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lifecycle.go
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lifecycle.go
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package sidecar
import (
"context"
sharedutil "github.com/argoproj-labs/argo-dataflow/shared/util"
"sync"
"time"
)
var (
preStopCh = make(chan bool, 16)
beforeClosers []func(ctx context.Context) error // should be closed before main container exits
afterClosers []func(ctx context.Context) error // should be close after the main container exits
preStopMu = sync.Mutex{}
)
func preStop() {
logger.Info("pre-stop")
preStopMu.Lock()
defer preStopMu.Unlock()
closeClosers(beforeClosers)
beforeClosers = nil
preStopCh <- true
logger.Info("pre-stop done")
}
func stop() {
closeClosers(afterClosers)
}
func closeClosers(closers []func(ctx context.Context) error) {
if len(closers) == 0 {
return // if this is already done, lets return early to avoid excess logging
}
start := time.Now()
logger.Info("closing closers", "len", len(closers))
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
defer cancel()
for i := len(closers) - 1; i >= 0; i-- {
f := closers[i]
n := sharedutil.GetFuncName(f)
logger.Info("closing", "i", i, "func", n)
if err := f(ctx); err != nil {
logger.Error(err, "failed to close", "i", i, "func", n)
}
}
logger.Info("closing took", "duration", time.Since(start))
}