Spring Batch를 통해 1~100까지 로그로 출력하기
package batch.practice.job;
import org.springframework.batch.core.Job;
import org.springframework.batch.core.Step;
import org.springframework.batch.core.configuration.annotation.JobBuilderFactory;
import org.springframework.batch.core.configuration.annotation.StepBuilderFactory;
import org.springframework.batch.repeat.RepeatStatus;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
@Slf4j //log 사용을 위한 lombok annotation
@RequiredArgsConstructor //생성자 DI를 위한 lombok annotation
@Configuration //Spring batch의 Job은 @Configuration annotation으로 등록 후 사용
public class SimpleJobConfiguration002 {
private final JobBuilderFactory jobBuilderFactory;
private final StepBuilderFactory stepBuilderFactory;
@Bean
public Job simpleJob1() {
log.info("========== START simpleJob");
return jobBuilderFactory.get("simpleJob1") //Batch Job을 생성하고 builder를 통해 이름 지정
.start(simpleStep1()) //execute 할 step or sequence of steps
.build();
};
@Bean
public Step simpleStep1() {
return stepBuilderFactory.get("simpleStep1") //Batch Step을 생성하고 builder를 통해 이름 지정
.tasklet((contribution, chunkContext) -> { //Step 안에서 수행될 기능을 명시
for(int i = 0; i < 100 ; i ++) { // - Tasklet은 Step 안에서 단일로 수행될 커스텀 기능 선언
log.info(">>>>> "+(i+1)+" <<<<<");
}
return RepeatStatus.FINISHED;
})
.build();
};
};
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.4.5)
2021-04-27 13:42:11.560 INFO 27484 --- [ restartedMain] b.p.BatchExample210427001Application : Starting BatchExample210427001Application using Java 15.0.2 on DESKTOP-C7P9M2O with PID 27484 (-)
2021-04-27 13:42:11.564 INFO 27484 --- [ restartedMain] b.p.BatchExample210427001Application : No active profile set, falling back to default profiles: default
2021-04-27 13:42:11.642 INFO 27484 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable
2021-04-27 13:42:12.367 INFO 27484 --- [ restartedMain] b.p.job.SimpleJobConfiguration002 : ========== START simpleJob
2021-04-27 13:42:12.583 INFO 27484 --- [ restartedMain] o.s.b.d.a.OptionalLiveReloadServer : LiveReload server is running on port 35729
2021-04-27 13:42:12.605 INFO 27484 --- [ restartedMain] b.p.BatchExample210427001Application : Started BatchExample210427001Application in 1.483 seconds (JVM running for 3.024)
2021-04-27 13:42:12.607 INFO 27484 --- [ restartedMain] o.s.b.a.b.JobLauncherApplicationRunner : Running default command line with: []
2021-04-27 13:42:12.608 WARN 27484 --- [ restartedMain] o.s.b.c.c.a.DefaultBatchConfigurer : No datasource was provided...using a Map based JobRepository
2021-04-27 13:42:12.608 WARN 27484 --- [ restartedMain] o.s.b.c.c.a.DefaultBatchConfigurer : No transaction manager was provided, using a ResourcelessTransactionManager
2021-04-27 13:42:12.628 INFO 27484 --- [ restartedMain] o.s.b.c.l.support.SimpleJobLauncher : No TaskExecutor has been set, defaulting to synchronous executor.
2021-04-27 13:42:12.662 INFO 27484 --- [ restartedMain] o.s.b.c.l.support.SimpleJobLauncher : Job: [SimpleJob: [name=simpleJob1]] launched with the following parameters: [{}]
2021-04-27 13:42:12.700 INFO 27484 --- [ restartedMain] o.s.batch.core.job.SimpleStepHandler : Executing step: [simpleStep1]
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2021-04-27 13:42:12.727 INFO 27484 --- [ restartedMain] o.s.batch.core.step.AbstractStep : Step: [simpleStep1] executed in 27ms
2021-04-27 13:42:12.735 INFO 27484 --- [ restartedMain] o.s.b.c.l.support.SimpleJobLauncher : Job: [SimpleJob: [name=simpleJob1]] completed with the following parameters: [{}] and the following status: [COMPLETED] in 42ms
사실 1개의 step에서 for문을 이용하여 1~100까지 출력하는 방식이 아니라
job이 작동하면 step을 100개 생성해서 각각 1~100까지 출력하게 만들고 싶었다.
이 생각이 틀렸는지 더 공부해서 만약 가능하다면 시도해봐야겠다!!
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