/
grpc.go
106 lines (94 loc) · 3.52 KB
/
grpc.go
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package main
import (
"context"
"log"
"net"
"net/url"
"sync"
applicationpb "github.com/fuseml/fuseml-core/gen/grpc/application/pb"
applicationsvr "github.com/fuseml/fuseml-core/gen/grpc/application/server"
codesetpb "github.com/fuseml/fuseml-core/gen/grpc/codeset/pb"
codesetsvr "github.com/fuseml/fuseml-core/gen/grpc/codeset/server"
extensionpb "github.com/fuseml/fuseml-core/gen/grpc/extension/pb"
extensionsvr "github.com/fuseml/fuseml-core/gen/grpc/extension/server"
projectpb "github.com/fuseml/fuseml-core/gen/grpc/project/pb"
projectsvr "github.com/fuseml/fuseml-core/gen/grpc/project/server"
runnablepb "github.com/fuseml/fuseml-core/gen/grpc/runnable/pb"
runnablesvr "github.com/fuseml/fuseml-core/gen/grpc/runnable/server"
workflowpb "github.com/fuseml/fuseml-core/gen/grpc/workflow/pb"
workflowsvr "github.com/fuseml/fuseml-core/gen/grpc/workflow/server"
grpcmiddleware "github.com/grpc-ecosystem/go-grpc-middleware"
grpcmdlwr "goa.design/goa/v3/grpc/middleware"
"goa.design/goa/v3/middleware"
"google.golang.org/grpc"
"google.golang.org/grpc/reflection"
)
// handleGRPCServer starts configures and starts a gRPC server on the given
// URL. It shuts down the server if any error is received in the error channel.
func handleGRPCServer(ctx context.Context, u *url.URL, endpoints *endpoints, wg *sync.WaitGroup, errc chan error, logger *log.Logger, debug bool) {
// Setup goa log adapter.
var (
adapter middleware.Logger
)
{
adapter = middleware.NewLogger(logger)
}
// Wrap the endpoints with the transport specific layers. The generated
// server packages contains code generated from the design which maps
// the service input and output data structures to gRPC requests and
// responses.
var (
applicationServer *applicationsvr.Server
runnableServer *runnablesvr.Server
codesetServer *codesetsvr.Server
projectServer *projectsvr.Server
workflowServer *workflowsvr.Server
extensionServer *extensionsvr.Server
)
{
applicationServer = applicationsvr.New(endpoints.application, nil)
runnableServer = runnablesvr.New(endpoints.runnable, nil)
codesetServer = codesetsvr.New(endpoints.codeset, nil)
projectServer = projectsvr.New(endpoints.project, nil)
workflowServer = workflowsvr.New(endpoints.workflow, nil)
extensionServer = extensionsvr.New(endpoints.extension, nil)
}
// Initialize gRPC server with the middleware.
srv := grpc.NewServer(
grpcmiddleware.WithUnaryServerChain(
grpcmdlwr.UnaryRequestID(),
grpcmdlwr.UnaryServerLog(adapter),
),
)
// Register the servers.
applicationpb.RegisterApplicationServer(srv, applicationServer)
runnablepb.RegisterRunnableServer(srv, runnableServer)
codesetpb.RegisterCodesetServer(srv, codesetServer)
projectpb.RegisterProjectServer(srv, projectServer)
workflowpb.RegisterWorkflowServer(srv, workflowServer)
extensionpb.RegisterExtensionServer(srv, extensionServer)
for svc, info := range srv.GetServiceInfo() {
for _, m := range info.Methods {
logger.Printf("serving gRPC method %s", svc+"/"+m.Name)
}
}
// Register the server reflection service on the server.
// See https://grpc.github.io/grpc/core/md_doc_server-reflection.html.
reflection.Register(srv)
(*wg).Add(1)
go func() {
defer (*wg).Done()
// Start gRPC server in a separate goroutine.
go func() {
lis, err := net.Listen("tcp", u.Host)
if err != nil {
errc <- err
}
logger.Printf("gRPC server listening on %q", u.Host)
errc <- srv.Serve(lis)
}()
<-ctx.Done()
logger.Printf("shutting down gRPC server at %q", u.Host)
srv.Stop()
}()
}