HikariCP and AlibabaDruid connection pool brief introduction-Spring introduction study notes 03

The content of the course comes from the geek time playing Spring Family Bucket, the link is as follows
https://time.geekbang.org/course/intro/100023501

Third day

Part1HikariCP

Light (ひかり) comes from Japanese, as the name suggests, it means that the connection pool is very fast
https://github.com/brettwooldridge/HikariCP
The concept is roughly derived from: various optimizations (optimizations in bytecode and many small improvements) in various places, the
HikariCP data source connection pool is used by default in the SpringBoot 2.X version.
Common configurations are as follows

spring.datasource.hikari.maximumPoolSize =10
spring.datasource.hikari.minimumldle=10
spring.datasource.hikari.idleTimeout=600000
spring.datasource.hikari.connectionTimeout=30000
spring.datasource.hikari.maxLifetime=1800000

Part2AlibabaDruid

Alibaba open source connection pool, the biggest feature is that the monitoring feature does not affect performance
https://github.com/alibaba/druid



Via druid-spring-boot-starter

Start the program in the demo, the program rewrites the connection_connectBefore and connection_connectAfter methods, inherits the FilterEventAdapter class, and outputs the log when the method is executed

. The connection pool of the program is configured in application.properties, so the log

code will be output after each connection before the connection. as follows:

package geektime.spring.data.druiddemo;

import com.alibaba.druid.filter.FilterChain;
import com.alibaba.druid.filter.FilterEventAdapter;
import com.alibaba.druid.proxy.jdbc.ConnectionProxy;
import lombok.extern.slf4j.Slf4j;

import java.util.Properties;

@Slf4j
public class ConnectionLogFilter extends FilterEventAdapter {
    
    

    @Override
    public void connection_connectBefore(FilterChain chain, Properties info) {
    
    
        log.info("BEFORE CONNECTION!");
    }

    @Override
    public void connection_connectAfter(ConnectionProxy connection) {
    
    
        log.info("AFTER CONNECTION!");
    }
}

package geektime.spring.data.druiddemo;

import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.jdbc.core.JdbcTemplate;

import javax.sql.DataSource;

@SpringBootApplication
@Slf4j
public class DruidDemoApplication implements CommandLineRunner {
    
    
	@Autowired
	private DataSource dataSource;
	@Autowired
	private JdbcTemplate jdbcTemplate;

	public static void main(String[] args) {
    
    
		SpringApplication.run(DruidDemoApplication.class, args);
	}

	@Override
	public void run(String... args) throws Exception {
    
    
		log.info(dataSource.toString());
	}
}

Pay special attention to the use of AlibabaDruid. HikariCP that spring-boot-starter-jdbc depends on should be excluded from

pom.xml in pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.1.1.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<groupId>geektime.spring.data</groupId>
	<artifactId>druid-demo</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>druid-demo</name>
	<description>Demo project for Spring Boot</description>

	<properties>
		<java.version>1.8</java.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-actuator</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-jdbc</artifactId>
			<exclusions>
				<exclusion>
					<artifactId>HikariCP</artifactId>
					<groupId>com.zaxxer</groupId>
				</exclusion>
			</exclusions>
		</dependency>
		<dependency>
			<groupId>org.projectlombok</groupId>
			<artifactId>lombok</artifactId>
		</dependency>

		<dependency>
			<groupId>com.h2database</groupId>
			<artifactId>h2</artifactId>
			<scope>runtime</scope>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>

		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>druid-spring-boot-starter</artifactId>
			<version>1.1.10</version>
		</dependency>
	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>

</project>

application.properties

spring.output.ansi.enabled=ALWAYS

spring.datasource.url=jdbc:h2:mem:foo
spring.datasource.username=sa
spring.datasource.password=n/z7PyA5cvcXvs8px8FVmBVpaRyNsvJb3X7YfS38DJrIg25EbZaZGvH4aHcnc97Om0islpCAPc3MqsGvsrxVJw==

spring.datasource.druid.initial-size=5
spring.datasource.druid.max-active=5
spring.datasource.druid.min-idle=5
spring.datasource.druid.filters=conn,config,stat,slf4j

spring.datasource.druid.connection-properties=config.decrypt=true;config.decrypt.key=${public-key}
spring.datasource.druid.filter.config.enabled=true

spring.datasource.druid.test-on-borrow=true
spring.datasource.druid.test-on-return=true
spring.datasource.druid.test-while-idle=true

public-key=MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBALS8ng1XvgHrdOgm4pxrnUdt3sXtu/E8My9KzX8sXlz+mXRZQCop7NVQLne25pXHtZoDYuMh3bzoGj6v5HvvAQ8CAwEAAQ==