CODEWITHSUNDEEP
javaspringmaventomcatschedule
user2023141
user2023141

Reputation: 1223

SpringBoot @Scheduled doesn't work

I have a very simple web application for testing the @Scheduled annotation. The method read() in the class RetrievePrices is annotated with @Scheduled . After deploying the war on Tomcat, I was expecting that the read method should be executed every 5 seconds, but nothing is displayed in the Tomcat console.

The Main SpringBoot class

package com.aaaa.main;

import org.springframework.batch.core.configuration.annotation.EnableBatchProcessing;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.scheduling.annotation.EnableScheduling;

@SpringBootApplication
public class BatchMain {

    public static void main(String[] args) {

        SpringApplication.run(BatchMain.class, args);
    }

}

The Class whith a method annotated with @Scheduled

package com.aaaa.schedule;

import org.springframework.scheduling.annotation.Scheduled;

public class RetrievePrices {

    @Scheduled(fixedRate = 5000)
    public void read() {

        System.out.println(" *************  Scheduled(fixedRate = 5000) ");
}

A very simple Spring Configuration Class

package com.aaaa.config;

@Configuration
@ComponentScan("com.aaaa")
@EnableScheduling
public class MyConfiguration {
}

The POM

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.10.RELEASE</version>
    </parent>
    <artifactId>batch</artifactId>
    <name>Batch processes</name>
    <packaging>war</packaging>

    <properties>
        <java.version>1.8</java.version>
        <Postgres.version>9.4-1200-jdbc41</Postgres.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-batch</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>true</optional>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>    
</project>

The updated class RetrievePrices 

package com.aaaa.schedule;

import javax.annotation.PostConstruct;

import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;

@Component
public class RetrievePrices {

    @Scheduled(fixedRate = 5000)
    public void read() {

        System.out.println(" *************  into @Scheduled(fixedRate = 5000) ");
    }

    @PostConstruct
    public void postConstruct() {
        System.out.println(" *************  postConstruct ************** ");
    }
}

Upvotes: 10

Views: 24557

Answers (4)

lyrio
lyrio

Reputation: 288

If you use springBoot 2.4.x (Spring 5 version), to get @Scheduled to work, you will have to define its method in a seperate file class from the @SpringBootApplication file annotated class. The new class must be a component, so must be annotated with @Component, also add the annotation @EnableScheduling at the same class level, for the all thing to work. Hope this helped.

Upvotes: 5

Pradeep Naik
Pradeep Naik

Reputation: 51

Creating a Simple Scheduler in SpringBoot (Working Code)

  1. Application Class

    package com.springboot.test;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.scheduling.annotation.EnableScheduling;

@EnableScheduling
@SpringBootApplication
public class TestApplication {

public static void main(String[] args) {
    SpringApplication.run(TestApplication.class, args);
}
}

  2. Controller Class

    package com.springboot.test;

import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class SchedulerTest {

    @Scheduled(fixedRate=2000)
    public void name() {
    System.out.println("HI");   
        }
}

  3. pom.xml

    <?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>

<groupId>com.springboot</groupId>
<artifactId>test</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>test</name>
<description>Demo project for Spring Boot</description>

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.4.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.8</java.version>
</properties>

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>
</project>

This Simple test code is Working for me.

Upvotes: 5

Kinglee
Kinglee

Reputation: 53

I encountered a similar issue and I felt like I should mention what worked for me, it might help someone else.

I added @EnableScheduling, the component scan was fine, sources checked out fine but there was one issue, the project was an inherited groovy project and I did not know that I needed to mark my project source folder as 'sources root' in intellij, this is not necessary in java projects in intellij. So if you have done everything you might need to check your build tool or IDE to make sure that your sources root is marked appropriately.

Upvotes: 2

Urosh T.
Urosh T.

Reputation: 3814

Your RetrievePrices class does not have any sort of annotation to get picked up by the Spring scanning. Add @Component annotation for example and it should run fine.

Example:

@SpringBootApplication(scanBasePackages = { "com.aaaa" })
@EnableScheduling
public class BootApplication {

//
}

Upvotes: 9

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