FtpServerConfiguration.java

package ftp.service;

import org.apache.ftpserver.FtpServer;
import org.apache.ftpserver.FtpServerFactory;
import org.apache.ftpserver.filesystem.nativefs.NativeFileSystemFactory;
import org.apache.ftpserver.ftplet.FileSystemFactory;
import org.apache.ftpserver.ftplet.FtpException;
import org.apache.ftpserver.ftplet.UserManager;
import org.apache.ftpserver.listener.Listener;
import org.apache.ftpserver.listener.ListenerFactory;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;

import java.util.Collections;

@Configuration
@Import(FtpUserManagerConfiguration.class)
public class FtpServerConfiguration {

    // todo replace this with something that works on Mongo GridFS
    @Bean
    FileSystemFactory fileSystemFactory() {
        NativeFileSystemFactory fileSystemFactory = new NativeFileSystemFactory();
        fileSystemFactory.setCreateHome(true);
        fileSystemFactory.setCaseInsensitive(false);
        return fileSystemFactory::createFileSystemView;
    }

    @Bean
    Listener nioListener(@Value("${ftp.port}") int port) throws Exception {
        ListenerFactory listenerFactory = new ListenerFactory();
        listenerFactory.setPort(port);
        return listenerFactory.createListener();
    }

    @Bean
    FtpServer ftpServer(UserManager userManager, Listener nioListener, FileSystemFactory fileSystemFactory) throws FtpException {
        FtpServerFactory ftpServerFactory = new FtpServerFactory();
        ftpServerFactory.setListeners(Collections.singletonMap("default", nioListener));
        ftpServerFactory.setFileSystem(fileSystemFactory);
        ftpServerFactory.setUserManager(userManager);
        return ftpServerFactory.createServer();
    }

    @Bean
    DisposableBean destroysFtpServer(FtpServer ftpServer) {
        return ftpServer::stop;
    }

    @Bean
    InitializingBean startsFtpServer(FtpServer ftpServer) throws Exception {
        return ftpServer::start;
    }

}