Jfinal实现定时任务调度

时间：2022-11-03 07:59:39

很多时候，我们会遇到让系统自动执行某段代码去执行业务相关逻辑。如生日短信通知，我们需要一个定时任务，获取到生日当天的所有用户，然后执行短信推送等业务逻辑，Jfinal是如何实现定时任务调度呢？

第一步：在Jfinal的过滤器中的configPlugin方法中加入自己实现的jfinal插件接口类配置。

@Override
public void configPlugin(Plugins me){
QuartzPlugin plugin = new QuartzPlugin("job.properties");
me.add(plugin);
//...数据源等其他配置
}

其中QuartzPlugin类的代码如下：
package com.wlkj.common.config;

import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.Properties;

import org.apache.log4j.Logger;
import org.quartz.CronScheduleBuilder;
import org.quartz.CronTrigger;
import org.quartz.Job;
import org.quartz.JobBuilder;
import org.quartz.JobDetail;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.SchedulerFactory;
import org.quartz.TriggerBuilder;
import org.quartz.impl.StdSchedulerFactory;

import com.jfinal.plugin.IPlugin;

public class QuartzPlugin implements IPlugin {

private final Logger logger = Logger.getLogger(QuartzPlugin.class);

private static final String JOB = "job";

private String config = "job.properties";

private Properties properties;

public QuartzPlugin(String config) {
    this.config = config;
}
public QuartzPlugin() {
}
private SchedulerFactory schedulerFactory;
private Scheduler scheduler;

@SuppressWarnings("unchecked")
public boolean start() {
    try {
        loadProperties();
    } catch (IOException e) {
        logger.error(e.getMessage());
        return false;
    }
    if (properties == null) {
        return false;
    }
    schedulerFactory = new StdSchedulerFactory();
    try {
        scheduler = schedulerFactory.getScheduler();
    } catch (SchedulerException e) {
        logger.error(e.getMessage());
        return false;
    }
    if (scheduler == null) {
        logger.error("scheduler is null");
        return false;
    }
    Enumeration<Object> enums = properties.keys();
    while (enums.hasMoreElements()) {
        String key = enums.nextElement() + "";
        if (!key.endsWith(JOB) || !isTrue(getJobKey(key, "enable"))) {
            continue;
        }
        String jobClassName = properties.get(key) + "";
        String jobName = key.substring(0, key.lastIndexOf("."));
        String jobCronExp = properties.getProperty(getJobKey(key, "cron")) + "";
        String jobGroup = properties.getProperty(getJobKey(key, "group", "jobGroup1"));
        Class<? extends Job> jobClass = null;
        try {
            jobClass = (Class<? extends Job>) Class.forName(jobClassName);
        } catch (ClassNotFoundException e) {
            logger.error(e.getMessage());
            return false;
        }
        JobDetail job = JobBuilder.newJob(jobClass).withIdentity(jobName, jobGroup).build();
        CronTrigger trigger = TriggerBuilder.newTrigger().withIdentity("trigger", jobGroup)
                .withSchedule(CronScheduleBuilder.cronSchedule(jobCronExp)).build();
        try {
            scheduler.scheduleJob(job, trigger);
            scheduler.start();
        } catch (SchedulerException e) {
            logger.error(e.getMessage());
            return false;
        }
    }
    return true;
}

public boolean stop() {
    try {
        scheduler.shutdown();
    } catch (SchedulerException e) {
        logger.error(e.getMessage());
        return false;
    }
    return true;
}

private void loadProperties() throws IOException {
    properties = new Properties();
    InputStream is = QuartzPlugin.class.getClassLoader().getResourceAsStream(config);
    properties.load(is);
}

private String getJobKey(String str, String type, String defaultValue) {
    String key = getJobKey(str, type);
    if (key == null || "".equals(key.trim()))
        return defaultValue;
    return key;

}

private String getJobKey(String str, String type) {
    return str.substring(0, str.lastIndexOf(JOB)) + type;
}

private boolean isTrue(String key) {
    Object enable = properties.get(key);
    if (enable != null && "false".equalsIgnoreCase((enable + "").trim())) {
        return false;
    }
    return true;
}

}
第二步：在classpath类路径下新建job.properties文件。
job.properties文件的内容如下：

birthday.job=com.wlkj.common.config.StatisticExecutor
birthday.cron=0 1 0 ? * *
birthday.enable=true
birthday.group=1

注意：该文件的前缀必须相同，可随意取名，job的值com.wlkj.common.config.StatisticExecutor为执行任务调度的类
代码如下：

import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
public class StatisticExecutor implements Job{
@Override
public void execute(JobExecutionContext context) throws JobExecutionException{
//配置好后就会在规定的之间点执行这里的代码了，需要了解job.properties里birthday.cron表达式了
//# s m h d m w(?) y(?) second minute hour date month week year 
}
}

还得加入quartz的jar包，和slf4j-api和slf4j-log4j的jar

附：支持多任务调度

public boolean start() {
try {
 loadProperties();
 } catch (IOException e) {
 logger.error(e.getMessage());
return false;
 }
if (properties == null) {
return false;
 }
 Map<String, Object> jobMap = new HashMap<String, Object>();
 Enumeration<Object> enums = properties.keys();
while (enums.hasMoreElements()) {
 String key = enums.nextElement() + "";
if (!key.endsWith(JOB) || !isTrue(getJobKey(key, "enable"))) {
continue;
 }
 String jobName = key.substring(0, key.lastIndexOf("."));
if (!jobMap.containsKey(jobName)) {
 Map<String, String> jobData = new HashMap<String, String>();
 jobData.put("jobClassName", properties.getProperty(jobName + ".job") + "");
 jobData.put("jobName", jobName);
 jobData.put("jobCronExp", properties.getProperty(jobName + ".cron") + "");
 jobData.put("jobGroup", properties.getProperty(jobName + ".group") + "");
 jobMap.put(jobName, jobData);
 }
 }
for (String mapKey : jobMap.keySet()) {
 Map<String, String> jobData = (Map<String, String>) jobMap.get(mapKey);
 String jobClassName = jobData.get("jobClassName");
 String jobName = jobData.get("jobName");
 String jobCronExp = jobData.get("jobCronExp");
 String jobGroup = jobData.get("jobGroup");
Class<? extends Job> jobClass = null;
try {
 jobClass = (Class<? extends Job>) Class.forName(jobClassName);
 } catch (ClassNotFoundException e) {
 logger.error(e.getMessage());
return false;
 }
 JobDetail job = JobBuilder.newJob(jobClass).withIdentity(jobName, jobGroup).build();
 CronTrigger trigger = TriggerBuilder.newTrigger().withIdentity("trigger", jobGroup)
 .withSchedule(CronScheduleBuilder.cronSchedule(jobCronExp)).build();
try {
 schedulerFactory = new StdSchedulerFactory();
try {
 scheduler = schedulerFactory.getScheduler();
 } catch (SchedulerException e) {
 logger.error(e.getMessage());
return false;
 }
if (scheduler == null) {
 logger.error("scheduler is null");
return false;
 }
 scheduler.scheduleJob(job, trigger);
 scheduler.start();
 } catch (SchedulerException e) {
 logger.error(e.getMessage());
return false;
 }
 }
return true;
 }

无非是获取到多个job名字用临时map进行存储，然后使用java反射机制遍历执行调度任务。
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