98 lines
1.8 KiB
Go
98 lines
1.8 KiB
Go
package database
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import (
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"errors"
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"imposm3/mapping"
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"strings"
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)
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type Config struct {
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Type string
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ConnectionParams string
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Srid int
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}
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type DB interface {
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Begin() error
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End() error
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Abort() error
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Init() error
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Close() error
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RowInserter
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}
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type BulkBeginner interface {
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BeginBulk() error
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}
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type RowInserter interface {
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Insert(string, []interface{})
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}
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type Deployer interface {
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Deploy() error
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RevertDeploy() error
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RemoveBackup() error
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}
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type Generalizer interface {
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Generalize() error
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}
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type Finisher interface {
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Finish() error
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}
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type Deleter interface {
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Delete(string, int64) error
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}
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type Optimizer interface {
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Optimize() error
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}
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var databases map[string]func(Config, *mapping.Mapping) (DB, error)
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func init() {
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databases = make(map[string]func(Config, *mapping.Mapping) (DB, error))
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}
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func Register(name string, f func(Config, *mapping.Mapping) (DB, error)) {
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databases[name] = f
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}
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func Open(conf Config, m *mapping.Mapping) (DB, error) {
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newFunc, ok := databases[conf.Type]
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if !ok {
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return nil, errors.New("unsupported database type: " + conf.Type)
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}
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db, err := newFunc(conf, m)
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if err != nil {
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return nil, err
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}
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return db, nil
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}
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func ConnectionType(param string) string {
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parts := strings.SplitN(param, ":", 2)
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return parts[0]
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}
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type NullDb struct{}
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func (n *NullDb) Init() error { return nil }
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func (n *NullDb) Begin() error { return nil }
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func (n *NullDb) End() error { return nil }
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func (n *NullDb) Close() error { return nil }
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func (n *NullDb) Abort() error { return nil }
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func (n *NullDb) Insert(string, []interface{}) {}
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func NewNullDb(conf Config, m *mapping.Mapping) (DB, error) {
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return &NullDb{}, nil
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}
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func init() {
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Register("null", NewNullDb)
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}
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