Concurrent programming
The four words concurrent programming must have been discussed in many posts on the Internet recently. We all know that there are multi-process, multi-thread and multi-coroutine options for concurrent programming. In Java, concurrency is a multi-threaded model. And multi-threaded programming has always been a field that has been widely and deeply discussed. If you encounter complex multi-threaded programming scenarios, in most cases we need to stand on the shoulders of giants and use the concurrent programming framework-the JDK Concurrent package to solve related threading problems.
Is the Concurrent package complicated?
I believe that many people have a little knowledge of Concurrent concurrent packages, let alone Concurrent package source code. (It's another matter for the big cow) It can be said that if the Concurrent package and its source code have a certain understanding, it can completely avoid re-creating wheels, and also avoid falling into the "pit" due to improper use, let alone staying in a "paradox" "Stage. So the question is, how to learn? Don't panic, Internet Lei Feng (in my editor) got a copy from a Meituan old man some time ago: Java Concurrent JDK Source Code Analysis Collection. After reading it, I will post with you and share it with you!
Not much bb, let's upload the content directly!
Due to space limitations, this document has a total of 384 pages. The editor can’t show them all for everyone. I hope to forgive me. Friends in need can help with one-click triple connection. See the picture below and add the assistant VX (gyhycx7980) to 100. % Get the high-definition document for free!
Multithreading basics
- Graceful closure of threads
- stop () and destroy () functions
- Daemon thread
- Set the closed flag
- synchronized keyword
- What is the lock object
- What is the nature of the lock
- Synchronized realization principle
- wait（）与notify（）
- Producer-consumer model
- Why must be used with synchronized
- Why must the lock be released when wait ()
- wait () and notify ()
- volatile keyword
- 64-bit write atomicity (Half Write)
- Memory visibility
- Reordering: DCL issues
- Comprehensive application: lock-free programming
- One write one read lock-free queue: memory barrier
- Lock-free queue with one write and many read: volatile keyword
- Lock-free queue with multiple writes and reads: CAS
- Lock-free stack
- Unchained watch
Atomic class
Due to space limitations, this document has a total of 384 pages. The editor can’t show them all for everyone. I hope to forgive me. Friends in need can help with one-click triple connection. See the picture below and add the assistant VX (gyhycx7980) to 100. % Get the high-definition document for free!
Lock and Condition
- Mutex
- Read-write lock
- Condition
- StampedLock
Synchronization tools
Concurrent container
- BlockingQueue
- ArrayBlockingQueue
- LinkedBlockingQueue
- PriorityBlockingQuueue
- DelayQueue
- SynchronousQueue
- BlockingDeque
- CopyOnWrite
- CopyOnWriteArrayList
- CopyOnWriteArraySet
- CncrertinkedQueue / recount
- CorcurrentHashMap
- Implementation in JDK 7
- Implementation in JDK 8
- CnucrenskiplistMap/Set
- ConcurrentSkipListMap
- ConcurrentSkipListSet
Thread pool and Future
- The realization principle of thread pool
- Class inheritance system of thread pool
- ThreadPoolExector
- Core data structure
- Core configuration parameter explanation
- Graceful shutdown of the thread pool
- Analysis of task submission process
- Task execution process analysis
- 4 rejection strategies for thread pools
- Callable与Future
- ScheduledThreadPoolExecutor
- Executors tools
ForkJoinPool
- ForkJoinPool usage
- Work stealing queue
- Work stealing algorithm: analysis of task execution process
- Sequence lock eqLock
- scanGuard analysis
CompletableFuture
- CompletableFuture internal principle
- Construction of CompletableFuture: ForkJoinPool
- Task type adaptation
- Analysis of task chain execution process
- The difference between thenApply and thenApplyAsync
- Mesh execution of tasks: directed acyclic graph
Due to space limitations, this document has a total of 384 pages. I can’t show you all of it. I hope to forgive me.
Write at the end
In addition to considering static resources, deadlocks, resource fairness and other issues for concurrency, performance issues often need to be considered. In some business scenarios, it is often more complicated, which poses no small problems for java coder. If you have a certain understanding of the concurrent package, you can solve many problems. Friends in need can help with one-click triple connection, see the picture below and add the assistant VX (gyhycx7980) to get it 100% free!
