111 lines
3.9 KiB
C#
111 lines
3.9 KiB
C#
using Api.DBAccess;
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using Api.Models;
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using RabbitMQ.Client;
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using RabbitMQ.Client.Events;
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using System.Text;
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using System.Text.Json;
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using System.Threading.Channels;
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namespace Api.AMQPReciever
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{
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public class AMQPReciever
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{
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private readonly IConfiguration _configuration;
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private readonly DbAccess _dbAccess;
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private IConnection _conn;
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private IChannel _channel;
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private ConnectionFactory _factory;
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private string _queue;
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public AMQPReciever(IConfiguration configuration, DbAccess dbAccess)
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{
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_dbAccess = dbAccess;
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_configuration = configuration;
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_factory = new ConnectionFactory();
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_queue = "temperature-logs";
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InitFactory();
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}
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public async Task Handle_Received_Application_Message()
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{
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await Connect();
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// Everytime a message is recieved from the queue it goes into this consumer.ReceivedAsync
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var consumer = new AsyncEventingBasicConsumer(_channel);
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consumer.ReceivedAsync += (model, ea) =>
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{
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Console.WriteLine("Received application message.");
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var body = ea.Body.ToArray();
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var message = Encoding.UTF8.GetString(body);
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var messageReceive = JsonSerializer.Deserialize<MessageReceive>(message);
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// Checks if the message has the data we need
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if (messageReceive == null || messageReceive.device_id == null || messageReceive.timestamp == 0)
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{
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return Task.CompletedTask;
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}
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// Convert to the model we use in the database and gets the device from the database that is used for getting the current set temphigh and templow
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TemperatureLogs newLog = new TemperatureLogs();
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string refernceId = messageReceive.device_id;
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var device = _dbAccess.ReadDevice(refernceId);
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// Checks if the device exist if it doesn't it throws the data away
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if (device == null) { return Task.CompletedTask; }
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newLog.Temperature = messageReceive.temperature;
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newLog.Date = DateTimeOffset.FromUnixTimeSeconds(messageReceive.timestamp).DateTime;
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newLog.TempHigh = device.TempHigh;
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newLog.TempLow = device.TempLow;
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// Send the data to dbaccess to be saved
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_dbAccess.CreateLog(newLog, refernceId);
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return Task.CompletedTask;
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};
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// Consumes the data in the queue
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await _channel.BasicConsumeAsync(_queue, true, consumer);
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while (true);
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await Dispose();
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}
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// Disconnects from rabbitMQ
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private async Task<bool> Dispose()
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{
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await _channel.CloseAsync();
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await _conn.CloseAsync();
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await _channel.DisposeAsync();
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await _conn.DisposeAsync();
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return true;
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}
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// Connects to rabbitMQ
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private async Task<bool> Connect()
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{
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// Creating a new connection to rabbitMQ
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_conn = await _factory.CreateConnectionAsync();
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Console.WriteLine("AMQPClient connected");
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_channel = await _conn.CreateChannelAsync();
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// Here we connect to the queue through the channel that got created earlier
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await _channel.QueueDeclareAsync(queue: _queue, durable: false, exclusive: false, autoDelete: false);
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Console.WriteLine($"{_queue} connected");
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return true;
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}
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// The info for the factory
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private void InitFactory()
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{
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_factory.UserName = _configuration["AMQP:username"];
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_factory.Password = _configuration["AMQP:password"];
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_factory.HostName = _configuration["AMQP:host"];
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_factory.Port = Convert.ToInt32(_configuration["AMQP:port"]);
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}
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}
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}
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