Java 连接重置FTP后恢复文件传输
我正在使用SpringIntegration构建一个应用程序,该应用程序用于将文件从一个FTP服务器(源)发送到另一个FTP服务器(目标)。我首先使用入站适配器将文件从源目录发送到本地目录,然后使用出站适配器将文件从本地目录发送到目标目录 我的代码似乎工作正常,我能够实现我的目标,但我的问题是,在文件传输过程中,当连接重置到目标FTP服务器时,在连接开始工作后,文件传输不会继续 我使用了Java配置和适配器。有谁能告诉我,在连接重置后,是否可以以某种方式恢复文件传输 附言:我是Spring的初学者,如果我在这里做错了什么,请纠正我。谢谢 AppConfig.java:Java 连接重置FTP后恢复文件传输,java,spring,spring-boot,spring-integration,Java,Spring,Spring Boot,Spring Integration,我正在使用SpringIntegration构建一个应用程序,该应用程序用于将文件从一个FTP服务器(源)发送到另一个FTP服务器(目标)。我首先使用入站适配器将文件从源目录发送到本地目录,然后使用出站适配器将文件从本地目录发送到目标目录 我的代码似乎工作正常,我能够实现我的目标,但我的问题是,在文件传输过程中,当连接重置到目标FTP服务器时,在连接开始工作后,文件传输不会继续 我使用了Java配置和适配器。有谁能告诉我,在连接重置后,是否可以以某种方式恢复文件传输 附言:我是Spring的初学
@Configuration
@Component
public class FileTransferServiceConfig {
@Autowired
private ConfigurationService configurationService;
public static final String FILE_POLLING_DURATION = "5000";
@Bean
public SessionFactory<FTPFile> sourceFtpSessionFactory() {
DefaultFtpSessionFactory sf = new DefaultFtpSessionFactory();
sf.setHost(configurationService.getSourceHostName());
sf.setPort(Integer.parseInt(configurationService.getSourcePort()));
sf.setUsername(configurationService.getSourceUsername());
sf.setPassword(configurationService.getSourcePassword());
return new CachingSessionFactory<FTPFile>(sf);
}
@Bean
public SessionFactory<FTPFile> targetFtpSessionFactory() {
DefaultFtpSessionFactory sf = new DefaultFtpSessionFactory();
sf.setHost(configurationService.getTargetHostName());
sf.setPort(Integer.parseInt(configurationService.getTargetPort()));
sf.setUsername(configurationService.getTargetUsername());
sf.setPassword(configurationService.getTargetPassword());
return new CachingSessionFactory<FTPFile>(sf);
}
@MessagingGateway
public interface MyGateway {
@Gateway(requestChannel = "toFtpChannel")
void sendToFtp(Message message);
}
@Bean
public FtpInboundFileSynchronizer ftpInboundFileSynchronizer() {
FtpInboundFileSynchronizer fileSynchronizer = new FtpInboundFileSynchronizer(sourceFtpSessionFactory());
fileSynchronizer.setDeleteRemoteFiles(false);
fileSynchronizer.setRemoteDirectory(configurationService.getSourceDirectory());
fileSynchronizer.setFilter(new FtpSimplePatternFileListFilter(
configurationService.getFileMask()));
return fileSynchronizer;
}
@Bean
@InboundChannelAdapter(channel = "ftpChannel",
poller = @Poller(fixedDelay = FILE_POLLING_DURATION ))
public MessageSource<File> ftpMessageSource() {
FtpInboundFileSynchronizingMessageSource source =
new FtpInboundFileSynchronizingMessageSource(ftpInboundFileSynchronizer());
source.setLocalDirectory(new File(configurationService.getLocalDirectory()));
source.setAutoCreateLocalDirectory(true);
source.setLocalFilter(new AcceptOnceFileListFilter<File>());
return source;
}
@Bean
@ServiceActivator(inputChannel = "ftpChannel")
public MessageHandler targetHandler() {
FtpMessageHandler handler = new FtpMessageHandler(targetFtpSessionFactory());
handler.setRemoteDirectoryExpression(new LiteralExpression(
configurationService.getTargetDirectory()));
return handler;
}
}
@SpringBootApplication
public class Application {
public static ConfigurableApplicationContext context;
public static void main(String[] args) {
context = new SpringApplicationBuilder(Application.class)
.web(false)
.run(args);
}
@Bean
@ServiceActivator(inputChannel = "ftpChannel")
