public PreconditionNotMetException(ScheduledCommandPrecondition precondition)
: base("Precondition was not met: " + precondition)
{
if (precondition == null)
{
throw new ArgumentNullException("precondition");
}
Precondition = precondition;
}
public PreconditionNotMetException(ScheduledCommandPrecondition precondition)
: base("Precondition was not met: " + precondition)
{
if (precondition == null)
{
throw new ArgumentNullException("precondition");
}
Precondition = precondition;
}
internal static IScheduledCommand <TAggregate> CreateScheduledCommand <TCommand, TAggregate>(
Guid aggregateId,
TCommand command,
DateTimeOffset?dueTime,
IEvent deliveryDependsOn = null)
where TCommand : ICommand <TAggregate> where TAggregate : IEventSourced
{
ScheduledCommandPrecondition precondition = null;
if (deliveryDependsOn != null)
{
if (deliveryDependsOn.AggregateId == Guid.Empty)
{
throw new ArgumentException("An AggregateId must be set on the event on which the scheduled command depends.");
}
if (String.IsNullOrWhiteSpace(deliveryDependsOn.ETag))
{
deliveryDependsOn.IfTypeIs <Event>()
.ThenDo(e => e.ETag = Guid.NewGuid().ToString("N"))
.ElseDo(() => { throw new ArgumentException("An ETag must be set on the event on which the scheduled command depends."); });
}
precondition = new ScheduledCommandPrecondition
{
AggregateId = deliveryDependsOn.AggregateId,
ETag = deliveryDependsOn.ETag
};
}
if (String.IsNullOrEmpty(command.ETag))
{
command.IfTypeIs <Command>()
.ThenDo(c => c.ETag = CommandContext.Current
.IfNotNull()
.Then(ctx => ctx.NextETag(aggregateId.ToString("N")))
.Else(() => Guid.NewGuid().ToString("N")));
}
var scheduledCommand = new CommandScheduled <TAggregate>
{
Command = command,
DueTime = dueTime,
AggregateId = aggregateId,
SequenceNumber = -DateTimeOffset.UtcNow.Ticks,
DeliveryPrecondition = precondition
};
return(scheduledCommand);
}
public static Task Schedule <TCommand, TAggregate>(
this ICommandScheduler <TAggregate> scheduler,
Guid aggregateId,
TCommand command,
DateTimeOffset?dueTime = null,
IEvent deliveryDependsOn = null)
where TCommand : ICommand <TAggregate>
where TAggregate : IEventSourced
{
if (aggregateId == Guid.Empty)
{
throw new ArgumentException("Parameter aggregateId cannot be an empty Guid.");
}
ScheduledCommandPrecondition precondition = null;
if (deliveryDependsOn != null)
{
if (deliveryDependsOn.AggregateId == Guid.Empty)
{
throw new ArgumentException("An AggregateId must be set on the event on which the scheduled command depends.");
}
if (string.IsNullOrWhiteSpace(deliveryDependsOn.ETag))
{
deliveryDependsOn.IfTypeIs <Event>()
.ThenDo(e => e.ETag = Guid.NewGuid().ToString("N"))
.ElseDo(() => { throw new ArgumentException("An ETag must be set on the event on which the scheduled command depends."); });
}
precondition = new ScheduledCommandPrecondition
{
AggregateId = deliveryDependsOn.AggregateId,
ETag = deliveryDependsOn.ETag
};
}
return(scheduler.Schedule(new CommandScheduled <TAggregate>
{
Command = command,
DueTime = dueTime,
AggregateId = aggregateId,
SequenceNumber = -DateTimeOffset.UtcNow.Ticks,
DeliveryPrecondition = precondition
}));
}
