May 2007
Intermediate to advanced
610 pages
20h 14m
English
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Reliable Sessions
When you send messages to a remote service, ideally you’d like to be sure they get there. If the message doesn’t arrive, you probably want to resend it and try again. At a minimum, you want to know if the message has never arrived so that you can take corrective action. These delivery assurances are provided by some transport protocols such as TCP and named pipes, but not by the likes of HTTP. Even so, with TCP and named pipes, these assurances can be guaranteed only from point-to-point. If an intermediary, such as a proxy server or message router, exists between the sending and receiving applications, there are no guarantees beyond the assurance that the message reached the first network node in transit.
Reliable sessions improve application reliability in the following manner:
Messages can be guaranteed to be delivered exactly once and in order, withstanding transient hiccups in network connectivity.
These delivery assurances are not tied to a particular protocol, thus reliability is possible for HTTP protocol, for example.
End-to-end reliability is supported so that message delivery is reliable over multiple hops.
Reliability is based on the entire SOAP message, not just on individual IP packets.
Reliable sessions are based on interoperable protocols, so delivery can be guaranteed between disparate operating and development platforms.
There is no question that reliability is necessary, but the decision to use reliable sessions is usually driven by the need to add reliability ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.