I am using spring Integration for my file transfer
following code is working fine, but if I remove folder from source directory It start throwing exceptions.
IntegrationFlow flow = IntegrationFlows.from(Sftp.inboundAdapter(inboundSftp)
.localDirectory(new File(classLoader.getResource(".").getFile() + "/files/" + String.valueOf(config.getId())))
.deleteRemoteFiles(true)
.autoCreateLocalDirectory(true)
.remoteDirectory(config.getInboundDirectory()), e -> e.poller(Pollers.fixedDelay(4_000)))
.transform((File f) -> pgpEncryption.encrypt(f))
.handle(Sftp.outboundAdapter(outboundSftp)
.useTemporaryFileName(false)
.autoCreateDirectory(true)
.remoteDirectory(config.getOutboundDirectory()), c -> c.advice(sftpConfig.deleteFileAdvice())
)
.get();
follwing is the exception if source folder doest not exists.
2018-10-01 17:13:02.362 ERROR 12320 --- [ask-scheduler-8] o.s.integration.handler.LoggingHandler : org.springframework.messaging.MessagingException: Problem occurred while synchronizing remote to local directory; nested exception is org.springframework.messaging.MessagingException: Failed to execute on session; nested exception is org.springframework.core.NestedIOException: Failed to list files; nested exception is 2: No such file
at org.springframework.integration.file.remote.synchronizer.AbstractInboundFileSynchronizer.synchronizeToLocalDirectory(AbstractInboundFileSynchronizer.java:331)
at org.springframework.integration.file.remote.synchronizer.AbstractInboundFileSynchronizingMessageSource.doReceive(AbstractInboundFileSynchronizingMessageSource.java:260)
at org.springframework.integration.file.remote.synchronizer.AbstractInboundFileSynchronizingMessageSource.doReceive(AbstractInboundFileSynchronizingMessageSource.java:65)
at org.springframework.integration.endpoint.AbstractFetchLimitingMessageSource.doReceive(AbstractFetchLimitingMessageSource.java:43)
at org.springframework.integration.endpoint.AbstractMessageSource.receive(AbstractMessageSource.java:154)
at org.springframework.integration.endpoint.SourcePollingChannelAdapter.receiveMessage(SourcePollingChannelAdapter.java:243)
at org.springframework.integration.endpoint.AbstractPollingEndpoint.doPoll(AbstractPollingEndpoint.java:262)
at org.springframework.integration.endpoint.AbstractPollingEndpoint$Poller.lambda$run$0(AbstractPollingEndpoint.java:391)
at org.springframework.integration.util.ErrorHandlingTaskExecutor.lambda$execute$0(ErrorHandlingTaskExecutor.java:57)
at org.springframework.core.task.SyncTaskExecutor.execute(SyncTaskExecutor.java:50)
at org.springframework.integration.util.ErrorHandlingTaskExecutor.execute(ErrorHandlingTaskExecutor.java:55)
at org.springframework.integration.endpoint.AbstractPollingEndpoint$Poller.run(AbstractPollingEndpoint.java:385)
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$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: org.springframework.messaging.MessagingException: Failed to execute on session; nested exception is org.springframework.core.NestedIOException: Failed to list files; nested exception is 2: No such file
at org.springframework.integration.file.remote.RemoteFileTemplate.execute(RemoteFileTemplate.java:445)
at org.springframework.integration.file.remote.synchronizer.AbstractInboundFileSynchronizer.synchronizeToLocalDirectory(AbstractInboundFileSynchronizer.java:286)
... 20 more
Caused by: org.springframework.core.NestedIOException: Failed to list files; nested exception is 2: No such file
at org.springframework.integration.sftp.session.SftpSession.list(SftpSession.java:103)
at org.springframework.integration.sftp.session.SftpSession.list(SftpSession.java:50)
at org.springframework.integration.file.remote.session.CachingSessionFactory$CachedSession.list(CachingSessionFactory.java:218)
at org.springframework.integration.file.remote.synchronizer.AbstractInboundFileSynchronizer.lambda$synchronizeToLocalDirectory$1(AbstractInboundFileSynchronizer.java:287)
at org.springframework.integration.file.remote.RemoteFileTemplate.execute(RemoteFileTemplate.java:436)
... 21 more
Caused by: 2: No such file
at com.jcraft.jsch.ChannelSftp.throwStatusError(ChannelSftp.java:2873)
at com.jcraft.jsch.ChannelSftp._stat(ChannelSftp.java:2225)
at com.jcraft.jsch.ChannelSftp._stat(ChannelSftp.java:2242)
at com.jcraft.jsch.ChannelSftp.ls(ChannelSftp.java:1592)
at com.jcraft.jsch.ChannelSftp.ls(ChannelSftp.java:1553)
at org.springframework.integration.sftp.session.SftpSession.list(SftpSession.java:91)
... 25 more
so, what will be the way to catch this exception and log appropriate message. I will have some other problems too like invalid server ip, invalid private key.
That o.s.integration.handler.LoggingHandler : org.springframework.messaging.MessagingException: really comes from the global errorChannel configured to the SourcePollingChannelAdapter by default. You can provide your own variant via SourcePollingChannelAdapterSpec and its poller()configuration:
e -> e.poller(Pollers.fixedDelay(4_000).errorChannel(myErrorChannel))
This custom channel can be subscribed as any other one and there you can handle an ErrorChannel whatever way you need. The @ServiceActivator or other IntegrationFlow can be used on the matter.