新增: 初始化工程
commit
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HELP.md
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target/
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!.mvn/wrapper/maven-wrapper.jar
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!**/src/main/**/target/
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!**/src/test/**/target/
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### STS ###
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.apt_generated
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.classpath
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.factorypath
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.project
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.settings
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.springBeans
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.sts4-cache
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### IntelliJ IDEA ###
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.idea
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*.iws
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*.iml
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*.ipr
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### NetBeans ###
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/nbproject/private/
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/nbbuild/
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/dist/
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/nbdist/
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/.nb-gradle/
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build/
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!**/src/main/**/build/
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!**/src/test/**/build/
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### VS Code ###
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.vscode/
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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
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https://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<parent>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-parent</artifactId>
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<version>2.7.7</version>
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<relativePath/>
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</parent>
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<groupId>space.caoshd</groupId>
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<artifactId>dynamic-schedule</artifactId>
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<version>1.0.0-SNAPSHOT</version>
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<name>dynamic-schedule</name>
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<properties>
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<java.version>1.8</java.version>
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</properties>
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<dependencies>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-test</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.projectlombok</groupId>
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<artifactId>lombok</artifactId>
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<scope>provided</scope>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-maven-plugin</artifactId>
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</plugin>
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</plugins>
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</build>
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</project>
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package space.caoshd.dyn_sch;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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import org.springframework.scheduling.annotation.EnableScheduling;
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@SpringBootApplication
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@EnableScheduling
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public class DynamicScheduleApplication {
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public static void main(String[] args) {
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SpringApplication.run(DynamicScheduleApplication.class, args);
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}
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}
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package space.caoshd.dyn_sch.schedule;
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import lombok.Data;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.beans.factory.annotation.Value;
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import org.springframework.scheduling.annotation.SchedulingConfigurer;
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import org.springframework.scheduling.config.ScheduledTaskRegistrar;
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import org.springframework.scheduling.support.CronTrigger;
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import org.springframework.scheduling.support.PeriodicTrigger;
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import org.springframework.stereotype.Component;
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import java.time.LocalDateTime;
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@Data
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@Slf4j
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@Component
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public class DynamicSchedule implements SchedulingConfigurer {
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@Value("${app.schedule.cron: */1 * * * * ?}")
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private String cron;
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@Value("${app.schedule.period: 1000}")
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private Long period;
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@Override
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public void configureTasks(ScheduledTaskRegistrar taskRegistrar) {
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// 使用 cron 表达式 动态设置循环间隔
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taskRegistrar.addTriggerTask(
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() -> log.info("current time trigger by cron : {}", LocalDateTime.now()),
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context -> new CronTrigger(cron).nextExecutionTime(context)
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);
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// 使用 固定周期 动态设置循环间隔
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taskRegistrar.addTriggerTask(
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() -> log.info("current time trigger by period: {}", LocalDateTime.now()),
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context -> new PeriodicTrigger(period).nextExecutionTime(context)
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);
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}
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}
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package space.caoshd.dyn_sch;
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import lombok.extern.slf4j.Slf4j;
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import org.junit.jupiter.api.Test;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.boot.test.context.SpringBootTest;
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import space.caoshd.dyn_sch.schedule.DynamicSchedule;
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import java.util.concurrent.TimeUnit;
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@SpringBootTest
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@Slf4j
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class DemoApplicationTests {
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@Autowired
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DynamicSchedule dynamicSchedule;
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@Test
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public void updateCron() throws Exception {
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// 先是每隔一秒执行一次
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TimeUnit.SECONDS.sleep(10);
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// 十秒钟后 更新 cron 配置
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String cron = "*/5 * * * * ?";
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log.info("update cron: {}", cron);
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dynamicSchedule.setCron(cron);
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// 20 秒后 程序关闭
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TimeUnit.SECONDS.sleep(20);
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}
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@Test
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public void updatePeriod() throws Exception {
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// 先是每隔一秒执行一次
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TimeUnit.SECONDS.sleep(10);
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// 十秒钟后 更新 period 配置
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Long period = 5000L;
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log.info("update period: {}", period);
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dynamicSchedule.setPeriod(period);
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// 20 秒后 程序关闭
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TimeUnit.SECONDS.sleep(20);
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}
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}
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