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First of all, a question is raised. Why do we separate the jar package? The reason is very simple. The jar files that we use the spring boot maven plugin plug-in to package are usually large, or tens of meters less. If the external network transmission of the upload cloud server is slow, why the files will be large after packaging? This is bec ...

Spring Boot integrates RabbitMQ Spring Boot is very easy to integrate RabbitMQ. It only needs two steps. First, add RabbitMQ dependency in pom.xml. org.springframework.boot spring-boot-starter-amqp The second step is to configure the information in src/main/resources/application.properties. #rabbitmq spring.rabbitmq.host=local ...

A DispatchServlet: front end controller II Controller: Controller Three HandlerAdapter: a class used internally by DispatchServlet Its relationship with DispatchServlet is shown in the following source code: public class DispatcherServlet extends FrameworkServlet { ... private void initHandlerAdapters(Applicatio ...

redis is turned off by default. It is not recommended to turn it on. This paper provides a reference. Key space notification is usually not enabled because of the additional cost of this process. 1. Enable redis configuration # # notify-keyspace-events Ex # # By default all notifications are disabled because most users don't need # th ...

When creating a spring + spring MVC + mybatis project, you first need to configure some corresponding configuration files. Here is a brief introduction of the simplest requirements for these configuration files. 1  Mybatis.xml <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xml ...

Generic JpaRepository class import org.springframework.data.jpa.repository.JpaRepository; import org.springframework.stereotype.Repository; @Repository public interface EmployeeRepository extends JpaRepository<Employee,Long>{ } General filter queries of JpaRepository can be solved in the form of findBy, which is easy to use in general, ...

By default, the plug-in spring boot Maven plugin packages the whole project into a Jar package that can run (the so-called Flat Jar), resulting in a large Jar package (usually dozens of M +). Nowadays, there are many things in iterative publishing. It will waste a lot of time to upload such a huge file every time, and sometimes there will be er ...

The autowire parameter of the < bean > node in the spring configuration file can control how beans are automatically assembled Default - the default is the same as "no" no - does not auto assemble, requires < ref / > nodes or parameters byName - assemble by name byType - assemble by type Constructor - assemble ac ...

Job schedule completes a lot of quartz related content, and also registers the service information to zk, and completes the cache of related job information. In the whole task scheduling, the job schedule completes the elastic job backbone process. <a name="dI1yS"></a> JobSchedule When the elastic job is started, it needs to registe ...

When we call an interface, we may fail for network reasons and try again successfully. This is the retry mechanism.Be careful to use retries when they are not idempotent. tips: idempotency Idempotency is defined in HTTP/1.1 as requesting a resource once or more should have the same result for the resource itself (except for problems such as net ...