RequestHandlerRetryAdvice cannot be made to work with Ftp.outboundGateway in Spring Integration

Question

My situation is similar to the one described in this SO question. The difference being that I don\'t use a WebFlux.outboundGateway but an Ftp.outboundGateway<

Answer 1

Sorry for the delay; we are at SpringOne Platform this week.

The problem is due to the fact that the gateway spec is a bean - the gateway ends up being initialized before the advice is applied.

I changed your code like this...

@Bean
public IntegrationFlow downloadFiles(SessionFactory sessionFactory) {
    return f -> f.handle(getRemoteFile(sessionFactory), getRetryAdvice())
            .channel("gatewayDownloadsOutputChannel");
}

...

private RemoteFileOutboundGatewaySpec getRemoteFile(SessionFactory sessionFactory) {
    return Ftp.outboundGateway(sessionFactory,
            AbstractRemoteFileOutboundGateway.Command.GET,
            "payload")
            .fileExistsMode(FileExistsMode.REPLACE)
            .localDirectoryExpression("'/tmp'")
            .autoCreateLocalDirectory(true);
}

...and it worked.

It's generally better to not deal with Specs directly and just have them inlined in the flow definition...

@Bean
public IntegrationFlow downloadFiles(SessionFactory sessionFactory) {
    return f -> f.handle(Ftp.outboundGateway(sessionFactory,
            AbstractRemoteFileOutboundGateway.Command.GET,
            "payload")
            .fileExistsMode(FileExistsMode.REPLACE)
            .localDirectoryExpression("'/tmp'")
            .autoCreateLocalDirectory(true), getRetryAdvice())
        .channel("gatewayDownloadsOutputChannel");
}