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XXL-Job学习笔记(一)

XXL-Job学习笔记(一)

作者: Jayden梅 | 来源:发表于2018-11-06 22:01 被阅读283次

    1 概述

    XXL-JOB是一个轻量级分布式任务调度平台,其核心设计目标是开发迅速、学习简单、轻量级、易扩展。

    1.1 下载

    源码仓库地址

    源码仓库地址
    https://github.com/xuxueli/xxl-job
    http://gitee.com/xuxueli0323/xxl-job

    maven依赖

            <dependency>
                <groupId>com.xuxueli</groupId>
                <artifactId>xxl-job-core</artifactId>
                <version>1.9.2</version>
            </dependency>
    

    1.2 环境

    • JDK:1.7+
    • Servlet/JSP Spec:3.1/2.3
    • Tomcat:8.5.x/Jetty9.2.x
    • Spring-boot:1.5.x/Spring4.x
    • Mysql:5.6+
    • Maven:3+

    2 使用

    2.1 安装

    下载XXL-Job 源码
    https://github.com/xuxueli/xxl-job 克隆项目至本地

    初始化数据库

    初始化项目数据库至本地数据库,SQL脚本位置如下:

    /xxl-job/doc/db/tables_xxl_job.sql
    

    部署调度中心

    打开下载的源码编译,配置调度中心

    调度中心配置文件地址:

    /xxl-job/xxl-job-admin/src/main/resources/xxl-job-admin.properties
    

    配置信息详解:

    ### 调度中心JDBC链接:链接地址请保持和 2.1章节 所创建的调度数据库的地址一致
    xxl.job.db.driverClass=com.mysql.jdbc.Driver
    xxl.job.db.url=jdbc:mysql://localhost:3306/xxl-job?useUnicode=true&characterEncoding=UTF-8
    xxl.job.db.user=root
    xxl.job.db.password=root_pwd
    
    ### 报警邮箱
    xxl.job.mail.host=smtp.163.com
    xxl.job.mail.port=25
    xxl.job.mail.ssl=false
    xxl.job.mail.username=ovono802302@163.com
    xxl.job.mail.password=asdfzxcv
    xxl.job.mail.sendFrom=ovono802302@163.com
    xxl.job.mail.sendNick=《任务调度平台XXL-JOB》
    
    ### 登录账号
    xxl.job.login.username=admin
    xxl.job.login.password=123456
    
    ### 调度中心通讯TOKEN,非空时启用
    xxl.job.accessToken=
    
    ### 调度中心国际化设置,默认为中文版本,值设置为“en”时切换为英文版本
    xxl.job.i18n=
    

    运行项目

    运行源码中的xxl-job-admin项目,通过tomcat启动

    2.2 编写分布式执行器

    创建执行器项目

    创建SpringBoot项目,引入了 "xxl-job-core" 的maven依赖;配置项目POM如下

    <?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>xxl-job-taoran</groupId>
        <artifactId>xxl-job</artifactId>
        <version>1.0-SNAPSHOT</version>
    
        <properties>
            <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
            <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
            <java.version>1.8</java.version>
            <spring-boot.version>1.5.16.RELEASE</spring-boot.version>
            <elasticsearch.version>5.5.2</elasticsearch.version>
        </properties>
    
        <parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>1.5.16.RELEASE</version>
            <relativePath/> <!-- lookup parent from repository -->
        </parent>
    
    
        <dependencies>
    
            <dependency>
                <groupId>com.sun.jna</groupId>
                <artifactId>jna</artifactId>
                <version>3.0.9</version>
            </dependency>
    
            <dependency>
                <groupId>com.xuxueli</groupId>
                <artifactId>xxl-job-core</artifactId>
                <version>1.9.2</version>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-actuator</artifactId>
            </dependency>
            <!--hystrix_End-->
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-tomcat</artifactId>
                <!--<scope>provided</scope>-->
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
            </dependency>
    
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>5.1.45</version>
            </dependency>
    
            <dependency>
                <groupId>com.google.code.gson</groupId>
                <artifactId>gson</artifactId>
                <version>2.8.2</version>
            </dependency>
    
        </dependencies>
    
    
        <build>
            <plugins>
                <!-- spring-boot-maven-plugin (提供了直接运行项目的插件:如果是通过parent方式继承spring-boot-starter-parent则不用此插件) -->
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                    <version>${spring-boot.version}</version>
                    <executions>
                        <execution>
                            <goals>
                                <goal>repackage</goal>
                            </goals>
                        </execution>
                    </executions>
                </plugin>
            </plugins>
        </build>
    </project>
    

