Home Java • Download Java Concurrency in Practice by Joshua Bloch, Douglas Lea, Brian Goetz, Tim Peierls, Joseph PDF

Download Java Concurrency in Practice by Joshua Bloch, Douglas Lea, Brian Goetz, Tim Peierls, Joseph PDF

By Joshua Bloch, Douglas Lea, Brian Goetz, Tim Peierls, Joseph Bowbeer, David Holmes

"I was once lucky certainly to have labored with a beautiful group at the layout and implementation of the concurrency gains extra to the Java platform in Java 5.0 and Java 6. Now this related crew presents the easiest rationalization but of those new positive factors, and of concurrency regularly. Concurrency is not any longer a topic for complicated clients purely. each Java developer may still learn this book."
--Martin Buchholz
JDK Concurrency Czar, solar Microsystems

"For the earlier 30 years, machine functionality has been pushed by means of Moore's legislation; any more, will probably be pushed by way of Amdahl's legislation. Writing code that successfully exploits a number of processors could be very not easy. Java Concurrency in Practice provide you with the thoughts and methods had to write secure and scalable Java courses for today's--and tomorrow's--systems."
--Doron Rajwan
Research Scientist, Intel Corp

"This is the e-book you wish if you're writing--or designing, or debugging, or protecting, or contemplating--multithreaded Java courses. If you've ever needed to synchronize a style and also you weren't definite why, you owe it to your self and your clients to learn this e-book, disguise to cover."
--Ted Neward
Author of Effective firm Java

"Brian addresses the basic concerns and complexities of concurrency with unusual readability. This booklet is a must-read for someone who makes use of threads and cares approximately performance."
--Kirk Pepperdine
CTO, JavaPerformanceTuning.com

"This ebook covers a truly deep and refined subject in a truly transparent and concise method, making it the ideal Java Concurrency reference handbook. each one web page is stuffed with the issues (and solutions!) that programmers fight with each day. successfully exploiting concurrency is turning into progressively more very important now that Moore's legislation is providing extra cores yet no longer speedier cores, and this e-book will help you do it."
--Dr. Cliff Click
Senior software program Engineer, Azul Systems

"I have a robust curiosity in concurrency, and feature most likely written extra thread deadlocks and made extra synchronization errors than so much programmers. Brian's booklet is the main readable concerning threading and concurrency in Java, and offers with this hard topic with an excellent hands-on strategy. this can be a booklet i'm recommending to all my readers of The Java Specialists' Newsletter, since it is attention-grabbing, precious, and correct to the issues dealing with Java builders today."
--Dr. Heinz Kabutz
The Java Specialists' Newsletter

"I've centred a occupation on simplifying easy difficulties, yet this ebook ambitiously and successfully works to simplify a posh yet severe topic: concurrency. Java Concurrency in Practice is innovative in its strategy, soft and straightforward common, and well timed in its delivery--it's destined to be a crucial book."
--Bruce Tate
Author of Beyond Java

" Java Concurrency in Practice is a useful compilation of threading information for Java builders. i discovered examining this publication intellectually intriguing, partly since it is a superb creation to Java's concurrency API, yet more often than not since it captures in a radical and available means professional wisdom on threading now not simply chanced on elsewhere."
--Bill Venners
Author of Inside the Java digital Machine

Threads are a basic a part of the Java platform. As multicore processors turn into the norm, utilizing concurrency successfully turns into crucial for development high-performance functions. Java SE five and six are a tremendous breakthrough for the improvement of concurrent functions, with advancements to the Java digital computing device to aid high-performance, hugely scalable concurrent sessions and a wealthy set of recent concurrency construction blocks. In Java Concurrency in Practice , the creators of those new amenities clarify not just how they paintings and the way to take advantage of them, but in addition the incentive and layout styles at the back of them.

However, constructing, trying out, and debugging multithreaded courses can nonetheless be very tough; it's all too effortless to create concurrent courses that seem to paintings, yet fail while it concerns so much: in construction, lower than heavy load. Java Concurrency in Practice fingers readers with either the theoretical underpinnings and urban ideas for construction trustworthy, scalable, maintainable concurrent functions. instead of easily supplying a list of concurrency APIs and mechanisms, it presents layout ideas, styles, and psychological versions that enable you construct concurrent courses which are either right and performant.

This e-book covers:
• easy options of concurrency and thread protection
• innovations for development and composing thread-safe periods
• utilizing the concurrency construction blocks in java.util.concurrent
• functionality optimization dos and don'ts
• checking out concurrent courses
• complicated subject matters reminiscent of atomic variables, nonblocking algorithms, and the Java reminiscence Model

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Extra info for Java Concurrency in Practice

Sample text

To ensure that all threads see the most up-to-date values of shared mutable variables, the reading and writing threads must synchronize on a common lock. 4 Volatile variables The Java language also provides an alternative, weaker form of synchronization, volatile variables, to ensure that updates to a variable are propagated predictably 38 Chapter 3. Sharing Objects to other threads. When a field is declared volatile, the compiler and runtime are put on notice that this variable is shared and that operations on it should not be reordered with other memory operations.

Volatile variables are convenient, but they have limitations. 4.

1 on page 6 shows what can happen if two threads try to increment a counter simultaneously without synchronization. If the counter is initially 9, with some unlucky timing each thread could read the value, see that it is 9, add one to it, and each set the counter to 10. This is clearly not what is supposed to happen; an increment got lost along the way, and the hit counter is now permanently off by one. You might think that having a slightly inaccurate count of hits in a web-based service is an acceptable loss of accuracy, and sometimes it is.

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