I need write simple app on spring batch. I have config + job + step structure. And inside step I use tasklet. The problem is: tasklet's execute() method never called. The program runs job -> step -> create tasklet and that's all. A found many examples, which I used for that code writing, and I can't understand, what I'm doing wrong.
My code:
import org.springframework.batch.core.Job;
import org.springframework.batch.core.Step;
import org.springframework.batch.core.configuration.annotation.EnableBatchProcessing;
import org.springframework.batch.core.configuration.annotation.JobBuilderFactory;
import org.springframework.batch.core.configuration.annotation.StepBuilderFactory;
import org.springframework.batch.core.configuration.annotation.StepScope;
import org.springframework.batch.core.launch.support.RunIdIncrementer;
import org.springframework.batch.core.step.tasklet.Tasklet;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Scope;
@Configuration
@EnableBatchProcessing
public class BatchConfiguration {
@Autowired
private JobBuilderFactory jobBuilderFactory;
@Autowired
private StepBuilderFactory stepBuilderFactory;
@Bean
public Step step1() {
return stepBuilderFactory.get("step1")
.tasklet(new DemoTasklet())
.build();
}
@Bean
public Job job() throws Exception {
return jobBuilderFactory.get("job1")
.incrementer(new RunIdIncrementer())
.flow(step1())
.end()
.build();
}
}
Tasklet code:
import org.springframework.batch.core.ExitStatus;
import org.springframework.batch.core.StepContribution;
import org.springframework.batch.core.StepExecution;
import org.springframework.batch.core.StepExecutionListener;
import org.springframework.batch.core.configuration.annotation.StepScope;
import org.springframework.batch.core.scope.context.ChunkContext;
import org.springframework.batch.core.step.tasklet.Tasklet;
import org.springframework.batch.repeat.RepeatStatus;
public class DemoTasklet implements Tasklet, StepExecutionListener {
public DemoTasklet() {
System.out.println("demo tasklet constructor");
}
@Override
public RepeatStatus execute(StepContribution stepContribution, ChunkContext chunkContext) throws Exception {
System.out.println("hello");
return RepeatStatus.FINISHED;
}
@Override
public void beforeStep(StepExecution stepExecution) {
System.out.println("before");
}
@Override
public ExitStatus afterStep(StepExecution stepExecution) {
System.out.println("after");
return stepExecution.getExitStatus();
}
}
And also main class:
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class Main {
public static void main(String args[]) {
System.out.println(3);
SpringApplication.run(BatchConfiguration.class, args);
System.out.println(4);
}
}
Please, say what is wrong, and how I should fix it.