This update provides:
1) workaround around the build failures. In
summary, it forces the download of some packages during the build
process.
2) update the set of packages that should go inside the vendor
directory
3) Update the dockerfile to use go 1.10
Change-Id: I2bfd090ce0f25b0c10aa214755ae2da7e5384d60
diff --git a/vendor/google.golang.org/grpc/health/server.go b/vendor/google.golang.org/grpc/health/server.go
new file mode 100644
index 0000000..c86e499
--- /dev/null
+++ b/vendor/google.golang.org/grpc/health/server.go
@@ -0,0 +1,125 @@
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+//go:generate ./regenerate.sh
+
+// Package health provides a service that exposes server's health and it must be
+// imported to enable support for client-side health checks.
+package health
+
+import (
+ "context"
+ "sync"
+
+ "google.golang.org/grpc/codes"
+ healthgrpc "google.golang.org/grpc/health/grpc_health_v1"
+ healthpb "google.golang.org/grpc/health/grpc_health_v1"
+ "google.golang.org/grpc/status"
+)
+
+// Server implements `service Health`.
+type Server struct {
+ mu sync.Mutex
+ // statusMap stores the serving status of the services this Server monitors.
+ statusMap map[string]healthpb.HealthCheckResponse_ServingStatus
+ updates map[string]map[healthgrpc.Health_WatchServer]chan healthpb.HealthCheckResponse_ServingStatus
+}
+
+// NewServer returns a new Server.
+func NewServer() *Server {
+ return &Server{
+ statusMap: map[string]healthpb.HealthCheckResponse_ServingStatus{"": healthpb.HealthCheckResponse_SERVING},
+ updates: make(map[string]map[healthgrpc.Health_WatchServer]chan healthpb.HealthCheckResponse_ServingStatus),
+ }
+}
+
+// Check implements `service Health`.
+func (s *Server) Check(ctx context.Context, in *healthpb.HealthCheckRequest) (*healthpb.HealthCheckResponse, error) {
+ s.mu.Lock()
+ defer s.mu.Unlock()
+ if servingStatus, ok := s.statusMap[in.Service]; ok {
+ return &healthpb.HealthCheckResponse{
+ Status: servingStatus,
+ }, nil
+ }
+ return nil, status.Error(codes.NotFound, "unknown service")
+}
+
+// Watch implements `service Health`.
+func (s *Server) Watch(in *healthpb.HealthCheckRequest, stream healthgrpc.Health_WatchServer) error {
+ service := in.Service
+ // update channel is used for getting service status updates.
+ update := make(chan healthpb.HealthCheckResponse_ServingStatus, 1)
+ s.mu.Lock()
+ // Puts the initial status to the channel.
+ if servingStatus, ok := s.statusMap[service]; ok {
+ update <- servingStatus
+ } else {
+ update <- healthpb.HealthCheckResponse_SERVICE_UNKNOWN
+ }
+
+ // Registers the update channel to the correct place in the updates map.
+ if _, ok := s.updates[service]; !ok {
+ s.updates[service] = make(map[healthgrpc.Health_WatchServer]chan healthpb.HealthCheckResponse_ServingStatus)
+ }
+ s.updates[service][stream] = update
+ defer func() {
+ s.mu.Lock()
+ delete(s.updates[service], stream)
+ s.mu.Unlock()
+ }()
+ s.mu.Unlock()
+
+ var lastSentStatus healthpb.HealthCheckResponse_ServingStatus = -1
+ for {
+ select {
+ // Status updated. Sends the up-to-date status to the client.
+ case servingStatus := <-update:
+ if lastSentStatus == servingStatus {
+ continue
+ }
+ lastSentStatus = servingStatus
+ err := stream.Send(&healthpb.HealthCheckResponse{Status: servingStatus})
+ if err != nil {
+ return status.Error(codes.Canceled, "Stream has ended.")
+ }
+ // Context done. Removes the update channel from the updates map.
+ case <-stream.Context().Done():
+ return status.Error(codes.Canceled, "Stream has ended.")
+ }
+ }
+}
+
+// SetServingStatus is called when need to reset the serving status of a service
+// or insert a new service entry into the statusMap.
+func (s *Server) SetServingStatus(service string, servingStatus healthpb.HealthCheckResponse_ServingStatus) {
+ s.mu.Lock()
+ defer s.mu.Unlock()
+
+ s.statusMap[service] = servingStatus
+ for _, update := range s.updates[service] {
+ // Clears previous updates, that are not sent to the client, from the channel.
+ // This can happen if the client is not reading and the server gets flow control limited.
+ select {
+ case <-update:
+ default:
+ }
+ // Puts the most recent update to the channel.
+ update <- servingStatus
+ }
+}