消息交换模式 汇总

SOAP传输消息交换模式一般包括四种：

1. 单向 (One-Way)：服务方单方面接收SOAP消息。(比如简单的数据接受服务)
2. 请求响应 (Request-Response)：服务方接收调用方的调用SOAP消息，然后向调用方发送响应SOAP消息。(通常的服务调用)
3. 要求响应 (Solicit-Response)：服务方向使用者发送SOAP消息，然后接收使用者的响应SOAP消息。(比如定时通知服务，并且对于重要通知要求用户给出回执)
4. 通知 (Notification)：服务方单方面发送SOAP消息。

Message exchange pattern (MEP) A definition of the sequence of messages in a service
call or service operation. This sequence includes the order, direction, and cardinality
of the messages sent around until a specific service operation is done.
The most important message exchange patterns are one-way, request/response, and
request/callback (asynchronous request/response).
For example, the request/response MEP defines that a consumer sends a request
message and waits for the answer, which is sent by the provider as a response message.