public MessageHandler sourceHandler() {
return new MessageHandler() {
@Override
public void handleMessage(Message<?> message) throws MessagingException {
Object payload = message.getPayload();
System.out.println("Payload: " + payload);
if (payload instanceof File) {
File file = (File) payload;
System.out.println("Trying to send " + file.getName() + " to target");
}
MyGateway gateway = context.getBean(MyGateway.class);
gateway.sendToFtp(message);
}
};
}
}
@配置
@组成部分
公共类FileTransferServiceConfig{
@自动连线
专用配置服务配置服务;
公共静态最终字符串文件\u POLLING\u DURATION=“5000”;
@豆子
public SessionFactory sourceFtpSessionFactory(){
DefaultFtpSessionFactory sf=新的DefaultFtpSessionFactory();
setHost(configurationService.getSourceHostName());
setPort(Integer.parseInt(configurationService.getSourcePort());
setUsername(configurationService.getSourceUsername());
sf.setPassword(configurationService.getSourcePassword());
返回新的CachingSessionFactory(sf);
}
@豆子
public SessionFactory targetFTPSSessionFactory(){
DefaultFtpSessionFactory sf=新的DefaultFtpSessionFactory();
setHost(configurationService.getTargetHostName());
setPort(Integer.parseInt(configurationService.getTargetPort());
setUsername(configurationService.getTargetUsername());
sf.setPassword(configurationService.getTargetPassword());
返回新的CachingSessionFactory(sf);
}
@消息网关
公共接口MyGateway{
@网关(requestChannel=“toFtpChannel”)
void sendtoptp(消息消息);
}
@豆子
公共FtpInboundFileSynchronizer FtpInboundFileSynchronizer(){
FtpInboundFileSynchronizer fileSynchronizer=新的FtpInboundFileSynchronizer(sourceFtpSessionFactory());
fileSynchronizer.setDeleteRemoteFiles(false);
fileSynchronizer.setRemoteDirectory(configurationService.getSourceDirectory());
fileSynchronizer.setFilter(新的FtpSimplePatternFileListFilter(
configurationService.getFileMask());
返回文件同步器;
}
@豆子
@InboundChannelAdapter(channel=“ftpcchannel”,
轮询器=@poller(fixedDelay=文件\u轮询\u持续时间))
public MessageSource ftpMessageSource(){
FtpInboundFileSynchronizingMessageSource源=
新的FtpInboundFileSynchronizingMessageSource(ftpInboundFileSynchronizer());
setLocalDirectory(新文件(configurationService.getLocalDirectory());
source.setAutoCreateLocalDirectory(true);
setLocalFilter(新的AcceptOnceFileListFilter());
返回源;
}
@豆子
@ServiceActivator(inputChannel=“ftpChannel”)
public MessageHandler targetHandler(){
FtpMessageHandler=新的FtpMessageHandler(targetFtpSessionFactory());
handler.setRemoteDirectoryExpression(新的LiteralExpression(
configurationService.getTargetDirectory());
返回处理程序;
}
}
Application.java:
@Configuration
@Component
public class FileTransferServiceConfig {
@Autowired
private ConfigurationService configurationService;
public static final String FILE_POLLING_DURATION = "5000";
@Bean
public SessionFactory<FTPFile> sourceFtpSessionFactory() {
DefaultFtpSessionFactory sf = new DefaultFtpSessionFactory();
sf.setHost(configurationService.getSourceHostName());
sf.setPort(Integer.parseInt(configurationService.getSourcePort()));
sf.setUsername(configurationService.getSourceUsername());
sf.setPassword(configurationService.getSourcePassword());
return new CachingSessionFactory<FTPFile>(sf);
}
@Bean
public SessionFactory<FTPFile> targetFtpSessionFactory() {
DefaultFtpSessionFactory sf = new DefaultFtpSessionFactory();
sf.setHost(configurationService.getTargetHostName());
sf.setPort(Integer.parseInt(configurationService.getTargetPort()));
