Spring整合Quartz(Spring:4.2.6.RELEASE+Quartz 2.2.1)

前言

Quartz作爲一種常用的定時任務框架，有一定的使用場景，因此以下介紹Spring 整合 Quartz。因爲是一篇介紹使用的博文，所以只介紹測試通過的配置：

配置詳解

1. 項目版本配置：

   //gradle
   ext{
   springVersion = "4.2.6.RELEASE"
   }
   dependencies{
   
   //Spring
   compile "org.springframework:spring-beans:$springVersion"
   compile "org.springframework:spring-context:$springVersion"
   compile "org.springframework:spring-core:$springVersion"
   compile "org.springframework:spring-oxm:$springVersion"
   compile "org.springframework:spring-web:$springVersion"
   compile "org.springframework:spring-webmvc:$springVersion"
   compile "org.springframework:spring-tx:$springVersion"
   compile "org.springframework:spring-aop:$springVersion"
   compile "org.springframework:spring-context-support:$springVersion"
   compile "org.springframework:spring-test:$springVersion"
   compile "org.springframework:spring-orm:$springVersion"
   compile "org.springframework:spring-jdbc:$springVersion"
   // https://mvnrepository.com/artifact/org.apache.archiva.redback.components/spring-quartz
   compile "org.apache.archiva.redback.components:spring-quartz:2.1"
   
   }

2. Spring+Quartz配置：

   spring-quartz.xml

   <?xml version="1.0" encoding="UTF-8"?>
   <beans xmlns="http://www.springframework.org/schema/beans"
   xmlns:p="http://www.springframework.org/schema/p" 
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://www.springframework.org/schema/beans
          http://www.springframework.org/schema/beans/spring-beans.xsd">
   <bean id = "BaseJob" class="com.xxx.quartz.DailyJob"/>
   <bean name="dailyJob" class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
       <property name="targetObject">
         <ref bean="BaseJob"/>
       </property>
       <property name="targetMethod">  <!-- 要執行的方法名稱 -->
         <value>execute</value>
       </property>
   </bean>
   
   <!-- 時間調度規則 --!>
   <bean id="cronTrigger" class="org.springframework.scheduling.quartz.CronTriggerFactoryBean">
       <property name="jobDetail" ref="dailyJob" />
           <!-- 此處具體規則可參考quartz的官方文檔或者其他博客 --!>
           <!-- 此處意思是每天每小時每隔一分鐘執行一次 --!>
       <property name="cronExpression" value="0 0/1 * * * ? *" />
   </bean>
   
   <bean class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
       <property name="triggers">
           <list>
               <ref bean="cronTrigger" />
           </list>
       </property>
   </bean>
   </beans>

   public class DailyJob {
   
   @Resource
   private DrivingRecordService drivingRecordService;
   private static final Logger log = Logger.getLogger(DailyJob.class);
   
   
   protected void execute() throws JobExecutionException {
       log.info("before update");
       try{
           drivingRecordService.refreshRedisCache();
       } catch(Exception e){
           e.printStackTrace();
       }
       log.info("finish update");
   }
   }

   <?xml version="1.0" encoding="UTF-8"?>
     <beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:p="http://www.springframework.org/schema/p"
       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.springframework.org/schema/aop
             http://www.springframework.org/schema/aop/spring-aop.xsd
             http://www.springframework.org/schema/tx
             http://www.springframework.org/schema/tx/spring-tx.xsd">
       <context:component-scan base-package="com.xxx.service"/>
   
       <import resource="spring-quartz.xml"/>
   
     </beans>

   web.xml

   <context-param>
         <param-name>contextConfigLocation</param-name>
         <param-value>classpath:spring/springContext.xml</param-value>
       </context-param>
       <listener>
         <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
       </listener>

   ​

綜述

首先這種配置方式與常規配置方式不同。Job並沒有實現Quartz的job接口，也沒有繼承Spring中的QuartzJobBean類，而是採用了普通的POJO類的形式。在配置中，通過Spring的MethodInvokingJobDetailFactoryBean配合類名和類方法構造出一個Job類，用這個代理的job類配合時間調度器cronTrigger和容器 Scheduler完成任務調度。

​ 這種配置的最大的優點是可以注入Service。而常規配置方法，Job注入Service後空指針異常。這是解決這個問題最簡便的方式。