use formatters directory

README.md

@@ -321,10 +321,10 @@ The built-in logging formatters are:
     field to `true`.  To force no colored output even if there is a TTY  set the
     `DisableColors` field to `true`
 * `logrus.JSONFormatter`. Logs fields as JSON.
-* `logrus.LogstashFormatter`. Logs fields as Logstash Events (http://logstash.net).
+* `logrus_logstash.LogstashFormatter`. Logs fields as Logstash Events (http://logstash.net).
 
     ```go
-      logrus.SetFormatter(&logrus.LogstashFormatter{Type: “application_name"})
+      logrus.SetFormatter(&logrus_logstash.LogstashFormatter{Type: “application_name"})
     ```
 
 Third party logging formatters:

formatters/logstash/logstash_formatter.go

@@ -1,8 +1,9 @@
-package logrus
+package logrus_logstash
 
 import (
 	"encoding/json"
 	"fmt"
+	"github.com/Sirupsen/logrus"
 	"time"
 )
 
@@ -12,7 +13,7 @@ type LogstashFormatter struct {
 	Type string // if not empty use for logstash type field.
 }
 
-func (f *LogstashFormatter) Format(entry *Entry) ([]byte, error) {
+func (f *LogstashFormatter) Format(entry *logrus.Entry) ([]byte, error) {
 	entry.Data["@version"] = 1
 	entry.Data["@timestamp"] = entry.Time.Format(time.RFC3339)