/// <summary> It will start listening to queue messages to keep the local database up to date
/// with the changes in the People. But before it starts that, if the local table
/// is empty, it will fetch the full data. </summary>
public async Task Subscribe()
{
foreach (var item in Subscribers.Values)
{
if (await Database.Of(item.DomainType).None())
{
await item.RefreshData();
}
}
PublishQueue.Subscribe <ReplicateDataMessage>(Import);
}
/// <summary>
/// Attaches an event handler to the specified queue message type.
/// </summary>
public static void Subscribe <TMessage>(this IEventBusQueue queue, Func <TMessage, Task> @handler)
where TMessage : IEventBusMessage
{
queue.Subscribe(message =>
{
if (message.IsEmpty())
{
return(Task.CompletedTask);
}
try
{
var @event = JsonConvert.DeserializeObject <TMessage>(message);
return(handler(@event));
}
catch (Exception ex)
{
throw new Exception("Failed to deserialize event message to " + typeof(TMessage).FullName + ":\r\n" + message, ex);
}
});
}
/// <summary> It will start listening to queue messages to keep the local database up to date
/// with the changes in the People. But before it starts that, if the local table
/// is empty, it will fetch the full data. </summary>
public async Task Subscribe()
{
await EnsureRefreshData();
PublishQueue.Subscribe <ReplicateDataMessage>(Import);
}