forked from jakobkrein/logrus-splunk-hook
/
hook.go
54 lines (48 loc) · 1.21 KB
/
hook.go
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package splunk
import (
"fmt"
"os"
"github.com/sirupsen/logrus"
)
// Hook is a logrus hook for splunk
type Hook struct {
Client *Client
levels []logrus.Level
formatter *logrus.JSONFormatter
async bool
retries int
}
// NewHook creates new hook
// client: splunk client instance (use NewClient),
// level: log level,
// async: logs are send to splunk in async method in a different gorutine,
// retries: max retries to send logs to splunk if fails
func NewHook(client *Client, levels []logrus.Level, async bool, retries int) *Hook {
if retries <= 0 {
retries = 0
}
return &Hook{client, levels, &logrus.JSONFormatter{}, async, retries}
}
// Fire triggers a splunk event
func (h *Hook) Fire(entry *logrus.Entry) error {
line, err := h.formatter.Format(entry)
preparedEntry := string(line)
if err != nil {
return err
}
if h.async && entry.Level > logrus.FatalLevel {
go func() {
err = h.Client.Log(preparedEntry, h.retries)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to fire hook: %v\n", err)
}
}()
} else {
err = h.Client.Log(preparedEntry, h.retries)
}
return err
}
// Levels Required for logrus hook implementation
func (h *Hook) Levels() []logrus.Level {
return h.levels
}