There was a bid for 10W to publish this 384 JDK source code note. This note describes the author's unique insights on the JDK source code over the past ten years of work. This note conducts a comprehensive source code analysis of the entire Concurrent package. The implementation of most concurrency functions in JDK8 is the same as JDK7, but some additional features have been added. For example, the new implementation of CompletableFuture, ConcurrentHashMap, StampedLock, LongAdder, etc. The analysis of the source code of the entire Concurrent package has the following purposes:
(1) Help users choose solutions reasonably. The Concurrent package is very large, with various thread exclusion and synchronization mechanisms. Understand the implementation principle, users can choose the most suitable solution according to their own business scenarios. Avoid re-creating wheels, and avoid falling into the "pit" due to improper use.
(2) The analysis of the source code will allow users to understand the underlying principles of memory barriers, CAS atomic operations, locks, and lock-free, and will no longer stay in a "paradoxical" stage, but deeply understand their essence.
(3) Absorb the thinking of masters. In the Concurrent package, you can see various ingenious concurrent processing strategies. Looking at the Concurrent package, you will find that in multithreading, there are not only simple mutex locks, notification mechanisms, and thread pools.
This note is divided into 8 knowledge modules, starting from the basis of multithreading! Free access is at the end of the article
Chapter 1 Multithreading Basics,
1.1 Graceful shutdown of threads
1.2 InterruptedException () function and interrupt () function
1.3 synchronized keyword
1.4wait () and notify ()
1.5 volatile keyword
1.6 JMM与happen-before
1.7 Memory barrier
1.8 final keyword
1.9 Comprehensive application: lock-free programming
Chapter 2 Atomic Class
2.1 AtomicInteger和AtomicLong
2.2 AtomicBoolean和AtomicReference
2.3 AtomicStampedReference和AtomicMarkableReference
2.4 AtomicIntegerFieldUpdater. AtomicLongFieldUpdater和AtomicReferenceFieldUpdater
2.5 AtomicIntegerArray. AtomicLongArray和Atomic-ReferenceArray
2.6 Striped64 and LongAdder
Chapter 3 Lock and Condition
3.1 Mutex
3.2 Read-write lock
3.3 Condition
3.4 StampedLock
Chapter 4 Synchronization Tools
4.1 Semaphore
4.2 CountDownLatch
4.3 CyclicBarrier
4.4 Exchanger
4.5 Phaser
Chapter 5 Concurrent Containers
5.1 BlockingQueue
5.2 BlockingDeque
5.3 CopyOnWrite
5.4 ConcurrentLinkedQueue / Deck
5.5 ConcurrentHashMap
5.6 ConcurrentSkipListMap/Set
Chapter 6 Thread Pool and Future
6.1 The realization principle of thread pool
6.2 The class inheritance system of thread pool
6.3 ThreadPoolExector
6.4 Callable与Future
6.5 ScheduledThreadPoolExecutor
6.6 Executors tools
Chapter 7 ForkJoinPool
7.1 ForkJoinPool usage
7.2 Core data structure
7.3 Work stealing queue
7.4 ForkJoinPool status control
7.5 Blocking-Wake-up Mechanism of Worker Thread
7.6 Analysis of task submission process
7.7 Work stealing algorithm: analysis of task execution process
7.8 ForkJoinTask的fork/join
7.9 Graceful closure of ForkJoinPool
Chapter 8 CompletableFuture
8.1 CompletableFuture usage
8.2 Four mission prototypes
8.3 CompletionStage interface
8.4 Internal Principle of CompletableFuture
8.5 Mesh execution of tasks: directed acyclic graph
8.6 Analysis of calculation graph inside allOf
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