我正在尝试通过Sftp并使用Spring Integration SftpOutboundGateway方法删除多个文件。
我正在使用QueueChannel进行请求和响应。另外，我将采用异步方式，以便我可以提交多个请求。 我最近还添加了一个错误频道。
现在的问题是，我的第一个请求是请求一个不存在的文件，因此可以得到“ 2：No such file”异常消息。但是一旦发生这种情况，其他请求就会卡住。
以下是未找到文件的情况的错误消息：
DEBUG o.s.integration.util.SimplePool - Obtained new org.springframework.integration.sftp.session.SftpSession@4ec427c0.
DEBUG o.s.i.f.r.s.CachingSessionFactory - Releasing Session org.springframework.integration.sftp.session.SftpSession@4ec427c0 back to the pool.
INFO com.jcraft.jsch - Disconnecting from xxxx
DEBUG o.s.integration.util.SimplePool - Releasing org.springframework.integration.sftp.session.SftpSession@4ec427c0 back to the pool
INFO com.jcraft.jsch - Caught an exception, leaving main loop due to Socket closed
Caused by: org.springframework.messaging.MessageHandlingException: error occurred in message handler [sftpDeleteFileHandler]; nested exception is org.springframework.messaging.MessagingException: Failed to execute on session; nested exception is org.springframework.core.NestedIOException: Failed to remove file.; nested exception is 2: No such file, failedMessage=GenericMessage [xxx]
at org.springframework.integration.support.utils.IntegrationUtils.wrapInHandlingExceptionIfNecessary(IntegrationUtils.java:189)
at org.springframework.integration.handler.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:186)
at org.springframework.integration.endpoint.PollingConsumer.handleMessage(PollingConsumer.java:143)
at org.springframework.integration.endpoint.AbstractPollingEndpoint.doPoll(AbstractPollingEndpoint.java:390)
at org.springframework.integration.endpoint.AbstractPollingEndpoint.pollForMessage(AbstractPollingEndpoint.java:329)
at org.springframework.integration.endpoint.AbstractPollingEndpoint.lambda$null$1(AbstractPollingEndpoint.java:277)
at org.springframework.integration.util.ErrorHandlingTaskExecutor.lambda$execute$0(ErrorHandlingTaskExecutor.java:57)
at org.springframework.core.task.SyncTaskExecutor.execute(SyncTaskExecutor.java:50)
at org.springframework.integration.util.ErrorHandlingTaskExecutor.execute(ErrorHandlingTaskExecutor.java:55)
at org.springframework.integration.endpoint.AbstractPollingEndpoint.lambda$createPoller$2(AbstractPollingEndpoint.java:274)
at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54)
at org.springframework.scheduling.concurrent.ReschedulingRunnable.run(ReschedulingRunnable.java:93)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
... 1 more
Caused by: org.springframework.messaging.MessagingException: Failed to execute on session; nested exception is org.springframework.core.NestedIOException: Failed to remove file.; nested exception is 2: No such file
at org.springframework.integration.file.remote.RemoteFileTemplate.execute(RemoteFileTemplate.java:446)
at org.springframework.integration.file.remote.gateway.AbstractRemoteFileOutboundGateway.doRm(AbstractRemoteFileOutboundGateway.java:566)
at org.springframework.integration.file.remote.gateway.AbstractRemoteFileOutboundGateway.handleRequestMessage(AbstractRemoteFileOutboundGateway.java:459)
at org.springframework.integration.handler.AbstractReplyProducingMessageHandler.handleMessageInternal(AbstractReplyProducingMessageHandler.java:123)
at org.springframework.integration.handler.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:169)
... 17 more
Caused by: org.springframework.core.NestedIOException: Failed to remove file.; nested exception is 2: No such file
at org.springframework.integration.sftp.session.SftpSession.remove(SftpSession.java:83)
at org.springframework.integration.file.remote.session.CachingSessionFactory$CachedSession.remove(CachingSessionFactory.java:225)
at org.springframework.integration.file.remote.gateway.AbstractRemoteFileOutboundGateway.rm(AbstractRemoteFileOutboundGateway.java:586)
at org.springframework.integration.file.remote.gateway.AbstractRemoteFileOutboundGateway.lambda$doRm$7(AbstractRemoteFileOutboundGateway.java:566)
at org.springframework.integration.file.remote.RemoteFileTemplate.execute(RemoteFileTemplate.java:437)
... 21 more
Caused by: 2: No such file
at com.jcraft.jsch.ChannelSftp.throwStatusError(ChannelSftp.java:2873)
