Spring Integration doesn't synchronize with FTP mainframe system - spring-integration

Question

I am trying to sycronize an FTP folder with a local directory. This FTP server is running on z/OS, it's a mainframe with he MVS operating system.
So far I've had a lot of problems even to manage to connect to the folder I needed because this system doesn't have a "normal" folder system.
This is what I've done to change to the working directory where my files are:
public class DefaultFtpHostSessionFactory extends DefaultFtpSessionFactory {
protected void postProcessClientAfterConnect(FTPClient ftp) throws IOException {
ftp.changeToParentDirectory();
ftp.changeWorkingDirectory("E377D.");
}
}
Now I've defined an input-channel-adapter:
<int-ftp:inbound-channel-adapter
id="ljFtpInbound"
channel="ljFtpChannel"
session-factory="ljCachingSessionFactory"
auto-create-local-directory="true"
delete-remote-files="false"
filename-pattern="*"
remote-directory="*"
remote-file-separator=""
charset="UTF-8"
auto-startup="true"
preserve-timestamp="false"
local-filename-generator-expression="#this.toUpperCase()"
temporary-file-suffix=".writing"
local-directory="/tmp/">
<int:poller fixed-rate="1000" />
</int-ftp:inbound-channel-adapter>
As you can notice the remote directory is "*", that's for listing the directory, at least is the only way I've managed to do it.
But when FtpInboundFileSynchronizer tries to synchronize the folder I get an error because when it tries to copy the file the path is build with:
String remoteFilePath = remoteDirectoryPath + remoteFileSeparator + remoteFileName;
Which in my case would be "ASTERISK" + "BLANK" + "REMOTE_FILE_NAME", because I had to use "*" as the remote-directory, so it doesn't find the file.
¿Do you know if I can not to set the remote-directory (which I tried but didn't achieve)? Or there is another way to synchronized this weird FTP system.
Thank you.

Answer 1

How about this?
Starting with version 4.3, The remote-directory/remote-directory-expression attributes can be omitted assuming null. In this case, according to the FTP protocol, the Client working directory is used as a default remote directory.
That means you should try to upgrade to Spring Integration 4.3 and remove that strange * at all.