public async Task <IBusSubscriber> Subscribe <T>(Func <IServiceProvider, T, object, Task> handle) where T : class
{
var entries = await _amazonSQSClient.ReceiveMessageAsync <T>(_conventions.Get <T>().Queue, 1);
var message = entries.FirstOrDefault().Message;
await handle(_serviceProvider, message, null);
return(this);
}
public async Task <IBusConsumer> Consume <T>(Func <IServiceProvider, IEnumerable <T>, Task <IEnumerable <T> > > handle)
where T : IIdentifiable <string>
{
var queue = _conventions.Get <T>().Queue;
int itemsToConsume = _options.ItemsToConsume;
if (itemsToConsume <= 0)
{
throw new Exception("Items to consume is invalid, please configure a valid number.");
}
var entryMessages = new List <MessageEntry <T> >(itemsToConsume);
IEnumerable <MessageEntry <T> > messages;
do
{
messages = await _amazonSQSClient.ReceiveMessageAsync <T>(queue, 10);
entryMessages.AddRange(messages);
} while (entryMessages.Count < itemsToConsume && messages.Any());
var incomingMessages = entryMessages.Select(x => x.Message);
var results = await handle(_serviceProvider, incomingMessages);
var successMessageIds = new HashSet <string>(results.Select(x => x.Id));
IDictionary <string, MessageEntry <T> > entryMessageDictionary = entryMessages.ToDictionary(x => x.UniqueKey);
var succeededMessages = new List <MessageEntry <T> >(successMessageIds.Count());
foreach (var id in successMessageIds)
{
MessageEntry <T> message = entryMessageDictionary[id];
succeededMessages.Add(message);
}
await _amazonSQSClient.DeleteMessagesAsync(succeededMessages, queue);
return(this);
}
