Alibaba recently released a booklet of in-depth analysis of the JDK source code, which can also be said to be the beginning of 2021! The editor came to share with you as soon as I got it! ! ! I hope it will be helpful to you who have "ideas" for the gold three silver four!
This Alibaba JDK source code notes deeply analyzes every part of the Java Concurrent package, and also conducts an in-depth study on the principle of concurrency! The content of this note includes the basics of multithreading, Atomic class, Lock and Condition, synchronization tool class, concurrent container, thread pool and Future, ForkJoinPool, CompletableFuture!
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Multithreading basics
A thread is "a piece of code in action", or a function in action. Since it is running, there is a basic question: Can a half-running thread be forcibly killed?
Atomic class
LongAdder principle
Lock and Condition
The realization principle of "optimistic reading"
Synchronization tools
This part will analyze the implementation principles of all synchronization tools.
Concurrent container
2. Enqueue
Thread pool and Future
The realization principle of the thread pool: the caller continuously submits tasks to the thread pool; there is a group of threads in the thread pool, which constantly takes tasks from the queue, which is a typical producer-consumer model.
ForkJoinPool
State variable ctl analysis
CompletableFuture
Analysis of task chain execution process
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