Question

我的班级是一名sftp投手。它实现DirectoryListener并实现fileAdded方法以监视何时将新事件添加到sftp目录。代码看起来像

    @SpringBootApplication
    @Slf4j
    public class SftpBridge implements DirectoryListener, IoErrorListener, InitialContentListener {
        @Autowired
        private SftpBridgeConfig config;

        @Autowired
        public SftpDirectory sftpDirectory;

        public static void main(final String[] args) throws Exception {
            SpringApplication.run(SftpBridge.class, args);
        }

        @PostConstruct
        public void postConstruct() {
            LOG.info("Initializing...");

            initialize();

            LOG.info("Initialized!");
        }

        private void initialize() {
            pollSftp();
        }

public void pollSftp() {
    try {
        while (true) {

            LOG.info("monitoring directory: " + "/");
            PolledDirectory polledDirectory = sftpDirectory;

            DirectoryPoller dp = DirectoryPoller.newBuilder()
                    .addPolledDirectory(polledDirectory)
                    .addListener(new SftpBridge())
                    // other settings

                    //remove this later
                    .enableFileAddedEventsForInitialContent() // optional (disabled by default). FileAddedEvents fired for directories initial content.

                    //TODO: enable later for subdirectory polling
                    //.enableParallelPollingOfDirectories() // optional (disabled by default).

                    .setDefaultFileFilter(new RegexFileFilter(".*csv")) // optional. Only consider files ending with "xml".
                    .setThreadName("sftp-poller") // sets the name of the the polling thread
                    .setPollingInterval(10, TimeUnit.SECONDS)
                    .start();

            TimeUnit.HOURS.sleep(2);

            dp.stop();

        }
    } catch (final Exception e) {
        LOG.error("Error monitoring ftp host", e);
    }
}

由于在Spring启动应用程序初始化期间由initialize（）调用pollSftp（），因此可以看到@Autowired组件SftpBridgeConfig配置。

我的问题是我的类实现了DirectoryListener，我必须覆盖fileAdded事件，以便在添加新的ftp文件时采取一些操作。

    @Override
public void fileAdded(FileAddedEvent event) {
    LOG.info("Added: " + event.getFileElement());
//implementing DirectoryListener
//@Autowired component config is null here as it is called from a polling thread

}

在fileAdded（FileAddedEvent事件）方法中，我的@Autowired组件配置为null，因为在Spring boot init期间不调用此方法。构造代码的最佳方法是什么，以便在sftp目录轮询线程调用fileAdded（）时@Autowired组件配置可用？

感谢您的任何建议。

编辑：@Andreas - 我已经填写了pollSftp（）方法，该方法将该类添加为DirectoryListener。感谢

Answer 1

SftpBridgeConfig中是否有注释？比照@Service @Component

如果是配置类，需要在spring上下文中注册@Bean。比照@Bean（name =＆＃34;＆＃34;）或@Bean

ex）消息源配置

@Configuration
public class MessageSourceConfiguration { 

    @Bean
    public MessageSource messageSource() {
      // statements
    }
}

@Autowired组件不可用

1 个答案: