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This article mainly explains "how to use @ Scheduled to read dynamic parameters in SpringBoot project". Interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn how to use @ Scheduled to read dynamic parameters in SpringBoot projects.

Using @ Scheduled to read dynamic parameter 1, based on @ Scheduled configurable development application.propertites: read.timer.parmas=0 0Unip 1 *

Timing class:

@ Componentpublic class ScheduledService {Logger logger= LoggerFactory.getLogger (ScheduledService.class); @ Scheduled (cron = "${read.timer.parmas}") public void readConfigTable () {logger.info ("* .read.timer.parmas");}}

Startup class:

@ SpringBootApplication@EnableScheduling / / must public class DataApplication {public static void main (String [] args) {SpringApplication.run (DataApplication.class,args);}} 2, code-based implementation

(1) Core code

@ Component@EnableSchedulingpublic class TestScheduledParams implements SchedulingConfigurer {Logger logger= LoggerFactory.getLogger (TestScheduledParams.class); public static String DEFAULT_CORN= "0ram 3 *"; / / # # dynamic parameters to be passed to the default value. Public static String corn=DEFAULT_CORN; @ Override public void configureTasks (ScheduledTaskRegistrar taskRegistrar) {taskRegistrar.addTriggerTask (new Runnable () {@ Override public void run () {/ / logger.info (scheduled task logic)) }}, new Trigger () {@ Override public Date nextExecutionTime (TriggerContext triggerContext) {/ / task trigger, you can modify the task execution cycle CronTrigger cronTrigger = new CronTrigger (corn); Date date = cronTrigger.nextExecutionTime (triggerContext); return date;}});}}

(2) dynamic parameter assignment of other classes or methods

TestScheduledParams.corn= "0tap 20 *" spring boot Scheduled dynamically configure package cn.com.suntree.cmp.service;import cn.com.suntree.cmp.utils.CommonUtil;import lombok.extern.log4j.Log4j2;import org.apache.commons.lang3.StringUtils;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.scheduling.Trigger;import org.springframework.scheduling.TriggerContext;import org.springframework.scheduling.annotation.SchedulingConfigurer;import org.springframework.scheduling.config.ScheduledTaskRegistrar;import org.springframework.scheduling.support.CronTrigger Import org.springframework.stereotype.Component;import redis.clients.jedis.Jedis;import java.util.Date;@Component@Log4j2public class MyDynamicTask implements SchedulingConfigurer {/ / implements the SchedulingConfigurer interface @ Autowired CommonUtil commonUtil; @ Autowired TaskService taskService; private static String cron; @ Override public void configureTasks (ScheduledTaskRegistrar scheduledTaskRegistrar) {/ / overrides the method scheduledTaskRegistrar.addTriggerTask (doTask (), getTrigger ()) } private Runnable doTask () {return new Runnable () {@ Override public void run () {log.info ("--execute" + cron); taskService.monDay () / / the logic code that really needs to be run}};} private Trigger getTrigger () {return new Trigger () {@ Override public Date nextExecutionTime (TriggerContext triggerContext) {/ / trigger CronTrigger trigger = new CronTrigger (getCron ()); return trigger.nextExecutionTime (triggerContext) }};} public String getCron () {Jedis jedis = commonUtil.getJedis (); String newCron = jedis.get ("cron"); / / can be configured to if (StringUtils.isEmpty (newCron)) {jedis.set ("cron", "0300? * Mon") in the database; return "0300? * Mon" } if (! newCron.equals (cron)) {log.info (new StringBuffer ("Cron has been changed to:'") .append (newCron) .append ("'. Old cron was:' ") .append (cron) .append ("'") .append ("'"). ToString (); cron = newCron;} return cron;}} so far, I believe you have a deeper understanding of" how to use @ Scheduled to read dynamic parameters in a SpringBoot project ". You might as well do it in practice! Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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