RabbitMQ（三）
官方的使用教程（测试运行）
1、"Hello World!" -- 发送接收
We're about to tell the server to deliver us the messages from the queue. Since it will push us messages asynchronously, we provide a callback. That is what EventingBasicConsumer.Received event handler does.
我们将告诉服务器从队列中发给我们消息。服务器异步地推送给我们消息，我们提供一个回调。这就是 EventingBasicConsumer.Received 事件处理程序做的事。
using RabbitMQ.Client;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks; namespace Send_Simple
{
class Program
{
static void Main(string[] args)
{
var factory = new ConnectionFactory() { HostName = "", UserName = "tangqun", Password = "" };
using (var connection = factory.CreateConnection())
{
using (var channel = connection.CreateModel())
{
channel.QueueDeclare(queue: "hello",
durable: false,
exclusive: false,
autoDelete: false,
arguments: null); string message = "Hello World!";
var body = Encoding.UTF8.GetBytes(message); channel.BasicPublish(exchange: "",
routingKey: "hello",
basicProperties: null,
body: body);
Console.WriteLine(" [x] Send {0}", message);
} Console.WriteLine(" Press [enter] to exit.");
Console.ReadLine();
}
}
}
}
Send_Simple
using RabbitMQ.Client;
using RabbitMQ.Client.Events;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks; namespace Receive_Simple
{
class Program
{
static void Main(string[] args)
{
var factory = new ConnectionFactory() { HostName = "", UserName = "tangqun", Password = "" };
using (var connection = factory.CreateConnection())
{
using (var channel = connection.CreateModel())
{
channel.QueueDeclare(queue: "hello",
durable: false,
exclusive: false,
autoDelete: false,
arguments: null); var consumer = new EventingBasicConsumer(channel);
consumer.Received += (model, ea) =>
{
var body = ea.Body;
var message = Encoding.UTF8.GetString(body);
Console.WriteLine(" [x] Received {0}", message);
};
channel.BasicConsume(queue: "hello",
noAck: true,
consumer: consumer); Console.WriteLine(" Press [enter] to exit.");
Console.ReadLine();
}
}
}
}
}
Receive_Simple
官方测试用例：
Receive_Simple.exe
Send_Simple.exe
结果：Receive 可以接受到消息
2、Work Queues -- 单发多接，只有一个能接受到消息
One of the advantages of using a Task Queue is the ability to easily parallelise work.
简单地并行工作能力是使用 Task Queue 的优势之一。
using RabbitMQ.Client;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks; namespace Send_Work_queues
{
class Program
{
static void Main(string[] args)
{
var factory = new ConnectionFactory() { HostName = "", UserName = "tangqun", Password = "" };
using (var connection = factory.CreateConnection())
{
using (var channel = connection.CreateModel())
{
// Message durability（消息持久机制），关键参数 durable
channel.QueueDeclare(queue: "task_queue",
durable: true /* 持久化机制 */,
exclusive: false,
autoDelete: false,
arguments: null); var message = GetMessage(args);
var body = Encoding.UTF8.GetBytes(message); // 如果 channel.QueueDeclare 中参数 durable 设置为 true，必须加上持久化语句
var properties = channel.CreateBasicProperties();
properties.SetPersistent(true); channel.BasicPublish(exchange: "",
routingKey: "task_queue",
basicProperties: properties,
body: body);
Console.WriteLine(" [x] Send {0}", message);
} Console.WriteLine(" Press [enter] to exit.");
Console.ReadLine();
}
} private static string GetMessage(string[] args)
{
return ((args.Length > ) ? string.Join(" ", args) : "Hello World!");
}
}
}
Send_Work_queues
using RabbitMQ.Client;
using RabbitMQ.Client.Events;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks; namespace Receive_Work_queues
{
class Program
{
static void Main(string[] args)
{
var factory = new ConnectionFactory() { HostName = "", UserName = "tangqun", Password = "" };
using (var connection = factory.CreateConnection())
{
using (var channel = connection.CreateModel())
{
// Message durability（消息持久机制），关键参数 durable
channel.QueueDeclare(queue: "task_queue",
durable: true /* 如果 生产者 设置为 true，相应的 消费者 也需要设置为 true 才会生效 */,
