Added functionality so quadstore is generated per request (if needed) for the new appengine backend \n CR : nobody \n Tests run: unit tests

http/http.go

@@ -26,6 +26,7 @@ import (
 	"github.com/julienschmidt/httprouter"
 
 	"github.com/google/cayley/config"
+	"github.com/google/cayley/db"
 	"github.com/google/cayley/graph"
 )
 
@@ -55,6 +56,10 @@ func findAssetsPath() string {
 		return "."
 	}
 
+	if hasAssets("..") {
+		return ".."
+	}
+
 	gopathPath := os.ExpandEnv("$GOPATH/src/github.com/google/cayley")
 	if hasAssets(gopathPath) {
 		return gopathPath
@@ -105,6 +110,25 @@ type API struct {
 	handle *graph.Handle
 }
 
+func (api *API) GetHandleForRequest(r *http.Request) (*graph.Handle, error) {
+	if !api.config.RequiresHTTPRequestContext {
+		return api.handle, nil
+	}
+
+	opts := make(graph.Options)
+	opts["HTTPRequest"] = r
+
+	qs, err := graph.NewQuadStoreForRequest(api.handle.QuadStore, opts)
+	if err != nil {
+		return nil, err
+	}
+	qw, err := db.OpenQuadWriter(qs, api.config)
+	if err != nil {
+		return nil, err
+	}
+	return &graph.Handle{QuadStore: qs, QuadWriter: qw}, nil
+}
+
 func (api *API) APIv1(r *httprouter.Router) {
 	r.POST("/api/v1/query/:query_lang", LogRequest(api.ServeV1Query))
 	r.POST("/api/v1/shape/:query_lang", LogRequest(api.ServeV1Shape))