Struct cqrs::trivial::NullEventStore

pub struct NullEventStore<A, E>(_)
 where
    A: Aggregate,
    E: AggregateEvent<A>;

A trivial store that never has any events, and which always succeeds in persisting data (which is immediately dropped).

Methods

impl<A, E> NullEventStore<A, E> where
    A: Aggregate,
    E: AggregateEvent<A>, 

pub const DEFAULT: Self

A constant value representing a trivial event store.

Trait Implementations

impl<A: Copy, E: Copy> Copy for NullEventStore<A, E> where
    A: Aggregate,
    E: AggregateEvent<A>, 

impl<A, E> Default for NullEventStore<A, E> where
    A: Aggregate,
    E: AggregateEvent<A>, 

fn default() -> Self

Returns the "default value" for a type.

impl<A: Clone, E: Clone> Clone for NullEventStore<A, E> where
    A: Aggregate,
    E: AggregateEvent<A>, 

fn clone(&self) -> NullEventStore<A, E>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<A, E> Debug for NullEventStore<A, E> where
    A: Aggregate,
    E: AggregateEvent<A>, 

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

Formats the value using the given formatter.

impl<A, E> EventSource<A, E> for NullEventStore<A, E> where
    A: Aggregate,
    E: AggregateEvent<A>, 

type Error = Void

The error type.

type Events = Empty<VersionedEvent<E>>

Represents the sequence of events read from the event source.

fn read_events<I>(
    &self,
    _id: &I,
    _version: Since,
    _max_count: Option<u64>
) -> Result<Option<Self::Events>, Self::Error> where
    I: AggregateId<A>, 

Reads events from the event source for a given identifier.

impl<A, E, M> EventSink<A, E, M> for NullEventStore<A, E> where
    A: Aggregate,
    E: AggregateEvent<A>, 

type Error = Void

The error type.

fn append_events<I>(
    &self,
    _id: &I,
    _events: &[E],
    _expect: Option<Precondition>,
    _metadata: M
) -> Result<EventNumber, Self::Error> where
    I: AggregateId<A>, 

Appends events to a given source, with an optional precondition, and associated metadata.