/
service.go
67 lines (57 loc) · 1.6 KB
/
service.go
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// Package logger implements github.com/the-anna-project/logger.Service. This
// logger interface is to simply log output to gather runtime information.
package logger
import (
"fmt"
"io"
"io/ioutil"
"time"
kitlog "github.com/go-kit/kit/log"
"github.com/go-stack/stack"
)
// ServiceConfig represents the configuration used to create a new service.
type ServiceConfig struct {
// Settings.
Caller kitlog.Valuer
IOWriter io.Writer
TimestampFormatter kitlog.Valuer
}
// DefaultServiceConfig provides a default configuration to create a new service
// by best effort.
func DefaultServiceConfig() ServiceConfig {
return ServiceConfig{
// Settings.
Caller: func() interface{} {
return fmt.Sprintf("%+v", stack.Caller(4))
},
IOWriter: ioutil.Discard,
TimestampFormatter: func() interface{} {
return time.Now().UTC().Format("06-01-02 15:04:05.000")
},
}
}
// NewService creates a new configured service.
func NewService(config ServiceConfig) (Service, error) {
// Settings.
if config.Caller == nil {
return nil, maskAnyf(invalidConfigError, "caller must not be empty")
}
if config.TimestampFormatter == nil {
return nil, maskAnyf(invalidConfigError, "timestamp formatter must not be empty")
}
kitLogger := kitlog.NewJSONLogger(kitlog.NewSyncWriter(config.IOWriter))
kitLogger = kitlog.NewContext(kitLogger).With(
"caller", config.Caller,
"time", config.TimestampFormatter,
)
newService := &service{
logger: kitLogger,
}
return newService, nil
}
type service struct {
logger Service
}
func (s *service) Log(v ...interface{}) error {
return s.logger.Log(v...)
}