/* * Copyright 2016-2019 the original author or authors. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * https://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package io.spring.cloud; import java.util.Arrays; import java.util.List; import org.springframework.batch.core.Job; import org.springframework.batch.core.Step; import org.springframework.batch.core.StepContribution; 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.scope.context.ChunkContext; import org.springframework.batch.core.step.tasklet.Tasklet; import org.springframework.batch.item.ItemProcessor; import org.springframework.batch.item.ItemWriter; import org.springframework.batch.item.support.ListItemReader; import org.springframework.batch.repeat.RepeatStatus; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.task.configuration.EnableTask; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; @EnableTask @SpringBootApplication @EnableBatchProcessing public class BatchEventsApplication { public static void main(String[] args) { SpringApplication.run(BatchEventsApplication.class, args); } @Configuration public static class JobConfiguration { private static final int DEFAULT_CHUNK_COUNT = 3; @Autowired private JobBuilderFactory jobBuilderFactory; @Autowired private StepBuilderFactory stepBuilderFactory; @Bean public Step step1() { return this.stepBuilderFactory.get("step1") .tasklet(new Tasklet() { @Override public RepeatStatus execute(StepContribution contribution, ChunkContext chunkContext) throws Exception { System.out.println("Tasklet has run"); return RepeatStatus.FINISHED; } }).build(); } @Bean public Step step2() { return this.stepBuilderFactory.get("step2") .<String, String>chunk(DEFAULT_CHUNK_COUNT) .reader(new ListItemReader<>(Arrays.asList("1", "2", "3", "4", "5", "6"))) .processor(new ItemProcessor<String, String>() { @Override public String process(String item) throws Exception { return String.valueOf(Integer.parseInt(item) * -1); } }) .writer(new ItemWriter<String>() { @Override public void write(List<? extends String> items) throws Exception { for (String item : items) { System.out.println(">> " + item); } } }).build(); } @Bean public Job job() { return this.jobBuilderFactory.get("job") .start(step1()) .next(step2()) .build(); } } }