March 2002
Intermediate to advanced
280 pages
8h 36m
English
Content preview from Java Web ServicesBecome 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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The P2P Model
The SOA provides a powerful framework for building next-generation applications. However, for some enterprises, the centralized hub-and-spoke structure of the SOA is too inflexible. Some enterprises want to build web service solutions that require real-time views of work in progress, inventories, logistics, etc. Other businesses want to exploit highly successful peer-to-peer (P2P) applications, such as instant messaging and content distribution.
The P2P approach differs from the SOA in that no attempt is made to define explicit roles. Any node, or peer, can operate in any role it knows about or can discover through other peers on the P2P network. We often think that this “be whatever you can discover” capability makes the P2P model more suitable for doing web services than the SOA.
Despite its legal problems, looking at an application such as Napster (or its close relative, Gnutella) from a web services perspective is useful. Users publish the files they are willing to share and these files are listed in a registry. (Napster had a centralized database that served as a registry and Gnutella has a distributed searching mechanism, which is essentially a virtual registry.) Other users can search the registry (physical or virtual) and download files directly from the provider. This process maps nicely onto the SOA, except that there’s no clear distinction between provider and requestor or even (in the case of Gnutella) requestor and directory. Peers establish ad hoc, short-term ...
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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.
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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.