The specification defines a message exchange protocol between the BPEL engine and a task component.
这个规范定义了BPEL引擎和任务组件之间的消息交换协议。
The WS-Addressing policy type is required if you are to use an asynchronous message exchange protocol.
如果要使用异步消息交换协议，需要WS - Addressing策略类型。
An asynchronous message exchange protocol is the more difficult approach to implement and can have more impact on the service provider environment.
异步消息交换协议更难实现，对服务提供者环境的影响也更大。
The second problem identified in the logging service example was the blocking of the service requestor process as a result of the synchronous message exchange protocol.
登录服务例子中发现的第二个问题是同步消息交换协议阻塞了服务请求者的处理。
A synchronous message exchange protocol is the easier approach to implement and has the least impact on the service provider environment.
同步消息交换协议更容易实现，对服务提供者环境的影响也最小。
A synchronous message exchange protocol is the easier approach to implement and has the least impact on the service provider environment.
同步消息交换协议更容易实现，对服务提供者环境的影响也最小。
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