Spring quartz Job依賴注入使用詳解
一、問題描述:
使用Spring整合quartz實現動態任務時,想在job定時任務中使用某個service時,直接通過加注解@Component、@Autowired是不能注入的,獲取的對象為Null。如下面的代碼:
@Component @PersistJobDataAfterExecution @DisallowConcurrentExecution public class TicketSalePriceLessThanLowestPriceJob implements Job{ @Autowired private XxxService xxxService; }
二、解決方案:
1、新增一個自定義類(CustomJobFactory),繼承SpringBeanJobFactory,代碼如下:
import org.quartz.spi.TriggerFiredBundle; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.config.AutowireCapableBeanFactory; import org.springframework.scheduling.quartz.SpringBeanJobFactory; public class CustomJobFactory extends SpringBeanJobFactory{ @Autowired private AutowireCapableBeanFactory capableBeanFactory; @Override protected Object createJobInstance(TriggerFiredBundle bundle) throws Exception { //調用父類的方法 Object jobInstance = super.createJobInstance(bundle); //進行注入 capableBeanFactory.autowireBean(jobInstance); return jobInstance; } }
2、在spring.xml文件配置CustomJobFactory,如下:
bean id="customJobFactory" class="cn.imovie.manage.task.job.CustomJobFactory">/bean>
3、將自定義CustomJobFactory注入到org.springframework.scheduling.quartz.SchedulerFactoryBean,具體如下:
property name="jobFactory" ref="customJobFactory">/property>
完整代碼如下:
!-- 定時任務配置 start --> bean id="scheduler" class="org.springframework.scheduling.quartz.SchedulerFactoryBean"> property name="dataSource" ref="dataSource">/property> !--可選,QuartzScheduler 啟動時更新己存在的Job,這樣就不用每次修改targetObject后刪除qrtz_job_details表對應記錄了 --> property name="overwriteExistingJobs" value="true" /> !--必須的,QuartzScheduler 延時啟動,應用啟動完后 QuartzScheduler 再啟動 --> property name="startupDelay" value="10" /> !-- 設置自動啟動 --> property name="autoStartup" value="true" /> property name="jobFactory" ref="customJobFactory">/property> property name="applicationContextSchedulerContextKey" value="applicationContextKey" /> property name="configLocation" value="classpath:spring-quartz.properties" /> /bean> !-- 定時任務配置 end -->
4、然后就可以在Job任務類使用@Autowired注入service。
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