sf.setUsername(configurationService.getTargetUsername());
sf.setPassword(configurationService.getTargetPassword());
return new CachingSessionFactory<FTPFile>(sf);
}
@MessagingGateway
public interface MyGateway {
@Gateway(requestChannel = "toFtpChannel")
void sendToFtp(Message message);
}
@Bean
public FtpInboundFileSynchronizer ftpInboundFileSynchronizer() {
FtpInboundFileSynchronizer fileSynchronizer = new FtpInboundFileSynchronizer(sourceFtpSessionFactory());
fileSynchronizer.setDeleteRemoteFiles(false);
fileSynchronizer.setRemoteDirectory(configurationService.getSourceDirectory());
fileSynchronizer.setFilter(new FtpSimplePatternFileListFilter(
configurationService.getFileMask()));
return fileSynchronizer;
}
@Bean
@InboundChannelAdapter(channel = "ftpChannel",
poller = @Poller(fixedDelay = FILE_POLLING_DURATION ))
public MessageSource<File> ftpMessageSource() {
FtpInboundFileSynchronizingMessageSource source =
new FtpInboundFileSynchronizingMessageSource(ftpInboundFileSynchronizer());
source.setLocalDirectory(new File(configurationService.getLocalDirectory()));
source.setAutoCreateLocalDirectory(true);
source.setLocalFilter(new AcceptOnceFileListFilter<File>());
return source;
}
@Bean
@ServiceActivator(inputChannel = "ftpChannel")
public MessageHandler targetHandler() {
FtpMessageHandler handler = new FtpMessageHandler(targetFtpSessionFactory());
handler.setRemoteDirectoryExpression(new LiteralExpression(
configurationService.getTargetDirectory()));
return handler;
}
}
@SpringBootApplication
public class Application {
public static ConfigurableApplicationContext context;
public static void main(String[] args) {
context = new SpringApplicationBuilder(Application.class)
.web(false)
.run(args);
}
@Bean
@ServiceActivator(inputChannel = "ftpChannel")
public MessageHandler sourceHandler() {
return new MessageHandler() {
@Override
public void handleMessage(Message<?> message) throws MessagingException {
Object payload = message.getPayload();
System.out.println("Payload: " + payload);
if (payload instanceof File) {
File file = (File) payload;
System.out.println("Trying to send " + file.getName() + " to target");
}
MyGateway gateway = context.getBean(MyGateway.class);
gateway.sendToFtp(message);
}
};
}
}
@springboot应用程序
公共类应用程序{
公共静态配置应用上下文上下文;
公共静态void main(字符串[]args){
上下文=新的SpringApplicationBuilder(Application.class)
.web(错误)
.run(args);
}
@豆子
@ServiceActivator(inputChannel=“ftpChannel”)
public MessageHandler sourceHandler(){
返回新的MessageHandler(){
@凌驾
public void handleMessage(消息消息消息)引发MessaginException{
对象负载=message.getPayload();
系统输出打印项次(“有效载荷:+有效载荷);
if(文件的有效负载实例){
文件=(文件)有效载荷;
System.out.println(“试图将”+file.getName()+“发送到目标”);
}
MyGateway=context.getBean(MyGateway.class);
gateway.sendtoptp(消息);
}
};
}
}
首先,不清楚sourceHandler
用于什么,但您确实应该确保它已订阅(或targetHandler
)到正确的频道
我相信在你的目标代码中,targetHandler
实际上是订阅了toFtpChannel
不管怎样,这没有关系
我认为这里的问题恰恰与AcceptOnceFileListFilter
和错误有关。因此,在目录扫描期间,过滤器首先工作,出于性能原因,将所有本地文件加载到内存队列中。然后,所有这些数据都被发送到通道进行处理。当我们到达targetHandler
并得到一个异常时,我们只是悄悄地转到了全局errorChannel
,失去了文件尚未传输的事实。内存中的所有剩余文件都会发生这种情况。我认为传输已经恢复,但它已经开始工作,只适用于远程目录中的新文件
我建议您将expressionevaluation请求Handleradvice
添加到targetHandler
定义(@ServiceActivator(adviceChain)
)中,如果出现错误,请调用AcceptOnceFileListFilter.remove(File)
:
通过这种方式,您可以从筛选器中删除失败的文件,并在下一个筛选器中拾取这些文件