Multicast注册中心

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Multicast注册中心
  提供方启动时广播自己的地址。
  消费方启动时广播订阅请求。
  提供方收到订阅请求时,单播自己的地址给订阅者,如果设置了unicast=false,则广播给订阅者。
  消费方收到提供方地址时,连接该地址进行RPC调用。


<dubbo:registry address="multicast://224.5.6.7:1234" />
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或者

<dubbo:registry protocol="multicast" address="224.5.6.7:1234" />
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为了减少广播量,Dubbo缺省使用单播发送提供者地址信息给消费者,
如果一个机器上同时启了多个消费者进程,消费者需声明unicast=false,否则只会有一个消费者能收到消息:


<dubbo:registry address="multicast://224.5.6.7:1234?unicast=false" />
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或者


<dubbo:registry protocol="multicast" address="224.5.6.7:1234"> <dubbo:parameter key="unicast" value="false" /> </dubbo:registry>

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