/
tag_dao.go
192 lines (177 loc) · 4.86 KB
/
tag_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 (
"fmt"
"github.com/github/orchestrator/go/db"
"github.com/openark/golib/log"
"github.com/openark/golib/sqlutils"
)
func PutInstanceTag(instanceKey *InstanceKey, tag *Tag) (err error) {
_, err = db.ExecOrchestrator(`
insert
into database_instance_tags (
hostname, port, tag_name, tag_value, last_updated
) VALUES (
?, ?, ?, ?, NOW()
)
on duplicate key update
tag_value=values(tag_value),
last_updated=values(last_updated)
`,
instanceKey.Hostname,
instanceKey.Port,
tag.TagName,
tag.TagValue,
)
return err
}
func Untag(instanceKey *InstanceKey, tag *Tag) (tagged *InstanceKeyMap, err error) {
if tag == nil {
return nil, log.Errorf("Untag: tag is nil")
}
if tag.Negate {
return nil, log.Errorf("Untag: does not support negation")
}
if instanceKey == nil && !tag.HasValue {
return nil, log.Errorf("Untag: either indicate an instance or a tag value. Will not delete on-valued tag across instances")
}
clause := ``
args := sqlutils.Args()
if tag.HasValue {
clause = `tag_name=? and tag_value=?`
args = append(args, tag.TagName, tag.TagValue)
} else {
clause = `tag_name=?`
args = append(args, tag.TagName)
}
if instanceKey != nil {
clause = fmt.Sprintf("%s and hostname=? and port=?", clause)
args = append(args, instanceKey.Hostname, instanceKey.Port)
}
tagged = NewInstanceKeyMap()
query := fmt.Sprintf(`
select
hostname,
port
from
database_instance_tags
where
%s
order by hostname, port
`, clause,
)
err = db.QueryOrchestrator(query, args, func(m sqlutils.RowMap) error {
key, _ := NewResolveInstanceKey(m.GetString("hostname"), m.GetInt("port"))
tagged.AddKey(*key)
return nil
})
query = fmt.Sprintf(`
delete from
database_instance_tags
where
%s
`, clause,
)
if _, err = db.ExecOrchestrator(query, args...); err != nil {
return tagged, log.Errore(err)
}
AuditOperation("delete-instance-tag", instanceKey, tag.String())
return tagged, nil
}
func ReadInstanceTag(instanceKey *InstanceKey, tag *Tag) (tagExists bool, err error) {
query := `
select
tag_value
from
database_instance_tags
where
hostname = ?
and port = ?
and tag_name = ?
`
args := sqlutils.Args(instanceKey.Hostname, instanceKey.Port, tag.TagName)
err = db.QueryOrchestrator(query, args, func(m sqlutils.RowMap) error {
tag.TagValue = m.GetString("tag_value")
tagExists = true
return nil
})
return tagExists, log.Errore(err)
}
func InstanceTagExists(instanceKey *InstanceKey, tag *Tag) (tagExists bool, err error) {
return ReadInstanceTag(instanceKey, &Tag{TagName: tag.TagName})
}
func ReadInstanceTags(instanceKey *InstanceKey) (tags [](*Tag), err error) {
tags = [](*Tag){}
query := `
select
tag_name, tag_value
from
database_instance_tags
where
hostname = ?
and port = ?
order by tag_name
`
args := sqlutils.Args(instanceKey.Hostname, instanceKey.Port)
err = db.QueryOrchestrator(query, args, func(m sqlutils.RowMap) error {
tag := &Tag{
TagName: m.GetString("tag_name"),
TagValue: m.GetString("tag_value"),
}
tags = append(tags, tag)
return nil
})
return tags, log.Errore(err)
}
func GetInstanceKeysByTag(tag *Tag) (tagged *InstanceKeyMap, err error) {
if tag == nil {
return nil, log.Errorf("GetInstanceKeysByTag: tag is nil")
}
clause := ``
args := sqlutils.Args()
if tag.HasValue && !tag.Negate {
// exists and equals
clause = `tag_name=? and tag_value=?`
args = append(args, tag.TagName, tag.TagValue)
} else if !tag.HasValue && !tag.Negate {
// exists
clause = `tag_name=?`
args = append(args, tag.TagName)
} else if tag.HasValue && tag.Negate {
// exists and not equal
clause = `tag_name=? and tag_value!=?`
args = append(args, tag.TagName, tag.TagValue)
} else if !tag.HasValue && tag.Negate {
// does not exist
clause = `1=1 group by hostname, port having sum(tag_name=?)=0`
args = append(args, tag.TagName)
}
tagged = NewInstanceKeyMap()
query := fmt.Sprintf(`
select
hostname,
port
from
database_instance_tags
where
%s
order by hostname, port
`, clause)
err = db.QueryOrchestrator(query, args, func(m sqlutils.RowMap) error {
key, _ := NewResolveInstanceKey(m.GetString("hostname"), m.GetInt("port"))
tagged.AddKey(*key)
return nil
})
return tagged, log.Errore(err)
}