服务请求者通过查找服务代理者那里的被发布服务登记记录来找到服务；
Service requesters find services by searching the Service broker's registry of published services;
服务代理从其可用提供者列表中选择服务提供者。
The service proxy selects a service provider from its list of available providers.
客户机不再直接调用服务提供者，而调用代理中的服务代理，该服务代理将对服务提供者进行调用，如图7所示。
The client no longer invokes the service provider directly, but rather invokes a service proxy in the broker, which in turn invokes the service provider, as shown in Figure 7.
应用推荐