#11 spring batch: FlowJob api - start(), next()

spring-batch/basic/src/main/java/io/springbatch/basic/flow/FlowJobConfiguration.java

@@ -10,7 +10,7 @@ import org.springframework.batch.repeat.RepeatStatus;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 
-@Configuration
+//@Configuration
 @RequiredArgsConstructor
 public class FlowJobConfiguration {
 

spring-batch/basic/src/main/java/io/springbatch/basic/flow/StartNextConfiguration.java

@@ -0,0 +1,121 @@
+package io.springbatch.basic.flow;
+
+import lombok.RequiredArgsConstructor;
+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.core.job.builder.FlowBuilder;
+import org.springframework.batch.core.job.flow.Flow;
+import org.springframework.batch.core.launch.support.RunIdIncrementer;
+import org.springframework.batch.repeat.RepeatStatus;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+@RequiredArgsConstructor
+public class StartNextConfiguration {
+
+    private final JobBuilderFactory jobBuilderFactory;
+    private final StepBuilderFactory stepBuilderFactory;
+
+    /*
+        이 구성은 Step 을 Flow 별로 분리하여 구성하는 장점은 있지만
+        Step 중 하나라도 실패할 경우 전체 Job 이 실패하는 규칙은 동일
+
+        flowA (step1 -> step2) -> step3 -> flowB (step4 -> step5) -> step6
+    */
+    @Bean
+    public Job batchJob() {
+        return jobBuilderFactory.get("batchJob")
+                .incrementer(new RunIdIncrementer())
+                .start(flowA())
+                .next(step3())
+                .next(flowB())
+                .next(step6())
+                .end()
+                .build();
+    }
+
+    @Bean
+    public Flow flowA() {
+        FlowBuilder<Flow> flowBuilder = new FlowBuilder<>("flowA");
+        flowBuilder
+                .start(step1())
+                .next(step2())
+                .end();
+
+        return flowBuilder.build();
+    }
+
+    @Bean
+    public Flow flowB() {
+        FlowBuilder<Flow> flowBuilder = new FlowBuilder<>("flowB");
+        flowBuilder
+                .start(step4())
+                .next(step5())
+                .end();
+
+        return flowBuilder.build();
+    }
+
+    @Bean
+    public Step step1() {
+        return stepBuilderFactory.get("step1")
+                .tasklet((contribution, chunkContext) -> {
+                    System.out.println("step1 was executed");
+                    return RepeatStatus.FINISHED;
+                })
+                .build();
+    }
+
+    @Bean
+    public Step step2() {
+        return stepBuilderFactory.get("step2")
+                .tasklet((contribution, chunkContext) -> {
+                    System.out.println("step2 was executed");
+                    return RepeatStatus.FINISHED;
+                })
+                .build();
+    }
+
+    @Bean
+    public Step step3() {
+        return stepBuilderFactory.get("step3")
+                .tasklet((contribution, chunkContext) -> {
+                    System.out.println("step3 was executed");
+                    return RepeatStatus.FINISHED;
+                })
+                .build();
+    }
+
+    @Bean
+    public Step step4() {
+        return stepBuilderFactory.get("step4")
+                .tasklet((contribution, chunkContext) -> {
+                    System.out.println("step4 was executed");
+                    return RepeatStatus.FINISHED;
+                })
+                .build();
+    }
+
+    @Bean
+    public Step step5() {
+        return stepBuilderFactory.get("step5")
+                .tasklet((contribution, chunkContext) -> {
+                    System.out.println("step5 was executed");
+                    return RepeatStatus.FINISHED;
+                })
+                .build();
+    }
+
+    @Bean
+    public Step step6() {
+        return stepBuilderFactory.get("step6")
+                .tasklet((contribution, chunkContext) -> {
+                    System.out.println("step6 was executed");
+                    return RepeatStatus.FINISHED;
+                })
+                .build();
+    }
+}