Spring integration 在SFTP中，将文件传输到一个远程文件夹，并需要删除另一个远程文件夹中的相同文件

使用发布-订阅，我将本地文件推送到多个远程文件夹（remoteDirectory1、remoteDirectory2（复制到远程成功和存档文件夹）） 同时，我需要删除另一个remoteDirectory3中的同一文件（例如：从远程处理文件夹中删除）

使用下面的代码，我可以将文件传输到远程，但无法删除另一个远程目录中的文件

我对outboundGateway中的SPEL表达式感到困惑

private IntegrationFlow pushRemoteFolder(final String localDirectory, String remoteDirectory1, String remoteDirectory2,String remoteDirectory3,String adapterName, String filePattern, String fileRenameExpression) {

    return IntegrationFlows
            .from(Files.inboundAdapter(Paths.get(localDirectory).toFile())
                            .regexFilter(filePattern)
                            .preventDuplicates(false),
                    e -> {
                        e.poller(Pollers.fixedDelay(SftpProperties.getPollerIntervalMs())
                                .maxMessagesPerPoll(SftpProperties.getMaxFetchSize())
                                .errorChannel("errorChannel")
                                .transactional(transactionManager)
                                .transactionSynchronizationFactory(PushSftpSyncFactory()) // moves processed files
                        ).id(adapterName);
                    })
            .publishSubscribeChannel(s -> s
                    .subscribe(f -> f
                            .handle(Sftp.outboundAdapter(PushSftpSessionFactory())
                                    .remoteDirectory(sftpProperties.getRemoteRootDir() + remoteDirectory1)
                                    .fileNameExpression(fileRenameExpression) //.fileNameExpression("payload.getName().replace('A','B')")
                                    .temporaryFileSuffix(".tmp")))
                    .subscribe(f -> f
                            .handle(Sftp.outboundAdapter(PushSftpSessionFactory())
                                    .remoteDirectory(sftpProperties.getRemoteRootDir() + remoteDirectory2)
                                    .fileNameExpression(fileRenameExpression)
                                    .temporaryFileSuffix(".tmp")))
                    .subscribe(f -> f
                            .handle(Sftp.outboundGateway(PushSftpSessionFactory()
                                    ,AbstractRemoteFileOutboundGateway.Coand.RM
                                    ,"'" + mmSftpProperties.getRemoteRootDir() + remoteDirectory3 + "/' + payload.name")))

            ).get();
}

字符串的值

sftproperties.getRemoteRootDir（）=>/home/hari

，

remoteDirectory3=/Sample/Processing

....

我想我在表达式中缺少文件名 如果我给硬代码值“'/home/hari/Sample/Processing/Sample.xml'”，它会删除文件，但不会收到回复通道错误

