SOA applications run on a heavy middleware stack or a platform.
SOA 应用程序在重型中间件堆栈或平台上运行。
Typically, the operating system and any middleware stack are customized and hidden from the end user.
通常，操作系统和任何中间件堆栈都经过了自定义，对最终用户隐藏。
There's a high dependence of performance and load-bearing capability on the middleware stack and legacy applications (in production environment).
性能和负载承载能力非常依赖于中间件堆栈和遗留应用程序(在生产环境中)。
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