Make rawdatastore API safer for writing filters.

service/info/interface.go

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package info
 
 import (
         "time"
 
         "golang.org/x/net/context"
 )
 
 // Interface is the interface for all of the package methods which normally
 // would be in the 'appengine' package.
 type Interface interface {
         AppID() string
+        GetNamespace() string
+
         Datacenter() string
         DefaultVersionHostname() string
         InstanceID() string
         IsDevAppServer() bool
         IsOverQuota(err error) bool
         IsTimeoutError(err error) bool
         ModuleHostname(module, version, instance string) (string, error)
         ModuleName() string
         RequestID() string
         ServerSoftware() string
         ServiceAccount() (string, error)
         VersionID() string
 
         Namespace(namespace string) (context.Context, error)
 
         AccessToken(scopes ...string) (token string, expiry time.Time, err error)
         PublicCertificates() ([]Certificate, error)
         SignBytes(bytes []byte) (keyName string, signature []byte, err error)
 }