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前倾回顾
分布式任务调度平台 → XXL-JOB 初探 中,我们简单介绍了 XXL-JOB,并简单搭建了一个集群环境
可我们是在 XXL-JOB 官方的示例代码基础上来搭建的,没用应用到我们的项目中去
那如何应用到我们的项目中去了,将 xxl-job-admin、xxl-job-core、xxl-job-executor 的源码都引入到我们的项目中 ?这样可行,但没必要
我们细想下,xxl-job-admin 作为调度中心,有可视化的 web 管理界面, 可将其作为一个模块以源码的方式引入到我们的项目中,我们可对其进行自定义的修改,但一般不需要;xxl-job-core 是 XXL-JOB 的核心,绝大多数情况下我们不用对其进行自定义(一方面它已满足调度的常规需求,另一方面则是需要对 xxl-job-core 有一定的了解才敢去进行自定义的修改),那么我们以 jar 依赖的方式引入即可;至于 xxl-job-executor,它是和我们项目结合最紧密的,也是需要我们自定义的,那么我们参考官方的示例即可,不需要引入 xxl-job-executor 示例源码
具体实现我们往下看
项目搭建
项目结构如下
此时只有架子,都是空实现(包括 pom.xml),我们一步一步的填充内容
project-parent
作为父工程,可以统一配置子工程中依赖的 jar 包的版本,具体内容如下
代码语言:javascript复制<?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>
<groupId>com.lee</groupId>
<artifactId>project-parent</artifactId>
<packaging>pom</packaging>
<version>1.0-SNAPSHOT</version>
<modules>
<module>xxl-job-admin</module>
<module>my-project</module>
</modules>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<maven.compiler.encoding>UTF-8</maven.compiler.encoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<maven.test.skip>true</maven.test.skip>
<netty-all.version>4.1.50.Final</netty-all.version>
<gson.version>2.8.6</gson.version>
<spring.version>5.2.7.RELEASE</spring.version>
<spring-boot.version>2.3.0.RELEASE</spring-boot.version>
<mybatis-spring-boot-starter.version>2.1.3</mybatis-spring-boot-starter.version>
<mysql-connector-java.version>8.0.20</mysql-connector-java.version>
<slf4j-api.version>1.7.30</slf4j-api.version>
<junit.version>4.13</junit.version>
<javax.annotation-api.version>1.3.2</javax.annotation-api.version>
<groovy.version>3.0.4</groovy.version>
<!-- xxl-job-core 作为依赖引入 -->
<xxl-job-core-version>2.2.0</xxl-job-core-version>
<lombok.version>1.16.22</lombok.version>
<maven-source-plugin.version>3.2.1</maven-source-plugin.version>
<maven-javadoc-plugin.version>3.2.0</maven-javadoc-plugin.version>
<maven-gpg-plugin.version>1.6</maven-gpg-plugin.version>
<maven-war-plugin.version>3.3.0</maven-war-plugin.version>
</properties>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>${mybatis-spring-boot-starter.version}</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql-connector-java.version}</version>
</dependency>
<dependency>
<groupId>com.xuxueli</groupId>
<artifactId>xxl-job-core</artifactId>
<version>${xxl-job-core-version}</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
</dependency>
</dependencies>
</dependencyManagement>
</project>
xxl-job-admin
这个好处理,将官方示例源代码中的 xxl-job-admin 的 src 文件夹直接拷贝过来覆盖已有的 src,pom.xml 添加如下内容
代码语言:javascript复制<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>com.lee</groupId>
<artifactId>project-parent</artifactId>
<version>1.0-SNAPSHOT</version>
</parent>
<artifactId>xxl-job-admin</artifactId>
<packaging>jar</packaging>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>${spring-boot.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<!-- starter-web:spring-webmvc autoconfigure logback yaml tomcat -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- starter-test:junit spring-test mockito -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!-- freemarker-starter -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-freemarker</artifactId>
</dependency>
<!-- mail-starter -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-mail</artifactId>
</dependency>
<!-- starter-actuator -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<!-- mybatis-starter:mybatis mybatis-spring hikari(default) -->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
</dependency>
<!-- mysql -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<!-- xxl-job-core -->
<dependency>
<groupId>com.xuxueli</groupId>
<artifactId>xxl-job-core</artifactId>
</dependency>
</dependencies>
</project>
然后修改:application.properties 中的配置,例如端口号,数据库连接地址、用户名、密码等等,改好之后我们启动下,就知道 xxl-job-admin 是否搭建好了
启动没报错,我们访问下:http://localhost:8080/xxl-job-admin,出现如下登录界面,则表示 xxl-job-admin 搭建完成
my-project
这个就是我们的项目工程,调度以外的代码该怎么写还是怎么写,下面我们只讲调度相关的
实际项目中,任务调度往往会操作数据库,我们加入相关依赖,pom.xml 如下:
代码语言:javascript复制<?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">
<parent>
<artifactId>project-parent</artifactId>
<groupId>com.lee</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>my-project</artifactId>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>${spring-boot.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
</dependency>
<!-- mysql -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<!-- xxl-job-core -->
<dependency>
