/
common.go
64 lines (54 loc) · 1.63 KB
/
common.go
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// Copyright (c) 2021 Terminus, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package input
import (
"context"
"time"
"github.com/sirupsen/logrus"
"github.com/erda-project/erda/modules/eventbox/dispatcher/errors"
"github.com/erda-project/erda/modules/eventbox/types"
"github.com/erda-project/erda/pkg/dlock"
)
type Handler func(*types.Message) *errors.DispatchError
func OnlyOne(ctx context.Context, lock *dlock.DLock) (func(), error) {
var isCanceled bool
var locked bool
cleanup := func() {
if isCanceled {
return
}
logrus.Infof("Onlyone: etcdlock: unlock, key: %s", lock.Key())
if err := lock.Unlock(); err != nil {
logrus.Errorf("Onlyone: etcdlock unlock err: %v", err)
return
}
}
go func() {
time.Sleep(3 * time.Second)
if !locked && !isCanceled {
logrus.Warnf("Onlyone: not get lock yet after 3s")
}
}()
if err := lock.Lock(ctx); err != nil {
if err == context.Canceled {
isCanceled = true
logrus.Infof("Onlyone: etcdlock: %v", err)
return cleanup, nil
}
return cleanup, err
}
locked = true
logrus.Infof("Onlyone: etcdlock: lock, key: %s", lock.Key())
return cleanup, nil
}