private object GetHandler <TResult>(IQuerySpec <TResult> querySpec)
{
if (_dict.ContainsKey(querySpec.GetType()))
{
return(_dict[querySpec.GetType()]);
}
var handlerType = typeof(IQueryHandler <,>).MakeGenericType(querySpec.GetType(), typeof(TResult));
var handler = _serviceProvider.GetRequiredService(handlerType);
_dict.Add(querySpec.GetType(), handler);
return(handler);
}
public async Task <TResult> ExecuteQuery <TResult>(IQuerySpec <TResult> querySpec)
{
var handler = GetHandler(querySpec);
try
{
_logger.LogInformation($"Handling query {querySpec.GetType()}");
var result = await(Task <TResult>)((dynamic)handler).Handle((dynamic)querySpec);
return(result);
}
catch (Exception e)
{
_logger.LogError(e,
$"Query exception occured during handling of {querySpec.GetType()} query in {handler.GetType()}");
throw; //TODO: Decide if throwing is required
}
}
public Task <List <BudgetItemType> > GetListAsync(IQuerySpec <BudgetItemType> querySpec, CancellationToken cancellationToken)
{
throw new NotImplementedException();
}
public Task <List <BudgetItemType> > GetListAsync(IQuerySpec <BudgetItemType> querySpec)
{
throw new NotImplementedException();
}
public virtual Task <List <TEntity> > GetListAsync(IQuerySpec <TEntity> querySpec, CancellationToken cancellationToken = default(CancellationToken))
{
throw new NotImplementedException();
}
public static Task <List <TEntity> > GetListAsync <TEntity>(
this IEntityQuery <TEntity> repo,
IQuerySpec <TEntity> querySpec) where TEntity : class
{
return(repo.GetListAsync(querySpec, default(CancellationToken)));
}
/// <summary>
/// Returns a query expression that, when enumerated, will retrieve only the objects that satisfy the where condition.
/// </summary>
public virtual Task <List <TEntity> > GetListAsync(IQuerySpec <TEntity> querySpec, CancellationToken cancellationToken)
{
return(QueryInternal(querySpec?.WhereExpression).ToListAsync(cancellationToken));
}
