version

package

v1.1.4 Latest Latest Go to latest Published: Sep 24, 2023 License: AGPL-3.0 Imports: 4 Imported by: 0

Details

Valid go.mod file

The Go module system was introduced in Go 1.11 and is the official dependency management solution for Go.
Redistributable license

Redistributable licenses place minimal restrictions on how software can be used, modified, and redistributed.
Tagged version

Modules with tagged versions give importers more predictable builds.
Stable version

When a project reaches major version v1 it is considered stable.
Learn more about best practices

This section is empty.

View Source

var ErrUnknownVersion = errors.New("version is unknown")

func DoMigration(name string, m MigrationMap) error

func GetCurrentVersion(name string) int64

func SetVersion(name string, version int64) (oldVersion int64, err error)

type Migration interface {
	Func() MigrationFunc
	TargetVersion() int64
}

func CreateSimpleMigration(targetVersion int64, f MigrationFunc) Migration

CreateSimpleMigration 可以用来快速创建一个 Migration 的helper 如果逻辑较为复杂，需要其他更多信息，也可以自行实现 Migration

type MigrationFunc func() error

MigrationFunc 定义了迁移函数，实现的时候只能在当前goroutine内操作，不可创建其他goroutine，执行时会在RW事务中

func ChainMigration(fn ...MigrationFunc) MigrationFunc

ChainMigration 将多个 MigrationFunc 组合成一个 MigrationFunc ，每个 MigrationFunc 会按顺序执行

func CopyKeyValueByPattern(patternFunc localdb.KeyPatternFunc,
	operator func(key, value string) (string, string)) MigrationFunc

CopyKeyValueByPattern 遍历一个KeyPattern，对每个key/value执行operator，并把operator的返回值作为新的key/value，保留TTL 如果key变化了，不会删除老的key

func MigrationKeyValueByPattern(patternFunc localdb.KeyPatternFunc,
	operator func(key, value string) (string, string)) MigrationFunc

MigrationKeyValueByPattern 遍历一个KeyPattern，对每个key/value执行operator，并把operator的返回值作为新的key/value，保留TTL 如果key变化了，会删除老的key

func MigrationValueByPattern(patternFunc localdb.KeyPatternFunc,
	operator func(key, value string) string) MigrationFunc

MigrationValueByPattern 遍历一个KeyPattern，对每个key/value执行operator，并把operator的返回值作为新的value，保留TTL

type MigrationMap interface {
	From(v int64) Migration
}

func NewMigrationMapFromMap(m map[int64]Migration) MigrationMap