Enum ObserverState 

#[non_exhaustive]
pub enum ObserverState {
    Passive,
    Active,
    Draining,
}

Observer worker lifecycle (active-passive HA).

• Passive — read-only secondary. Consumes events for warm standby but does not commit writes upstream.
• Active — primary writer. The only projection state permitted to call ProjectionStore mutators.
• Draining — graceful shutdown. Rejects new work, flushes in-flight.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Passive

Not primary; events are observed but writes are blocked.

Active

Primary writer.

Draining

Winding down — rejects new work.

Trait Implementations

impl Clone for ObserverState

fn clone(&self) -> ObserverState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ObserverState

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

Formats the value using the given formatter.

impl PartialEq for ObserverState

fn eq(&self, other: &ObserverState) -> 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 Copy for ObserverState

impl Eq for ObserverState

impl StructuralPartialEq for ObserverState