Mats Törnberg
f5014fe906
Co-authored-by: matst80 <mats.tornberg@gmail.com> Reviewed-on: https://git.tornberg.me/mats/go-cart-actor/pulls/4 Co-authored-by: Mats Törnberg <mats@tornberg.me> Co-committed-by: Mats Törnberg <mats@tornberg.me>
120 lines
3.3 KiB
Go
120 lines
3.3 KiB
Go
package actor
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import (
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"context"
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"fmt"
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"log"
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"net"
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"time"
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messages "git.tornberg.me/go-cart-actor/pkg/messages"
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"google.golang.org/grpc"
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"google.golang.org/grpc/reflection"
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)
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// ControlServer implements the ControlPlane gRPC services.
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// It delegates to a grain pool and cluster operations to a synced pool.
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type ControlServer[V any] struct {
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messages.UnimplementedControlPlaneServer
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pool GrainPool[V]
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}
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func (s *ControlServer[V]) AnnounceOwnership(ctx context.Context, req *messages.OwnershipAnnounce) (*messages.OwnerChangeAck, error) {
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err := s.pool.HandleOwnershipChange(req.Host, req.Ids)
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if err != nil {
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return &messages.OwnerChangeAck{
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Accepted: false,
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Message: "owner change failed",
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}, err
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}
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log.Printf("Ack count: %d", len(req.Ids))
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return &messages.OwnerChangeAck{
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Accepted: true,
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Message: "ownership announced",
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}, nil
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}
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func (s *ControlServer[V]) AnnounceExpiry(ctx context.Context, req *messages.ExpiryAnnounce) (*messages.OwnerChangeAck, error) {
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err := s.pool.HandleRemoteExpiry(req.Host, req.Ids)
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return &messages.OwnerChangeAck{
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Accepted: err == nil,
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Message: "expiry acknowledged",
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}, nil
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}
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// ControlPlane: Ping
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func (s *ControlServer[V]) Ping(ctx context.Context, _ *messages.Empty) (*messages.PingReply, error) {
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// log.Printf("got ping")
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return &messages.PingReply{
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Host: s.pool.Hostname(),
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UnixTime: time.Now().Unix(),
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}, nil
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}
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// ControlPlane: Negotiate (merge host views)
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func (s *ControlServer[V]) Negotiate(ctx context.Context, req *messages.NegotiateRequest) (*messages.NegotiateReply, error) {
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s.pool.Negotiate(req.KnownHosts)
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return &messages.NegotiateReply{Hosts: req.GetKnownHosts()}, nil
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}
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// ControlPlane: GetCartIds (locally owned carts only)
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func (s *ControlServer[V]) GetLocalActorIds(ctx context.Context, _ *messages.Empty) (*messages.ActorIdsReply, error) {
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return &messages.ActorIdsReply{Ids: s.pool.GetLocalIds()}, nil
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}
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// ControlPlane: Closing (peer shutdown notification)
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func (s *ControlServer[V]) Closing(ctx context.Context, req *messages.ClosingNotice) (*messages.OwnerChangeAck, error) {
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if req.GetHost() != "" {
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s.pool.RemoveHost(req.GetHost())
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}
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return &messages.OwnerChangeAck{
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Accepted: true,
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Message: "removed host",
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}, nil
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}
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type ServerConfig struct {
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Addr string
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Options []grpc.ServerOption
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}
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func NewServerConfig(addr string, options ...grpc.ServerOption) ServerConfig {
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return ServerConfig{
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Addr: addr,
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Options: options,
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}
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}
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func DefaultServerConfig() ServerConfig {
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return NewServerConfig(":1337")
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}
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// StartGRPCServer configures and starts the unified gRPC server on the given address.
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// It registers both the CartActor and ControlPlane services.
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func NewControlServer[V any](config ServerConfig, pool GrainPool[V]) (*grpc.Server, error) {
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lis, err := net.Listen("tcp", config.Addr)
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if err != nil {
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return nil, fmt.Errorf("failed to listen: %w", err)
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}
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grpcServer := grpc.NewServer(config.Options...)
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server := &ControlServer[V]{
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pool: pool,
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}
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messages.RegisterControlPlaneServer(grpcServer, server)
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reflection.Register(grpcServer)
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log.Printf("gRPC server listening as %s on %s", pool.Hostname(), config.Addr)
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go func() {
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if err := grpcServer.Serve(lis); err != nil {
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log.Fatalf("failed to serve gRPC: %v", err)
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}
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}()
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return grpcServer, nil
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}
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