【niubi-job——一个分布式的任务调度框架】----如何开发一个niubi-job的定时任务

2年前 (2022) 程序员胖胖胖虎阿

168 0 0

引言

　　上篇文章LZ主要讲解了niubi-job如何安装，如果看过上一篇文章的话，大家应该知道，niubi-job执行的任务是需要用户自己上传jar包的。

　　那么问题来了，这个jar包如何产生？有没有要求？

　　本文就是来解决这个问题的，虽然LZ的github上面有例子，但是终究还是LZ自己解释一下会让大家更清晰一些。废话不多说，接下来咱们就来看看如何开发一个定时任务，并且可以运行在niubi-job的容器中。

概述

　　首先，LZ在设计的时候，主要将任务分成两大类：一类是运行在spring容器当中的任务，一类则是不运行在spring容器当中的任务。

　　什么叫运行在spring容器当中？

　　很简单，就是你的任务类引用了spring提供的bean，比如XXXService，或者是XXXXMapper，亦或是XXXXDao，又或者是其它。那么相反的，如果你的类可以独立运行，而不需要spring容器的运行环境，则被LZ统一看作是普通的任务。

　　PS：本文所有代码都取自niubi-job-samples，在阅读本文的时候，大家可以参考一下。

非spring环境的任务

　　第一步：使用maven建立一个普通的项目，你的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>niubi-job-parent</artifactId>
        <groupId>com.zuoxiaolong</groupId>
        <version>0.9.6</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>
    <artifactId>niubi-job-sample-common</artifactId>
    <name>${project.groupId}:${project.artifactId}</name>

</project>

　　第二步：创建你的任务java类。

　　以下这就是一个典型的非spring环境的niubi-job任务，取自niubi-job-sample-common。（niubi-job依靠@Schedule识别任务，因此如果你想让一个方法在niubi-job当中可以发布，则必须给该方法加上@Schedule注解。）

/*
 * Copyright 2002-2016 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.zuoxiaolong.niubi.job.sample.common.job;

import com.zuoxiaolong.niubi.job.core.helper.LoggerHelper;
import com.zuoxiaolong.niubi.job.scanner.annotation.Schedule;

/**
 * @author Xiaolong Zuo
 * @since 16/1/18 22:25
 */
public class Job1 {

    @Schedule(cron = "0/15 * * * * ?")
    public void job1Test() {
        LoggerHelper.info("[job1] is running.......");
    }

}

　　第三步：写一个测试类，来测试你的任务是否能正常运行。

　　运行以下这个简单的类，就可以在本地测试你的定时任务了。（本地测试时，cron和misfirePolicy会取自你Schedule注解的属性值。在任务在提交到niubi-job集群以后，会取自你在console控制台填写的值，Schedule注解的属性值将会被忽略。）

/*
 * Copyright 2002-2015 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */


package com.zuoxiaolong.niubi.job.sample.common;

import com.zuoxiaolong.niubi.job.scheduler.node.Node;
import com.zuoxiaolong.niubi.job.scheduler.node.SimpleLocalJobNode;

/**
 * @author Xiaolong Zuo
 * @since 1/22/2016 14:13
 */
public class Test {

    public static void main(String[] args) {
        //com.zuoxiaolong为任务所在的包，这个参数指定了niubi-job需要扫描哪些包找到任务。
        Node node = new SimpleLocalJobNode("com.zuoxiaolong");
        node.join();
    }

}

　　第四步：打包你的任务，上传到niubi-job的console控制台即可。

　　使用以下命令即可将你的任务打包成符合niubi-job规范的jar包。（打包后，target文件下会有一个niubi-job-sample-common.jar和一个original-niubi-job-sample-common.jar，使用niubi-job-sample-common.jar即可）

mvn clean package

spring环境的任务

　　第一步：使用maven建立一个普通的项目，你的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>niubi-job-parent</artifactId>
        <groupId>com.zuoxiaolong</groupId>
        <version>0.9.6</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>
    <artifactId>niubi-job-sample-spring</artifactId>
    <name>${project.groupId}:${project.artifactId}</name>

    <dependencies>
        <!-- 这是spring的jar包 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
        </dependency>
    </dependencies>

</project>

　　第二步：模拟一个spring容器中的bean。

　　以下这个类是一个非常普通的spring的bean。在实际开发中，它可能是任何一个在spring容器中初始化出来的bean，代码取自niubi-job-sample-spring。

/*
 * Copyright 2002-2016 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.zuoxiaolong.niubi.job.sample.spring.bean;

import com.zuoxiaolong.niubi.job.core.helper.LoggerHelper;
import org.springframework.stereotype.Service;

/**
 * @author Xiaolong Zuo
 * @since 16/1/18 22:33
 */
@Service
public class OneService {

    public void someServiceMethod1() {
        LoggerHelper.info("[job1] invoke [serviceMethod1] successfully......");
    }

    public void someServiceMethod2() {
        LoggerHelper.info("[job2] invoke [serviceMethod2] successfully......");
    }

}

　　第三步：创建你的任务java类。

　　以下就是一个需要在spring容器中运行的任务，因为它引用了上面的spring容器中的bean。（实际当中这个bean最有可能是一个XXXXService）

/*
 * Copyright 2002-2016 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.zuoxiaolong.niubi.job.sample.spring.job;

import com.zuoxiaolong.niubi.job.sample.spring.bean.OneService;
import com.zuoxiaolong.niubi.job.scanner.annotation.Schedule;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

/**
 * @author Xiaolong Zuo
 * @since 16/1/16 15:30
 */
@Component
public class Job1 {

    @Autowired
    private OneService oneService;

    @Schedule(cron = "0/15 * * * * ?")
    public void test() {
        oneService.someServiceMethod1();
    }

}

　　第四步：在classpath下创建一个applicationContext.xml。

　　以下就是一个applicationContext.xml的简单示例。（如果你原本的spring配置文件不叫applicationContext.xml，而你又不想改原本spring配置的名字，那么可以在classpath建立一个applicationContext.xml文件，并且将你原本的spring配置文件用import标签导入。）

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:job="http://www.zuoxiaolong.com/schema/niubi-job"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd
       http://www.zuoxiaolong.com/schema/niubi-job
       http://www.zuoxiaolong.com/schema/niubi-job/niubi-job-1.0.xsd">

    <!-- 你自己的一些spring配置 -->
    <context:annotation-config/>

    <context:component-scan base-package="com.zuoxiaolong.niubi.job.sample.spring"/>

    <!-- 以下这一行用于开启niubi-job的驱动,可以用于本地测试任务 -->
    <!-- packagesToScan属性指定了需要扫描那些包寻找任务 -->
    <job:job-driven packagesToScan="com.zuoxiaolong.niubi.job.sample.spring"/>

</beans>

　　第五步：写一个测试类，来测试你的任务是否能正常运行。

　　运行以下这个类，就可以测试你的任务。

/*
 * Copyright 2002-2015 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */


package com.zuoxiaolong.niubi.job.sample.spring;

import org.springframework.context.support.ClassPathXmlApplicationContext;

/**
 * use to test jobs.
 *
 * @author Xiaolong Zuo
 * @since 1/22/2016 14:19
 */
public class Test {

    public static void main(String[] args) {
        new ClassPathXmlApplicationContext("applicationContext.xml");
    }

}

　　第六步：打包你的任务，上传到niubi-job的console控制台即可。

　　使用以下命令即可将你的任务打包成符合niubi-job规范的jar包。（打包后，target文件下会有一个niubi-job-sample-spring.jar和一个original-niubi-job-sample-spring.jar，使用niubi-job-sample-spring.jar即可）