Inject Beans into Quartz Job

• NullPointerException
@Component, @Autowired를 선언해도 redisRepository NullPointerException 에러가 떴었다.

@Component
public class EveryMinuteSaveJsonJob implements Job {

    @Autowired
    private PriceInfoRedisRepository redisRepository;
}

찾아보니 Quartz는 기본적으로 @Bean 또는 applicationContext.xml 같은 설정의 스프링 빈을 인식하지 않기 때문

• 해결방법 1 : ApplicationContext.getBean()

public SchedulerFactoryBean schedulerFactoryBean() throws IOException, SchedulerException {
	SchedulerFactoryBean scheduler = new SchedulerFactoryBean();
    scheduler.setApplicationContextSchedulerContextKey("applicationContext");
	....
}

//Job 구현 클래스의 오버라이딩한 메소드
@Override
protected void excute(JobExecutionContext context) throws JobExecutionException {
	try {
    	ApplicationContext applicationContext = (ApplicationContext) 
        context.getScheduler().getContext().get("applicationContext");
 
 		redisRepository = (redisRepository) applicationContext.getBean(redisRepository.class);
    }
    catch (SchedulerException e) {
    	throw new RuntimeException(e);B
    }
    ...
}

• 해결방법 2 : bean-style usage

// 이 4가지를 사용
// 나의 기존 코드는 builder-style
@Bean
public JobDetailFactoryBean jobDetail(){}

@Bean
public SimpleTriggerFactoryBean trigger(JobDetail job){}

@Bean
public SchedulerFactoryBean scheduler(Trigger trigger, JobDetail job, DataSource quartzDataSource) {}

@Bean
public SpringBeanJobFactory springBeanJobFactory() {}

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ref
https://howtodoinjava.com/spring-batch/spring-beans-in-quartz-job/

https://www.baeldung.com/spring-quartz-schedule