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server.go
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server.go
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package server
import (
"context"
"os"
"sync"
"time"
bg "github.com/quibbble/go-boardgame"
"github.com/quibbble/go-quibbble/internal/datastore"
networking "github.com/quibbble/go-quibbble/internal/networking"
"github.com/quibbble/go-quibbble/pkg/http"
"github.com/quibbble/go-quibbble/pkg/logger"
"github.com/unrolled/render"
)
type Server struct {
cfg Config
server *http.Server
network *networking.GameNetwork
errCh chan error
shutdown sync.Once
}
func NewServer(cfg Config) (*Server, error) {
g := make([]bg.BoardGameBuilder, 0)
a := make([]networking.NetworkAdapter, 0)
for _, game := range cfg.Network.Games {
g = append(g, games[game])
}
gameStore, err := datastore.NewCockroachClient(&cfg.Datastore.Cockroach)
if err != nil {
return nil, err
}
network := networking.NewGameNetwork(networking.GameNetworkOptions{
Games: g,
Adapters: a,
GameExpiry: cfg.Network.GameExpiry,
GameStore: gameStore,
})
handler := NewHandler(render.New(), network, gameStore)
r := NewRouter(cfg.Router)
r = AddRoutes(r, handler)
return &Server{
cfg: cfg,
server: http.NewServer(cfg.Server, r),
network: network,
errCh: make(chan error),
}, nil
}
func (s *Server) Start() {
go s.server.Start(s.errCh)
for err := range s.errCh {
if err != nil {
logger.Log.Error().Caller().Err(err).Msg("fatal error")
s.Shutdown(true)
}
}
}
func (s *Server) Shutdown(errored bool) {
s.shutdown.Do(func() {
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
defer cancel()
logger.Log.Info().Msg("attempting graceful shutdown")
graceful := make(chan bool)
go func(graceful <-chan bool) {
for {
select {
case <-ctx.Done():
logger.Log.Panic().Msg("timeout so shutdown ungracefully")
case <-graceful:
return
}
}
}(graceful)
if err := s.network.Close(ctx); err != nil {
logger.Log.Error().Caller().Err(err).Msg("failed to close out games gracefully")
} else {
logger.Log.Info().Msg("closed all games gracefully")
}
if err := s.server.Shutdown(ctx); err != nil {
logger.Log.Error().Caller().Err(err).Msg("failed to shutdown server gracefully")
} else {
logger.Log.Info().Msg("closed the server gracefully")
}
close(s.errCh)
close(graceful)
if errored {
logger.Log.Info().Msg("shutdown gracefully but error detected")
os.Exit(1)
}
})
}