November 2008
Intermediate to advanced
784 pages
23h 28m
English
Content preview from Programming WCF Services, 2nd EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Reliability
WCF and other service-oriented technologies make a distinction between transport reliability and message reliability. Transport reliability (such as that offered by TCP/IP) offers point-to-point guaranteed delivery at the network packet level, and also guarantees in-order delivery of the packets. Transport reliability is not resilient to dropped network connections and a variety of other communication problems.
Message reliability, as the name implies, deals with reliability at the message level, independent of how many packets are required to deliver the message. Message reliability provides for end-to-end guaranteed delivery and order of messages, regardless of how many intermediaries are involved and how many network hops are required to deliver the message from the client to the service. Message reliability is based on an industry standard for reliable message-based communication that maintains a session at the transport level and supports retries in case of transport failures such as dropping a wireless connection. It automatically deals with congestion, message buffering, and flow control and can adjust the flow of messages accordingly. Message reliability also deals with connection management, verifying connections and cleaning them up when they are no longer needed.
Tip
Message reliability does not guarantee message delivery. All it provides is a guarantee that if the message does not reach its destination, the sender will know about it.
Bindings, Reliability, and ...
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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.
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