Moving files to archive directory using apache camel ftp component - spring

Question

I have few files stored in a database, these files were fetched from a FTP server and processed.
I am trying to move these files to archive directory on FTP server and to do that I am using producerTemplate.
This is what I have done so far.
try {
DefaultCamelContext camelContext = new DefaultCamelContext();
ProducerTemplate template = camelContext.createProducerTemplate();
template.request("ftp://xxxxx/include=fileFromDb.xml&move=archive/fileFromDb.xml", outExchange -> {
String body = outExchange.getIn().getBody(String.class);
});
} catch (Exception ex) {
// update the status in database to indicate archive failed
}
But this is failing with following error and can't get this resolved.
WARN o.a.c.c.f.remote.RemoteFileProducer - Writing file failed with: Cannot write null body to file: archive/ID-192-168-1-113-tpgi-com-au-1627667653835-1-2
I have tried implementing solutions from other answers but they didn't worked for either.
If I write a custom route like below, it works fine but because I need perform post move actions I prefere using producer template.
from("ftp://xxxxx/include=fileFromDb.xml&move=archive/fileFromDb.xml")
.log("file moved successfully").

Answer 1

If I write a custom route like below, it works fine but because I need perform post move actions I prefere using producer template.
You could use onCompletion to call another route to handle the post move actions.
String sftpURI = "sftp:localhost:2222/upload" +
"?username="+username+"&password="+password
+ "&move=done";
String sftpPostMoveURI = "sftp:localhost:2222/upload/done" +
"?username="+username+"&password="+password
+ "&fileName=${headers.CamelFileName}";
from(sftpURI)
.routeId("ReadFileUsingSFTPRoute")
.onCompletion().onCompleteOnly()
.setBody().constant("")
.to("direct:postMoveActions")
.end()
.log("file ${headers.CamelFileName} moved");
from("direct:postMoveActions")
.routeId("PostMoveActionsRoute")
.log("doing post move actions!")
.pollEnrich().simple(sftpPostMoveURI).timeout(5000)
.log("File: ${body}");