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index_service.go
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/
index_service.go
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package cmds
import (
"context"
"fmt"
"net"
"net/http"
"os"
"os/signal"
"syscall"
"time"
"github.com/urfave/cli/v2"
"github.com/filecoin-project/filecoin-chain-archiver/build"
"github.com/filecoin-project/filecoin-chain-archiver/pkg/config"
"github.com/filecoin-project/filecoin-chain-archiver/pkg/index/service"
)
var cmdIndexService = &cli.Command{
Name: "index-resolver-service",
Usage: "Commands for the index resolver service",
Description: "The index resolver service provides a way to resolve snapshots",
Flags: []cli.Flag{},
Subcommands: []*cli.Command{
{
Name: "default-config",
Usage: "prints the default configuration",
Description: TrimDescription(``),
Flags: []cli.Flag{},
Action: func(cctx *cli.Context) error {
var icfg interface{}
cfg := config.DefaultIndexServiceConfig()
icfg = cfg
bs, err := config.ConfigComment(icfg)
if err != nil {
return err
}
fmt.Printf("%s", string(bs))
return nil
},
},
{
Name: "run",
Usage: "start the service",
Flags: []cli.Flag{
&cli.StringFlag{
Name: "service-listen",
Usage: "host and port to listen on",
EnvVars: []string{"FCA_INDEX_RESOLVER_SERVICE_LISTEN"},
Value: "localhost:5200",
},
&cli.StringFlag{
Name: "operator-listen",
Usage: "host and port to listen on",
EnvVars: []string{"FCA_INDEX_RESOLVER_OPERATOR_LISTEN"},
Value: "localhost:5201",
},
&cli.StringFlag{
Name: "config-path",
Usage: "path to configuration file",
EnvVars: []string{"FCA_INDEX_RESOLVER_CONFIG_PATH"},
Value: "./config.toml",
},
},
Action: func(cctx *cli.Context) error {
ctx, cancelFunc := context.WithCancel(context.Background())
ctx = context.WithValue(ctx, versionKey{}, build.Version())
signalChan := make(chan os.Signal, 1)
signal.Notify(signalChan, syscall.SIGQUIT, syscall.SIGINT, syscall.SIGHUP, syscall.SIGTERM)
s := service.NewIndexService(ctx)
if err := s.SetupService(cctx.String("config-path")); err != nil {
return err
}
svr := &http.Server{
Addr: cctx.String("service-listen"),
Handler: s.ServiceRouter,
BaseContext: func(listener net.Listener) context.Context {
return context.Background()
},
}
go func() {
logger.Debugw("service running")
err := svr.ListenAndServe()
switch err {
case nil:
case http.ErrServerClosed:
logger.Infow("server closed")
case context.Canceled:
logger.Infow("context cancled")
default:
logger.Errorw("error shutting down service server", "err", err)
}
}()
if err := s.SetupOperator(); err != nil {
return err
}
osvr := http.Server{
Addr: cctx.String("operator-listen"),
Handler: s.OperatorRouter,
BaseContext: func(listener net.Listener) context.Context {
return context.Background()
},
}
go func() {
logger.Debugw("operator running")
err := osvr.ListenAndServe()
switch err {
case nil:
case http.ErrServerClosed:
logger.Infow("server closed")
case context.Canceled:
logger.Infow("context cancled")
default:
logger.Errorw("error shutting down internal server", "err", err)
}
}()
logger.Infow("waiting for signal")
<-signalChan
s.Shutdown()
t := time.NewTimer(svrShutdownTimeout)
shutdownChan := make(chan error)
go func() {
shutdownChan <- svr.Shutdown(ctx)
}()
select {
case err := <-shutdownChan:
if err != nil {
logger.Errorw("shutdown finished with an error", "err", err)
} else {
logger.Infow("shutdown finished successfully")
}
case <-t.C:
logger.Warnw("shutdown timed out")
}
cancelFunc()
time.Sleep(ctxCancelWait)
logger.Infow("closing down database connections")
s.Close()
if err := osvr.Shutdown(ctx); err != nil {
switch err {
case nil:
case http.ErrServerClosed:
logger.Infow("server closed")
case context.Canceled:
logger.Infow("context cancled")
default:
logger.Errorw("error shutting down operator server", "err", err)
}
}
logger.Infow("existing")
return nil
},
},
},
}