Add server/cache support to gaeconfig.

logdog/appengine/coordinator/hierarchy/hierarchy.go

 // Copyright 2015 The LUCI Authors. All rights reserved.
 // Use of this source code is governed under the Apache License, Version 2.0
 // that can be found in the LICENSE file.
 
 package hierarchy
 
 import (
         "crypto/sha256"
         "encoding/base64"
         "encoding/hex"
 
-        ds "github.com/luci/gae/service/datastore"
         log "github.com/luci/luci-go/common/logging"
         "github.com/luci/luci-go/grpc/grpcutil"
         "github.com/luci/luci-go/logdog/appengine/coordinator"
         "github.com/luci/luci-go/logdog/common/types"
         "github.com/luci/luci-go/luci_config/common/cfgtypes"
 
+        ds "github.com/luci/gae/service/datastore"
+
         "golang.org/x/net/context"
         "google.golang.org/grpc/codes"
 )
 
 // componentEntity is a hierarchial component that stores a specific log path
 // component. A given stream path is broken into components, each of which is
 // represented by a single componentEntity.
 //
 // A componentEntity is keyed based on its path component name and the hash of
 // its parent component's path. This ensures that the set of child components
@@ skipping 242 matching lines @@
 
         return ds.NewKey(c, "_StreamNameComponent", string(d), 0, nil), nil
 }
 
 // cursorForKey returns a cursor for the supplied componentID. This cursor will
 // start new queries at the component immediately following this ID.
 func cursorForKey(c context.Context, e *componentEntity) string {
         key := ds.KeyForObj(c, e)
         return base64.URLEncoding.EncodeToString([]byte(key.StringID()))
 }