5. Lockless Shared Mode (top), CAS, Atomics

Contents of this Chapter CAS and volatileAtomic IntegerAtomic ReferenceAtomic accumulatorUnsafe 1. Questions raised There are requirements below to ensure accont. Thread security for withdraw withdraw method public interface Account { // Get Balance Integer getBalance(); // Withdraw money void withdraw(Integer amount); ...

Added by Azazeal on Wed, 09 Mar 2022 19:34:20 +0200

Discussion on ThreadLocal in Java Concurrent Programming

ThreadLocal may be rarely used in the normal development process, but it is indispensable for thread operation. In particular, the communication between threads through Handler is an important part. In this article, I will help you analyze the use and internal principle of ThreadLocal. What is ThreadLocal ThreadLocal is a class about creati ...

Added by dan182skater on Mon, 07 Mar 2022 09:55:10 +0200

Thread World in JAVA

Processes and ThreadsProcesses are the basic unit by which a program requests resources from the operating system, such as memory space and file handles.Threads are the smallest unit of independently executable execution in a process.JAVA Thread APICreating a thread in Java creates an instance of the Thread class.Each thread has its own task to ...

Added by dt192 on Sat, 05 Mar 2022 19:05:41 +0200

[war, interviewer] I think the salary of spring recruitment is higher than that of the interviewer. Just read this concurrent HashMap

I'm kangarooking, not my brother's brother. An Internet worm "gua" cow, sincerely share experience and technical dry goods. I hope my article is helpful to you. Pay attention to me and make a little progress every day ❗ ❗ ❗ preface This article is applicable to the following groups: The old fellow who wanted to change jobs recent ...

Added by plisken on Mon, 28 Feb 2022 02:19:54 +0200

Go concurrency control, anti breakdown - singleflight

background In high concurrency scenarios, there are often concurrent accesses to the same resource. These concurrent request parameters are the same, and the response results are the same. If each request repeatedly queries the resource, it will undoubtedly bring unnecessary overhead to the system and increase the system pressure. In order t ...

Added by system_critical on Thu, 24 Feb 2022 16:51:56 +0200

Concurrent programming 7: deep understanding of synchronized

In depth understanding of synchronized (Part 1) Thread safety problems caused by Java shared memory model public class SyncDemo { private static int count = 0; public static void increment(){ count++; } public static void decrement(){ count--; } public static void main(String[] args) throws InterruptedException { Thread t1 = new T ...

Added by highrevhosting on Thu, 24 Feb 2022 12:53:08 +0200

The art of java Concurrent Programming -- Analysis of ReentrantLock's fair lock principle

lock method analysis final void lock() { acquire(1); } The lock method calls the acquire method of AbstractQueuedSynchronizer /** * Acquires in exclusive mode, ignoring interrupts. Implemented * by invoking at least once {@link #tryAcquire}, * returning on success. Otherwise the thread is queued, possibly ...

Added by nelsok on Sat, 19 Feb 2022 12:47:28 +0200

26-4.27 multi thread learning notes

4.26-4.27 multi thread learning notes Multithreading 1. Threads are independent execution paths 2. A process contains threads, which may execute a process, and multiple threads are executing at the same time. 3. If multiple threads are opened in a process, the operation of threads is scheduled by the scheduler. The scheduler is closely ...

Added by david212 on Fri, 18 Feb 2022 22:46:09 +0200

Difference between ReentranLock and Synchronized

ReentranLock Lock interface is a built-in attribute, not built-in in java language. It can realize synchronous access ReentranLock is the implementation class of Lock interface After java SE 5, a Lock interface (and related implementation classes) is added to implement the Lock function However, it is used to acquire and release locks expl ...

Added by AtomicRax on Fri, 18 Feb 2022 18:08:16 +0200

XV Thread pool

Advantages of thread pool: As long as the work of thread pool is to control the number of running threads, put the tasks in the queue during processing, and then start these tasks after the threads are created. If the number of threads exceeds the maximum number, the threads exceeding the number will queue up and wait until other threads ar ...

Added by Lucnet on Fri, 18 Feb 2022 09:43:24 +0200