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I. What is SPISPI, called Service Provider Interface, is a service discovery mechanism. It automatically loads the classes defined in the file by looking up the file in the META-INF/services folder under the ClassPath path. This mechanism provides the possibility for many framework extensions, such as the use of SPI mechanism in Dubbo and JDBC. ...

problem A strange problem with a project recently is that the database often reports that the connection is closed every few hours. Even with the following configuration, it is still not possible, and there is no article on the Internet explaining the pit. test-on-borrow: true test-while-idle: true validation-query: select 1 from dual Trou ...

1.flume configuration Create a file that flume listens to instead of a kafka producer to transfer content to consumers. The configuration is as follows ###############to sinnsource,channel give a name###############a kafka_agent.sources = kafka_source kafka_agent.sinks = kafka_sink kafka_agent.channels = kafka_channel ##############To ...

Implementation of Spring Boot MyBatis Database Cluster Access This example mainly introduces Spring Boot program to realize database cluster access and load balancing by reading and polling. Before reading this example, I suggest that you have The ...

org.quartz implements timed tasks and customizes task data source switching Timing tasks are often used to deal with periodic tasks. org.quartz is an excellent framework for dealing with such tasks. As the project progresses little by little, we are not satisfied that the task is only carried out on time. We also want to have more control over ...

In the last article< SpringBook Advanced Tutorial (60) Build multiple modules under the intellij idea project (Part 1) > In this article, we have introduced how to divide multiple modules after creating a project in intellij idea, and today we will give you a brief overview of the breakdown of the detailed work among the modules. If y ...

Original Link: https://www.jianshu.com/p/3a3edbcd8f24 1. What is SPI SPI, fully known as Service Provider Interface, is a service discovery mechanism.It automatically loads the classes defined in the file by looking for the file in the ...

1. Sharing-Jdbc Concept and Use Skills This commentary version is 4.0.0-RC1, and the latest version is released on May 21, 2019. 1.1. Binding table Refers to the main table and subtable with consistent fragmentation rules. For example, the t_order table and the t_order_item table are all sliced according to order_id, and the two tables are m ...

1. Introduction to Mybatis Mybatis is an excellent persistence framework, which encapsulates the process of jdbc operating database, so that we only need to pay attention to the SQL itself in the development process, and do not need to spend a lot of energy to deal with the complicated jdbc such as registration driver, connection creation, sta ...

Introduction of JAP Framework JPA(Java Persistence API), which means Java persistence API, is the Java persistence specification proposed by Sun after JDK 5.0. The main purpose is to simplify the development of persistence layer and integrate ORM technology, to end the situation of Hibernate, TopLink, JDO and other ORM frameworks operating inde ...