Le printemps et l'intégration Quartz avec Java Config

Nous pouvons la mettre en œuvre comme celle - ci


1) les Annotations

Le niveau de la classe d'Annotation :


Seulement, cette classe sera d'analyse pour le quartz soutien-

package com.example.config;  

import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

@Target({ ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface QuartzJob{


}

Au Niveau de la méthode d'Annotation : l'Annotation détient des biens de quartz de configuration

package com.example.config;

import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

@Target({ ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface Cron {

    String name();

    String group() default "DEFAULT_GROUP";

    String cronExp();

    String timeZone() default "Europe/London";
}

2) créer des Haricots holding méthodes pour exécuter en tant que tâche cron

package com.example.job;
public class AnotherBean  {
public void print(){
    System.out.println("I am printing in another bean");
}
}
package com.example.job;

import org.springframework.beans.factory.annotation.Autowired;

import com.example.config.Cron;
import com.example.config.QuartzJob;


@QuartzJob
public class MyJobOne {

    @Autowired
    private AnotherBean anotherBean;
    protected void myTask() {
        System.out.println("This is my task");
    }

    protected void myTask1() {
        System.out.println("This is love task");
    }


    @Cron(name="abc", cronExp="* * * * * ? *", timeZone="Asia/Kolkata")
    protected void scheduleMyJob() {
        System.out.println("This is lovely task");
        anotherBean.print();
    }

    @Cron(name="xyz", cronExp="0 35 9 ? * MON-FRI", timeZone="Asia/Kolkata")
    protected void scheduleMyJob1() {
        System.out.println("This is hate task");
    }
}

3) Auditeur à se regarder dans le haricot et d'initier Travail

package com.example.config;
import java.lang.reflect.Method;
import java.text.ParseException;
import java.util.ArrayList;
import java.util.GregorianCalendar;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.TimeZone;
import org.quartz.CronScheduleBuilder;
import org.quartz.CronTrigger;
import org.quartz.Trigger;
import org.quartz.TriggerBuilder;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationListener;
import org.springframework.context.event.ContextRefreshedEvent;
import org.springframework.scheduling.quartz.CronTriggerFactoryBean;
import org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean;
import org.springframework.scheduling.quartz.SchedulerFactoryBean;
import org.springframework.util.ReflectionUtils;
import org.springframework.util.ReflectionUtils.MethodCallback;
public class QuartJobSchedulingListener implements ApplicationListener<ContextRefreshedEvent>
{ 
@Override
public void onApplicationEvent(ContextRefreshedEvent event)
{
try 
{
ApplicationContext applicationContext = event.getApplicationContext();
List<CronTrigger> cronTriggerBeans = this.loadCronTriggerBeans(applicationContext);
if(cronTriggerBeans.size() > 0){
SchedulerFactoryBean schedulerFactoryBean =  applicationContext.getBean(SchedulerFactoryBean.class, cronTriggerBeans);
schedulerFactoryBean.start();
}
} 
catch (Exception e) 
{
e.printStackTrace();
}
}
private List<CronTrigger> loadCronTriggerBeans(ApplicationContext applicationContext)
{
Map<String, Object> quartzJobBeans = applicationContext.getBeansWithAnnotation(QuartzJob.class);
Set<String> beanNames = quartzJobBeans.keySet();
List<CronTrigger> cronTriggerBeans = new ArrayList<CronTrigger>();
for (String beanName : beanNames) 
{
Object bean = quartzJobBeans.get(beanName);
ReflectionUtils.doWithMethods(bean.getClass(), new MethodCallback(){
@Override
public void doWith(Method method) throws IllegalArgumentException, IllegalAccessException {
if(method.isAnnotationPresent(Cron.class)){
Cron cron = method.getAnnotation(Cron.class);
System.out.println("Scheduling a job for "+ bean.getClass()+ " and method "+method.getName());
MethodInvokingJobDetailFactoryBean jobDetailFactoryBean = new MethodInvokingJobDetailFactoryBean();
jobDetailFactoryBean.setName(beanName+"."+cron.name()+"."+method.getName());
jobDetailFactoryBean.setTargetMethod(method.getName());
jobDetailFactoryBean.setTargetObject(bean);
try {
jobDetailFactoryBean.afterPropertiesSet();
} catch (ClassNotFoundException e) {
//TODO Auto-generated catch block
e.printStackTrace();
} catch (NoSuchMethodException e) {
//TODO Auto-generated catch block
e.printStackTrace();
}
CronTriggerFactoryBean triggerFactoryBean = new CronTriggerFactoryBean();
triggerFactoryBean.setJobDetail(jobDetailFactoryBean.getObject());
triggerFactoryBean.setName(beanName+"_trigger_"+method.getName());
triggerFactoryBean.setCronExpression(cron.cronExp()); 
GregorianCalendar calendar = new GregorianCalendar(TimeZone.getTimeZone(cron.timeZone()));
System.out.println(calendar.getTime());
triggerFactoryBean.setStartTime(calendar.getTime());
triggerFactoryBean.setTimeZone(TimeZone.getTimeZone(cron.timeZone()));
try {
triggerFactoryBean.afterPropertiesSet();
System.out.println(triggerFactoryBean.getObject().getFinalFireTime());
System.out.println(triggerFactoryBean.getObject().getCronExpression());
} catch (ParseException e) {
//TODO Auto-generated catch block
e.printStackTrace();
}
cronTriggerBeans.add(triggerFactoryBean.getObject());
}
}
});
}
return cronTriggerBeans;
}
public Trigger getCronTrigger(String cronExpression){
CronScheduleBuilder cronScheduleBuilder=null;
Trigger cronTrigger=null;
cronScheduleBuilder=CronScheduleBuilder.cronSchedule(cronExpression);
cronScheduleBuilder.withMisfireHandlingInstructionFireAndProceed();
TriggerBuilder<Trigger> cronTtriggerBuilder=TriggerBuilder.newTrigger();
cronTtriggerBuilder.withSchedule(cronScheduleBuilder);
cronTrigger=cronTtriggerBuilder.build();
return cronTrigger;
}
}

