谁需要 (SOAP) 可靠的消息传递？
我发现了一个非常好的反对基于协议（即 SOAP）可靠消息传递的论据。这是一个激烈的话题，还是对此有相当程度的共识？
我认为作者的“荷兰”案例研究也应该包括一个有序的例子。
ps 我希望谷歌有一个“对比”工具，可以找到观点相反的网站。 “Google Contrast”听起来是不是很酷？ :)
I spotted a very good argument against protocol-based (viz. SOAP) reliable messaging. Is this a flame-war topic, or is there a fair degree of consensus about this?
I think the author's "Netherlands" case-study ought to have included an in-order example as well.
p.s. I wish google had a "contrast" tool, that finds sites with opposing points of view. Doesn't "Google Contrast" sound cool? :)
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原则上这并不是反对可靠消息传递，而是反对将其放入传输层。这让我想起了几年前 Mysql 开发人员所说的“你不需要在数据库中使用 $foo，在应用程序层中很容易做到这一点” - 其中 $foo 通常是“事务”或“外键”，或“约束”，或……他们此后决定实施的任何其他事情。
我并不是说 de Graauw 一定是错误的，因为很明显他在他的特定应用程序中不需要可靠的传输，但我确实建议“我不需要 X，因此你也不需要“原则上是错误的概括，在实践中常常是不正确的。
It's not an argument against reliable messaging in principle, but against putting it in the transport layer. It reminds me a little of the Mysql developers years ago saying "you don't need $foo in the database, it's easy to do that in the application layer" - where $foo was typically "transactions", or "foreign keys", or "constraints", or ... any of many other things they've since decided to implement anyway.
I don't mean that to imply that de Graauw is necessarily wrong, as it's clear he has no need for a reliable transport in his particular app, but I do suggest that "I don't need X, therefore you don't either" is a false generalisation in principle and often incorrect in practice.
通过提供握手消息，可以使不可靠的消息传递（即 UDP）变得可靠：
S：你在吗？
答：是的，我在这里。
S：打开门廊灯（这是消息 6）
R：好的。
S：你收到消息6了吗？
答： 抱歉，什么？ （或无响应）
S：打开门廊灯（这是消息 7）
R：已收到消息 7。
R：门廊灯亮。
Unreliable messaging (ie. UDP) can be made reliable by providing handshaking messages:
S: Are you there?
R: Yes, I am Here.
S: Turn On Porch Light (this is Message 6)
R: OK.
S: Did you receive message 6?
R: Sorry, what? (or no response)
S: Turn on Porch light (this is message 7)
R: Message 7 Received.
R: Porch Light is On.