This version is still in development and is not considered stable yet. For the latest stable version, please use Spring Integration 6.3.2! |
Using MessageSessionCallback
Starting with Spring Integration 4.2, you can use a MessageSessionCallback<F, T>
implementation with the <int-ftp:outbound-gateway/>
(FtpOutboundGateway
in Java) to perform any operations on the Session<FTPFile>
with the requestMessage
context.
It can be used for any non-standard or low-level FTP operations and allows access from an integration flow definition and functional interface (Lambda) implementation injection, as the following example shows:
@Bean
@ServiceActivator(inputChannel = "ftpChannel")
public MessageHandler ftpOutboundGateway(SessionFactory<FTPFile> sessionFactory) {
return new FtpOutboundGateway(sessionFactory,
(session, requestMessage) -> session.list(requestMessage.getPayload()));
}
Another example might be to pre- or post-process the file data being sent or retrieved.
When using XML configuration, the <int-ftp:outbound-gateway/>
provides a session-callback
attribute to let you specify the MessageSessionCallback
bean name.
The session-callback is mutually exclusive with the command and expression attributes.
When configuring with Java, different constructors are available in the FtpOutboundGateway class.
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