January 2018
Intermediate to advanced
350 pages
9h 7m
English
Content preview from Java EE 8 High Performance
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Concurrent data access
When a single thread accesses data, then the access is always thread-safe, and it is not possible for a thread to mutate data while another one is reading it. When you increase the number of threads and multiple threads can access the same data structure instances, it is possible for a thread to read the data that's currently being modified, or for two concurrent modifications to happen, leading to an inconsistent result.
Here is a schema representing this issue with two threads. Keep in mind that a Java EE server often handles around 100 to 1000 threads, so the effects are more impacting:
In this simple example, we ...
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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.