exclusive: false,
autoDelete: false,
arguments: null); // Fair dispatch（公平触发机制）
channel.BasicQos(prefetchSize: , prefetchCount: , global: false); Console.WriteLine(" [*] Waiting for messages."); var consumer = new EventingBasicConsumer(channel);
consumer.Received += (model, ea) =>
{
var body = ea.Body;
var message = Encoding.UTF8.GetString(body);
Console.WriteLine(" [x] Received {0}", message); int dots = message.Split('.').Length - ;
Thread.Sleep(dots * ); Console.WriteLine(" [x] Done"); // 如果 channel.BasicConsume 中参数 noAck 设置为 false，必须加上消息确认语句
// Message acknowledgment（消息确认机制作用）
// consumer dies(its channel is closed, connection is closed, or TCP connection is lost)
channel.BasicAck(deliveryTag: ea.DeliveryTag, multiple: false);
};
channel.BasicConsume(queue: "task_queue",
noAck: false /* Message acknowledgment（消息确认机制） */,
consumer: consumer); Console.WriteLine(" Press [enter] to exit.");
Console.ReadLine();
}
}
}
}
}
Receive_Work_queues
官方测试用例：
Receive_Work_queues.exe
Receive_Work_queues.exe
Send_Work_queues.exe
结果：有且只有一个 Receive 可以接受到消息
3、Publish/Subscribe -- 单发多接，每一个都可以接收到消息
using RabbitMQ.Client;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks; namespace Send_Publish_Subscribe
{
class Program
{
static void Main(string[] args)
{
var factory = new ConnectionFactory() { HostName = "", UserName = "tangqun", Password = "" };
using (var connection = factory.CreateConnection())
{
using (var channel = connection.CreateModel())
{
channel.ExchangeDeclare(exchange: "logs", type: "fanout"); var message = GetMessage(args);
var body = Encoding.UTF8.GetBytes(message);
channel.BasicPublish(exchange: "logs",
routingKey: "",
basicProperties: null,
body: body);
Console.WriteLine(" [x] Sent {0}", message);
} Console.WriteLine(" Press [enter] to exit.");
Console.ReadLine();
}
} private static string GetMessage(string[] args)
{
return ((args.Length > )
? string.Join(" ", args)
: "info: Hello World!");
}
}
}
Send_Publish_Subscribe
using RabbitMQ.Client;
using RabbitMQ.Client.Events;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks; namespace Receive_Publish_Subscribe
{
class Program
{
static void Main(string[] args)
{
var factory = new ConnectionFactory() { HostName = "", UserName = "tangqun", Password = "" };
using (var connection = factory.CreateConnection())
{
using (var channel = connection.CreateModel())
{
channel.ExchangeDeclare(exchange: "logs", type: "fanout"); // Temporary queues
var queueName = channel.QueueDeclare().QueueName;
// Bindings
channel.QueueBind(queue: queueName,
exchange: "logs",
routingKey: ""); Console.WriteLine(" [*] Waiting for logs."); var consumer = new EventingBasicConsumer(channel);
consumer.Received += (model, ea) =>
{
var body = ea.Body;
var message = Encoding.UTF8.GetString(body);
Console.WriteLine(" [x] {0}", message);
};
channel.BasicConsume(queue: queueName,
noAck: true,
consumer: consumer); Console.WriteLine(" Press [enter] to exit.");
Console.ReadLine();
}
}
}
}
}
Receive_Publish_Subscribe
官方测试用例：
Receive_Publish_Subscribe.exe
Receive_Publish_Subscribe.exe
Send_Publish_Subscribe.exe
结果：两个 Receive 都可以接受到信息
4、Routing -- 单发多接，满足路由规则的可以接收到消息
using RabbitMQ.Client;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks; namespace Send_Routing
{
class Program
{
static void Main(string[] args)
{
var factory = new ConnectionFactory() { HostName = "", UserName = "tangqun", Password = "" };
using (var connection = factory.CreateConnection())
{
using (var channel = connection.CreateModel())
{
channel.ExchangeDeclare(exchange: "direct_logs", type: "direct"); var severity = (args.Length > ) ? args[] : "info";
var message = (args.Length > )
? string.Join(" ", args.Skip().ToArray())
: "Hello World!";
var body = Encoding.UTF8.GetBytes(message);
channel.BasicPublish(exchange: "direct_logs",
