August 2011
Intermediate to advanced
280 pages
6h 50m
English
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Software Transactional Memory
The separation of identity from state helps STM solve the two major concerns with synchronization: crossing the memory barrier and preventing race conditions. We’ll first look at STM in the context of Clojure and then use it in Java.
Clojure removes the menacing details of memory synchronization (see Programming Clojure [Hal09] and The Joy of Clojure [FH11]) by placing access to memory within transactions. Clojure keenly watches over and coordinates the activities of threads. If there are no conflicts—for example, threads working with different accounts—then no locks are involved, and there are no delays, resulting in maximum concurrency. When two threads try to access the same data, the transaction manager steps ...
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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.