分散式任務排程平臺 → XXL-JOB 實戰
開心一刻
老師:誰知道鞭炮用英語怎麼說?
甲:老師!老師!我知道,鞭炮的英文是pilipala。
老師:那閃電呢?
乙:kucha kucha
老師:那舞獅呢?
丙:dong dong qiang
老師:你們幾個先歇會吧!太費嗓子了!
老師:下一個,誰知道墨家創始人墨子的英文怎麼翻譯?
丁:black baby
老師:那老子是不是叫old baby?好了最後一題!我們都知道有位大詩人叫陸游,請問他的英文名應該怎麼翻譯呢?
辛:wifi
同學們:啊哈哈哈哈!!!
前傾回顧
分散式任務排程平臺 → XXL-JOB 初探 中,我們簡單介紹了 XXL-JOB,並簡單搭建了一個叢集環境
可我們是在 XXL-JOB 官方的示例程式碼基礎上來搭建的,沒用應用到我們的專案中去
那如何應用到我們的專案中去了,將 xxl-job-admin、xxl-job-core、xxl-job-executor 的原始碼都引入到我們的專案中 ?這樣可行,但沒必要
我們細想下,xxl-job-admin 作為排程中心,有視覺化的 web 管理介面, 可將其作為一個模組以原始碼的方式引入到我們的專案中,我們可對其進行自定義的修改,但一般不需要;xxl-job-core 是 XXL-JOB 的核心,絕大多數情況下我們不用對其進行自定義(一方面它已滿足排程的常規需求,另一方面則是需要對 xxl-job-core 有一定的瞭解才敢去進行自定義的修改),那麼我們以 jar 依賴的方式引入即可;至於 xxl-job-executor,它是和我們專案結合最緊密的,也是需要我們自定義的,那麼我們參考官方的示例即可,不需要引入 xxl-job-executor 示例原始碼
具體實現我們往下看
專案搭建
專案結構如下
此時只有架子,都是空實現(包括 pom.xml),我們一步一步的填充內容
project-parent
作為父工程,可以統一配置子工程中依賴的 jar 包的版本,具體內容如下
<?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>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 作為依賴引入 --> <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
這個好處理,將官方示例原始碼中的 xxl-job-admin 的 src 資料夾直接拷貝過來覆蓋已有的 src,pom.xml 新增如下內容
<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>View Code
然後修改:application.properties 中的配置,例如埠號,資料庫連線地址、使用者名稱、密碼等等,改好之後我們啟動下,就知道 xxl-job-admin 是否搭建好了
啟動沒報錯,我們訪問下:http://localhost:8080/xxl-job-admin,出現如下登入介面,則表示 xxl-job-admin 搭建完成
my-project
這個就是我們的專案工程,排程以外的程式碼該怎麼寫還是怎麼寫,下面我們只講排程相關的
實際專案中,任務排程往往會操作資料庫,我們加入相關依賴,pom.xml 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"> <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>View Code
配置 application.properties
### 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=30View Code
新增 Job 執行器:XxlJobConfig.java
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; } /** * 針對多網絡卡、容器內部署等情況,可藉助 "spring-cloud-commons" 提供的 "InetUtils" 元件靈活定製註冊IP; * * 1、引入依賴: * <dependency> * <groupId>org.springframework.cloud</groupId> * <artifactId>spring-cloud-commons</artifactId> * <version>${version}</version> * </dependency> * * 2、配置檔案,或者容器啟動變數 * spring.cloud.inetutils.preferred-networks: 'xxx.xxx.xxx.' * * 3、獲取IP * String ip_ = inetUtils.findFirstNonLoopbackHostInfo().getIpAddress(); */ }View Code
新增 Job:UserJob.java
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..."); // 查詢資料庫,業務處理後再寫回資料庫 List<User> users = userService.listAll(); System.out.println(users); return ReturnT.SUCCESS; } }View Code
專案工程完整程式碼:my-xxl-job
排程配置
啟動 xxl-job-admin、my-project 後,在排程中心配置執行器
配置任務
具體配置過程、排程啟動、叢集搭建可檢視 分散式任務排程平臺 → XXL-JOB 初探
總結
1、xxl-job-admin 基本按原始碼引入就好,基本不需要改動
2、xxl-job-core 被 xxl-job-admin 和 xxl-job-executor 依賴,我們以 jar 包的方式依賴進來就好,無需引入原始碼
3、xxl-job-executor 的改造其實也簡單,加入相應的配置,將我們常規的定時任務改成 xxl-job 的方式就好
4、可能存在一些細節未講到,如果有不理解的地方,多看看 my-xxl-job 原始碼就好
參考
XXL