无法在春季批处理中启动Asyc作业

Question

我想做一个rest服务，它可以异步调用Spring Batch，这样我就可以一次开始工作，它可以在后台运行，并且可以关闭HTTP连接。

我正在使用JobOperator通过以下配置启动作业：

@Bean
    public JobLauncher jobLauncher() {
        SimpleJobLauncher jobLauncher = new SimpleJobLauncher();
        jobLauncher.setJobRepository(jobRepository);
        SimpleAsyncTaskExecutor simpleAsyncTaskExecutor = new SimpleAsyncTaskExecutor();
        simpleAsyncTaskExecutor.setConcurrencyLimit(10);
        jobLauncher.setTaskExecutor(simpleAsyncTaskExecutor);
        return jobLauncher;
    }


    @Bean
    public JobOperator jobOperator() {
        SimpleJobOperator jobOperator = new SimpleJobOperator();
        jobOperator.setJobExplorer(jobExplorer);
        jobOperator.setJobLauncher(jobLauncher());
        jobOperator.setJobRegistry(jobRegistry);
        jobOperator.setJobRepository(jobRepository);
        return  jobOperator;
    };

通过上述配置，我无法按自己的方式启动作业。 在这里我读到我们可以在不同的线程中启动作业，但是没有观察到。 任何想法为什么会观察到这种行为？

Answer 1

最后，我找到了解决方案。 问题出在bean的声明中。 JobLauncher bean被spring batch的默认实现所覆盖。 我做了以下重命名，并且按预期工作：

@Bean
public SimpleJobLauncher simpleJobLauncher() {
    SimpleJobLauncher jobLauncher = new SimpleJobLauncher();
    jobLauncher.setJobRepository(jobRepository);
    jobLauncher.setTaskExecutor(simpleAsyncTaskExecutor());
    return jobLauncher;
}

public SimpleAsyncTaskExecutor simpleAsyncTaskExecutor() {
    SimpleAsyncTaskExecutor simpleAsyncTaskExecutor = new SimpleAsyncTaskExecutor();
    simpleAsyncTaskExecutor.setConcurrencyLimit(10);
    return simpleAsyncTaskExecutor;
}

@Bean
public JobOperator jobOperator() {
    SimpleJobOperator jobOperator = new SimpleJobOperator();
    jobOperator.setJobLauncher(simpleJobLauncher());
    jobOperator.setJobExplorer(jobExplorer);
    jobOperator.setJobRegistry(jobRegistry);
    jobOperator.setJobRepository(jobRepository);
    return  jobOperator;
};