routingKey: severity,
basicProperties: null,
body: body);
Console.WriteLine(" [x] Sent '{0}':'{1}'", severity, message);
} Console.WriteLine(" Press [enter] to exit.");
Console.ReadLine();
}
}
}
}
Send_Routing
using RabbitMQ.Client;
using RabbitMQ.Client.Events;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks; namespace Receive_Routing
{
class Program
{
static void Main(string[] args)
{
var factory = new ConnectionFactory() { HostName = "", UserName = "tangqun", Password = "" };
using (var connection = factory.CreateConnection())
{
using (var channel = connection.CreateModel())
{
channel.ExchangeDeclare(exchange: "direct_logs", type: "direct"); var queueName = channel.QueueDeclare().QueueName; if (args.Length < )
{
Console.Error.WriteLine("Usage: {0} [info] [warning] [error]",
Environment.GetCommandLineArgs()[]);
Console.WriteLine(" Press [enter] to exit.");
Console.ReadLine();
Environment.ExitCode = ;
return;
} foreach (var severity in args)
{
channel.QueueBind(queue: queueName,
exchange: "direct_logs",
routingKey: severity);
} Console.WriteLine(" [*] Waiting for messages."); var consumer = new EventingBasicConsumer(channel);
consumer.Received += (model, ea) =>
{
var body = ea.Body;
var message = Encoding.UTF8.GetString(body);
var routingKey = ea.RoutingKey;
Console.WriteLine(" [x] Received '{0}':'{1}'", routingKey, message);
};
channel.BasicConsume(queue: queueName,
noAck: true,
consumer: consumer); Console.WriteLine(" Press [enter] to exit.");
Console.ReadLine();
}
}
}
}
}
Receive_Routing
官方测试用例：
Receive_Routing.exe info
Receive_Routing.exe warning
Receive_Routing.exe error
Receive_Routing.exe info warning error
Send_Routing.exe error "Run. Run. Or it will explode."
结果：只有 Receive_Routing.exe error 和 Receive_Routing.exe info warning error 可以接受到消息
5、Topics -- 单发多接，匹配规则的可以接收到消息
using RabbitMQ.Client;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks; namespace Send_Topics
{
class Program
{
static void Main(string[] args)
{
var factory = new ConnectionFactory() { HostName = "", UserName = "tangqun", Password = "" };
using (var connection = factory.CreateConnection())
{
using (var channel = connection.CreateModel())
{
channel.ExchangeDeclare(exchange: "topic_logs", type: "topic"); var routingKey = (args.Length > ) ? args[] : "anonymous.info";
var message = (args.Length > )
? string.Join(" ", args.Skip().ToArray())
: "Hello World!";
var body = Encoding.UTF8.GetBytes(message);
channel.BasicPublish(exchange: "topic_logs",
routingKey: routingKey,
basicProperties: null,
body: body);
Console.WriteLine(" [x] Sent '{0}':'{1}'", routingKey, message);
}
}
}
}
}
Send_Topics
using RabbitMQ.Client;
using RabbitMQ.Client.Events;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks; namespace Receive_Topics
{
class Program
{
static void Main(string[] args)
{
var factory = new ConnectionFactory() { HostName = "", UserName = "tangqun", Password = "" };
using (var connection = factory.CreateConnection())
{
using (var channel = connection.CreateModel())
{
channel.ExchangeDeclare(exchange: "topic_logs", type: "topic"); var queueName = channel.QueueDeclare().QueueName; if (args.Length < )
{
Console.Error.WriteLine("Usage: {0} [binding_key...]", Environment.GetCommandLineArgs()[]);
Console.WriteLine(" Press [enter] to exit.");
Console.ReadLine();
Environment.ExitCode = ;
return;
} foreach (var bindingKey in args)
{
channel.QueueBind(queue: queueName,
exchange: "topic_logs",
routingKey: bindingKey);
} Console.WriteLine(" [*] Waiting for messages. To exit press CTRL+C"); var consumer = new EventingBasicConsumer(channel);
consumer.Received += (model, ea) =>
{
var body = ea.Body;
var message = Encoding.UTF8.GetString(body);
var routingKey = ea.RoutingKey;
Console.WriteLine(" [x] Received '{0}':'{1}'", routingKey, message);
};
