public async Task ConnectToBrokerAsync(string nelloTopicId)
{
try
{
_nelloTopicId = nelloTopicId;
var options = new MqttClientOptionsBuilder()
.WithTcpServer(SERVER_ADDRESS, SERVER_PORT)
.Build();
_client.UseDisconnectedHandler(async e =>
{
try
{
await _client.ReconnectAsync();
}
catch (Exception ex)
{
_logger.LogError("UseDisconnectedHandler error:\n" + ex.ToString());
}
});
_client.UseConnectedHandler(async e =>
{
try
{
foreach (var topic in _mqttListeningTopics)
{
await SubscribeToTopicAsync(string.Format("{0}{1}/{2}", TOPIC_PREFIX, _nelloTopicId, topic));
}
}
catch (Exception ex)
{
_logger.LogError("UseDisconnectedHandler error:\n" + ex.ToString());
}
});
_client.UseApplicationMessageReceivedHandler(e =>
{
try
{
if (e.ApplicationMessage.Topic.StartsWith("/nello_one"))
{
var args = new MqttMessageEventArgs();
args.ClientId = e.ClientId;
args.Message = Encoding.UTF8.GetString(e.ApplicationMessage.Payload);
args.Topic = e.ApplicationMessage.Topic;
MqttMessageReceived?.Invoke(this, args);
}
}
catch (Exception ex)
{
_logger.LogError("UseDisconnectedHandler error:\n" + ex.ToString());
}
});
await _client.ConnectAsync(options);
}
catch (Exception ex)
{
_logger.LogError("ConnectToBrokerAsync error:\n" + ex.ToString());
}
}
public Task ReconnectAsync() => client.ReconnectAsync();