快速阅读
介绍exchange的topic类型,和Direct类型相似,但是增加了"."和"#"的匹配。比Direct类型灵活
Topic消息类型
特点是:topic消息类型不能是任意的routing key, 必须是有点"."组成的单词列表。
和dirct类似,最后也是也相应的key进行匹配
例如:speed.color.sepcies
注意可以用*号和#号出现,和我们日常用的正则表达式含义相近
"*"号代表任意一个单词
"#"号代表0个或多个单词
生产者代码
- 创建连接和信道
- 声明exchange类型
- 设置两个routingkey 各自发送两次。一共发送四条消息
static void Main(string[] args)
{
var factory = new ConnectionFactory() { HostName = "localhost" };
using (var connection = factory.CreateConnection())
using (var channel = connection.CreateModel())
{
channel.ExchangeDeclare(exchange: "topicType", type: "topic");
var list = new List<string>();
list.Add("www.baidu.com");
list.Add("www.google.com");
for (var i = 0; i < 2; i++)
{
var routingKey = list[0];
string message = "Hello World!this message routingkey is " + routingKey;
var body = Encoding.UTF8.GetBytes(message);
var properties = channel.CreateBasicProperties();
properties.Persistent = true;
channel.BasicPublish(exchange: "topicType",
routingKey: routingKey,
basicProperties: null,
body: body);
Console.WriteLine(" [x] Sent {0},id={1}", message,i);
Thread.Sleep(1000);
}
for (var i = 0; i < 2; i++)
{
var routingKey = list[1];
string message = "Hello World!this message routingkey is " + routingKey;
var body = Encoding.UTF8.GetBytes(message);
var properties = channel.CreateBasicProperties();
properties.Persistent = true;
channel.BasicPublish(exchange: "topicType",
routingKey: routingKey,
basicProperties: null,
body: body);
Console.WriteLine(" [x] Sent {0},id={1}", message, i);
Thread.Sleep(1000);
}
}
Console.WriteLine(" Press [enter] to exit.");
Console.ReadLine();
}
消费者代码
- 创建连接和信道
- 为了测试 topic 类型,限制输入中含 有baidu,google两个关键词和发送的routing key相匹配。
- 声明交换器类型
- 队列声明
- 把exchange和队列绑定到信道上
- 接受消息
static void Main(string[] args)
{
bool flag = true;
string level = "";
while (flag)
{
Console.WriteLine("请选择要查看的消息类型");
level = Console.ReadLine();
if (level.IndexOf(".baidu.")>0 || level.IndexOf(".google.") > 0 )
flag = false;
else
Console.Write("不支持你输入的消息");
}
var factory = new ConnectionFactory() { HostName = "localhost" };
using (var connection = factory.CreateConnection())
{
using (var channel = connection.CreateModel())
{
channel.ExchangeDeclare(exchange: "topicType", type: "topic");
var queueName = channel.QueueDeclare().QueueName;
channel.QueueBind(queue: queueName, exchange: "topicType", routingKey: level);
//以下是区别生产者的
var consumer = new EventingBasicConsumer(channel);
consumer.Received += (sender, e) =>
{
var body = e.Body;
var message = Encoding.UTF8.GetString(body);
var rk = e.RoutingKey;
Console.WriteLine("Received {0},routingKey:{1}", message, rk);
Thread.Sleep(3000);//模拟耗时任务 ,
Console.WriteLine("Received over");
channel.BasicAck(deliveryTag: e.DeliveryTag, multiple: false);
};
channel.BasicConsume(queue: queueName, autoAck: false, consumer: consumer);
Console.WriteLine("");
Console.ReadLine();
}
}
测试结果
我们启动消费者以后,输入四个routingkey去测试
分别是
.google.#, #.google. , .google.com, .baidu.com
分别监听中间是google 或者baidu的消息
结果符合要求
还不快抢沙发