Simplified Guide to Using Tasklet in Spring Batch with Spring Boot

How to Use Tasklet in Spring Batch with Spring Boot

If you’re working on Spring Batch and looking for a simple way to define your job logic, Tasklet is the perfect choice. In this post, we’ll walk through what a Tasklet is, when to use it, and how to implement it using Spring Boot 3+ and Spring Batch 5+.

📌 What Is a Tasklet?

A Tasklet is a functional interface in Spring Batch that allows you to perform a single task inside a step. Think of it as a method that gets called once per execution and finishes with a status like RepeatStatus.FINISHED.

✅ When Should You Use Tasklets?

  • When your step logic is simple or one-off (e.g. cleaning temp files, sending emails, etc.)
  • When you don’t need chunk-based processing
  • For quick validations, archiving, logging, or calling APIs

🧱 Maven Dependency

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

⚙️ Create a Tasklet

Here’s how you can define a tasklet using a lambda expression (supported in Spring Batch 5.x):


 @Bean
    public Step taskletStep() {
        return new StepBuilder("sample-tasklet-step",repository)
                .tasklet((contribution, chunkContext) -> {
                    System.out.println("Executing tasklet logic");
                    return RepeatStatus.FINISHED;
                },platformTransactionManager).build();
    }

🧩 Job Configuration


  @Bean
    public Job taskletJob() {
        return new JobBuilder("sample-job",repository).incrementer(new RunIdIncrementer())
                .start(taskletStep())
                .build();
    }

🚀 Output

When you run the application, you should see:

Executing Tasklet logic...

💡 Tips

  • Use PlatformTransactionManager explicitly with Spring Batch 5+
  • Lambda-based tasklets are cleaner and easier to read
  • Use Tasklet when your logic is short and single-pass

🎯 Conclusion

Tasklet is a powerful but lightweight way to define your step logic in Spring Batch. It’s ideal for quick, one-time operations that don’t require chunking.

⚙️ Related Spring Batch Tasklet & Execution Guides

Understand when to use Tasklet-based steps by exploring related Spring Batch concepts such as chunk processing, error handling, job flow control, and performance optimization.

🧱 Spring Batch Core Components

Learn how Tasklet fits into the Spring Batch architecture alongside chunk-oriented processing.

🔄 ItemProcessor Example

Compare Tasklet-based processing with ItemProcessor-driven chunk-based batch jobs.

🚫 Skip Policy & Error Handling

Handle failures and exceptions inside Tasklet execution using fault-tolerant strategies.

🔁 Retry Mechanism

Implement retry logic for transient errors occurring inside Tasklet-based steps.

🔀 Conditional Flow in Jobs

Control job execution paths based on Tasklet exit status and execution results.

🧵 Multithreaded Step

Learn when multithreaded chunk processing is a better alternative than Tasklets.

👂 JobExecutionListener

Track Tasklet execution outcomes using job and step lifecycle listeners.