JCA resource adapters are hosted by application servers that control their life cycle through a set of Service Provider Interfaces (SPI) defined by JCA specifications as System Contracts.
JCA资源适配器由应用服务器承载，这些应用服务器通过JCA规范作为系统协议定义的一组Service ProviderInterfaces (SPI)来控制资源适配器的生命周期。
PaaS is a type of cloud service in which the provider delivers not only on-demand hardware and operating-system services, but also application platforms and solution stacks.
PaaS是一种云服务类型，其中供应商不但提供按需硬件和操作系统服务，而且还提供应用程序平台和解决方案堆栈。
PaaS is a type of cloud service in which the provider delivers not only on-demand hardware and operating-system services, but also application platforms and solution stacks.
PaaS是一种云服务类型，其中供应商不但提供按需硬件和操作系统服务，而且还提供应用程序平台和解决方案堆栈。
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