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main.go
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main.go
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package main
import (
"flag"
"fmt"
"github.com/bingoohuang/go-mysql/replication"
"os"
"os/signal"
"strings"
"syscall"
"time"
"github.com/bingoohuang/go-mysql/canal"
"github.com/bingoohuang/go-mysql/mysql"
)
var host = flag.String("host", "127.0.0.1", "MySQL host")
var port = flag.Int("port", 3306, "MySQL port")
var user = flag.String("user", "root", "MySQL user, must have replication privilege")
var password = flag.String("password", "root", "MySQL password")
var flavor = flag.String("flavor", "mysql", "Flavor: mysql or mariadb")
var serverID = flag.Int("server-id", 101, "Unique Server ID")
var mysqldump = flag.String("mysqldump", "mysqldump", "mysqldump execution path")
var dbs = flag.String("dbs", "test", "dump Databases, separated by comma")
var tables = flag.String("Tables", "", "dump Tables, separated by comma, will overwrite dbs")
var tableDB = flag.String("table_db", "test", "database for dump Tables")
var ignoreTables = flag.String("ignore_tables", "", "ignore Tables, must be database.table format, separated by comma")
var startName = flag.String("bin_name", "", "start sync from binlog name")
var startPos = flag.Uint("bin_pos", 0, "start sync from binlog position of")
var heartbeatPeriod = flag.Duration("heartbeat", 60*time.Second, "master heartbeat period")
var readTimeout = flag.Duration("read_timeout", 90*time.Second, "connection read timeout")
func main() {
flag.Parse()
cfg := canal.NewDefaultConfig()
cfg.Addr = fmt.Sprintf("%s:%d", *host, *port)
cfg.User = *user
cfg.Password = *password
cfg.Flavor = *flavor
cfg.UseDecimal = true
cfg.ReadTimeout = *readTimeout
cfg.HeartbeatPeriod = *heartbeatPeriod
cfg.ServerID = uint32(*serverID)
cfg.Dump.ExecutionPath = *mysqldump
cfg.Dump.DiscardErr = false
c, err := canal.NewCanal(cfg)
if err != nil {
fmt.Printf("create canal err %v", err)
os.Exit(1)
}
if len(*ignoreTables) > 0 {
subs := strings.Split(*ignoreTables, ",")
for _, sub := range subs {
if seps := strings.Split(sub, "."); len(seps) == 2 {
c.AddDumpIgnoreTables(seps[0], seps[1])
}
}
}
if len(*tables) > 0 && len(*tableDB) > 0 {
subs := strings.Split(*tables, ",")
c.AddDumpTables(*tableDB, subs...)
} else if len(*dbs) > 0 {
subs := strings.Split(*dbs, ",")
c.AddDumpDatabases(subs...)
}
eventHandler := makeHandler()
fmt.Printf("use eventHandler %+v\n", *eventHandler)
c.SetEventHandler(eventHandler)
startPos := mysql.Position{
Name: *startName,
Pos: uint32(*startPos),
}
go func() {
err = c.RunFrom(startPos)
if err != nil {
fmt.Printf("start canal err %v", err)
}
}()
sc := make(chan os.Signal, 1)
signal.Notify(sc,
os.Kill,
os.Interrupt,
syscall.SIGHUP,
syscall.SIGINT,
syscall.SIGTERM,
syscall.SIGQUIT)
<-sc
c.Close()
}
type Handler struct {
Databases map[string]bool
// dump Tables, separated by comma, will overwrite dbs
Tables map[string]bool
TableDB string
IgnoreTables map[string]bool
canal.DummyEventHandler
}
func makeHandler() *Handler {
h := &Handler{}
h.Databases = make(map[string]bool)
h.Tables = make(map[string]bool)
h.IgnoreTables = make(map[string]bool)
if *ignoreTables != "" {
for _, sub := range strings.Split(*ignoreTables, ",") {
if seps := strings.Split(sub, "."); len(seps) == 2 {
h.IgnoreTables[strings.ToUpper(sub)] = true
}
}
}
if *tables != "" && *tableDB != "" {
h.TableDB = *tableDB
for _, sub := range strings.Split(*tables, ",") {
h.Tables[strings.ToUpper(sub)] = true
}
} else if *dbs != "" {
for _, sub := range strings.Split(*dbs, ",") {
h.Databases[strings.ToUpper(sub)] = true
}
}
return h
}
func (h *Handler) OnRotate(e *replication.RotateEvent) error {
fmt.Printf("RotateEvent %s:%d\n", e.NextLogName, e.Position)
return nil
}
func (h *Handler) OnRow(e *canal.RowsEvent) error {
if len(h.IgnoreTables) > 0 {
if _, ok := h.Databases[strings.ToUpper(e.Table.String())]; !ok {
return nil
}
}
if h.TableDB != "" {
if strings.ToUpper(e.Table.Schema) != h.TableDB {
return nil
}
if _, ok := h.Tables[strings.ToUpper(e.Table.Name)]; !ok {
return nil
}
} else if len(h.Databases) > 0 {
if _, ok := h.Databases[strings.ToUpper(e.Table.Schema)]; !ok {
return nil
}
}
fmt.Printf("RowsEvent: %v\n", e)
return nil
}
func (h *Handler) String() string {
return "TestHandler"
}