public void PublishToSubscriber(string subscriberName, string topic, string payload, Ack ack = Ack.Master)
{
var collection = _mongoAgent
.GetEnvelops(subscriberName)
.WithWriteConcern(ack.ToWriteConcern());
collection.InsertOne(new Envelope(topic, payload));
}
public async Task <bool> TrySetProcessingStartedAt(string route, string messageId, CancellationToken cancellationToken)
{
var collection = _mongoAgent.GetEnvelops(route);
var filter = Builders <Envelope> .Filter.And(Builders <Envelope> .Filter.Eq(x => x.Id, messageId),
Builders <Envelope> .Filter.Eq(x => x.IsProcessed, false));
var found = await collection.FindOneAndUpdateAsync <Envelope>(filter,
Builders <Envelope> .Update.Set(x => x.ProcessingStartedAt, DateTime.UtcNow).Set(x => x.IsProcessingStarted, true),
cancellationToken : cancellationToken);
return(found != null);
}
public async Task<List<Envelope>> GetUnprocessed(string route, CancellationToken cancellationToken)
{
var threshold = DateTime.UtcNow - _messagingConfiguration.ResendThreshold;
var collection = _mongoAgent.GetEnvelops(route);
var notProcessedFilter = Builders<Envelope>.Filter.And(
Builders<Envelope>.Filter.Lt(x => x.ReadAt, threshold),
Builders<Envelope>.Filter.Eq(x => x.IsRead, true),
Builders<Envelope>.Filter.Eq(x => x.IsProcessed, false)
);
var notProcessed =
await
(await collection.FindAsync(notProcessedFilter, cancellationToken: cancellationToken))
.ToListAsync(
cancellationToken);
return notProcessed;
}
public async Task Listen(string route, CancellationToken cancellationToken)
{
var notReadFilter = Builders <Envelope> .Filter.Eq(x => x.IsRead, false);
var collection = _mongoAgent.GetEnvelops(route);
try
{
while (true)
{
var messages = await(await collection.FindAsync(notReadFilter, null, cancellationToken)).ToListAsync(cancellationToken);
{
foreach (var message in messages)
{
var readMessage = await _messageStatusManager.TrySetReadAt(route, message.Id, cancellationToken);
if (readMessage != null)
{
var resend = readMessage.OriginalId != IdGenerator.Empty;
_messageProcessor.Process(route, readMessage.Id, readMessage.Topic, readMessage.Payload, resend, cancellationToken);
}
}
}
if (!messages.Any())
{
await Task.Delay(100, cancellationToken);
}
}
}
catch (MongoCommandException mongoCommandException)
{
if (mongoCommandException.Code == 96)
{
_messagingLogger.Error(mongoCommandException,
$"{route} reader processes messages slower than they occur");
}
else
{
_messagingLogger.Error(mongoCommandException, $"{route}");
}
}
}
public void PublishToSubscriber(string subscriberName, string topic, string payload)
{
var collection = _mongoAgent.GetEnvelops(subscriberName);
collection.InsertOne(new Envelope(topic, payload));
}
