Class DbEventStoreRepository<TDomainEntity, TKey, TEventStoreEntity, TEventEntity>

The base class for the event store repositories that persist the events into a database.

Inheritance
System.Object
EventStoreRepository<TDomainEntity, TEventStoreEntity, TEventEntity>
DbEventStoreRepository<TDomainEntity, TKey, TEventStoreEntity, TEventEntity>
Inherited Members
System.Object.Equals(System.Object)
System.Object.Equals(System.Object, System.Object)
System.Object.GetHashCode()
System.Object.GetType()
System.Object.MemberwiseClone()
System.Object.ReferenceEquals(System.Object, System.Object)
System.Object.ToString()
Namespace: Silverback.EventStore
Assembly: Silverback.EventSourcing.dll
Syntax
public abstract class DbEventStoreRepository<TDomainEntity, TKey, TEventStoreEntity, TEventEntity> : EventStoreRepository<TDomainEntity, TEventStoreEntity, TEventEntity> where TDomainEntity : class, IEventSourcingDomainEntity<TKey> where TEventStoreEntity : EventStoreEntity<TEventEntity>, new()

    where TEventEntity : class, IEventEntity, new()
Type Parameters
Name Description
TDomainEntity

The type of the domain entity whose events are stored in this repository.
TKey

The type of the domain entity key.
TEventStoreEntity

The type of event store entity being persisted to the underlying storage.
TEventEntity

The base type of the events that will be associated to the event store entity.

Constructors

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DbEventStoreRepository(IDbContext)

Initializes a new instance of the DbEventStoreRepository<TDomainEntity, TKey, TEventStoreEntity, TEventEntity> class.

Declaration
protected DbEventStoreRepository(IDbContext dbContext)
Parameters
Type Name Description
IDbContext dbContext

The IDbContext to use as storage.

Properties

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EventStores

Gets the System.Linq.IQueryable<T> of event store entities.

Declaration
protected IQueryable<TEventStoreEntity> EventStores { get; }
Property Value
Type Description
System.Linq.IQueryable<TEventStoreEntity>
Remarks

This System.Linq.IQueryable<T> is pre-configured to include the events and is meant for read only (changes are not being tracked).

Methods

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AddEventStoreEntity(TEventStoreEntity)

Declaration
protected override void AddEventStoreEntity(TEventStoreEntity eventStoreEntity)
Parameters
Type Name Description
TEventStoreEntity eventStoreEntity
Overrides
Silverback.EventStore.EventStoreRepository<TDomainEntity, TEventStoreEntity, TEventEntity>.AddEventStoreEntity(TEventStoreEntity)
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Find(Expression<Func<TEventStoreEntity, Boolean>>, Nullable<DateTime>)

Finds the event store matching the specified predicate and if found returns the domain entity after having applied the stored events.

Declaration
public TDomainEntity Find(Expression<Func<TEventStoreEntity, bool>> predicate, DateTime? snapshot = null)
Parameters
Type Name Description
System.Linq.Expressions.Expression<System.Func<TEventStoreEntity, System.Boolean>> predicate

The predicate applied to get the desired event store.
System.Nullable<System.DateTime> snapshot

The optional snapshot datetime. When not null only the events registered until the specified datetime are applied, returning the entity in its state back in that moment.
Returns
Type Description
TDomainEntity

The domain entity or null if not found.
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FindAsync(Expression<Func<TEventStoreEntity, Boolean>>, Nullable<DateTime>)

Finds the event store matching the specified predicate and if found returns the domain entity after having applied the stored events.

Declaration
public async Task<TDomainEntity> FindAsync(Expression<Func<TEventStoreEntity, bool>> predicate, DateTime? snapshot = null)
Parameters
Type Name Description
System.Linq.Expressions.Expression<System.Func<TEventStoreEntity, System.Boolean>> predicate

The predicate applied to get the desired event store.
System.Nullable<System.DateTime> snapshot

The optional snapshot datetime. When not null only the events registered until the specified datetime are applied, returning the entity in its state back in that moment.
Returns
Type Description
System.Threading.Tasks.Task<TDomainEntity>

A System.Threading.Tasks.Task<TResult> representing the asynchronous operation. The task result contains the domain entity or null if not found.
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GetEventStoreEntity(TDomainEntity)

Declaration
protected override TEventStoreEntity GetEventStoreEntity(TDomainEntity domainEntity)
Parameters
Type Name Description
TDomainEntity domainEntity
Returns
Type Description
TEventStoreEntity
Overrides
Silverback.EventStore.EventStoreRepository<TDomainEntity, TEventStoreEntity, TEventEntity>.GetEventStoreEntity(TDomainEntity)
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GetEventStoreEntityAsync(TDomainEntity)

Declaration
protected override async Task<TEventStoreEntity> GetEventStoreEntityAsync(TDomainEntity domainEntity)
Parameters
Type Name Description
TDomainEntity domainEntity
Returns
Type Description
System.Threading.Tasks.Task<TEventStoreEntity>
Overrides
Silverback.EventStore.EventStoreRepository<TDomainEntity, TEventStoreEntity, TEventEntity>.GetEventStoreEntityAsync(TDomainEntity)
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RemoveCore(TEventStoreEntity)

Declaration
protected override void RemoveCore(TEventStoreEntity eventStore)
Parameters
Type Name Description
TEventStoreEntity eventStore
Overrides
Silverback.EventStore.EventStoreRepository<TDomainEntity, TEventStoreEntity, TEventEntity>.RemoveCore(TEventStoreEntity)