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main.go
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main.go
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package main
import (
"context"
"fmt"
"log"
"log/slog"
"os"
"os/signal"
"sync"
"syscall"
"net/http"
_ "net/http/pprof"
"github.com/bluesky-social/indigo/querycheck"
"github.com/bluesky-social/indigo/util/tracing"
"github.com/labstack/echo-contrib/pprof"
"github.com/labstack/echo/v4"
"github.com/labstack/echo/v4/middleware"
"github.com/prometheus/client_golang/prometheus/promhttp"
"go.opentelemetry.io/otel/trace"
"github.com/carlmjohnson/versioninfo"
"github.com/urfave/cli/v2"
)
func main() {
app := cli.App{
Name: "querycheck",
Usage: "a postgresql query plan checker",
Version: versioninfo.Short(),
}
app.Flags = []cli.Flag{
&cli.StringFlag{
Name: "postgres-url",
Usage: "postgres url for storing events",
Value: "postgres://postgres:postgres@localhost:5432/postgres?sslmode=disable",
EnvVars: []string{"POSTGRES_URL"},
},
&cli.IntFlag{
Name: "port",
Usage: "port to serve metrics on",
Value: 8080,
EnvVars: []string{"PORT"},
},
&cli.StringFlag{
Name: "auth-token",
Usage: "auth token for accessing the querycheck api",
Value: "",
EnvVars: []string{"AUTH_TOKEN"},
},
}
app.Action = Querycheck
err := app.Run(os.Args)
if err != nil {
log.Fatal(err)
}
}
var tracer trace.Tracer
// Querycheck is the main function for querycheck
func Querycheck(cctx *cli.Context) error {
ctx := cctx.Context
ctx, cancel := context.WithCancel(ctx)
defer cancel()
// Trap SIGINT to trigger a shutdown.
signals := make(chan os.Signal, 1)
signal.Notify(signals, syscall.SIGINT, syscall.SIGTERM)
logger := slog.New(slog.NewJSONHandler(os.Stdout, &slog.HandlerOptions{
Level: slog.LevelInfo,
}))
defer func() {
logger.Info("main function teardown")
}()
logger = logger.With("source", "querycheck_main")
logger.Info("starting querycheck")
// Registers a tracer Provider globally if the exporter endpoint is set
if os.Getenv("OTEL_EXPORTER_OTLP_ENDPOINT") != "" {
logger.Info("initializing tracer")
shutdown, err := tracing.InstallExportPipeline(ctx, "Querycheck", 1)
if err != nil {
log.Fatal(err)
}
defer func() {
if err := shutdown(ctx); err != nil {
log.Fatal(err)
}
}()
}
wg := sync.WaitGroup{}
// HTTP Server setup and Middleware Plumbing
e := echo.New()
e.HideBanner = true
e.HidePort = true
pprof.Register(e)
e.GET("/metrics", echo.WrapHandler(promhttp.Handler()))
e.Use(middleware.LoggerWithConfig(middleware.DefaultLoggerConfig))
// Start the query checker
querychecker, err := querycheck.NewQuerychecker(ctx, cctx.String("postgres-url"))
if err != nil {
log.Fatalf("failed to create querychecker: %+v\n", err)
}
// getLikeCountQuery := `SELECT *
// FROM like_counts
// WHERE actor_did = 'did:plc:q6gjnaw2blty4crticxkmujt'
// AND ns = 'app.bsky.feed.post'
// AND rkey = '3k3jf5lgbsw24'
// LIMIT 1;`
// querychecker.AddQuery(ctx, "get_like_count", getLikeCountQuery, time.Second*20)
err = querychecker.Start()
if err != nil {
log.Fatalf("failed to start querychecker: %+v\n", err)
}
e.Use(func(next echo.HandlerFunc) echo.HandlerFunc {
return func(c echo.Context) error {
if cctx.String("auth-token") != "" && c.Request().Header.Get("Authorization") != cctx.String("auth-token") {
return c.String(http.StatusUnauthorized, "unauthorized")
}
return next(c)
}
})
e.GET("/query", querychecker.HandleGetQuery)
e.GET("/queries", querychecker.HandleGetQueries)
e.POST("/query", querychecker.HandleAddQuery)
e.PUT("/query", querychecker.HandleUpdateQuery)
e.DELETE("/query", querychecker.HandleDeleteQuery)
// Start the metrics server
wg.Add(1)
go func() {
logger.Info("starting metrics serverd", "port", cctx.Int("port"))
if err := e.Start(fmt.Sprintf(":%d", cctx.Int("port"))); err != nil {
logger.Error("failed to start metrics server", "err", err)
}
wg.Done()
}()
select {
case <-signals:
cancel()
fmt.Println("shutting down on signal")
case <-ctx.Done():
fmt.Println("shutting down on context done")
}
logger.Info("shutting down, waiting for workers to clean up")
if err := e.Shutdown(ctx); err != nil {
logger.Error("failed to shut down metrics server", "err", err)
wg.Done()
}
querychecker.Stop()
wg.Wait()
logger.Info("shut down successfully")
return nil
}