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postponed_functions.go
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postponed_functions.go
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/*
Copyright 2015 Shlomi Noach, courtesy Booking.com
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 inst
import (
"sync"
"github.com/openark/golib/log"
)
type PostponedFunctionsContainer struct {
waitGroup sync.WaitGroup
mutex sync.Mutex
descriptions []string
}
func NewPostponedFunctionsContainer() *PostponedFunctionsContainer {
postponedFunctionsContainer := &PostponedFunctionsContainer{
descriptions: []string{},
}
return postponedFunctionsContainer
}
func (this *PostponedFunctionsContainer) AddPostponedFunction(postponedFunction func() error, description string) {
this.mutex.Lock()
defer this.mutex.Unlock()
this.descriptions = append(this.descriptions, description)
this.waitGroup.Add(1)
go func() {
defer this.waitGroup.Done()
postponedFunction()
}()
}
func (this *PostponedFunctionsContainer) Wait() {
log.Debugf("PostponedFunctionsContainer: waiting on %+v postponed functions", this.Len())
this.waitGroup.Wait()
log.Debugf("PostponedFunctionsContainer: done waiting")
}
func (this *PostponedFunctionsContainer) Len() int {
this.mutex.Lock()
defer this.mutex.Unlock()
return len(this.descriptions)
}
func (this *PostponedFunctionsContainer) Descriptions() []string {
this.mutex.Lock()
defer this.mutex.Unlock()
return this.descriptions
}