/
configs.go
122 lines (109 loc) · 3.1 KB
/
configs.go
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package store
import (
"strings"
"github.com/docker/swarmkit/api"
memdb "github.com/hashicorp/go-memdb"
)
const tableConfig = "config"
func init() {
register(ObjectStoreConfig{
Table: &memdb.TableSchema{
Name: tableConfig,
Indexes: map[string]*memdb.IndexSchema{
indexID: {
Name: indexID,
Unique: true,
Indexer: api.ConfigIndexerByID{},
},
indexName: {
Name: indexName,
Unique: true,
Indexer: api.ConfigIndexerByName{},
},
indexCustom: {
Name: indexCustom,
Indexer: api.ConfigCustomIndexer{},
AllowMissing: true,
},
},
},
Save: func(tx ReadTx, snapshot *api.StoreSnapshot) error {
var err error
snapshot.Configs, err = FindConfigs(tx, All)
return err
},
Restore: func(tx Tx, snapshot *api.StoreSnapshot) error {
toStoreObj := make([]api.StoreObject, len(snapshot.Configs))
for i, x := range snapshot.Configs {
toStoreObj[i] = x
}
return RestoreTable(tx, tableConfig, toStoreObj)
},
ApplyStoreAction: func(tx Tx, sa api.StoreAction) error {
switch v := sa.Target.(type) {
case *api.StoreAction_Config:
obj := v.Config
switch sa.Action {
case api.StoreActionKindCreate:
return CreateConfig(tx, obj)
case api.StoreActionKindUpdate:
return UpdateConfig(tx, obj)
case api.StoreActionKindRemove:
return DeleteConfig(tx, obj.ID)
}
}
return errUnknownStoreAction
},
})
}
// CreateConfig adds a new config to the store.
// Returns ErrExist if the ID is already taken.
func CreateConfig(tx Tx, c *api.Config) error {
// Ensure the name is not already in use.
if tx.lookup(tableConfig, indexName, strings.ToLower(c.Spec.Annotations.Name)) != nil {
return ErrNameConflict
}
return tx.create(tableConfig, c)
}
// UpdateConfig updates an existing config in the store.
// Returns ErrNotExist if the config doesn't exist.
func UpdateConfig(tx Tx, c *api.Config) error {
// Ensure the name is either not in use or already used by this same Config.
if existing := tx.lookup(tableConfig, indexName, strings.ToLower(c.Spec.Annotations.Name)); existing != nil {
if existing.GetID() != c.ID {
return ErrNameConflict
}
}
return tx.update(tableConfig, c)
}
// DeleteConfig removes a config from the store.
// Returns ErrNotExist if the config doesn't exist.
func DeleteConfig(tx Tx, id string) error {
return tx.delete(tableConfig, id)
}
// GetConfig looks up a config by ID.
// Returns nil if the config doesn't exist.
func GetConfig(tx ReadTx, id string) *api.Config {
c := tx.get(tableConfig, id)
if c == nil {
return nil
}
return c.(*api.Config)
}
// FindConfigs selects a set of configs and returns them.
func FindConfigs(tx ReadTx, by By) ([]*api.Config, error) {
checkType := func(by By) error {
switch by.(type) {
case byName, byNamePrefix, byIDPrefix, byCustom, byCustomPrefix:
return nil
default:
return ErrInvalidFindBy
}
}
configList := []*api.Config{}
appendResult := func(o api.StoreObject) {
configList = append(configList, o.(*api.Config))
}
err := tx.find(tableConfig, by, checkType, appendResult)
return configList, err
}