4) Création d'JavaConfig classe-

package com.example.config;
import java.util.List;
import org.quartz.CronTrigger;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Scope;
import org.springframework.scheduling.quartz.SchedulerFactoryBean;
import com.example.job.AnotherBean;
import com.example.job.MyJobOne;
@Configuration 
public class QuartzConfiguration {
@Bean
public QuartJobSchedulingListener quartJobSchedulingListener(){
return new QuartJobSchedulingListener();
}
@Bean
public MyJobOne myJobOne(){
return new MyJobOne(); 
}
@Bean(name="scheduler")
@Scope(value="prototype")
public SchedulerFactoryBean schedulerFactoryBean(List<CronTrigger> triggerFactoryBeans) {
SchedulerFactoryBean scheduler = new SchedulerFactoryBean();
CronTrigger[] cronTriggers = new CronTrigger[triggerFactoryBeans.size()];
cronTriggers = triggerFactoryBeans.toArray(cronTriggers);
scheduler.setTriggers(cronTriggers);
System.out.println(cronTriggers[0].getCronExpression());
System.out.println(cronTriggers[0].getCalendarName());
System.out.println(cronTriggers[0].getTimeZone());
System.out.println(cronTriggers[0].getEndTime());
return scheduler;
}
@Bean
public AnotherBean anotherBean(){
return new AnotherBean();
}
}  

5) Création de la classe principale de le tester

package com.example;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.ComponentScan;
import com.example.config.QuartzConfiguration;
@ComponentScan
@EnableAutoConfiguration
public class Main {
public static void main(String[] args) {
AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext();
context.register(QuartzConfiguration.class);
context.refresh();
}
}

OriginalL'auteur Sushil