[springBoot] spring batch jsonFileItemWriter

목차

아래 포스팅에서 이어진 내용입니다.

[springBoot] spring batch FlatFileItemWriter

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객체의 데이터를 읽어서 json 형식의 데이터로 변환하는 예제

Writer부분만 다르다.

JonTestConfig

package com.dev.lsy.springbatchremind.batch;

import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.batch.core.ExitStatus;
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.JobScope;
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.batch.item.ItemReader;
import org.springframework.batch.item.ItemWriter;
import org.springframework.batch.item.file.builder.FlatFileItemWriterBuilder;
import org.springframework.batch.item.json.JacksonJsonObjectMarshaller;
import org.springframework.batch.item.json.builder.JsonFileItemWriterBuilder;
import org.springframework.batch.item.support.ListItemReader;
import org.springframework.batch.repeat.RepeatStatus;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.FileSystemResource;

import java.util.Arrays;
import java.util.List;

@Slf4j
@RequiredArgsConstructor
@Configuration
public class JobTestConfig {

    private final JobBuilderFactory jobBuilderFactory;
    private final StepBuilderFactory stepBuilderFactory;

    @Bean
    //job
    public Job job1() {
        return jobBuilderFactory.get("job1")
                //jobParameter 자동 증감
                .incrementer(new RunIdIncrementer())
                .start(step1())
                .build();
    }

    @Bean
    //step
    public Step step1() {
        return stepBuilderFactory.get("step1")
                //chunk 기반 작업
                .<Person, Person>chunk(10)
                .reader(customReader())
                .writer(customWriter())
                .build();
    }

    //reader
    @Bean
    public ListItemReader customReader() {

        //테스트 리스트(여기는 동일)
        List<Person> list = Arrays.asList(
                new Person(1L, "아이언맨", 51),
                new Person(2L, "토르", 10000),
                new Person(3L, "헐크", 52)
            );
        ListItemReader<Person> reader = new ListItemReader<>(list);

        return reader;
    }

    @Bean
    //여기만 다르다. json으로 쓰겠다.
    public ItemWriter<? super Person>  customWriter() {
        return new JsonFileItemWriterBuilder<Person>()
                .name("jsonFileWriter")
                //스프링 배치 기본 마샬러 이용
                .jsonObjectMarshaller(new JacksonJsonObjectMarshaller<>())
                .resource(new FileSystemResource("output/result.json"))
                .build();
    }
}

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개인 스터디 기록을 메모하는 공간이라 틀린점이 있을 수 있습니다.

틀린 점 있을 경우 댓글 부탁드립니다.

reference: https://www.inflearn.com/course/%EC%8A%A4%ED%94%84%EB%A7%81-%EB%B0%B0%EC%B9%98

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다음 내용

[springBoot] spring batch flowJob (feat.simpleFlow)