java - Spring Batch (modular=true) 创建作业配置 bean 两次

Question

@Configuration
@EnableBatchProcessing(modular=true)
public class ModularJobConfiguration {

    @Bean
    public ApplicationContextFactory job() {
        return new GenericApplicationContextFactory(FlatfileToDbJobConfiguration.class);
    }

    @Bean
    public ApplicationContextFactory anotherJob() {
        return new GenericApplicationContextFactory(FlatfileToDbJobAnotherConfiguration.class);
    }

}

例如仅显示一个配置，另一个像这样。

@Configuration
public class FlatfileToDbJobConfiguration {

        @Autowired
        private JobBuilderFactory jobBuilders;

        @Autowired
        private StepBuilderFactory stepBuilders;

        @Bean
        public Job flatfileToDbJob(){
            return jobBuilders.get("flatfileToDbJob")
                    .listener(protocolListener())
                    .start(step())
                    .build();
        }

        @Bean
        public Step step(){
            return stepBuilders.get("step")
                    .<Partner,Partner>chunk(1)
                    .reader(reader())
                    .processor(processor())
                    .writer(writer())
                    .build();
        }

        // ...
        // rest part of code
        // ...
}

一切正常，但配置文件中的所有 bean 方法都会调用两次。我认为，首先是在共同背景下，其次是在个人背景下。正常吗？我不能使用后置构造，因为它会调用两次。如何让 module=true 并且只有一个 bean 初始化？谢谢!

Answer 1

我找到了答案。我需要@Lazy初始化。然后配置将初始化，然后创建单独的上下文。

@Configuration
@Lazy
public class FlatfileToDbJobConfiguration {

        @Autowired
        private JobBuilderFactory jobBuilders;

        @Autowired
        private StepBuilderFactory stepBuilders;

        @Bean
        public Job flatfileToDbJob(){
            return jobBuilders.get("flatfileToDbJob")
                    .listener(protocolListener())
                    .start(step())
                    .build();
        }

        @Bean
        public Step step(){
            return stepBuilders.get("step")
                    .<Partner,Partner>chunk(1)
                    .reader(reader())
                    .processor(processor())
                    .writer(writer())
                    .build();
        }

        // ...
        // rest part of code
        // ...
}