Java 将JobLaunchingGateway与spring批处理和spring集成一起使用引发DestinationResolutionException

我想定期扫描目录以查找与特定模式匹配的文件，并为找到的文件启动作业

@Configuration
@EnableBatchProcessing
public class BatchConfiguration {

    private final JobBuilderFactory jobBuilderFactory;
    private final StepBuilderFactory stepBuilderFactory;

    @Autowired
    public BatchConfiguration(final JobBuilderFactory jobBuilderFactory, final StepBuilderFactory stepBuilderFactory) {
        this.jobBuilderFactory = jobBuilderFactory;
        this.stepBuilderFactory = stepBuilderFactory;
    }

    @Bean
    public FileMessageToJobRequest fileMessageToJobRequestTransformer(final Job myJob) {
        return new FileMessageToJobRequest(myJob, "input.file.name");
    }

    @Bean
    public MessageSource<File> fileMessageSource() {
        final FileReadingMessageSource fileReadingMessageSource = new FileReadingMessageSource();
        fileReadingMessageSource.setDirectory(directory));
        fileReadingMessageSource.setFilter(new CompositeFileListFilter<>(Arrays.asList(
                new AcceptOnceFileListFilter<>(),
                new SimplePatternFileListFilter(pattern)
        )));
        return fileReadingMessageSource;
    }

    @Bean
    public IntegrationFlow pollingFlow(final FileMessageToJobRequest fileMessageToJobRequest, final JobLaunchingGateway jobLaunchingGateway) {
        return IntegrationFlows.from(fileMessageSource(),
                c -> c.poller(Pollers.fixedDelay(10, TimeUnit.SECONDS)))
                .transform(fileMessageToJobRequest)
                .handle(jobLaunchingGateway)
                .get();
    }

    @Bean
    public JobLaunchingGateway jobLaunchingGateway(final JobLauncher jobLauncher) {
        return new JobLaunchingGateway(jobLauncher);
    }

    // Step definition omitted for readability

    @Bean(name = "myJob")
    public Job myJob(final JobCompletionNotificationListener listener, final @Qualifier("step1") Step step) {
        return jobBuilderFactory.get("myJob")
                .preventRestart()
                .incrementer(new RunIdIncrementer())
                .listener(listener)
                .flow(myStep)
                .end()
                .build();
    }
}

---

执行作业后，如何停止将

JobLaunchingGateway

消息发布到输出通道？

这是因为

JobLaunchingGateway

是Request/reply组件，它需要

outputChannel

或

replyChannel

头。同时，您的配置中只有以下内容：

 .handle(jobLaunchingGateway)
 .get();

如果您对那里的回复不感兴趣，您可以在最后添加以下内容：

 .handle(jobLaunchingGateway)
 .channel("nullChannel")
 .get();

---

伟大的我已经用ServiceActivator试过了，不知道也可以从流中完成。谢谢。如果您不想等待作业结果，还可以使用

JobLaunchingMessageHandler

。因此

JobLaunchingGateway

是一个合适的

MessageHandler

，它在返回

JobExecution

之前简单地委托给

JobLaunchingMessageHandler

？直接调用处理程序似乎是一个更好的主意，谢谢你的提示。

JobLaunchingMessageHandler

只是一个POJO，从消息传递中释放出来，但它仍然是Request/reply，你会得到相同的

无输出通道或replyChannel

错误：

 .handle(jobLaunchingGateway)
 .channel("nullChannel")
 .get();