Struct SchemaMigrator 

pub struct SchemaMigrator { /* private fields */ }

Schema migrator for backward compatibility [50].

Enables reading old journal entries by migrating them to current schema version.

Implementations

impl SchemaMigrator

pub fn new(current_version: (u16, u16, u16)) -> Self

Create a new schema migrator.

pub fn register<F>( &mut self, from: (u16, u16, u16), to: (u16, u16, u16), migrate: F, )

where F: Fn(&[u8]) -> SimResult<Vec<u8>> + Send + Sync + 'static,

Register migration between versions.

pub fn needs_migration(&self, entry: &VersionedEntry) -> bool

Check if entry needs migration.

pub fn migrate_to_current(&self, entry: &VersionedEntry) -> SimResult<Vec<u8>>

Migrate entry to current version.

Errors

Returns error if no migration path exists or migration fails.

pub const fn current_version(&self) -> (u16, u16, u16)

Get current version.

pub fn migration_count(&self) -> usize

Get number of registered migrations.

Trait Implementations

impl Debug for SchemaMigrator

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.