Camel: pollEnrich and access to the Exchange

From http://camel.apache.org/content-enricher.html

... Instead of using enrich you can use Recipient List and have dynamic endpoints and define an AggregationStrategy on the Recipient List which then would work as a enrich would do. ...

try something like:

from(URI_WEBSERVICE)
.convertBodyTo(Entrada.class)
.process(new ProcessorTratarWS()) 
.recipientList(simple("ftp://10.100.8.2/entradaCamel?username=USER&password=PASSWORD&delete=true&fileName=${property.archivoRespuesta}")).aggregationStrategy(new EstrategiaConfirmacion())
.to(WS_RESPONDER)

Edit:

The above code is to save file in FTP server. If you want to poll file from the FTP server you can try

        from(URI_WEBSERVICE)
            .convertBodyTo(Entrada.class)
            .process(new Processor() {
                @Override
                public void process(Exchange exchange) throws Exception {
                    // logic of ProcessorTratarWS goes here
                    ConsumerTemplate consumer=exchange.getContext().createConsumerTemplate();
                    String filename=exchange.getProperty("archivoRespuesta",String.class);                  
                    Object file=consumer.receiveBody("ftp://10.100.8.2/entradaCamel?username=USER&password=PASSWORD&delete=true&fileName="+filename,timeOut);
                    // logic of EstrategiaConfirmacion goes here
            }

        })
        .to(WS_RESPONDER);  

Disclaimer: I have not used polling consumer much and there could be more elegant/efficient solution