pub enum CreateReason {
Baseline,
GracefulReconfiguration,
HydrationBurst,
OnRefresh(RefreshWindowDecision),
}Expand description
Why a strategy desires a replica slot: the audit attribution a create
decision carries. When several strategies desire the same shape the
winning reason is decided by CreateReason::outranks, since the audit
event carries exactly one reason.
Variants§
Baseline
The implicit baseline: the user’s own cluster config calls for the replica. The environment audits it as a manual create.
GracefulReconfiguration
The graceful-reconfiguration strategy converging an in-flight
background ALTER CLUSTER.
HydrationBurst
The hydration-burst strategy accelerating hydration.
OnRefresh(RefreshWindowDecision)
The on-refresh strategy holding a scheduled cluster on inside a refresh window. Embeds the window decision behind the create, which the environment renders into the audit event’s detail. Embedding it makes “the decision detail appears iff the create audits the schedule reason” structural: when another reason wins the precedence, the decision is discarded with it.
Implementations§
Source§impl CreateReason
impl CreateReason
Sourcepub fn outranks(&self, other: &CreateReason) -> bool
pub fn outranks(&self, other: &CreateReason) -> bool
Whether this reason wins over other when several strategies desire
the same shape, so the create audits this reason.
A pairwise check rather than Ord: an Ord ranking by variant would
have to call two OnRefresh reasons with different window decisions
equal while Eq says they differ, violating the Ord contract.
Trait Implementations§
Source§impl Clone for CreateReason
impl Clone for CreateReason
Source§fn clone(&self) -> CreateReason
fn clone(&self) -> CreateReason
1.0.0 (const: unstable) · Source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source. Read moreSource§impl Debug for CreateReason
impl Debug for CreateReason
Source§impl PartialEq for CreateReason
impl PartialEq for CreateReason
Source§fn eq(&self, other: &CreateReason) -> bool
fn eq(&self, other: &CreateReason) -> bool
self and other values to be equal, and is used by ==.impl Eq for CreateReason
impl StructuralPartialEq for CreateReason
Auto Trait Implementations§
impl Freeze for CreateReason
impl RefUnwindSafe for CreateReason
impl Send for CreateReason
impl Sync for CreateReason
impl Unpin for CreateReason
impl UnsafeUnpin for CreateReason
impl UnwindSafe for CreateReason
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