/
server.go
102 lines (92 loc) · 2.54 KB
/
server.go
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package grpc
import (
"context"
"fmt"
"github.com/Masterminds/log-go"
grpc_prometheus "github.com/grpc-ecosystem/go-grpc-prometheus"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/collectors"
"github.com/prometheus/client_golang/prometheus/promhttp"
tfx "github.com/qianwj/typed/fx"
"go.uber.org/atomic"
"go.uber.org/fx"
"go.uber.org/zap"
"google.golang.org/grpc"
"net"
"net/http"
"os"
)
type Server struct {
opts *grpcOptions
srv *grpc.Server
ctx *applicationContext
}
type applicationContext struct {
services []fx.Option
dataSources *tfx.DataSources
state *atomic.Int32
}
func (ctx *applicationContext) provide() fx.Option {
return fx.Options(
fx.Options(ctx.services...),
)
}
func NewServer(options ...Option) tfx.Server {
opts := new(grpcOptions)
for _, option := range options {
option(opts)
}
return &Server{opts: opts, ctx: &applicationContext{}}
}
func (app *Server) Provide() fx.Option {
return fx.Options(app.ctx.provide(), fx.Supply(app), fx.Invoke(runGrpcServer))
}
func (app *Server) onStart(ctx context.Context) error {
err := app.ctx.dataSources.Connect(ctx)
if err != nil {
return err
}
lis, err := net.Listen("tcp", app.opts.addr)
if err != nil {
return err
}
go func(ctx context.Context) {
if err := app.srv.Serve(lis); err != nil {
log.Error("starting grpc server error:", err)
os.Exit(-1)
}
}(ctx)
return nil
}
func (app *Server) onStop(ctx context.Context) error {
app.srv.GracefulStop()
err := app.ctx.dataSources.Close(ctx)
return err
}
func runGrpcServer(app *Server, dataSources tfx.DataSources, serviceModule serviceModule, lifecycle fx.Lifecycle) *grpc.Server {
srv := grpc.NewServer(grpcServerOptions(app.opts)...)
serviceModule.register(srv)
app.srv = srv
app.ctx.dataSources = &dataSources
if app.opts.metrics != nil {
exportMetrics(app.opts.metrics.port, srv)
}
lifecycle.Append(fx.Hook{
OnStart: app.onStart,
OnStop: app.onStop,
})
return srv
}
func exportMetrics(port int, srv *grpc.Server) {
registry := prometheus.NewRegistry()
registry.MustRegister(collectors.NewProcessCollector(collectors.ProcessCollectorOpts{}))
registry.MustRegister(collectors.NewGoCollector())
registry.MustRegister(grpc_prometheus.DefaultServerMetrics)
grpc_prometheus.Register(srv)
server := &http.Server{Handler: promhttp.HandlerFor(registry, promhttp.HandlerOpts{}), Addr: fmt.Sprintf(":%d", port)}
go func() {
if err := server.ListenAndServe(); err != nil {
zap.L().Error("exporter start error: ", zap.Error(err))
}
}()
}