Here is a list of points of knowledge I prepared for myself to learn or to review in order to be an advanced Java backend developer.

Java Fundamentals

• Collection, java.util.concurrent, IO/NIO, reflection

NIO: overview of netty; review the source of netty

• Dynamic proxy, CGLIB

How to generate proxy class

• JVM, JMM (JVM Memory Model)

Mechanism of garbage collection (CMS GC + G1 GC)
JMM: refer to java language specification
JVM optimization: parameter optimization
ConcurrentHashMap, CopyOnWrite, Thread pool, CAS, AQS

Commonly used Frameworks

• Spring
  • IOC/AOP (design patterns): just skip through its source code
  • Source code level
• MyBatis
  • Source code level

Database

• MySQL
  • common practice of parameter settings
  • how to choose storage engine
  • how to choose index engine
  • table design
  • SQL optimization
• Redis
  • internals
  • common practice of parameter settings

Web

• HTTP Protocol: wikipedia
• SOA: wikipedia
• Caching
  • Guava cache
  • memcached
  • redis
• Serialization (Google protocol buffer)
• RPC
  • dubbo
• JMS
  • internals

Basics

• Algorithm & Data structure
  • <= Red-black tree
  • IOC/AOP
  • Design pattern (~ 15) ~> Wikipedia

Software Engineering and Management

High-Quality Software Engineering

References

• Watchmen
• Collections of Java interview questions
• MyBatis Caching
  • link_1
  • link_2
  • link_3