<groupId>com.xuxueli</groupId>
<artifactId>xxl-job-core</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</dependency>
</dependencies>
</project>
配置 application.properties
代码语言:javascript复制### web
server.port=8081
server.servlet.context-path=/my-project
### mybatis
mybatis.mapper-locations=classpath:/mybatis-mapper/*Mapper.xml
#mybatis.type-aliases-package=com.xxl.job.admin.core.model
### xxl-job, datasource
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/my_project?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true&serverTimezone=Asia/Shanghai
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
### datasource-pool
spring.datasource.type=com.zaxxer.hikari.HikariDataSource
spring.datasource.hikari.minimum-idle=10
spring.datasource.hikari.maximum-pool-size=30
spring.datasource.hikari.auto-commit=true
spring.datasource.hikari.idle-timeout=30000
spring.datasource.hikari.pool-name=HikariCP
spring.datasource.hikari.max-lifetime=900000
spring.datasource.hikari.connection-timeout=10000
spring.datasource.hikari.connection-test-query=SELECT 1
# log config
logging.config=classpath:logback.xml
### xxl-job admin address list, such as "http://address" or "http://address01,http://address02"
xxl.job.admin.addresses=http://127.0.0.1:8080/xxl-job-admin
### xxl-job, access token
xxl.job.accessToken=
### xxl-job executor appname
xxl.job.executor.appname=my-project-executor
### xxl-job executor registry-address: default use address to registry , otherwise use ip:port if address is null
xxl.job.executor.address=
### xxl-job executor server-info
xxl.job.executor.ip=
xxl.job.executor.port=9999
### xxl-job executor log-path
xxl.job.executor.logpath=/data/applogs/xxl-job/jobhandler
### xxl-job executor log-retention-days
xxl.job.executor.logretentiondays=30
新增 Job 执行器:XxlJobConfig.java
代码语言:javascript复制package com.lee.config;
import com.xxl.job.core.executor.impl.XxlJobSpringExecutor;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class XxlJobConfig {
private Logger logger = LoggerFactory.getLogger(com.lee.config.XxlJobConfig.class);
@Value("${xxl.job.admin.addresses}")
private String adminAddresses;
@Value("${xxl.job.accessToken}")
private String accessToken;
@Value("${xxl.job.executor.appname}")
private String appname;
@Value("${xxl.job.executor.address}")
private String address;
@Value("${xxl.job.executor.ip}")
private String ip;
@Value("${xxl.job.executor.port}")
private int port;
@Value("${xxl.job.executor.logpath}")
private String logPath;
@Value("${xxl.job.executor.logretentiondays}")
private int logRetentionDays;
@Bean
public XxlJobSpringExecutor xxlJobExecutor() {
logger.info(">>>>>>>>>>> xxl-job config init.");
XxlJobSpringExecutor xxlJobSpringExecutor = new XxlJobSpringExecutor();
xxlJobSpringExecutor.setAdminAddresses(adminAddresses);
xxlJobSpringExecutor.setAppname(appname);
xxlJobSpringExecutor.setAddress(address);
xxlJobSpringExecutor.setIp(ip);
xxlJobSpringExecutor.setPort(port);
xxlJobSpringExecutor.setAccessToken(accessToken);
xxlJobSpringExecutor.setLogPath(logPath);
xxlJobSpringExecutor.setLogRetentionDays(logRetentionDays);
return xxlJobSpringExecutor;
}
/**
* 针对多网卡、容器内部署等情况,可借助 "spring-cloud-commons" 提供的 "InetUtils" 组件灵活定制注册IP;
*
* 1、引入依赖:
* <dependency>
* <groupId>org.springframework.cloud</groupId>
* <artifactId>spring-cloud-commons</artifactId>
* <version>${version}</version>
* </dependency>
*
* 2、配置文件,或者容器启动变量
* spring.cloud.inetutils.preferred-networks: 'xxx.xxx.xxx.'
*
* 3、获取IP
* String ip_ = inetUtils.findFirstNonLoopbackHostInfo().getIpAddress();
*/
}
新增 Job:UserJob.java
代码语言:javascript复制package com.lee.job;
import com.lee.model.User;
import com.lee.service.UserService;
import com.xxl.job.core.biz.model.ReturnT;
import com.xxl.job.core.handler.annotation.XxlJob;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import java.util.List;
@Component
public class UserJob {
@Autowired
private UserService userService;
@XxlJob("userJobHandler")
public ReturnT<String> userJobHandler(String param) throws Exception {
System.out.println("hello, user...");
// 查询数据库,业务处理后再写回数据库
List<User> users = userService.listAll();
System.out.println(users);
return ReturnT.SUCCESS;
}
}
项目工程完整代码:my-xxl-job
调度配置
启动 xxl-job-admin、my-project 后,在调度中心配置执行器
配置任务
具体配置过程、调度启动、集群搭建可查看 分布式任务调度平台 → XXL-JOB 初探
总结
1、xxl-job-admin 基本按源码引入就好,基本不需要改动
2、xxl-job-core 被 xxl-job-admin 和 xxl-job-executor 依赖,我们以 jar 包的方式依赖进来就好,无需引入源码
3、xxl-job-executor 的改造其实也简单,加入相应的配置,将我们常规的定时任务改成 xxl-job 的方式就好
4、可能存在一些细节未讲到,如果有不理解的地方,多看看 my-xxl-job 源码就好