April 2002
Beginner to intermediate
1128 pages
26h 33m
English
book
Sams Teach Yourself J2EE™ in 21 Days
by Martin Bond, Dan Haywood, Debbie Law, Andy Longshaw, Peter Roxburgh
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Servlet Threads
In the AuditFilter example, several lines of code were encased in a synchronize block. This was done to ensure that the counter would be correctly incremented if more than one access is made to the page at the same time. Without the synchronize block, it is possible for two (or possibly more) servlet threads to obtain the counter value before it has been incremented, thereby losing one of the increments. In this case, failing to count one page hit is not a significant problem. There are other situations where it might be.
Shared resources, such as files and databases, can also present concurrency issues when accessed by more than one servlet at a time. To avoid concurrency issues, a servlet can implement the single-thread model. ...
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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.