/// <summary>
/// Adds a number of entities to the system.
/// </summary>
/// <param name="entities">The entities to add.</param>
/// <param name="db">The unit of work to operate against.</param>
public virtual void Add(IEnumerable <TEntity> entities, IUnitOfWorkLinq <TEntity, TKey> db)
{
Guard.ArgumentNotNull(entities, nameof(entities));
Guard.ArgumentNotNull(db, nameof(db));
//avoid multiple enumerations
var entitiesAsArray = entities.ToArray();
entitiesAsArray.Each(OnBeforeAdd);
DemandValid(entitiesAsArray);
// try assign domain id
entitiesAsArray.Each(entity =>
{
if (entity.Id.Equals(default(TKey)))
{
_idProvider.Provide(entity); //assign next key
}
});
Db.EntitySet.Writer.Insert(entitiesAsArray);
// send domain events
entitiesAsArray.Each(entity =>
{
MessagePipe.SendAsync(new ItemAdded <TEntity>(entity));
// notify item add
OnAfterItemAdded(entity);
}
);
}
/// <summary>
/// Deletes an entity by its key.
/// </summary>
/// <param name="key">The id of the entity to delete.</param>
/// <param name="db">The unit of work instance to work against.</param>
public virtual void RemoveById(TKey key, IUnitOfWorkLinq <TEntity, TKey> db)
{
Guard.ArgumentNotNull(db, nameof(db));
// assume db session is open
OnBeforeDelete(key);
db.EntitySet.Writer.DeleteById(key);
OnBeforeDeleteCommit(db, key);
MessagePipe.SendAsync(new ItemDeleted <TEntity, TKey>(key));
}
/// <summary>
/// Updates a given entity against a given unit of work.
/// </summary>
/// <remarks>
/// Caller must control commits to the given unit of work.
/// </remarks>
/// <param name="entity">The entity to update.</param>
/// <param name="db">The unit of work instance to work against.</param>
public virtual void Update(TEntity entity, IUnitOfWorkLinq <TEntity, TKey> db)
{
Guard.ArgumentNotNull(entity, nameof(entity));
Guard.ArgumentNotNull(db, nameof(db));
//validate business logic
DemandValid(entity);
OnBeforeUpdate(entity);
db.EntitySet.Writer.Update(entity);
MessagePipe
.SendAsync(new ItemUpdated <TEntity>(entity));
}
protected virtual void OnAfterItemUpdated(TEntity entity)
{
// todo
MessagePipe.SendAsync(new ItemUpdated <TEntity>(entity));
}