Initial commit

cmd/main.go

@@ -0,0 +1,59 @@
+package main
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"os"
+	"time"
+
+	"github.com/localhots/blt"
+	"github.com/localhots/gobelt/log"
+)
+
+func main() {
+	dsn := flag.String("dsn", "", "Database source name")
+	id := flag.Uint("id", 1000, "Server ID (arbitrary, unique)")
+	file := flag.String("file", "", "Binary log file name")
+	offset := flag.Uint("offset", 0, "Log offset in bytes")
+	flag.Parse()
+
+	ctx := context.Background()
+	validate((*dsn != ""), "Database source name is not set")
+	validate((*id != 0), "Server ID is not set")
+	validate((*file != ""), "Binary log file is not set")
+	conf := blt.Config{
+		ServerID: uint32(*id),
+		File:     *file,
+		Offset:   uint32(*offset),
+	}
+
+	reader, err := blt.Connect(*dsn, conf)
+	if err != nil {
+		log.Fatalf(ctx, "Failed to establish connection: %v", err)
+	}
+
+	off := conf.Offset
+	for i := 0; i < 100; i++ {
+		// for {
+		evt, err := reader.ReadEventHeader(ctx)
+		if err != nil {
+			log.Fatalf(ctx, "Failed to read event: %v", err)
+		}
+		ts := time.Unix(int64(evt.Timestamp), 0).Format(time.RFC3339)
+		log.Info(ctx, "Event received", log.F{
+			"type":      evt.Type,
+			"timestamp": ts,
+			"offset":    off,
+		})
+		off = evt.NextOffset
+	}
+}
+
+func validate(cond bool, msg string) {
+	if !cond {
+		fmt.Println(msg)
+		flag.Usage()
+		os.Exit(2)
+	}
+}