客户需要内部系统与外部服务(SOA或云)之间的交互，他们需要管理、安全加固、整合、以及加强这些服务的访问。
These customers want to talk from internal systems to external services (SOA or cloud) and they want to manage, secure, integrate, and generally enhance the access they get to those services.
可以使用 Spring 上下文管理预打包的服务，整合第三方服务或自己编写服务。
You can use the Spring context to manage prepackaged services, snap in third-party services, or write your own.
这就解释了为什么越多越多的API提供者派发开发者密钥：不仅为了加强这些访问规则或度量访问量，还关系到对整合生态系统的管理。
This is why we see more and more Web API providers issue developer keys: it is not just about enforcing these rules or metering usage, it is also about managing the entire ecosystem.
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