Enum evident::subscription::SubscriptionError

pub enum SubscriptionError<K: Id> {
    AllEventsSubscriptionNotModifiable,
    IdNotSubscribed(K),
    IdAlreadySubscribed(K),
    UnsubscribeWouldDeleteSubscription,
    CouldNotAccessPublisher,
    NoSubscriptionChannelAvailable,
}

Possible errors for (un)subscribe functions.

Variants

AllEventsSubscriptionNotModifiable

This Subscription was created to listen to all events, which cannot be modified afterwards.

IdNotSubscribed(K)

Event-ID is not subscribed. Therefore, the ID cannot be unsubscribed.

The problematic ID may be accessed at tuple position 0.

IdAlreadySubscribed(K)

Event-ID is already subscribed. Therefore, the ID cannot be re-subscribed.

The problematic ID may be accessed at tuple position 0.

UnsubscribeWouldDeleteSubscription

Unsubscribing would remove all subscriptions to specific event-IDs. This would remove all conntections between the Subscription and the EvidentPublisher, making it impossible to modify the subscription at a later point.

CouldNotAccessPublisher

Could not lock access to the EvidentPublisher.

NoSubscriptionChannelAvailable

No sender-part of the subscription-channel between this Subscription and the EvidentPublisher is available in the EvidentPublisher.

Trait Implementations

impl<K: Clone + Id> Clone for SubscriptionError<K>

fn clone(&self) -> SubscriptionError<K>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<K: Debug + Id> Debug for SubscriptionError<K>

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

Formats the value using the given formatter.