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PS: This article is detailed, so it is long. Reading time: 30m~1h. Please read it carefully. I hope you can have a clear understanding of unified exception handling in an hour. 1. Background In the process of software development, it is inevitable to deal with all kinds of exceptions. For myself, at least more than half of the time is dealing ...

1. Problem Description: Concurrent lrucache is used as the JVM cache pool object public class UserManager { private ConcurrentLruCache<UserCacheKey, UserInfo> cache = new ConcurrentLruCache<UserCacheKey, UserInfo>(100, new Function<UserCacheKey, UserInfo>() { @Override public UserInfo apply(UserCacheK ...

2. What is Feign? Feign is also a hard role, and it is designed to make Java Http clients easier. Feign integrates Ribbon and RestTemplate to make load balancing Http calls, but encapsulates the original way (Ribbon+RestTemplate). Instead of manually using RestTemplate to invoke services, developers define an interface in which service call ...

In springBoot, we don't need to do any configuration to write directly at the business level Code, because springBoot Help US configure all the environments. Here's a simple springboot Project Analysis Project Code springBoot main program ```java @SpringBootApplication public class HelloApplication { public static void main(String[] arg ...

tag: java diagnostic stack online debugging time-consuming deadlock arthas Alibaba Arthas Arthas is an open source Java diagnostic tool of Alibaba, which is deeply loved by developers. Official website documents: https://arthas.aliyun.com/doc/ When you encounter the following similar problems and are helpless, Arthas can help you solve them: ...

Spring AOP 1. What is AOP? In the software industry, AOP is the abbreviation of Aspect Oriented Programming, which means: Aspect Oriented Programming, a technology to realize the unified maintenance of program functions through precompiled mode and dynamic agent during operation. AOP is the continuation of OOP, a hot spot in software developm ...

preface In the previous chapter, I took you to build the CAS Server side project, that is, we built a unified single sign on authentication center. Next, we can build the CAS client project, and then realize the interactive authentication between the client and the server, so as to complete single sign on. Next, you will follow brother Yige t ...

@TOC #Spring collection Record every step of the program___ auth:huf Yesterday, careful students have found a problem; In Spring 5.X or SpringBoot 2.x, the CGLIB interface is used regardless of whether the class implements the interface In Spring 5.X, Spring uses the CGLIB interface by default. In Spring 4, the JDK proxy is used, but after 5. ...

SpringCloud Config configuration center summary What is it? SpringCloud Config provides centralized external configuration support for microservices in the microservice architecture. The configuration server provides a centralized external configuration for all environments of different microservice applications. How do you play? Spring c ...

1, Jingdong interview questions 1. Implementation principle of @ Autowired 1. Injection method:         1. Constructor based dependency injection public class UserServiceImpl implents UserService{ private UserDao userDao; @Autowire public UserServiceImpl(UserDao userDao){ this.userDao = ...