Add a Ping() method to the trace service to make it easier to detect if the service is up and runni…

trace/service/traceservice.pb.go

 // Code generated by protoc-gen-go.
 // source: traceservice.proto
 // DO NOT EDIT!
 
 /*
 Package traceservice is a generated protocol buffer package.
 
 It is generated from these files:
         traceservice.proto
 
 It has these top-level messages:
-        EmptyResponse
+        Empty
         CommitID
         Params
         MissingParamsRequest
         MissingParamsResponse
         AddParamsRequest
         StoredEntry
         AddRequest
         RemoveRequest
         ListRequest
         ListResponse
@@ skipping 11 matching lines @@
 import (
         context "golang.org/x/net/context"
         grpc "google.golang.org/grpc"
 )
 
 // Reference imports to suppress errors if they are not otherwise used.
 var _ = proto.Marshal
 var _ = fmt.Errorf
 var _ = math.Inf
 
-type EmptyResponse struct {
+type Empty struct {
 }
 
-func (m *EmptyResponse) Reset()         { *m = EmptyResponse{} }
-func (m *EmptyResponse) String() string { return proto.CompactTextString(m) }
-func (*EmptyResponse) ProtoMessage()    {}
+func (m *Empty) Reset()         { *m = Empty{} }
+func (m *Empty) String() string { return proto.CompactTextString(m) }
+func (*Empty) ProtoMessage()    {}
 
 // CommitID identifies one commit, or trybot try.
 type CommitID struct {
         // The id of a commit, either a git hash, or a Reitveld patch id.
         Id string `protobuf:"bytes,1,opt,name=id" json:"id,omitempty"`
         // The source of the commit, either a git branch name, or a Reitveld issue id.
         Source string `protobuf:"bytes,2,opt,name=source" json:"source,omitempty"`
         // The timestamp of the commit or trybot patch.
         Timestamp int64 `protobuf:"varint,3,opt,name=timestamp" json:"timestamp,omitempty"`
 }
@@ skipping 198 matching lines @@
 // Reference imports to suppress errors if they are not otherwise used.
 var _ context.Context
 var _ grpc.ClientConn
 
 // Client API for TraceService service
 
 type TraceServiceClient interface {
         // Returns a list of traceids that don't have Params stored in the datastore.
         MissingParams(ctx context.Context, in *MissingParamsRequest, opts ...grpc.CallOption) (*MissingParamsResponse, error)
         // Adds Params for a set of traceids.
-        AddParams(ctx context.Context, in *AddParamsRequest, opts ...grpc.CallOption) (*EmptyResponse, error)
+        AddParams(ctx context.Context, in *AddParamsRequest, opts ...grpc.CallOption) (*Empty, error)
         // Adds data for a set of traces for a particular commitid.
-        Add(ctx context.Context, in *AddRequest, opts ...grpc.CallOption) (*EmptyResponse, error)
+        Add(ctx context.Context, in *AddRequest, opts ...grpc.CallOption) (*Empty, error)
         // Removes data for a particular commitid.
-        Remove(ctx context.Context, in *RemoveRequest, opts ...grpc.CallOption) (*EmptyResponse, error)
+        Remove(ctx context.Context, in *RemoveRequest, opts ...grpc.CallOption) (*Empty, error)
         // List returns all the CommitIDs that exist in the given time range.
         List(ctx context.Context, in *ListRequest, opts ...grpc.CallOption) (*ListResponse, error)
         // GetValues returns all the trace values stored for the given CommitID.
         GetValues(ctx context.Context, in *GetValuesRequest, opts ...grpc.CallOption) (*GetValuesResponse, error)
         // GetParams returns the Params for all of the given traces.
         GetParams(ctx context.Context, in *GetParamsRequest, opts ...grpc.CallOption) (*GetParamsResponse, error)
+        // Ping returns the Params for all of the given traces.
+        Ping(ctx context.Context, in *GetParamsRequest, opts ...grpc.CallOption) (*Empty, error)
 }
 
 type traceServiceClient struct {
         cc *grpc.ClientConn
 }
 
 func NewTraceServiceClient(cc *grpc.ClientConn) TraceServiceClient {
         return &traceServiceClient{cc}
 }
 
 func (c *traceServiceClient) MissingParams(ctx context.Context, in *MissingParamsRequest, opts ...grpc.CallOption) (*MissingParamsResponse, error) {
         out := new(MissingParamsResponse)
         err := grpc.Invoke(ctx, "/traceservice.TraceService/MissingParams", in, out, c.cc, opts...)
         if err != nil {
                 return nil, err
         }
         return out, nil
 }
 
-func (c *traceServiceClient) AddParams(ctx context.Context, in *AddParamsRequest, opts ...grpc.CallOption) (*EmptyResponse, error) {
-        out := new(EmptyResponse)
+func (c *traceServiceClient) AddParams(ctx context.Context, in *AddParamsRequest, opts ...grpc.CallOption) (*Empty, error) {
+        out := new(Empty)
         err := grpc.Invoke(ctx, "/traceservice.TraceService/AddParams", in, out, c.cc, opts...)
         if err != nil {
                 return nil, err
         }
         return out, nil
 }
 
