Quartz Scheduler定时获取天气数据

最新推荐文章于 2024-01-02 15:34:10 发布

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本文介绍如何使用Spring Boot结合QuartzScheduler实现定时任务，以完成数据的实时同步功能。具体步骤包括：配置环境、添加依赖、创建定时任务类及配置类，并设置任务执行频率。

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==== 为啥引入Quartz Scheduler
· 实现数据同步，需要定时器

==== 开发环境
· JDK 8+
· Gradle 4+
· Redis 3.2.100
· Apache HttpClient 4.5.3
· Spring Boot Web Starter
· Spring Boot Data Redis Starter
· Spring Boot Quartz Starter
· Quartz Scheduler

==== 构建天气预报系统: 增加定时任务
1）micro-weather-0.2-redis =》 micro-weather-0.3-quartz
（后续简称gradle、src、.gitignore、build.gradle、gradlew、gradlew.bat为：两夹四件）
2）修改build.gradle，添加// Quartz依赖
compile('org.springframework.boot:spring-boot-starter-quartz')

3）导入项目到IDEA，编码
weather/job/：

package com.shijie.spring.cloud.weather.job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.scheduling.quartz.QuartzJobBean;

/**
 * Created by ShiJie on 2018/2/9 0009
 */
public class WeatherDataSyncJob extends QuartzJobBean {
    private static final Logger log = LoggerFactory.getLogger(WeatherDataSyncJob.class);
    @Override
    protected void executeInternal(JobExecutionContext context) throws JobExecutionException {
        log.info("Weather Data Sync Job");
    }
}

weather/config/：

package com.shijie.spring.cloud.weather.config;
import com.shijie.spring.cloud.weather.job.WeatherDataSyncJob;
import org.quartz.*;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * Created by ShiJie on 2018/2/9 0009
 */
@Configuration
public class QuartzConfiguration {
    private static final int INTERVAL_SECONDS = 2;// TODO 更新周期（1800s）
    // JobDetail 什么任务
    @Bean
    public JobDetail weatherDataSyncJobDetail(){
        return JobBuilder.newJob(WeatherDataSyncJob.class)
                .withIdentity("WeatherDataSyncJob").storeDurably().build();
    }

    // Trigger 何时触发
    @Bean
    public Trigger weatherDataSyncTrigger(){
        SimpleScheduleBuilder scheduleBuilder = SimpleScheduleBuilder.simpleSchedule()
                .withIntervalInSeconds(INTERVAL_SECONDS).repeatForever();
        return TriggerBuilder.newTrigger().forJob(weatherDataSyncJobDetail())
                .withIdentity("weatherDataSyncTrigger").withSchedule(scheduleBuilder).build();
    }

}