forked from goadesign/goa
/
adapter.go
76 lines (63 loc) · 1.85 KB
/
adapter.go
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/*
Package goalogrus contains an adapter that makes it possible to configure goa so it uses logrus
as logger backend.
Usage:
logger := logrus.New()
// Initialize logger handler using logrus package
service.WithLogger(goalogrus.New(logger))
// ... Proceed with configuring and starting the goa service
// In handlers:
goalogrus.Entry(ctx).Info("foo", "bar")
*/
package goalogrus
import (
"fmt"
"golang.org/x/net/context"
"github.com/Sirupsen/logrus"
"github.com/goadesign/goa"
)
// adapter is the logrus goa logger adapter.
type adapter struct {
*logrus.Entry
}
// New wraps a logrus logger into a goa logger.
func New(logger *logrus.Logger) goa.LogAdapter {
return FromEntry(logrus.NewEntry(logger))
}
// FromEntry wraps a logrus log entry into a goa logger.
func FromEntry(entry *logrus.Entry) goa.LogAdapter {
return &adapter{Entry: entry}
}
// Entry returns the logrus log entry stored in the given context if any, nil otherwise.
func Entry(ctx context.Context) *logrus.Entry {
logger := goa.ContextLogger(ctx)
if a, ok := logger.(*adapter); ok {
return a.Entry
}
return nil
}
// Info logs messages using logrus.
func (a *adapter) Info(msg string, data ...interface{}) {
a.Entry.WithFields(data2rus(data)).Info(msg)
}
// Error logs errors using logrus.
func (a *adapter) Error(msg string, data ...interface{}) {
a.Entry.WithFields(data2rus(data)).Error(msg)
}
// New creates a new logger given a context.
func (a *adapter) New(data ...interface{}) goa.LogAdapter {
return &adapter{Entry: a.Entry.WithFields(data2rus(data))}
}
func data2rus(keyvals []interface{}) logrus.Fields {
n := (len(keyvals) + 1) / 2
res := make(logrus.Fields, n)
for i := 0; i < len(keyvals); i += 2 {
k := keyvals[i]
var v interface{} = goa.ErrMissingLogValue
if i+1 < len(keyvals) {
v = keyvals[i+1]
}
res[fmt.Sprintf("%v", k)] = v
}
return res
}