-func (c *traceServiceClient) Add(ctx context.Context, in *AddRequest, opts ...grpc.CallOption) (*EmptyResponse, error) {
-        out := new(EmptyResponse)
+func (c *traceServiceClient) Add(ctx context.Context, in *AddRequest, opts ...grpc.CallOption) (*Empty, error) {
+        out := new(Empty)
         err := grpc.Invoke(ctx, "/traceservice.TraceService/Add", in, out, c.cc, opts...)
         if err != nil {
                 return nil, err
         }
         return out, nil
 }
 
-func (c *traceServiceClient) Remove(ctx context.Context, in *RemoveRequest, opts ...grpc.CallOption) (*EmptyResponse, error) {
-        out := new(EmptyResponse)
+func (c *traceServiceClient) Remove(ctx context.Context, in *RemoveRequest, opts ...grpc.CallOption) (*Empty, error) {
+        out := new(Empty)
         err := grpc.Invoke(ctx, "/traceservice.TraceService/Remove", in, out, c.cc, opts...)
         if err != nil {
                 return nil, err
         }
         return out, nil
 }
 
 func (c *traceServiceClient) List(ctx context.Context, in *ListRequest, opts ...grpc.CallOption) (*ListResponse, error) {
         out := new(ListResponse)
         err := grpc.Invoke(ctx, "/traceservice.TraceService/List", in, out, c.cc, opts...)
@@ skipping 14 matching lines @@
 
 func (c *traceServiceClient) GetParams(ctx context.Context, in *GetParamsRequest, opts ...grpc.CallOption) (*GetParamsResponse, error) {
         out := new(GetParamsResponse)
         err := grpc.Invoke(ctx, "/traceservice.TraceService/GetParams", in, out, c.cc, opts...)
         if err != nil {
                 return nil, err
         }
         return out, nil
 }
 
+func (c *traceServiceClient) Ping(ctx context.Context, in *GetParamsRequest, opts ...grpc.CallOption) (*Empty, error) {
+        out := new(Empty)
+        err := grpc.Invoke(ctx, "/traceservice.TraceService/Ping", in, out, c.cc, opts...)
+        if err != nil {
+                return nil, err
+        }
+        return out, nil
+}
+
 // Server API for TraceService service
 
 type TraceServiceServer interface {
         // Returns a list of traceids that don't have Params stored in the datastore.
         MissingParams(context.Context, *MissingParamsRequest) (*MissingParamsResponse, error)
         // Adds Params for a set of traceids.
-        AddParams(context.Context, *AddParamsRequest) (*EmptyResponse, error)
+        AddParams(context.Context, *AddParamsRequest) (*Empty, error)
         // Adds data for a set of traces for a particular commitid.
-        Add(context.Context, *AddRequest) (*EmptyResponse, error)
+        Add(context.Context, *AddRequest) (*Empty, error)
         // Removes data for a particular commitid.
-        Remove(context.Context, *RemoveRequest) (*EmptyResponse, error)
+        Remove(context.Context, *RemoveRequest) (*Empty, error)
         // List returns all the CommitIDs that exist in the given time range.
         List(context.Context, *ListRequest) (*ListResponse, error)
         // GetValues returns all the trace values stored for the given CommitID.
         GetValues(context.Context, *GetValuesRequest) (*GetValuesResponse, error)
         // GetParams returns the Params for all of the given traces.
         GetParams(context.Context, *GetParamsRequest) (*GetParamsResponse, error)
+        // Ping returns the Params for all of the given traces.
+        Ping(context.Context, *GetParamsRequest) (*Empty, error)
 }
 
 func RegisterTraceServiceServer(s *grpc.Server, srv TraceServiceServer) {
         s.RegisterService(&_TraceService_serviceDesc, srv)
 }
 
 func _TraceService_MissingParams_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error) (interface{}, error) {
         in := new(MissingParamsRequest)
         if err := dec(in); err != nil {
                 return nil, err
@@ skipping 70 matching lines @@
         if err := dec(in); err != nil {
                 return nil, err
         }
         out, err := srv.(TraceServiceServer).GetParams(ctx, in)
         if err != nil {
                 return nil, err
         }
         return out, nil
 }
 
+func _TraceService_Ping_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error) (interface{}, error) {
+        in := new(GetParamsRequest)
+        if err := dec(in); err != nil {
+                return nil, err
+        }
+        out, err := srv.(TraceServiceServer).Ping(ctx, in)
+        if err != nil {
+                return nil, err
+        }
+        return out, nil
+}
+
 var _TraceService_serviceDesc = grpc.ServiceDesc{
         ServiceName: "traceservice.TraceService",
         HandlerType: (*TraceServiceServer)(nil),
         Methods: []grpc.MethodDesc{
                 {
                         MethodName: "MissingParams",
                         Handler:    _TraceService_MissingParams_Handler,
                 },
                 {
                         MethodName: "AddParams",
@@ skipping 12 matching lines @@
                         Handler:    _TraceService_List_Handler,
                 },
                 {
                         MethodName: "GetValues",
                         Handler:    _TraceService_GetValues_Handler,
                 },
                 {
                         MethodName: "GetParams",
                         Handler:    _TraceService_GetParams_Handler,
                 },
+                {
+                        MethodName: "Ping",
+                        Handler:    _TraceService_Ping_Handler,
+                },
         },
         Streams: []grpc.StreamDesc{},
 }