Milo: pRPC endpoint for getting Buildbot master data

milo/appengine/buildbot/grpc.go

+// Copyright 2016 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 buildbot
+
+import (
+        "google.golang.org/grpc"
+        "google.golang.org/grpc/codes"
+
+        "github.com/luci/luci-go/common/proto/google"
+        milo "github.com/luci/luci-go/milo/api/proto"
+        "golang.org/x/net/context"
+)
+
+type BuildbotService struct{}
+
+var errNotFoundGRPC = grpc.Errorf(codes.NotFound, "Master Not Found")
+
+func (s *BuildbotService) GetCompressedMasterJSON(
+        c context.Context, req *milo.MasterRequest) (*milo.CompressedMasterJSON, error) {
+
+        if req.Name == "" {
+                return nil, grpc.Errorf(codes.InvalidArgument, "No master specified")
+        }
+
+        entry, err := getMasterEntry(c, req.Name)
+        switch {
+        case err == errMasterNotFound:
+                return nil, errNotFoundGRPC
+
+        case err != nil:
+                return nil, err
+        }
+
+        return &milo.CompressedMasterJSON{
+                Internal: entry.Internal,
+                Modified: &google.Timestamp{
+                        Seconds: entry.Modified.Unix(),
+                        Nanos:   int32(entry.Modified.Nanosecond()),
+                },
+                Data: entry.Data,
+        }, nil
+}