[#378] shard: Control the completion of all handlers of the previous event

Group handlers of the particular event to a WaitGroup and wait for it before
the next event handling. This will ensure that all handlers complete and
prevent potential conflicts between past and present jobs.

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
This commit is contained in:
Leonard Lyubich 2021-02-16 15:17:37 +03:00 committed by Alex Vanin
parent 18add24727
commit a9a1acc880

View file

@ -2,6 +2,7 @@ package shard
import (
"context"
"sync"
"time"
"github.com/nspcc-dev/neofs-api-go/pkg/object"
@ -25,6 +26,8 @@ const (
type eventHandler func(context.Context, Event)
type eventHandlers struct {
prevGroup sync.WaitGroup
cancelFunc context.CancelFunc
handlers []eventHandler
@ -97,18 +100,24 @@ func (gc *gc) listenEvents() {
}
v.cancelFunc()
v.prevGroup.Wait()
var ctx context.Context
ctx, v.cancelFunc = context.WithCancel(context.Background())
v.prevGroup.Add(len(v.handlers))
for _, h := range v.handlers {
err := gc.workerPool.Submit(func() {
h(ctx, event)
v.prevGroup.Done()
})
if err != nil {
gc.log.Warn("could not submit GC job to worker pool",
zap.String("error", err.Error()),
)
v.prevGroup.Done()
}
}
}