获取以下错误

        16:57:13.447 [task-scheduler-5] ERROR o.s.i.handler.LoggingHandler - org.springframework.messaging.MessagingException: Failed to handle Message; nested exception is org.springframework.messaging.core.DestinationResolutionException: no output-channel or replyChannel header available, failedMessage=GenericMessage [payload=local\outbound\Sample.xml, headers={id=4cdd9962-cb42-7bc1-d30e-b999d693b22e, timestamp=1548780989522}]
    at org.springframework.integration.dispatcher.BroadcastingDispatcher.invokeHandler(BroadcastingDispatcher.java:242)
    at org.springframework.integration.dispatcher.BroadcastingDispatcher.dispatch(BroadcastingDispatcher.java:185)
    at org.springframework.integration.channel.AbstractSubscribableChannel.doSend(AbstractSubscribableChannel.java:89)
    at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:425)
    at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:375)
    at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:115)
    at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:45)
    at org.springframework.messaging.core.AbstractMessageSendingTemplate.send(AbstractMessageSendingTemplate.java:105)
    at org.springframework.integration.endpoint.SourcePollingChannelAdapter.handleMessage(SourcePollingChannelAdapter.java:210)
    at org.springframework.integration.endpoint.AbstractPollingEndpoint.doPoll(AbstractPollingEndpoint.java:272)
    at org.springframework.integration.endpoint.AbstractPollingEndpoint.access$000(AbstractPollingEndpoint.java:58)
    at org.springframework.integration.endpoint.AbstractPollingEndpoint$1.call(AbstractPollingEndpoint.java:190)
    at org.springframework.integration.endpoint.AbstractPollingEndpoint$1.call(AbstractPollingEndpoint.java:186)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:333)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
    at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:282)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213)
    at com.sun.proxy.$Proxy94.call(Unknown Source)
    at org.springframework.integration.endpoint.AbstractPollingEndpoint$Poller$1.run(AbstractPollingEndpoint.java:353)
    at org.springframework.integration.util.ErrorHandlingTaskExecutor$1.run(ErrorHandlingTaskExecutor.java:55)
    at org.springframework.core.task.SyncTaskExecutor.execute(SyncTaskExecutor.java:50)
    at org.springframework.integration.util.ErrorHandlingTaskExecutor.execute(ErrorHandlingTaskExecutor.java:51)
    at org.springframework.integration.endpoint.AbstractPollingEndpoint$Poller.run(AbstractPollingEndpoint.java:344)
    at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54)
    at org.springframework.scheduling.concurrent.ReschedulingRunnable.run(ReschedulingRunnable.java:81)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:266)
    at java.util.concurrent.FutureTask.run(FutureTask.java)
    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:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
Caused by: org.springframework.messaging.core.DestinationResolutionException: no output-channel or replyChannel header available
    at org.springframework.integration.handler.AbstractMessageProducingHandler.sendOutput(AbstractMessageProducingHandler.java:355)
    at org.springframework.integration.handler.AbstractMessageProducingHandler.produceOutput(AbstractMessageProducingHandler.java:271)
    at org.springframework.integration.handler.AbstractMessageProducingHandler.sendOutputs(AbstractMessageProducingHandler.java:188)
    at org.springframework.integration.handler.AbstractReplyProducingMessageHandler.handleMessageInternal(AbstractReplyProducingMessageHandler.java:115)
    at org.springframework.integration.handler.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:127)
    at org.springframework.integration.dispatcher.BroadcastingDispatcher.invokeHandler(BroadcastingDispatcher.java:236)
    ... 40 more

---

请在提出此类问题时提供版本信息；查看所有版本以排列行号是一种痛苦

此表达式

sftproperties.getRemoteRootDir（）+remoteDirectory3）

不是表达式；它需要被转换成文字

"'" + sftpProperties.getRemoteRootDir() + remoteDirectory3) + "'"

---

您需要显示完整的堆栈跟踪；此表达式

/home/hari/Sample/Processing

来自何处？显示的代码与错误完全无关。请尽量具体。否则帮助你几乎是不真实的。我编辑了我的问题，请检查真的很抱歉Gary，版本是4.3.12。发布。。如何指定文件名<代码>“'”+sftpProperties.getRemoteRootDir（）+remoteDirectory3）+“'”Sftp.outboundGateway未从入站适配器获取文件名是否需要这样指定有效负载.getName（）

“''''+SFTProperties.getRemoteRootDir（）+remoteDirectory3）+”“'+'/'+'有效载荷.getName'

像这样？

payload.name

（或

payload.getName（）

）是一个有效的表达式，

payload

是对象，

name

是您获得的属性。对于网关，您传递的是一个简单的字符串，在这种情况下，将其表示为表达式时需要将其表示为文本。要创建完整的文件名，您需要

“'”+sftproperties.getRemoteRootDir（）+remoteDirectory3）+“/”+payload.name“

当前的4.3.x版本是4.3.19；4.3.12已经很旧了。谢谢-Gary工作得很好，但是获取是

org.springframework.messaging.core.DestinationResolutionException:没有可用的输出通道或replyChannel标头

错误，我需要在代码中设置空的输出通道。。。我编辑了我的新代码，更新了上面的错误消息。在网关之后添加

.channel（“nullChannel”）

。非常感谢Gary