RabbitMQ 三種Exchange

Direct Exchange – 處理路由鍵。需要將一個隊列綁定到交換機上，要求該消息與一個特定的路由鍵完全匹配。這是一個完整的匹配。如果一個隊列綁定到該交換機上要求路由鍵 “dog”，則只有被標記爲“dog”的消息才被轉發，不會轉發dog.puppy，也不會轉發dog.guard，只會轉發dog。

Channel channel = connection.createChannel();
channel.exchangeDeclare("exchangeName", "direct"); //direct fanout topic
channel.queueDeclare("queueName");
channel.queueBind("queueName", "exchangeName", "routingKey");

byte[] messageBodyBytes = "hello world".getBytes();
//需要綁定路由鍵
channel.basicPublish("exchangeName", "routingKey", MessageProperties.PERSISTENT_TEXT_PLAIN, messageBodyBytes);

Fanout Exchange – 不處理路由鍵。你只需要簡單的將隊列綁定到交換機上。一個發送到交換機的消息都會被轉發到與該交換機綁定的所有隊列上。很像子網廣播，每臺子網內的主機都獲得了一份複製的消息。Fanout交換機轉發消息是最快的。

Channel channel = connection.createChannel();
channel.exchangeDeclare("exchangeName", "fanout"); //direct fanout topic
channel.queueDeclare("queueName");
channel.queueBind("queueName", "exchangeName", "routingKey");

channel.queueDeclare("queueName1");
channel.queueBind("queueName1", "exchangeName", "routingKey1");

byte[] messageBodyBytes = "hello world".getBytes();
//路由鍵需要設置爲空
channel.basicPublish("exchangeName", "", MessageProperties.PERSISTENT_TEXT_PLAIN, messageBodyBytes);

Topic Exchange – 將路由鍵和某模式進行匹配。此時隊列需要綁定要一個模式上。符號“#”匹配一個或多個詞，符號“*”匹配不多不少一個詞。因此“audit.#”能夠匹配到“audit.irs.corporate”，但是“audit.*” 只會匹配到“audit.irs”。

Channel channel = connection.createChannel();
channel.exchangeDeclare("exchangeName", "topic"); //direct fanout topic
channel.queueDeclare("queueName");
channel.queueBind("queueName", "exchangeName", "routingKey.*");

byte[] messageBodyBytes = "hello world".getBytes();
channel.basicPublish("exchangeName", "routingKey.one", MessageProperties.PERSISTENT_TEXT_PLAIN, messageBodyBytes);

轉載地址：http://melin.iteye.com/blog/691265