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predictors.go
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predictors.go
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package agent
import (
"sync"
"github.com/pkg/errors"
dl "github.com/c3sr/dlframework"
"github.com/c3sr/dlframework/framework/predictor"
"golang.org/x/sync/syncmap"
)
var (
predictorServers struct {
syncmap.Map
sync.Mutex
}
)
func GetPredictors(framework dl.FrameworkManifest) ([]predictor.Predictor, error) {
name, err := framework.CanonicalName()
if err != nil {
return nil, err
}
val, ok := predictorServers.Load(name)
if !ok {
log.WithField("framework", framework.MustCanonicalName()).
Warn("cannot find registered predictor server")
return nil, errors.New("cannot find registered predictor server")
}
predictors, ok := val.([]predictor.Predictor)
if !ok {
log.WithField("framework", framework.MustCanonicalName()).
Warn("invalid registered predictor server")
return nil, errors.New("invalid predictor")
}
return predictors, nil
}
func GetPredictor(framework dl.FrameworkManifest) (predictor.Predictor, error) {
predictors, err := GetPredictors(framework)
if err != nil {
return nil, err
}
if len(predictors) == 0 {
return nil, errors.Errorf("no predictor found for framework %v ", framework.GetName())
}
return predictors[0], nil
}
func AddPredictor(framework dl.FrameworkManifest, pred predictor.Predictor) error {
name, err := framework.CanonicalName()
if err != nil {
return err
}
var predictors []predictor.Predictor
predictorServers.Lock()
defer predictorServers.Unlock()
val, ok := predictorServers.Load(name)
if !ok {
predictors = []predictor.Predictor{pred}
} else {
predictors = append(val.([]predictor.Predictor), pred)
}
predictorServers.Store(name, predictors)
return nil
}
func PredictorFrameworks() []dl.FrameworkManifest {
frameworks := []dl.FrameworkManifest{}
predictorServers.Range(func(_ interface{}, val interface{}) bool {
if predictor, ok := val.(predictor.Predictor); ok {
framework, _, _ := predictor.Info()
frameworks = append(frameworks, framework)
}
return true
})
return frameworks
}
func Predictors() []string {
names := []string{}
predictorServers.Range(func(key, _ interface{}) bool {
if name, ok := key.(string); ok {
names = append(names, name)
}
return true
})
return names
}