Spring Task Scheduler XML Configuration
March 08, 2023
<task:scheduled-tasks> XML element. Scheduler method can also be created using @Scheduled annotation that can be enabled by JavaConfig as well as XML configuration. To enable @Scheduled annotation using XML configuration, we need to use <task:annotation-driven> XML element and in JavaConfig we need to use @EnableScheduling annotation.
1. Scheduling tasks using XML configuration
<beans> <task:scheduler id="taskScheduler" pool-size="10"/> <bean id="bookApp" class="com.concretepage.BookApp"/> <task:scheduled-tasks scheduler="taskScheduler"> <task:scheduled ref="bookApp" method="cleanDustOne" fixed-rate="2000"/> <task:scheduled ref="bookApp" method="cleanDustTwo" fixed-rate="3000"/> </task:scheduled-tasks> </beans>
ThreadPoolTaskScheduler with a given pool size.
<task:scheduled-tasks> : It groups
<task:scheduled> element.
<task:scheduled> : It defines method which is scheduled on fixed rate.
2. Enabling @Scheduled Annotation with XML Configuration
<beans> <task:scheduler id="taskScheduler" pool-size="10"/> <task:annotation-driven scheduler="taskScheduler"/> <bean id="bookApp" class="com.concretepage.BookApp"/> </beans>
@Scheduled methods to be scheduled on fixed rate.
Now we will discuss here complete example.
Technologies Used
Find the technologies being used in our example.1. Java
2. Spring
3. Gradle
Gradle Dependencies
dependencies {
compile 'org.springframework.boot:spring-boot-starter:1.2.7.RELEASE'
}
Create Scheduler Methods
Create a class with some methods that will be scheduled by XML configuration.BookApp.java
package com.concretepage;
import org.springframework.scheduling.annotation.Scheduled;
public class BookApp {
public void cleanDustOne() {
System.out.println("Executing cleanDustOne method...");
}
public void cleanDustTwo() {
System.out.println("Executing cleanDustTwo method...");
}
@Scheduled(fixedRate=1000)
public void arrangeBook(){
System.out.println("Arranging Book...");
}
}
cleanDustOne and cleanDustTwo will be scheduled using <task:scheduled-tasks> XML element.
2. The method
arrangeBook will be scheduled using @Scheduled annotation and the @Scheduled annotation will be enabled by <task:annotation-driven/> element.
XML Configuration
Find the scheduler XML configurations.application-context.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context" xmlns:task="http://www.springframework.org/schema/task"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd
http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-4.1.xsd">
<beans>
<task:scheduler id="taskScheduler" pool-size="10"/>
<task:annotation-driven scheduler="taskScheduler"/>
<bean id="bookApp" class="com.concretepage.BookApp"/>
<task:scheduled-tasks scheduler="taskScheduler">
<task:scheduled ref="bookApp" method="cleanDustOne" fixed-rate="2000"/>
<task:scheduled ref="bookApp" method="cleanDustTwo" fixed-rate="3000"/>
</task:scheduled-tasks>
</beans>
</beans>
Run Demo Application
XMLConfigSpringDemo.java
package com.concretepage;
import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class XMLConfigSpringDemo {
public static void main(String[] args) {
AbstractApplicationContext context = new ClassPathXmlApplicationContext("application-context.xml");
}
}
Arranging Book... Executing cleanDustOne method... Arranging Book... Executing cleanDustTwo method... Arranging Book...