    配置执行器

    执行器配置文件:

    /src/main/resources/xxl-job-executor.properties
    

    配置参数详解:

    ### xxl-job admin address list:调度中心部署跟地址:如调度中心集群部署存在多个地址则用逗号分隔。执行器将会使用该地址进行"执行器心跳注册"和"任务结果回调"。
    xxl.job.admin.addresses=http://127.0.0.1:8080/xxl-job-admin
    
    ### xxl-job executor address:执行器"AppName"和地址信息配置:AppName执行器心跳注册分组依据;地址信息用于"调度中心请求并触发任务"和"执行器注册"。执行器默认端口为9999,执行器IP默认为空表示自动获取IP,多网卡时可手动设置指定IP,该IP不会绑定Host仅作为通讯实用。单机部署多个执行器时,注意要配置不同执行器端口;
    xxl.job.executor.appname=xxl-job-executor-sample
    xxl.job.executor.ip=
    xxl.job.executor.port=9999
    
    ### xxl-job, access token:执行器通讯TOKEN,非空时启用
    xxl.job.accessToken=
    
    ### xxl-job log path:执行器运行日志文件存储的磁盘位置,需要对该路径拥有读写权限
    xxl.job.executor.logpath=/data/applogs/xxl-job/jobhandler/
    
    ### xxl-job log retention days:执行器Log文件定期清理功能,指定日志保存天数,日志文件过期自动删除。限制至少保持3天,否则功能不生效;
    xxl.job.executor.logretentiondays=-1
    

    SpringBoot 集成

    引入配置文件,或者将配置参数直接配置在application.properties文件中

    @PropertySource(
            value = {"classpath:xxl-job-executor.properties"})
    

    配置JAVA Config,代码如下

    package com.taoran.xxl.config;
    
    import com.xxl.job.core.executor.XxlJobExecutor;
    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;
    
    /**
     * xxl-job config
     *
     * @author xuxueli 2017-04-28
     */
    //@Configuration
    public class XxlJobConfig {
        private Logger logger = LoggerFactory.getLogger(XxlJobConfig.class);
    
        @Value("${xxl.job.admin.addresses}")
        private String adminAddresses;
    
        @Value("${xxl.job.executor.appname}")
        private String appName;
    
        @Value("${xxl.job.executor.ip}")
        private String ip;
    
        @Value("${xxl.job.executor.port}")
        private int port;
    
        @Value("${xxl.job.accessToken}")
        private String accessToken;
    
        @Value("${xxl.job.executor.logpath}")
        private String logPath;
    
        @Value("${xxl.job.executor.logretentiondays}")
        private int logRetentionDays;
    
    
        @Bean(initMethod = "start", destroyMethod = "destroy")
        public XxlJobExecutor xxlJobExecutor() {
            logger.info(">>>>>>>>>>> xxl-job config init.");
            XxlJobExecutor xxlJobExecutor = new XxlJobExecutor();
            xxlJobExecutor.setAdminAddresses(adminAddresses);
            xxlJobExecutor.setAppName(appName);
            xxlJobExecutor.setIp(ip);
            xxlJobExecutor.setPort(port);
            xxlJobExecutor.setAccessToken(accessToken);
            xxlJobExecutor.setLogPath(logPath);
            xxlJobExecutor.setLogRetentionDays(logRetentionDays);
    
            return xxlJobExecutor;
        }
    
    }
    

    创建Demo Handler

    创建演示Demo

    @JobHandler(value="demoJobHandler")
    @Component
    public class DemoJobHandler extends IJobHandler {
    
        @Override
        public ReturnT<String> execute(String param) throws Exception {
            XxlJobLogger.log("XXL-JOB, Hello World.");
    
            for (int i = 0; i < 5; i++) {
                XxlJobLogger.log("beat at:" + i);
                TimeUnit.SECONDS.sleep(2);
            }
            return SUCCESS;
        }
    
    }
    

    启动SpringBoot

    @SpringBootApplication
    @ComponentScan(basePackages = "com.taoran")
    //@PropertySource(
    //        value = {"classpath:xxl-job-executor.properties"})
    //@EnableElasticsearchRepositories(basePackages = "com.taoran.es.repo")
    public class AppLoader {
        public static void main(String[] args) {
            SpringApplication.run(AppLoader.class);
        }
    }
    

    调度中心

    启动执行器

    XXL-Job将会自动将我们的Handler注册进调度中心,我们在任务调度列表中可以进行任务调度处理,如图


    image

    该死的有道会员

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