Programming VIP

Synchronized & volatile of concurrent programming concept Locks are often mentioned in concurrent programming. Adding locks ensures the data security of multiple threads. Each object in java can be used as a lock. There are three specific manifestations: For common synchronization methods, the lock is the current instance object; F ...

Wedge In the previous article, we introduced synchronized and learned that synchronized can solve the atomicity problem of some data. In this article, we continue to learn the knowledge of CAS non locking with AtomicInteger as the starting point. Using synchronized to solve the atomicity of i + + Use the synchronized keyword to ensure data a ...

In the previous chapter, we analyzed the creation and initialization of NioServerSocketChaennl in Netty. In this chapter, we will continue to analyze the analysis of NioServerSocketChannel. NioServerSocketChannel is a channel object officially encapsulated by Netty, which is intended to replace or package the native SocketChannel object of JDK, ...

concept The full name of CAS is Compare And Swap, which means compare and exchange. It is the atomic operation of CPUCAS is an abstract idea, not a concrete implementationCAS operation has three parameters: memory address of the value to be modified, expected value and new valueThe main idea is to judge whether the value of a location in memor ...

Catalog 1. Three devices for high concurrency systems 2. Current Limiting Algorithms 2.1 Fixed Window algorithm 2.2 Sliding Window algorithm 2.3 Leaky Bucket algorithm 2.4 Token Bucket algorithm Comparison of 2.5 Leakage Bucket and Token Bucket Algorithms 3. Scenarios for application of current-limiting algorithms 3.1 Google Guava 3 ...

causeThe project needs to do an upload function, which uploads 20 videos at a time. There will be a blocking problem if it is not transmitted directly.Because a web page can only have 6 tcp connections with the same domain name at most. If you do not control the concurrent transmission of 6 interfaces at the same time, all subsequent operations ...

Exclusive lock ReentrantLock principleintroduceReentrantLock is a reentrant exclusive lock. At the same time, only one thread can acquire the lock. Other threads acquiring the lock will be blocked and put into the AQS blocking queue of the lock.It has the same basic behavior and semantics as synchronized, but ReentrantLock is more flexible and ...

1. Opening remarks When it comes to concurrent programming, the first impression in your mind may be Thread, multithreading, JUC, Thread pool, ThreadLocal and so on. Indeed, concurrent programming is an indispensable part of Java programming. Mastering the core technology of concurrent programming will be a sharp weapon in job interviews. Toda ...

This article refers to your Batman, the author of CSDN Usage and principle of ForkJoinPool thread pool He Zhihu author Readily Articles Use and precautions of Fork/Join framework with high concurrency. ForkJoinPool is mainly used to implement the divide and conquer algorithm, especially the recursive functions called after divide and conque ...

Chapter 9 concurrency based on shared variables In the previous chapter, we used direct and natural methods such as goroutine and channel to implement concurrency. Sometimes they have some problems In this chapter, we will introduce the concurrency mechanism in more detail, especially the sharing of variables between goroutines. We will also ...