at com.jcraft.jsch.ChannelSftp.rm(ChannelSftp.java:1985)
at org.springframework.integration.sftp.session.SftpSession.remove(SftpSession.java:79)
... 25 more
更新1：
我正在使用Spring Boot 2.1.8-> Spring Integration 5.1.7
配置：
@Bean
public SessionFactory<LsEntry> sftpSessionFactory() {
DefaultSftpSessionFactory factory = new DefaultSftpSessionFactory(true);
factory.setHost(host);
factory.setPort(port);
factory.setUser(user);
factory.setPassword(password);
factory.setAllowUnknownKeys(true);
return new CachingSessionFactory<LsEntry>(factory);
}
@Bean(name = PollerMetadata.DEFAULT_POLLER)
public PollerMetadata defaultPoller() {
PollerMetadata pollerMetadata = new PollerMetadata();
pollerMetadata.setTrigger(new PeriodicTrigger(10));
return pollerMetadata;
}
@Bean(name = "sftp.file.delete.request.channel")
public MessageChannel sftpFileDeleteRequestChannel() {
return new QueueChannel();
}
@Bean(name = "sftp.file.delete.response.channel")
public MessageChannel sftpFileDeleteResponseChannel() {
return new QueueChannel();
}
@Bean(name = "sftp.error.channel")
public MessageChannel sftpErrorChannel() {
return MessageChannels.queue("sftp.error.channel").get();
}
@Bean
@ServiceActivator(inputChannel = "sftp.file.delete.request.channel", async = "true")
public MessageHandler sftpDeleteFileHandler() {
SftpOutboundGateway sftpOutboundGateway = new SftpOutboundGateway(sftpSessionFactory(), Command.RM.getCommand(),
"headers['file_remoteDirectory'] + headers['file_remoteFile']");
sftpOutboundGateway.setRequiresReply(true);
return sftpOutboundGateway;
}
@ServiceActivator(inputChannel = "sftp.error.channel")
public void sftpErrorHandler(final Message<MessageHandlingException> excpMessage) {
log.error(excpMessage.getPayload().getCause());
}
@MessagingGateway(errorChannel = "sftp.error.channel")
public interface SftpDeleteMessagingGateway {
@Gateway(requestChannel = "sftp.file.delete.request.channel", replyChannel = "sftp.file.delete.response.channel")
CompletableFuture<Message<Boolean>> deleteFile(final Message<Boolean> message);
}
代码：
List<CompletableFuture<Message<Boolean>>> fileDeleteResults = new ArrayList<>();
foreach(...) {
Message<Boolean> fileDeleteRequest = MessageBuilder.withPayload(true)
.setHeader(FileHeaders.REMOTE_DIRECTORY, directory)
.setHeader(FileHeaders.REMOTE_FILE, name).build();
fileDeleteResults.add(sftpDeleteMessagingGateway.deleteFile(fileDeleteRequest));
}
try {
CompletableFuture.allOf(fileDeleteResults.toArray(new CompletableFuture[fileDeleteResults.size()])).join();
for (CompletableFuture<Message<Boolean>> fileDeleteResult : fileDeleteResults){
Message<Boolean> message = fileDeleteResult.get();
log.debug((String) message.getHeaders().get(FileHeaders.REMOTE_DIRECTORY)
+ (String) message.getHeaders().get(FileHeaders.REMOTE_FILE)
+ ": " + message.getPayload());
}
} catch (CompletionException | InterruptedException | ExecutionException excp) {
log.error(excp);
}
更新2：
我按照建议修改了配置，但仍然面临相同的问题。下面是修改后的配置-
@Bean
@ServiceActivator(inputChannel = "sftp.file.delete.request.channel")
public MessageHandler sftpDeleteFileHandler() {
SftpOutboundGateway sftpOutboundGateway = new SftpOutboundGateway(sftpSessionFactory(), Command.RM.getCommand(),
"headers['file_remoteDirectory'] + headers['file_remoteFile']");
sftpOutboundGateway.setRequiresReply(true);
return sftpOutboundGateway;
}
@ServiceActivator(inputChannel = "sftp.error.channel")
public boolean sftpErrorHandler(final Message<MessageHandlingException> excpMessage) {
log.error(excpMessage.getPayload().getCause());
return false;
}
答案 0 :(得分：0)
好。看来您的问题是您没有捕获异常以继续前进。
请参见async上的ServiceActivatingHandler选项：
/**
* Allow async replies. If the handler reply is a {@link ListenableFuture}, send
* the output when it is satisfied rather than sending the future as the result.
* Ignored for return types other than {@link ListenableFuture}.
* @param async true to allow.
* @since 4.3
*/
public final void setAsync(boolean async) {
因此，只有从目标ListenableFuture实现中返回了Publsiher（或反应性handleRequestMessage()）后，它才真正是 async 。这不是SftpOutboundGateway的事实。因此，您在网关定义上的errorChannel = "sftp.error.channel"是正确的方法。尽管您需要从该sftpErrorHandler返回一些信息，但这将是网关调用的返回信息。否则，我们将被困在等待答复或错误。