channel.BasicConsume(queue: queueName,
noAck: true,
consumer: consumer); Console.WriteLine(" Press [enter] to exit.");
Console.ReadLine();
}
}
}
}
}
Receive_Topics
官方测试用例：
Receive_Topics.exe "#"
Receive_Topics.exe "kern.*"
Receive_Topics.exe "*.critical"
Receive_Topics.exe "kern.*" "*.critical"
Send_Topics.exe "kern.critical" "A critical kernel error"
结果：每一个 Receive 都可以接收到一次消息
6、RPC
using RabbitMQ.Client;
using RabbitMQ.Client.Events;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks; namespace Send_RPC
{
class RPCClient
{
private IConnection connection;
private IModel channel;
private string replyQueueName;
private QueueingBasicConsumer consumer; public RPCClient()
{
var factory = new ConnectionFactory() { HostName = "", UserName = "tangqun", Password = "" };
connection = factory.CreateConnection();
channel = connection.CreateModel();
replyQueueName = channel.QueueDeclare().QueueName;
consumer = new QueueingBasicConsumer(channel);
channel.BasicConsume(queue: replyQueueName,
noAck: true,
consumer: consumer);
} public string Call(string message)
{
var corrId = Guid.NewGuid().ToString();
var props = channel.CreateBasicProperties();
props.ReplyTo = replyQueueName;
props.CorrelationId = corrId; var messageBytes = Encoding.UTF8.GetBytes(message);
channel.BasicPublish(exchange: "",
routingKey: "rpc_queue",
basicProperties: props,
body: messageBytes); while (true)
{
var ea = (BasicDeliverEventArgs)consumer.Queue.Dequeue();
if (ea.BasicProperties.CorrelationId == corrId)
{
return Encoding.UTF8.GetString(ea.Body);
}
}
} public void Close()
{
connection.Close();
}
} class Program
{
static void Main(string[] args)
{
var rpcClient = new RPCClient(); Console.WriteLine(" [x] Requesting fib(30)");
var response = rpcClient.Call("");
Console.WriteLine(" [.] Got '{0}'", response); rpcClient.Close();
}
}
}
Send_RPC
using RabbitMQ.Client;
using RabbitMQ.Client.Events;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks; namespace Receive_RPC
{
class Program
{
static void Main(string[] args)
{
var factory = new ConnectionFactory() { HostName = "", UserName = "tangqun", Password = "" };
using (var connection = factory.CreateConnection())
using (var channel = connection.CreateModel())
{
channel.QueueDeclare(queue: "rpc_queue",
durable: false,
exclusive: false,
autoDelete: false,
arguments: null); // Fair dispatch（公平触发机制）
channel.BasicQos(prefetchSize: , prefetchCount: , global: false); var consumer = new QueueingBasicConsumer(channel); channel.BasicConsume(queue: "rpc_queue",
noAck: false,
consumer: consumer); Console.WriteLine(" [x] Awaiting RPC requests"); while (true)
{
string response = null;
var ea = (BasicDeliverEventArgs)consumer.Queue.Dequeue(); var body = ea.Body;
var props = ea.BasicProperties;
var replyProps = channel.CreateBasicProperties();
replyProps.CorrelationId = props.CorrelationId; try
{
var message = Encoding.UTF8.GetString(body);
int n = int.Parse(message);
Console.WriteLine(" [.] fib({0})", message);
response = fib(n).ToString();
}
catch (Exception e)
{
Console.WriteLine(" [.] " + e.Message);
response = "";
}
finally
{
var responseBytes = Encoding.UTF8.GetBytes(response);
channel.BasicPublish(exchange: "",
routingKey: props.ReplyTo,
basicProperties: replyProps,
body: responseBytes);
channel.BasicAck(deliveryTag: ea.DeliveryTag,
multiple: false);
}
}
}
} /// <summary>
/// Assumes only valid positive integer input.
/// Don't expect this one to work for big numbers,
/// and it's probably the slowest recursive implementation possible.
/// </summary>
private static int fib(int n)
{
if (n == || n == )
{
return n;
} return fib(n - ) + fib(n - );
}
}
}
Receive_RPC
官方测试用例：
Receive_RPC.exe
Send_RPC.exe
Send_RPC.exe
结果：两个 Send（correlationId） 都发送请求，每个 Send 只会打印对应 correlationId 请求的响应
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