Programmer Think

Zhao Huabing, senior engineer of Tencent cloud, Istio Member, management member of ServiceMesher, contributor of Istio project, is keen on open source, network and cloud computing. At present, it is mainly engaged in open source and R & D of service grid. introduction TCM (Tencent Cloud Mesh) is a Service Mesh hosting service based on Ist ...

1.Spring Configuration Data Source 1.1 Role of data sources (connection pools) Data sources (connection pools) are available to improve program performance Pre-instantiate the data source to initialize partial connection resources Get from data source when using connection resources Return the connected resource to the data source after us ...

Chapter 1 Introduction to spring MVC Spring Framework version 4.3.29 RELEASE What is spring MVC 1. Spring Part of the family 2. yes JavaWeb Solution of controller layer in three-tier architecture 3. Is based on MVC Ideological framework -- Model -- View -- Controller Spring MVC knowledge point outline Spring MVC ...

1, Basic concepts of transaction 1. What is a transaction (1) Transaction is the most basic unit of database operation. Logically, a group of operations either succeed or fail if one fails (2) Typical scenario: bank transfer 2. Transactions have four characteristics (ACID) (1) Atomicity: to succeed, to fail, to fail (2) Consistency: the total a ...

HelloSpring 1. Create spring-02-hellospring 2. Add Hello entity class public class Hello { private String str; public String getStr() { return str; } public void setStr(String str) { this.str = str; } @Override public String toString() { return "Hello{" + "str='" + str + ...

SpringBoot-21-Mybatis multiple data sources As we mentioned earlier, there are two ways to generate Mybatis Code: Mybatis Genenrator Mybatis code generation Mybtais Plus MyBatisPlus code generation The JdbcTemplate and spring boot data operation databases were also introduced earlier JdbcTemplate multi data source configuration Spring ...

Define spring beans Bean definition in the corresponding code is the configuration meta information interface of beans defined in the Spring Framework, mainly including: Bean's class name, fully qualified name, concrete implementation classBean configuration meta information: scope, Auto Wiring, lifecycle callbackBean References: Collaborator ...

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Ideas of this paper How to implement dynamic proxy in jdk, cglib and spring. spring implements ProxyFactory details of dynamic agents. Understand the general idea of AOP implementation from the use of ProxyFactory. What is an agent Provide a proxy for other objects to control access to this object, enhance a method in a class, and extend the ...

preface 1, synchronized and Volatile volatile Visibility can be guaranteed, but atomicity cannot be guaranteed (thread safety problem) Prohibit reordering synchronized Both visibility and atomicity can be guaranteed Reordering is not prohibited synchronized is blocking. Only one thread can access it at a time 2, Reorder Concept: the c ...