer shutdownCtxCancel()
if q.ctxShutdown.CompareAndSwap(nil, &shutdownCtx) {
q.ctxRunCancel()
}
q.shutdownTimeout.Store(int64(timeout))
q.ctxRunCancel()
<-q.shutdownDone
}
@ -207,7 +205,11 @@ func getNewQueueFn(t string) (string, func(cfg *BaseConfig, unique bool) (baseQu
}
}
func NewWorkerPoolQueueBySetting[T any](name string, queueSetting setting.QueueSettings, handler HandlerFuncT[T], unique bool) (*WorkerPoolQueue[T], error) {
func newWorkerPoolQueueForTest[T any](name string, queueSetting setting.QueueSettings, handler HandlerFuncT[T], unique bool) (*WorkerPoolQueue[T], error) {
return NewWorkerPoolQueueWithContext(context.Background(), name, queueSetting, handler, unique)
}
func NewWorkerPoolQueueWithContext[T any](ctx context.Context, name string, queueSetting setting.QueueSettings, handler HandlerFuncT[T], unique bool) (*WorkerPoolQueue[T], error) {
if handler == nil {
log.Debug("Use dummy queue for %q because handler is nil and caller doesn't want to process the queue items", name)
queueSetting.Type = "dummy"
@ -224,10 +226,11 @@ func NewWorkerPoolQueueBySetting[T any](name string, queueSetting setting.QueueS
}
log.Trace("Created queue %q of type %q", name, queueType)
w.ctxRun, w.ctxRunCancel = context.WithCancel(graceful.GetManager().ShutdownContext())
w.ctxRun, _, w.ctxRunCancel = process.GetManager().AddTypedContext(ctx, "Queue: "+w.GetName(), process.SystemProcessType, false)
w.batchChan = make(chan []T)
w.flushChan = make(chan flushType)
w.shutdownDone = make(chan struct{})
w.shutdownTimeout.Store(int64(shutdownDefaultTimeout))
w.workerMaxNum = queueSetting.MaxWorkers
w.batchLength = queueSetting.BatchLength