Struct MigrationHandlerHooks 

pub struct MigrationHandlerHooks {
    pub identity: Option<MigrationIdentityContext>,
    pub post_restore: Option<PostRestoreCallback>,
    pub pre_cleanup: Option<PreCleanupCallback>,
    pub readiness: Option<ReadinessCallback>,
    pub failure: Option<FailureCallback>,
}

Optional cross-cutting hooks consumed by MigrationSubprotocolHandler::with_hooks. Each field is independently opt-in so a test that cares about one hook doesn’t have to fabricate the others; Default = nothing wired.

Field	Side	Purpose
identity	both	auto-seal / auto-open identity envelopes
post_restore	target	kick off channel re-bind replay
pre_cleanup	source	source-side Unsubscribe teardown
readiness	target	gate inbound migrations on runtime state
failure	source	surface structured reason to SDK caller

Fields

identity: Option<MigrationIdentityContext>

Identity-transport context. None = envelopes ignored (pre-identity-envelope fallback).

post_restore: Option<PostRestoreCallback>

Target-side post-restore callback — drives subscription replay.

pre_cleanup: Option<PreCleanupCallback>

Source-side pre-cleanup callback — drives Unsubscribe teardown.

readiness: Option<ReadinessCallback>

Target-side readiness predicate — returns false to reply NotReady instead of attempting restore.

failure: Option<FailureCallback>

Source-side failure observer — surfaces structured reason codes to the SDK.

Trait Implementations

impl Clone for MigrationHandlerHooks

fn clone(&self) -> MigrationHandlerHooks

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Default for MigrationHandlerHooks

fn default() -> MigrationHandlerHooks

Returns the “default value” for a type.