public async Task<string[]> GetFieldsByMachines(IList<string> machines)
{
if (machines.Count > 0)
{
var machinesJson = JsonConvert.SerializeObject(machines);
Utils.Query q = new Utils.Query { Type = "GetFieldsByMachines", Field = machinesJson };
var message = new AMQPMessage { Type = AMQPMessageType.Query, Data = JsonConvert.SerializeObject(q), Sender = "management" };
await _amqpconn.SendMessageAsync("direct_message", "database", JsonConvert.SerializeObject(message));
//ricezione query result
string result = await taskCompletionSource.Task;
if (String.IsNullOrEmpty(result))
{
return null;
}
else
{
var fields = JsonConvert.DeserializeObject<List<String>>(result).ToArray();
return fields;
}
}
else
{
return null;
}
}
public static async void GetTelemetryFromDB(string machineId, int period, string field)
{
try
{
var query = new Query();
query.MachineId = machineId;
query.Period = period;
query.Field = field;
var data = JsonConvert.SerializeObject(query);
var request = new AMQPMessage();
request.Sender = _config.Communications.AMQP.Queue;
request.Data = data;
request.Type = AMQPMessageType.Query;
var json = JsonConvert.SerializeObject(request);
//Inizializzo nuovo canale dedicato e riservato al thread corrente
var channel = _amqpconn.CreateChannel();
//Scrivo messaggio query sul canale appena creato
await _amqpconn.SendMessageAsync(_config.Communications.AMQP.Exchange, "database", json, channel);
//Chiudo canale
_amqpconn.CloseChannel(channel);
}
catch (Exception e)
{
log.Error($"Error: {e.Message}");
}
}
public async Task<string[]> GetMachines()
{
//invio richiesta query a microservizio database
Utils.Query q = new Utils.Query { Type = "GetMachines" };
var message = new AMQPMessage { Type = AMQPMessageType.Query, Data = JsonConvert.SerializeObject(q), Sender = "management" };
await _amqpconn.SendMessageAsync("direct_message", "database", JsonConvert.SerializeObject(message));
//ricezione query result
string result = await taskCompletionSource.Task;
var machines = JsonConvert.DeserializeObject<List<String>>(result).ToArray();
return machines;
}