/// <summary>
/// Schedules a command for asynchronous and, optionally, deferred delivery.
/// </summary>
/// <typeparam name="TCommand">The type of the command.</typeparam>
/// <param name="command">The command.</param>
/// <param name="due">The time when the command should be delivered. If this is null, the scheduler will deliver it as soon as possible.</param>
/// <exception cref="System.ArgumentNullException">command</exception>
protected async Task ScheduleCommandAsync <TCommand>(TCommand command,
DateTimeOffset?due = null)
where TCommand : class, ICommand <T>
{
if (command == null)
{
throw new ArgumentNullException(nameof(command));
}
var commandScheduledEvent = new CommandScheduled <T>
{
AggregateId = Id,
Command = command,
DueTime = due
};
var scheduledCommand = new ScheduledCommand <T>(
command,
Id,
due,
new EventHasBeenRecordedPrecondition(commandScheduledEvent.ETag, Id));
await Configuration.Current
.CommandScheduler <T>()
.Schedule(scheduledCommand);
RecordEvent(commandScheduledEvent);
}
/// <summary>
/// Schedules a command on the specified scheduler.
/// </summary>
public static async Task <IScheduledCommand <TTarget> > Schedule <TCommand, TTarget>(
this ICommandScheduler <TTarget> scheduler,
string targetId,
TCommand command,
DateTimeOffset?dueTime = null,
IPrecondition deliveryDependsOn = null)
where TCommand : ICommand <TTarget>
{
var scheduledCommand = new ScheduledCommand <TTarget>(
command,
targetId,
dueTime,
deliveryDependsOn);
await scheduler.Schedule(scheduledCommand);
return(scheduledCommand);
}
/// <summary>
/// Schedules a command on the specified scheduler.
/// </summary>
public static async Task <IScheduledCommand <TAggregate> > Schedule <TCommand, TAggregate>(
this ICommandScheduler <TAggregate> scheduler,
Guid aggregateId,
TCommand command,
DateTimeOffset?dueTime = null,
IEvent deliveryDependsOn = null)
where TCommand : ICommand <TAggregate>
{
var scheduledCommand = new ScheduledCommand <TAggregate>(
command,
aggregateId,
dueTime,
deliveryDependsOn.ToPrecondition());
await scheduler.Schedule(scheduledCommand);
return(scheduledCommand);
}