LogDog: Add project namespace to service endpoint.

appengine/logdog/coordinator/endpoints/services/service.go

Index: appengine/logdog/coordinator/endpoints/services/service.go
diff --git a/appengine/logdog/coordinator/endpoints/services/service.go b/appengine/logdog/coordinator/endpoints/services/service.go
index cf4e37403bf31c2365bd600cead3aba080074f61..1be8d13d2038ce87e423146154aac0f14b93eb4c 100644
--- a/appengine/logdog/coordinator/endpoints/services/service.go
+++ b/appengine/logdog/coordinator/endpoints/services/service.go
@@ -7,7 +7,9 @@ package services
 import (
 	"github.com/golang/protobuf/proto"
 	"github.com/luci/luci-go/appengine/logdog/coordinator"
+	"github.com/luci/luci-go/appengine/logdog/coordinator/endpoints"
 	"github.com/luci/luci-go/common/api/logdog_coordinator/services/v1"
+	"github.com/luci/luci-go/common/config"
 	"github.com/luci/luci-go/common/grpcutil"
 	log "github.com/luci/luci-go/common/logging"
 	"golang.org/x/net/context"
@@ -34,6 +36,16 @@ func New() logdog.ServicesServer {
 				}
 				return nil, grpcutil.PermissionDenied
 			}
+
+			// Enter a datastore namespace based on the message type.
+			//
+			// We use a type switch here because this is a shared decorator.
+			if pbm, ok := req.(endpoints.ProjectBoundMessage); ok {
+				if err := coordinator.WithProjectNamespace(&c, config.ProjectName(pbm.GetMessageProject())); err != nil {
+					return nil, grpcutil.Internal
+				}
+			}
+
 			return c, nil
 		},
 	}