必须显式管理事务上下文将增加JPA编程模型的复杂性。
Having to explicitly manage the transactional context would add complexity to the JPA programming model.
这可以大大节约时间和内存，尽管它要求程序员显式管理池中的对象。
This produces a great savings of time and memory, although it requires the programmer to explicitly manage objects in the pool.
ESB 模式通过其对请求者/提供者交互的显式管理提高了此基本 SOA 功能。
The ESB pattern improves upon this basic SOA capability through its explicit management of requester-provider interactions.
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