Struct MaterializedView

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pub struct MaterializedView<S, E, Repository, View, Error>
where Repository: ViewStateRepository<E, S, Error>, View: ViewStateComputation<E, S>,
{ /* private fields */ }
Expand description

Materialized View.

It is using a View / ViewStateComputation to compute new state based on the current state and the event. It is using a ViewStateRepository to fetch the current state and to save the new state.

Generic parameters:

  • S - State
  • E - Event
  • Repository - View State repository
  • View - View
  • Error - Error

Implementations§

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impl<S, E, Repository, View, Error> MaterializedView<S, E, Repository, View, Error>
where Repository: ViewStateRepository<E, S, Error> + Sync, View: ViewStateComputation<E, S> + Sync, E: Sync, S: Sync, Error: Sync,

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pub fn new(repository: Repository, view: View) -> Self

Creates a new instance of MaterializedView.

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pub async fn handle(&self, event: &E) -> Result<S, Error>

Handles the event by fetching the state from the repository, computing new state based on the current state and the event, and saving the new state to the repository.

Trait Implementations§

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impl<S, E, Repository, View, Error> ViewStateComputation<E, S> for MaterializedView<S, E, Repository, View, Error>
where Repository: ViewStateRepository<E, S, Error>, View: ViewStateComputation<E, S>,

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fn compute_new_state(&self, current_state: Option<S>, events: &[&E]) -> S

Computes new state based on the current state and the events.

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impl<S, E, Repository, View, Error> ViewStateRepository<E, S, Error> for MaterializedView<S, E, Repository, View, Error>
where Repository: ViewStateRepository<E, S, Error> + Sync, View: ViewStateComputation<E, S> + Sync, E: Sync, S: Sync, Error: Sync,

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async fn fetch_state(&self, event: &E) -> Result<Option<S>, Error>

Fetches current state, based on the event.

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async fn save(&self, state: &S) -> Result<S, Error>

Saves the new state.

Auto Trait Implementations§

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impl<S, E, Repository, View, Error> Freeze for MaterializedView<S, E, Repository, View, Error>
where Repository: Freeze, View: Freeze,

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impl<S, E, Repository, View, Error> RefUnwindSafe for MaterializedView<S, E, Repository, View, Error>
where Repository: RefUnwindSafe, View: RefUnwindSafe, S: RefUnwindSafe, E: RefUnwindSafe, Error: RefUnwindSafe,

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impl<S, E, Repository, View, Error> Send for MaterializedView<S, E, Repository, View, Error>
where Repository: Send, View: Send, S: Send, E: Send, Error: Send,

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impl<S, E, Repository, View, Error> Sync for MaterializedView<S, E, Repository, View, Error>
where Repository: Sync, View: Sync, S: Sync, E: Sync, Error: Sync,

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impl<S, E, Repository, View, Error> Unpin for MaterializedView<S, E, Repository, View, Error>
where Repository: Unpin, View: Unpin, S: Unpin, E: Unpin, Error: Unpin,

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impl<S, E, Repository, View, Error> UnwindSafe for MaterializedView<S, E, Repository, View, Error>
where Repository: UnwindSafe, View: UnwindSafe, S: UnwindSafe, E: UnwindSafe, Error: UnwindSafe,

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