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provider.go
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/
provider.go
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package scheduler
import (
"io"
"io/ioutil"
"os"
"gopkg.in/yaml.v2"
)
// Provider provides a schedule.
type Provider interface {
Provide() (Schedule, error)
}
// MemProvider provides a schedule from given Schedule.
type MemProvider struct {
Schedule Schedule
}
func (mp *MemProvider) Provide() (Schedule, error) {
return mp.Schedule, nil
}
// FileProvider provides a schedule from a file.
type FileProvider struct {
Filename string
}
func (fp *FileProvider) Provide() (Schedule, error) {
file, err := os.Open(fp.Filename)
if err != nil {
return nil, err
}
defer file.Close()
return Provide(file)
}
// Provide obtains a schedule from a r.
func Provide(r io.Reader) (Schedule, error) {
data, err := ioutil.ReadAll(r)
if err != nil {
return nil, err
}
var sc Schedule
if err = yaml.UnmarshalStrict(data, &sc); err != nil {
return nil, err
}
return sc, nil
}