quartz集羣 XML

爲什麼使用quartz分佈式集羣

像之前的quartz和spring scheduler如果我們部署在單臺機器上，雖然表面上我們解決了多臺機器重複執行的問題，但是卻有隱含的風險。單臺機器如果宕機，那麼定時任務功能將會導致停止，所以要部署到多臺，保證系統的高可用性。並且隨着我們要執行的定時任務越來越多，那麼單臺的壓力會越大。
如果我們部署到多臺機器上，那麼隨之而來的問題就是重複記錄如何避免。那麼就需要我們去了解分佈式鎖的實現方式。而quartz的集羣就採用了mysql的行級鎖互斥來防止重複記錄的。

環境搭建

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jdbc</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <!-- MySQL相關包 -->
    <dependency> 
        <groupId>mysql</groupId> 
        <artifactId>mysql-connector-java</artifactId> 
        <version>5.1.26</version> 
    </dependency>
    <!-- 數據庫連接池 -->
    <dependency> 
        <groupId>com.alibaba</groupId> 
        <artifactId>druid</artifactId> 
        <version>1.0.20</version> 
    </dependency>
    <!-- quartz組件 -->
    <dependency>
        <groupId>org.quartz-scheduler</groupId>
        <artifactId>quartz</artifactId>
        <version>2.2.1</version>
    </dependency>
    <dependency>
        <groupId>org.quartz-scheduler</groupId>
        <artifactId>quartz-jobs</artifactId>
        <version>2.2.1</version>
    </dependency>

搭建工程

1. properties配置文件
   ① sys.properties

jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://IP:3306/sunpy-quartz?characterEncoding=utf-8
jdbc.username=用戶名
jdbc.password=密碼
jdbc.initialSize=1
jdbc.maxActive=30
jdbc.minIdle=1

② quartz.properties

org.quartz.scheduler.instanceName=myQuartzScheduler
org.quartz.scheduler.instanceId=AUTO
#quartz-scheduler出口本身通過RMI作爲服務器，然後設置“出口”標誌true(默認值爲false)
org.quartz.scheduler.rmi.export = false
org.quartz.scheduler.rmi.proxy = false

org.quartz.threadPool.class=org.quartz.simpl.SimpleThreadPool
org.quartz.threadPool.threadCount=10
org.quartz.threadPool.threadPriority=5

#配置JobStore
org.quartz.jobSotre.useProperties=false
org.quartz.jobStore.tablePrefix=QRTZ_
#信息保存時間 默認值60秒
org.quartz.jobStore.misfireThreshold=60000

#開啓集羣
org.quartz.jobStore.isClustered=true
org.quartz.jobStore.clusterCheckinInterval=5000
org.quartz.jobStore.txIsolationLevelReadCommitted=true

org.quartz.jobStore.class=org.quartz.impl.jdbcjobstore.JobStoreTX
org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.StdJDBCDelegate

1. XML配置文件

<?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:beans="http://www.springframework.org/schema/beans"  
    xmlns:context="http://www.springframework.org/schema/context"  
    xmlns:aop="http://www.springframework.org/schema/aop"  
    xmlns:mvc="http://www.springframework.org/schema/mvc"  
    xmlns:p="http://www.springframework.org/schema/p"  
    xmlns:task="http://www.springframework.org/schema/task" 
    xsi:schemaLocation="http://www.springframework.org/schema/beans   
    http://www.springframework.org/schema/beans/spring-beans-4.0.xsd  
    http://www.springframework.org/schema/context  
    http://www.springframework.org/schema/context/spring-context-4.0.xsd  
    http://www.springframework.org/schema/aop  
    http://www.springframework.org/schema/aop/spring-aop-4.0.xsd  
    http://www.springframework.org/schema/mvc  
    http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
    http://www.springframework.org/schema/task
    http://www.springframework.org/schema/task/spring-task-4.0.xsd">  
    
    <context:component-scan base-package="cn.sunpy.*"></context:component-scan>
    <context:annotation-config></context:annotation-config>
    <context:property-placeholder location="classpath:sys.properties"/>
    
    <beans:bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <beans:property name="driverClassName" value="${jdbc.driverClassName}"></beans:property>
        <beans:property name="url" value="${jdbc.url}"></beans:property>
        <beans:property name="username" value="${jdbc.username}"></beans:property>
        <beans:property name="password" value="${jdbc.password}"></beans:property>
        <beans:property name="initialSize" value="${jdbc.initialSize}"></beans:property>
        <beans:property name="minIdle" value="${jdbc.minIdle}"></beans:property>
        <beans:property name="maxActive" value="${jdbc.maxActive}"></beans:property>
    </beans:bean>
    
    <!-- 配置JobDetail -->
    <beans:bean id="myJobDetail" class="org.springframework.scheduling.quartz.JobDetailFactoryBean">
        <beans:property name="jobClass" value="cn.sunpy.quartz.MyJob"></beans:property>
    </beans:bean>
    
    <!-- 配置Cron觸發器 -->
    <beans:bean id="myCronTrigger" class="org.springframework.scheduling.quartz.CronTriggerFactoryBean">
        <beans:property name="jobDetail" ref="myJobDetail"></beans:property>
        <beans:property name="cronExpression" value="0 54 16 * * ?"></beans:property>   
    </beans:bean>
        
    <!-- 配置調度者 -->
    <beans:bean id="myScheduler" class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
        <beans:property name="configLocation" value="classpath:quartz.properties"></beans:property>
        <beans:property name="dataSource" ref="dataSource"></beans:property>
        
        <beans:property name="triggers">
            <beans:list>
                <beans:ref bean="myCronTrigger"/>
            </beans:list>
        </beans:property>
        
        <beans:property name="quartzProperties">
            <beans:props>
                <beans:prop key="org.quartz.scheduler.skipUpdateCheck">true</beans:prop>
            </beans:props>
        </beans:property>
    </beans:bean>
</beans>

1. 任務

public class MyJob implements Job{

    @Override
    public void execute(JobExecutionContext context)
            throws JobExecutionException {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        System.out.println("MyJob execute" + sdf.format(new Date()));
    }
}

 

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中間件 / 分佈式

 

作者：sunpy
鏈接：https://www.jianshu.com/p/fd6dd2af89c5
來源：簡書
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