//method for sending messages, serializes the object to string and sends it over the channel
public static void SendMessage(MessageBody message)
{
var factory = new ConnectionFactory()
{
HostName = rabbitConfig.Host
};
using (var connection = factory.CreateConnection())
using (var channel = connection.CreateModel())
{
channel.QueueDeclare(queue: rabbitConfig.Queue,
durable: true,
exclusive: false,
autoDelete: false,
arguments: null);
//turn object to JSON string
var body = Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(message));
//send message to queue
channel.BasicPublish(exchange: rabbitConfig.Exchange,
routingKey: rabbitConfig.RoutingKey,
basicProperties: null,
body: body);
}
}
static void Main(string[] args)
{
//create builder for configuration file
var builder = new ConfigurationBuilder()
.SetBasePath(Directory.GetCurrentDirectory())
.AddJsonFile("appsettings.json")
.Build();
// Then get your values using this approach
rabbitConfig = builder.GetSection("RabbitMQConfig").Get <RabbitMQConfig>();
Console.WriteLine("************Example for RabbitMQ Chat using publish/subscribe************");
Console.WriteLine("Please enter your name:");
Nickname = Console.ReadLine();
Console.WriteLine($"Hello {Nickname}, now you can send messages to others. To exit chat simpy type 'exit' and hit enter. ");
//setup factory for rabbitMQ
var factory = new ConnectionFactory()
{
HostName = rabbitConfig.Host
};
//setup connection for rabbitMQ
var connection = factory.CreateConnection();
var channel = connection.CreateModel();
//setup channel for specified queue
channel.QueueDeclare(queue: rabbitConfig.Queue,
durable: true, //the queue will survive a broker restart
exclusive: false, // if true, used by only one connection and the queue will be deleted when that connection closes
autoDelete: false, // if true, queue that has had at least one consumer is deleted when last consumer unsubscribes
arguments: null);
//declare consumer and it's event for receiving
var consumer = new EventingBasicConsumer(channel);
consumer.Received += (model, ea) =>
{
var body = ea.Body.ToArray();
try
{
// try parsing the message back to it's object instance, and show only message from other user
MessageBody message = JsonConvert.DeserializeObject <MessageBody>(Encoding.UTF8.GetString(body));
if (!message.Name.Equals(Nickname))
{
Console.WriteLine($"{message.Created.ToString("dd-MM-yyyy HH:mm")} {message.Name}: {message.Message}");
}
}
catch { }
};
//sets the queue for channel
channel.BasicConsume(queue: rabbitConfig.Queue,
autoAck: true,
consumer: consumer);
//read message and loop for reading and sending messages
String msg = Console.ReadLine();
while (!msg.Equals("exit"))
{
Console.WriteLine($"{DateTime.Now.ToString("dd-MM-yyyy HH:mm")} {Nickname}:{msg}");
MessageBody m = new MessageBody();
m.Name = Nickname;
m.Created = DateTime.Now;
m.Message = msg;
SendMessage(m);
msg = Console.ReadLine();
}
//close connection and app will also close, when user types in 'exit' and hits enter
connection.Close();
}