New a basic manager.

PolicyMigratorFactory is a factory func to create PolicyMigrator.

VersionKey returns the key of redis schema.

SchemaVersion identifies the schema version of RDB.

BasicManager is the default implementation of manager interface.

MigratorChainNode is a wrapper to append the migrator to the chain with a next reference.

MigratorMeta keeps the base info of the migrator.

PolicyMigrator migrate the cron job policy to new schema.

Manager for managing the related migrators.

RDBMigrator defines the action to migrate redis data.

MigratorFactory is factory function to create RDBMigrator interface.