Enum TransitionRole 

pub enum TransitionRole {
    Auto,
    CanonicalDrain,
    QueueStorageTarget,
}

Operator-selected execution role used during a 0.5.x → 0.6 storage transition. Persisted on awa.runtime_instances so the SQL gate for enter_mixed_transition can require a runtime that will actually execute queue-storage work after routing flips, rather than only inspecting the more permissive storage_capability snapshot (auto-role runtimes report queue_storage while in canonical/prepared but downgrade to canonical_drain_only post-flip).

Variants

Auto

Default. Resolves storage at startup from awa.storage_status() and follows whatever the cluster is doing. Auto runtimes started before mixed_transition cannot satisfy the queue-storage executor gate; they’re meant to drain canonical first and then have new auto runtimes spin up post-flip to take over queue_storage work.

CanonicalDrain

Stay on canonical execution regardless of transition state. Used for runtimes that should keep draining canonical even after routing flips.

QueueStorageTarget

Always execute queue-storage work, including pre-flip when state is prepared. At least one live runtime in this role is required before awa.storage_enter_mixed_transition() will succeed.

Implementations

impl TransitionRole

pub fn as_str(self) -> &'static str

Trait Implementations

impl Clone for TransitionRole

fn clone(&self) -> TransitionRole

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for TransitionRole

impl Debug for TransitionRole

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

Formats the value using the given formatter.

impl Default for TransitionRole

fn default() -> TransitionRole

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for TransitionRole

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for TransitionRole

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

Formats the value using the given formatter.

impl Eq for TransitionRole

impl FromStr for TransitionRole

type Err = String

The associated error which can be returned from parsing.

fn from_str(value: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl Hash for TransitionRole

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for TransitionRole

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for TransitionRole

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for TransitionRole