watch/events: Support events on Get/Head operations as well. (#2116)

Fixes #2073

cmd/client-fs_linux.go

@@ -1,7 +1,7 @@
 // +build linux
 
 /*
- * Minio Client (C) 2015 Minio, Inc.
+ * Minio Client (C) 2015, 2016, 2017 Minio, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this fs except in compliance with the License.
@@ -23,34 +23,40 @@ import (
 )
 
 var (
-	// EventTypePut contains the notify events that will cause a put
+	// EventTypePut contains the notify events that will cause a put (write)
 	EventTypePut = []notify.Event{notify.InCloseWrite | notify.InMovedTo}
-	// EventTypeDelete contains the notify events that will cause a delete
+	// EventTypeDelete contains the notify events that will cause a delete (remove)
 	EventTypeDelete = []notify.Event{notify.InDelete | notify.InDeleteSelf | notify.InMovedFrom}
+	// EventTypeGet contains the notify events that will cause a get (read)
+	EventTypeGet = []notify.Event{notify.InAccess | notify.InOpen}
 )
 
+// IsGetEvent checks if the event return is a get event.
+func IsGetEvent(event notify.Event) bool {
+	for _, ev := range EventTypeGet {
+		if event == ev {
+			return true
+		}
+	}
+	return false
+}
+
 // IsPutEvent checks if the event returned is a put event
 func IsPutEvent(event notify.Event) bool {
-	switch event {
-	case notify.InCloseWrite:
-		return true
-	case notify.InMovedTo:
-		return true
+	for _, ev := range EventTypePut {
+		if event == ev {
+			return true
+		}
 	}
-
 	return false
 }
 
 // IsDeleteEvent checks if the event returned is a delete event
 func IsDeleteEvent(event notify.Event) bool {
-	switch event {
-	case notify.InDelete:
-		return true
-	case notify.InDeleteSelf:
-		return true
-	case notify.InMovedFrom:
-		return true
+	for _, ev := range EventTypeDelete {
+		if event == ev {
+			return true
+		}
 	}
-
 	return false
 }