Spring FTP Integration should look for modified file with same name

Question

I am using FileSystemPersistentAcceptOnceFileListFilter and PropertiesPersistingMetadataStore to check if there is any new file (or) any file with same name (or) same file got modified then the payload should invoke the file. But it is not listening for the existing file got modified/modified with time.

Please suggest any good solution for resolving this issue

@Bean
@InboundChannelAdapter(value = "inputChannel", poller = @Poller(fixedDelay = "1000", maxMessagesPerPoll = "1"))
public MessageSource<File> receive() throws Exception {
    FtpInboundFileSynchronizingMessageSource messageSource = new FtpInboundFileSynchronizingMessageSource(
            synchronizer());
    Logger.info(messageSource, "receive ");
    messageSource.setLocalDirectory(Temp);
    messageSource.setAutoCreateLocalDirectory(true);
    messageSource
            .setLocalFilter(fileSystemPersistentAcceptOnceFileListFilter());
    return messageSource;
}

@Bean
public FileListFilter<FTPFile> compositeFilter() throws Exception {

    Pattern pattern = Pattern.compile(".*\\.xml$");
    CompositeFileListFilter<FTPFile> compositeFileListFilter = new CompositeFileListFilter<FTPFile>();
    FileListFilter<FTPFile> fileListFilter = new FtpRegexPatternFileListFilter(
            pattern);
    compositeFileListFilter.addFilter(fileListFilter);
    compositeFileListFilter.addFilter(getAcceptOnceFileFilter());
    Logger.info(compositeFileListFilter.getClass().getName(), " compositeFilter ");
    return compositeFileListFilter;
}

@Bean
public FileListFilter<FTPFile> getAcceptOnceFileFilter() {

    FileListFilter<FTPFile> ftpPersistentAcceptOnceFileListFilter = null;
    try {
        ftpPersistentAcceptOnceFileListFilter = new FtpPersistentAcceptOnceFileListFilter(
                getMetadataStore(), "######");


    } catch (Exception e) {
        e.printStackTrace();
    }
    Logger.info(ftpPersistentAcceptOnceFileListFilter.getClass().getName(), " getAcceptOnceFileFilter ");
    return ftpPersistentAcceptOnceFileListFilter;

}

@Bean
public PropertiesPersistingMetadataStore getMetadataStore()
        throws Exception {
    PropertiesPersistingMetadataStore metadataStore = new PropertiesPersistingMetadataStore();
    metadataStore.setBaseDirectory("temp");
    metadataStore.afterPropertiesSet();
    Logger.info(metadataStore.getClass().getName(), " metadataStore ");
    return metadataStore;
}

@Bean
public AbstractInboundFileSynchronizer<FTPFile> synchronizer()
        throws Exception {
    AbstractInboundFileSynchronizer<FTPFile> fileSynchronizer = new FtpInboundFileSynchronizer(
            sessionFactory());
    fileSynchronizer.setRemoteDirectory("/RemoteFile/");
    fileSynchronizer.setDeleteRemoteFiles(false);
    fileSynchronizer.setFilter(compositeFilter());
    Logger.info(fileSynchronizer.getClass().getName(), " fileSynchronizer ");
    return fileSynchronizer;
}

@Bean
public FileSystemPersistentAcceptOnceFileListFilter fileSystemPersistentAcceptOnceFileListFilter() {
    ConcurrentMetadataStore metaDataStore;
    FileSystemPersistentAcceptOnceFileListFilter fileSystemPersistentFilter = null;
    try {
        metaDataStore = getMetadataStore();
        fileSystemPersistentFilter = new FileSystemPersistentAcceptOnceFileListFilter(
                metaDataStore, "######");
        fileSystemPersistentFilter.setFlushOnUpdate(true);

        return fileSystemPersistentFilter;
    } catch (Exception e) {
        e.printStackTrace();
    }
    Logger.info(fileSystemPersistentFilter.getClass().getName(), " fileSystemPersistentFilter ");
    return fileSystemPersistentFilter;

}

@Bean(name = "sessionFactory")
public SessionFactory<FTPFile> sessionFactory() throws SocketException, IOException {
    DefaultFtpSessionFactory ftp = new DefaultFtpSessionFactory();
    ftp.setHost(hostName);
    ftp.setUsername(username);
    ftp.setPassword(passWord);
    ftp.setBufferSize(1000);

    return ftp;
}

@Bean(name = "inputChannel")
public PollableChannel inputChannel() {
    QueueChannel channel = new QueueChannel();
    return channel;
}

@Bean(name = PollerMetadata.DEFAULT_POLLER)
public PollerMetadata defaultPoller() {

    PollerMetadata pollerMetadata = new PollerMetadata();
    pollerMetadata.setTrigger(new PeriodicTrigger(10));
    return pollerMetadata;
}

@ServiceActivator(inputChannel = "inputChannel")
public void foo(String payload) {

    System.out.println("payload: " + payload);
}

}

Answer 1

The FileSystemPersistentAcceptOnceFileListFilter is for local files, after the transfer already. To meet your requirements there is similar FtpPersistentAcceptOnceFileListFilter for remote entries.