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dump.go
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dump.go
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package canal
import (
"strconv"
"time"
"github.com/juju/errors"
"github.com/siddontang/go-mysql/dump"
"github.com/siddontang/go-mysql/mysql"
"github.com/siddontang/go-mysql/schema"
log "github.com/sirupsen/logrus"
)
type dumpParseHandler struct {
c *Canal
name string
pos uint64
}
func (h *dumpParseHandler) BinLog(name string, pos uint64) error {
h.name = name
h.pos = pos
return nil
}
func (h *dumpParseHandler) Data(db string, table string, values []string) error {
if err := h.c.ctx.Err(); err != nil {
return err
}
tableInfo, err := h.c.GetTable(db, table)
if err != nil {
e := errors.Cause(err)
if e == ErrExcludedTable ||
e == schema.ErrTableNotExist ||
e == schema.ErrMissingTableMeta {
return nil
}
log.Errorf("get %s.%s information err: %v", db, table, err)
return errors.Trace(err)
}
vs := make([]interface{}, len(values))
for i, v := range values {
if v == "NULL" {
vs[i] = nil
} else if v[0] != '\'' {
if tableInfo.Columns[i].Type == schema.TYPE_NUMBER {
n, err := strconv.ParseInt(v, 10, 64)
if err != nil {
log.Errorf("parse row %v at %d error %v, skip", values, i, err)
return dump.ErrSkip
}
vs[i] = n
} else if tableInfo.Columns[i].Type == schema.TYPE_FLOAT {
f, err := strconv.ParseFloat(v, 64)
if err != nil {
log.Errorf("parse row %v at %d error %v, skip", values, i, err)
return dump.ErrSkip
}
vs[i] = f
} else {
log.Errorf("parse row %v error, invalid type at %d, skip", values, i)
return dump.ErrSkip
}
} else {
vs[i] = v[1 : len(v)-1]
}
}
events := newRowsEvent(tableInfo, InsertAction, [][]interface{}{vs})
return h.c.eventHandler.OnRow(events)
}
func (c *Canal) AddDumpDatabases(dbs ...string) {
if c.dumper == nil {
return
}
c.dumper.AddDatabases(dbs...)
}
func (c *Canal) AddDumpTables(db string, tables ...string) {
if c.dumper == nil {
return
}
c.dumper.AddTables(db, tables...)
}
func (c *Canal) AddDumpIgnoreTables(db string, tables ...string) {
if c.dumper == nil {
return
}
c.dumper.AddIgnoreTables(db, tables...)
}
func (c *Canal) tryDump() error {
pos := c.master.Position()
gtid := c.master.GTID()
if (len(pos.Name) > 0 && pos.Pos > 0) || gtid != nil {
// we will sync with binlog name and position
log.Infof("skip dump, use last binlog replication pos %s or GTID %s", pos, gtid)
return nil
}
if c.dumper == nil {
log.Info("skip dump, no mysqldump")
return nil
}
h := &dumpParseHandler{c: c}
if c.cfg.Dump.SkipMasterData {
pos, err := c.GetMasterPos()
if err != nil {
return errors.Trace(err)
}
log.Infof("skip master data, get current binlog position %v", pos)
h.name = pos.Name
h.pos = uint64(pos.Pos)
}
start := time.Now()
log.Info("try dump MySQL and parse")
if err := c.dumper.DumpAndParse(h); err != nil {
return errors.Trace(err)
}
log.Infof("dump MySQL and parse OK, use %0.2f seconds, start binlog replication at (%s, %d)",
time.Now().Sub(start).Seconds(), h.name, h.pos)
pos = mysql.Position{h.name, uint32(h.pos)}
c.master.Update(pos)
c.eventHandler.OnPosSynced(pos, true)
return nil
}