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|
package logging
import (
"container/ring"
"sync"
"github.com/sirupsen/logrus"
)
// This hook keeps in memory n messages from error to info level
type inMemoryHook struct {
messages *ring.Ring
lock sync.RWMutex
}
func newInMemoryHook(size int) *inMemoryHook {
return &inMemoryHook{
messages: ring.New(size),
}
}
func (h *inMemoryHook) Levels() []logrus.Level {
return []logrus.Level{logrus.InfoLevel, logrus.WarnLevel, logrus.ErrorLevel}
}
func (h *inMemoryHook) Fire(entry *logrus.Entry) error {
h.lock.Lock()
defer h.lock.Unlock()
h.messages.Value = entry.Message
h.messages = h.messages.Next()
return nil
}
func (h *inMemoryHook) Messages() []string {
h.lock.RLock()
defer h.lock.RUnlock()
var ret []string
h.messages.Do(func(elem interface{}) {
if str, ok := elem.(string); ok {
ret = append(ret, str)
}
})
return ret
}
|
