This high-concurrency manual first explains the basic principles of high-concurrency IO from the basic principles of the operating system, and introduces how to make a single Java application support millions of high-concurrency. Then, it focuses on Netty. , Give a detailed introduction to ZooKeeper, and finally, introduce a high-concurrency IM system model with billions of traffic through the CrazyIM project.
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Analyze the underlying principles of high concurrency IO + how to make a single Java application support millions of high concurrency?
First, start from the underlying principles of the operating system to explain the underlying principles of high-concurrency IO in a simple and understandable way, and introduce how to make a single Java application support millions of high-concurrency; starting from the traditional blocking OIO, a detailed analysis of Reactor The high-performance mode introduces the basic knowledge of high-performance network development; starting from Java's thread Join and thread pool, it introduces two commonly used asynchronous callback technologies, Java Future and Guava ListenableFuture. The basic knowledge of these principles is very important and is the golden key to solving practical problems when you develop Java background applications daily.
Chapter 1 Essential Skills for High Concurrency Era
Chapter 2 The underlying principle of high concurrent IO
Chapter 3 Detailed Explanation of Java NIO Communication Basics
Chapter 4 The Famous Reactor Model
Chapter 5 Future Asynchronous Callback Mode in Concurrency Fundamentals
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Netty articles
Next, focus on Netty. This is the crown jewel of the well-deserved high-performance communication framework, and it is the framework that supports many other well-known high-concurrency, distributed, and big data frameworks. There are two major features here: one is to start with the Reactor mode and learn the principles of Netty in a four or two way; the other is to use Netty to solve key problems in network programming, such as ProtoBuf serialization problems, half-packet problems, etc.
Chapter 6 Netty Principles and Basics
Chapter 7 Decoder and Encoder important components
Chapter 8 JSON and ProtoBuf serialization
Chapter 9 Development and Practice of a Single IM System Based on Netty
ZooKeeper articles
Then, a detailed introduction to ZooKeeper. In addition to a comprehensive introduction to using the Curator API to operate ZooKeeper, it also introduces how to use ZooKeeper to design a distributed ID generator from a practical perspective, and gives a detailed introduction to the important SnowFlake algorithm. In addition, it also introduces the basic principles of distributed locks in an easy-to-understand manner through pictures and texts combined with short stories, and completes a small practical case of ZooKeeper distributed locks.
Chapter 10 ZooKeeper Distributed Coordination
Redis articles
Next, from the practical development level, Redis is explained, and the five data types, client operation instructions, and Jedis Java API of Redis are introduced in detail. In addition, spring-data-redis is also used to complete two ways of data distributed caching, and a detailed introduction to Spring's cache annotations and the SpEL expression language involved.
Chapter 11 Distributed Cache Redis
Highly concurrent IM system model
Finally, the CrazyIM project introduces a high-concurrency IM system model with billions of traffic. The system model of this high-concurrency architecture is not only limited to the IM system, but can be applied to the current mainstream Java back-end systems through simple adjustments and adaptations.
Chapter 12 Development Practice of 100 Million-level Gaojingfa M Architecture
to sum up
This manual summarized by Alipay Daniel focuses on practical skills and analyzes the underlying principles. Interpret the core problems in high-concurrency development, architecture, and interviews! It is a very rare manual for theory + actual combat!
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