First come, first served! Alitao Department of Internal Biography 322 pages of Java concurrent programming core handout learning notes

The process of mastering concurrent programming is not easy. To solve this problem, I’m sure you’ve heard someone summarize the first principle of concurrent programming, which is don’t write concurrent programs. This principle worked a few years ago, when multi-core servers were a luxury and concurrency was low. With databases and middleware like Tomcat, we didn’t have to write concurrent programs at all. In other words, concurrency problems are mostly solved by middleware and databases.

But in recent years, concurrent programming has slowly become a necessary skill.

This is mainly due to the hardware drive and the rapid development of the domestic Internet industry. Now 64-core servers have been flown into ordinary homes, and the system concurrency of large Internet manufacturers is easily over one million. The traditional middleware and database can no longer protect us from the wind and rain, but become the bottleneck.

In order to let the fans can better hand concurrent programming, Internet Little Helper (LZ I) from a friend of Ali some time ago to get its internal strong concurrent programming learning notes, need a full version of the PDF friend text at the end of the free download way!

Why learn concurrent programming?

First come, first served! Alitao Department of Internal Biography 322 pages of Java concurrent programming core handout learning notes

How to learn concurrent programming well?

First come, first served! Alitao Department of Internal Biography 322 pages of Java concurrent programming core handout learning notes

First, the theoretical basis of concurrency

Visibility, atomicity, and orderliness issues: the source of concurrent programming bugs

The Java Memory Model: How does Java solve the problem of visibility and ordering

Mutex (I) : Solves the atomicity problem

Mutex (2) : How to protect multiple resources with a lock?

What should I do if I accidentally deadlock it?

Optimize cyclic waiting with a wait-notification mechanism

Safety, activity, and performance issues

Management: the master key to concurrent programming

Java threads (top) : The lifecycle of a Java thread

Java Threads (middle) : How many threads are appropriate to create?

Java Threading (Part 2) : Why are local variables thread-safe?

How to write concurrent program with object – oriented idea?

Answering hot questions in the theoretical basis module

First come, first served! Alitao Department of Internal Biography 322 pages of Java concurrent programming core handout learning notes

First come, first served! Alitao Department of Internal Biography 322 pages of Java concurrent programming core handout learning notes

First come, first served! Alitao Department of Internal Biography 322 pages of Java concurrent programming core handout learning notes

First come, first served! Alitao Department of Internal Biography 322 pages of Java concurrent programming core handout learning notes

Second: Concurrency utility classes

Lock and Condition (top) : The pipe procedure hidden and distributed

Lock and Condition (below) : How does Dubbo use pipe procedures to achieve asynchronous to synchronous?

Semaphore: How to implement a current limiter quickly?

ReadWriteLock: How to quickly implement a complete cache?

StampedLock: Is there a faster lock than a read-write lock?

CountDownlatch and CyclicBarrier: How do you keep multiple threads in sync?

Concurrent Containers: What are the “pits” we need to fill in?

The atomic class: A classic example of a lockless utility class

Executor and thread pools: How do I create the right thread pool?

Future: How to use multi-thread to achieve the optimal “boiling water to make tea” program?

CompletableFuture: Asynchronous programming is not that hard

CompletionService: How to batch execute asynchronous tasks?

Fork/Join: stand-alone version of MapReduce

Concurrency tool class module hot question answering

First come, first served! Alitao Department of Internal Biography 322 pages of Java concurrent programming core handout learning notes

First come, first served! Alitao Department of Internal Biography 322 pages of Java concurrent programming core handout learning notes

First come, first served! Alitao Department of Internal Biography 322 pages of Java concurrent programming core handout learning notes

First come, first served! Alitao Department of Internal Biography 322 pages of Java concurrent programming core handout learning notes

First come, first served! Alitao Department of Internal Biography 322 pages of Java concurrent programming core handout learning notes

Third: Concurrent design patterns

The Immutability pattern: How can you use Immutability to solve concurrency problems

Copy-on-write mode: CoW that is not a delay policy

Thread local storage: no sharing, no harm

Guarded Suspension mode: The system of waiting for the system to be implemented

Balking pattern: Again, the thread-safe singleton pattern

Thread-per-message pattern: The simplest and most practical method of division of labor

Worker Thread mode: How do I avoid creating threads repeatedly?

Two-phase termination: How do you gracefully terminate a thread?

Producer – consumer model: use assembly line thinking to improve efficiency

Answer hot questions of design pattern module

First come, first served! Alitao Department of Internal Biography 322 pages of Java concurrent programming core handout learning notes

First come, first served! Alitao Department of Internal Biography 322 pages of Java concurrent programming core handout learning notes

First come, first served! Alitao Department of Internal Biography 322 pages of Java concurrent programming core handout learning notes

Four high performance case studies

Case study (1) : high performance current limiter Guava RateLimiter

Case study (2) : high performance network application framework Netty

Case Study III: High Performance Queue Disruptor

Case study (4) : High performance database connection pool Hikaricp

First come, first served! Alitao Department of Internal Biography 322 pages of Java concurrent programming core handout learning notes

First come, first served! Alitao Department of Internal Biography 322 pages of Java concurrent programming core handout learning notes

First come, first served! Alitao Department of Internal Biography 322 pages of Java concurrent programming core handout learning notes

First come, first served! Alitao Department of Internal Biography 322 pages of Java concurrent programming core handout learning notes

The last

Many people say that learning is against human nature. It’s easy to start, but hard to stick to it for long. I agree with this. When I interview, I often ask candidates a question: “Is there one thing that you have been doing for a long time that you have benefited from?” If the candidate can answer it, it will be a plus for the whole interview, because I think persistence is really a valuable quality. Some people are enthusiastic about one thing, while some people can do it for a year or more. When you look at it over time, there’s an exponential difference between the two types of people.