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23.7. 配置 EJB 异步调用服务
23.7.1. EJB3 异步调用服务
异步调用服务（Asynchronous Invocation Service）是一个 EJB 容器服务，它管理 Session Bean 方法的异步调用。这个服务维护着可配置的数量的线程（线程池），分配给异步方法调用。
Enterprise JavaBeans 3.1 允许对 Session Bean（stateful、stateless 或 singleton）的任何方法进行注解以允许异步执行。
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