public IAsyncOperation <Exception> Otherwise()
{
lock (this)
{
if (_otherwiseClause == null)
{
_otherwiseClause = new Deferred <Exception>();
if (State == AsyncOperationState.Failed)
{
_otherwiseClause.Accept(Result !.Error !);
}
}
}
return(_otherwiseClause.Operation);
}
/// <summary>
/// Creates a new GRaff.IAsyncOperation that will resolve when all the specified GRaff.IAsyncOperation objects have resolved.
/// </summary>
/// <param name="operations">An array of GRaff.IAsyncOperation objects.</param>
/// <returns>A GRaff.IAsyncOperation that will resolve when all the specified GRaff.IAsyncOperation objects are resolved.</returns>
/// <remarks>
/// If all operations are accepted, the aggregated operation will be accepted. If any of the specified operations are rejected,
/// the aggregated operation will be rejected by an AggregateException, containing an array of System.Exception objects,
///</remarks>
public static IAsyncOperation All(params IAsyncOperation[] operations)
{
if (operations == null || operations.Length == 0)
{
return(Async.Operation());
}
var deferred = new Deferred();
var exceptions = new Exception[operations.Length];
var remainingOperations = operations.Length;
var errorsOccurred = false;
for (int i = 0; i < operations.Length; i++)
{
int index = i;
operations[i].Catch <Exception>(ex => {
exceptions[index] = ex;
errorsOccurred = true;
}).ThenWait(() => {
if (Interlocked.Decrement(ref remainingOperations) == 0)
{
if (errorsOccurred)
{
exceptions = exceptions.Select(ex => ex ?? new Exception(null)).ToArray();
deferred.Reject(new AggregateException(exceptions));
}
else
{
deferred.Accept();
}
}
});
}
return(deferred.Operation);
}