如何在Spring批处理中创建动态步骤
我需要创建“N”个步骤,这取决于从数据库接收的“maxHierLevel”值,并按顺序执行-如何在Spring批处理中创建动态步骤,spring,spring-batch,Spring,Spring Batch,我需要创建“N”个步骤,这取决于从数据库接收的“maxHierLevel”值,并按顺序执行- int maxHierLevel = testService.getHighestLevel(); Step masterCalculationStep = stepBuilderFactory.get("CALCUL_STEP_1") .<Map<Long, List<CostCalculation>>, List<TempCostCalc>
int maxHierLevel = testService.getHighestLevel();
Step masterCalculationStep = stepBuilderFactory.get("CALCUL_STEP_1")
.<Map<Long, List<CostCalculation>>, List<TempCostCalc>>chunk(1)
.reader(reader)
.processor(processor)
.writer(writer)
.build();
final Step[] stepsArray = new Step[maxHierLevel];
for (int i = 0; i < stepsArray.length; i++) {
stepsArray [i] = stepBuilderFactory.get("processingRecordsInLevel_"+i)
.partitioner("partitionningSlavStep_"+i , calculationPartioner(i))
.step(masterCalculationStep)
.listener(new StepResultListener())
.taskExecutor(taskExecutor)
.build();
}
return jobBuilderFactory.get("mainCalculationJob")
.incrementer(new RunIdIncrementer())
.flow(truncTableTaskletStep())
.next(loadPlantList)
.next(stepsArray[0])
.next(stepsArray[1])
.next(stepsArray[2])
.end()
.listener(listener)
.build();
我们是否可以动态添加步骤,如nextstepsArray[0]并返回作业引用?是的,您可以动态创建步骤并返回作业引用。以下是在您的案例中如何做到这一点的示例:
@Bean
public Job job() {
Step[] stepsArray = // create your steps array or pass it as a parameter
SimpleJobBuilder jobBuilder = jobBuilderFactory.get("mainCalculationJob")
.incrementer(new RunIdIncrementer())
.start(truncTableTaskletStep());
for (Step step : stepsArray) {
jobBuilder.next(step);
}
return jobBuilder.build();
}
希望这能有所帮助。您知道如何使这些步骤具有上下文意识吗。例如,他们可以使用@BeforeStep annotation?@MahmoudBenHassine感谢您证明了将步骤动态添加到批处理作业的解决方案,我有额外的用例并行运行任何输入都可以吗?