Struct DefinitionUpgrade 

pub struct DefinitionUpgrade { /* private fields */ }

One explicit, directed definition compatibility edge.

Implementations

impl DefinitionUpgrade

pub fn new( key: DefinitionUpgradeKey, from: DefinitionIdentity, to: DefinitionIdentity, steps: impl IntoIterator<Item = StepDefinitionUpgrade>, ) -> Result<DefinitionUpgrade, DefinitionError>

Validates a direct, non-transitive compatibility edge.

The M2 edge preserves checkpoint and context bytes unchanged, so applications may use it only when the mapped steps retain the same state schemas and semantics.

Errors

Rejects self-edges, empty mappings, and mappings that reuse a target.

pub const fn key(&self) -> &DefinitionUpgradeKey

Borrows the application-owned upgrade key.

pub const fn from(&self) -> &DefinitionIdentity

Borrows the checkpoint-producing definition.

pub const fn to(&self) -> &DefinitionIdentity

Borrows the proposed definition.

pub fn step_mapping(&self) -> &BTreeMap<StepName, StepName>

Borrows the durable source-to-target step mapping.

Durable adapters replay the mapping when they resolve a compatible restart, so the order is the validated declaration order.

Trait Implementations

impl Clone for DefinitionUpgrade

fn clone(&self) -> DefinitionUpgrade

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DefinitionUpgrade

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

Formats the value using the given formatter.

impl Eq for DefinitionUpgrade

impl PartialEq for DefinitionUpgrade

fn eq(&self, other: &DefinitionUpgrade) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for DefinitionUpgrade