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Eugen
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Merge pull request eugenp#59 from mgooty/master
Added example code for usage and configuration of @scheduled annotation.
2 parents 9b0dfc4 + fbe55d0 commit bf8bc8b

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Lines changed: 114 additions & 2 deletions

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‎spring-all/pom.xml‎

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</dependency>
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<!-- persistence -->
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<dependency>
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<groupId>org.hibernate</groupId>
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<artifactId>hibernate-core</artifactId>
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<version>${mockito.version}</version>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<build>

‎spring-all/src/main/java/org/baeldung/scheduling/ScheduledAnnotationExample.java‎

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package org.baeldung.scheduling;
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import org.springframework.scheduling.annotation.Scheduled;
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import org.springframework.stereotype.Component;
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@Component
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public class ScheduledAnnotationExample {
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@Scheduled(fixedDelay = 1000)
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public void scheduleFixedDelayTask() {
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System.out.println("Fixed delay task - " + System.currentTimeMillis() / 1000);
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}
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@Scheduled(fixedDelayString = "${fixedDelay.in.milliseconds}")
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public void scheduleFixedDelayTaskUsingExpression() {
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System.out.println("Fixed delay task - " + System.currentTimeMillis() / 1000);
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}
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@Scheduled(fixedDelay = 1000, initialDelay = 2000)
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public void scheduleFixedDelayWithInitialDelayTask() {
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System.out.println("Fixed delay task with one second initial delay - " + System.currentTimeMillis() / 1000);
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}
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@Scheduled(fixedRate = 1000)
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public void scheduleFixedRateTask() {
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System.out.println("Fixed rate task - " + System.currentTimeMillis() / 1000);
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}
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@Scheduled(fixedRateString = "${fixedRate.in.milliseconds}")
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public void scheduleFixedRateTaskUsingExpression() {
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System.out.println("Fixed rate task - " + System.currentTimeMillis() / 1000);
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}
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@Scheduled(fixedDelay = 1000, initialDelay = 100)
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public void scheduleFixedRateWithInitialDelayTask() {
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System.out.println("Fixed delay task with one second initial delay - " + System.currentTimeMillis() / 1000);
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}
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/**
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* Scheduled task is executed at 10:15 AM on the 15th day of every month
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*/
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@Scheduled(cron = "0 15 10 15 * ?")
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public void scheduleTaskUsingCronExpression() {
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System.out.println("schedule tasks using cron expressions - " + System.currentTimeMillis() / 1000);
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}
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@Scheduled(cron = "${cron.expression}")
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public void scheduleTaskUsingExternalizedCronExpression() {
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System.out.println("schedule tasks using externalized cron expressions - " + System.currentTimeMillis() / 1000);
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}
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}

‎spring-all/src/main/java/org/baeldung/scheduling/SpringSchedulingConfig.java‎

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package org.baeldung.scheduling;
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import org.springframework.context.annotation.Bean;
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import org.springframework.context.annotation.ComponentScan;
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import org.springframework.context.annotation.Configuration;
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import org.springframework.context.annotation.PropertySource;
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import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
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import org.springframework.scheduling.annotation.EnableScheduling;
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@Configuration
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@EnableScheduling
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@ComponentScan("com.baeldung.spring.integration")
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@PropertySource("classpath:springIntegration.properties")
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public class SpringSchedulingConfig {
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@Bean
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public static PropertySourcesPlaceholderConfigurer propertySourcesPlaceholderConfigurer() {
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return new PropertySourcesPlaceholderConfigurer();
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}
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}

‎spring-all/src/main/resources/springScheduled-config.xml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xmlns:task="http://www.springframework.org/schema/task" xmlns:context="http://www.springframework.org/schema/context"
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xsi:schemaLocation="http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-4.1.xsd
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http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd">
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<!-- Configure the scheduler -->
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<task:scheduler id="myScheduler" pool-size="10" />
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<bean id="myscheduler" name="myscheduler"
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class="org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler">
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</bean>
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<!-- Configure the fixedDealy, fixedRate or cron based schduled tasks -->
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<task:scheduled-tasks scheduler="myScheduler">
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<task:scheduled ref="beanA" method="methodA" fixed-delay="5000" initial-delay="1000" />
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<task:scheduled ref="beanB" method="methodB" fixed-rate="5000" />
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<task:scheduled ref="beanC" method="methodC" cron="*/5 * * * * MON-FRI" />
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</task:scheduled-tasks>
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</beans>

‎spring-all/src/main/resources/springScheduled.properties‎

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cron.expression=0 15 10 15 * ?
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fixedRate.in.millisecons=1000
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fixedDelay.in.millisecons=1000

‎spring-all/src/test/java/org/baeldung/scheduling/ScheduledAnnotationExampleTest.java‎

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package org.baeldung.scheduling;
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import org.baeldung.scheduling.SpringSchedulingConfig;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import org.springframework.test.context.ContextConfiguration;
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import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
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import org.springframework.test.context.support.AnnotationConfigContextLoader;
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@RunWith(SpringJUnit4ClassRunner.class)
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@ContextConfiguration(classes = { SpringSchedulingConfig.class }, loader = AnnotationConfigContextLoader.class)
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public class ScheduledAnnotationExampleTest {
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@Test
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public void testScheduledAnnotation() throws InterruptedException {
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Thread.sleep(20000);
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}
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}

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