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log.go
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log.go
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package logs
import (
"fmt"
"net/url"
"context"
"github.com/fnproject/fn/api/common"
"github.com/fnproject/fn/api/logs/metrics"
"github.com/fnproject/fn/api/logs/validator"
"github.com/fnproject/fn/api/models"
"github.com/sirupsen/logrus"
)
// Provider defines a source that can create log stores
type Provider interface {
fmt.Stringer
// Supports indicates if this provider can handle a specific URL scheme
Supports(url *url.URL) bool
//Create a new log store from the corresponding URL
New(ctx context.Context, url *url.URL) (models.LogStore, error)
}
var providers []Provider
// Register globally registers a new LogStore provider
func Register(pf Provider) {
logrus.Infof("Registering log provider '%s'", pf)
providers = append(providers, pf)
}
// New Creates a new log store based on a given URL
func New(ctx context.Context, dbURL string) (models.LogStore, error) {
log := common.Logger(ctx)
u, err := url.Parse(dbURL)
if err != nil {
log.WithError(err).WithFields(logrus.Fields{"url": dbURL}).Fatal("bad DB URL")
}
log.WithFields(logrus.Fields{"db": u.Scheme}).Debug("creating log store")
for _, p := range providers {
if p.Supports(u) {
return p.New(ctx, u)
}
}
return nil, fmt.Errorf("no log store provider available for url %s", dbURL)
}
func Wrap(ls models.LogStore) models.LogStore {
return validator.NewValidator(metrics.NewLogstore(ls))
}