cobia

TODO

• subscribe to the change of providers using zookeeper, use provider list in local cache at first.
• develop cluster consumer: invoke the least active service.

cobia tag

<cobia:service />

name	optional	type	description
interface	required	string	Interface implemented by service
ref	required	string	bean id of service
registry	optional	string	registry address
weight	optional	int	weight to invoke the service

<cobia:reference />

name	optional	type	description
id	required	string	id of this reference
interface	required	string	Interface of reference
registry	optional	string	registry method:direct, zookeeper
serviceServer	optional	string	serviceServer value is provider address(host:port) when registry is direct

<cobia:registry />

name	optional	type	description
type	required	string	value(direct, zookeeper) of registry type
address	optional	string	address of registry