/
master_equivalence_dao.go
130 lines (116 loc) · 4.2 KB
/
master_equivalence_dao.go
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/*
Copyright 2015 Shlomi Noach, courtesy Booking.com
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package inst
import (
"github.com/openark/golib/log"
"github.com/openark/golib/sqlutils"
"github.com/openark/orchestrator/go/config"
"github.com/openark/orchestrator/go/db"
)
func WriteMasterPositionEquivalence(master1Key *InstanceKey, master1BinlogCoordinates *BinlogCoordinates,
master2Key *InstanceKey, master2BinlogCoordinates *BinlogCoordinates) error {
if master1Key.Equals(master2Key) {
// Not interesting
return nil
}
writeFunc := func() error {
_, err := db.ExecOrchestrator(`
insert into master_position_equivalence (
master1_hostname, master1_port, master1_binary_log_file, master1_binary_log_pos,
master2_hostname, master2_port, master2_binary_log_file, master2_binary_log_pos,
last_suggested)
values (?, ?, ?, ?, ?, ?, ?, ?, NOW())
on duplicate key update last_suggested=values(last_suggested)
`, master1Key.Hostname, master1Key.Port, master1BinlogCoordinates.LogFile, master1BinlogCoordinates.LogPos,
master2Key.Hostname, master2Key.Port, master2BinlogCoordinates.LogFile, master2BinlogCoordinates.LogPos,
)
return log.Errore(err)
}
return ExecDBWriteFunc(writeFunc)
}
func GetEquivalentMasterCoordinates(instanceCoordinates *InstanceBinlogCoordinates) (result [](*InstanceBinlogCoordinates), err error) {
query := `
select
master1_hostname as hostname,
master1_port as port,
master1_binary_log_file as binlog_file,
master1_binary_log_pos as binlog_pos
from
master_position_equivalence
where
master2_hostname = ?
and master2_port = ?
and master2_binary_log_file = ?
and master2_binary_log_pos = ?
union
select
master2_hostname as hostname,
master2_port as port,
master2_binary_log_file as binlog_file,
master2_binary_log_pos as binlog_pos
from
master_position_equivalence
where
master1_hostname = ?
and master1_port = ?
and master1_binary_log_file = ?
and master1_binary_log_pos = ?
`
args := sqlutils.Args(
instanceCoordinates.Key.Hostname,
instanceCoordinates.Key.Port,
instanceCoordinates.Coordinates.LogFile,
instanceCoordinates.Coordinates.LogPos,
instanceCoordinates.Key.Hostname,
instanceCoordinates.Key.Port,
instanceCoordinates.Coordinates.LogFile,
instanceCoordinates.Coordinates.LogPos,
)
err = db.QueryOrchestrator(query, args, func(m sqlutils.RowMap) error {
equivalentCoordinates := InstanceBinlogCoordinates{}
equivalentCoordinates.Key.Hostname = m.GetString("hostname")
equivalentCoordinates.Key.Port = m.GetInt("port")
equivalentCoordinates.Coordinates.LogFile = m.GetString("binlog_file")
equivalentCoordinates.Coordinates.LogPos = m.GetInt64("binlog_pos")
result = append(result, &equivalentCoordinates)
return nil
})
if err != nil {
return nil, err
}
return result, nil
}
func GetEquivalentBinlogCoordinatesFor(instanceCoordinates *InstanceBinlogCoordinates, belowKey *InstanceKey) (*BinlogCoordinates, error) {
possibleCoordinates, err := GetEquivalentMasterCoordinates(instanceCoordinates)
if err != nil {
return nil, err
}
for _, instanceCoordinates := range possibleCoordinates {
if instanceCoordinates.Key.Equals(belowKey) {
return &instanceCoordinates.Coordinates, nil
}
}
return nil, nil
}
// ExpireMasterPositionEquivalence expires old master_position_equivalence
func ExpireMasterPositionEquivalence() error {
writeFunc := func() error {
_, err := db.ExecOrchestrator(`
delete from master_position_equivalence
where last_suggested < NOW() - INTERVAL ? HOUR
`, config.Config.UnseenInstanceForgetHours,
)
return log.Errore(err)
}
return ExecDBWriteFunc(writeFunc)
}