fixed name in apache-camel, looking for specific file

Question

I built a API-REST service to obtain specific PDF documents stored in a FTP directory by passing different arguments to the URL.

I'm using APACHE-CAMEL and JAVA

Example:

My URL looks like this:

http://server3343.erp.local:5464/api/rest/invoices/receipts/pdf?companyNumber=45&accountNumber=000333&documentType=FC&transactionNumber=BG534530SF

These parameters are completed to look for a file, in the given example i set:

companyNumber: 45
accountNumber: 000333
documentType: FC
transactionNumber: BG534530SF

The PDF file has this name:

45000333FCBG534530SF

---

The problem is that it takes 20 or 25 seconds or even higher to get a document and i wonder how can i improve search time while searching for a file

This is my code:

package ar.com.project.esb.route;

import ar.com.project.camel.common.route.RestRouteBuilder;
import ar.com.project.esb.Constants;
import org.apache.camel.LoggingLevel;
import org.apache.camel.model.rest.RestParamType;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
import javax.ws.rs.core.MediaType;

@Component
public class GetReceiptsPDFRoute extends RestRouteBuilder {

    @Value("${timeout.FTP}")
    private Long timeoutFTP;

    @Override
    public void configure() {
        super.configure();
        rest(restApiPath)
            .get("/receipts/pdf?companyNumber={companyNumber}&accountNumber={accountNumber}&documentType={documentType}&transactionNumber={transactionNumber}").id("receipts PDF")
            .param().name("companyNumber").type(RestParamType.query).dataType("String").required(true).endParam()
            .param().name("accountNumber").type(RestParamType.query).dataType("String").required(true).endParam()
            .param().name("documentType").type(RestParamType.query).dataType("String").required(true).endParam()
            .param().name("transactionNumber").type(RestParamType.query).dataType("String").required(true).endParam()
            .consumes(MediaType.APPLICATION_JSON)
            .produces("application/pdf")
            .to("direct:receiptsPDF");

        /**
         *  set name and location to find PDF documents in FTP directory
         */
        from("direct:receiptsPDF").routeId("ReceiptsPDF")
            .setProperty("currentOperation", constant("ReceiptsPDF"))
            .log(LoggingLevel.INFO,"getClaimStatus", "[Inicia ${property.currentOperation}]")
            .log(LoggingLevel.INFO, "company Number: ${header.companyNumber}")
            .log(LoggingLevel.INFO, "account Number: ${header.accountNumber}")
            .log(LoggingLevel.INFO, "document Type: ${header.documentType}")
            .log(LoggingLevel.INFO, "transaction Type: ${header.transactionNumber}")
            .doTry()
                .choice()
                    .when(header("documentType").isEqualTo(Constants.RECEIPT))
                        .log(LoggingLevel.INFO, "[${property.currentOperation}] Find RECEIPT")
                        .setHeader("TARGET_DIR", constant("{{source.erp.RECEIPTs}}"))
                .endChoice()
                .otherwise()
                    .log(LoggingLevel.INFO, "[${property.currentOperation}] Find DOCUMENTS")
                    .setHeader("TARGET_DIR", constant("{{source.erp.DOCUMENTS}}"))
                .end()
                .setProperty("fileName", simple("${header.companyNumber}${header.accountNumber}${header.documentType}${header.transactionNumber}.pdf"))
                .to("direct:findPdfInFTP")
                .log(LoggingLevel.INFO,"getClaimStatus", "[Ending ${property.currentOperation}]")
            .endDoTry()
            .doCatch(Exception.class)
                .log(LoggingLevel.ERROR, "getReceipts", "[ERROR: ${exception.message}")
        .end();

        /**
         *  Search in FTP directory
         */
        from("direct:findPdfInFTP").routeId("find file in ftp")
            .doTry()
                .log(LoggingLevel.INFO, "Search: ${header.TARGET_DIR}/${property.fileName}")
                .pollEnrich().simple("{{erp.sftp}}/${header.TARGET_DIR}?password={{erp.sftp.password}}&fileName=${property.fileName}&disconnect=true&noop=true&recursive=true&useUserKnownHostsFile=false&idempotent=false&include=.*.pdf").timeout(timeoutFTP)
                .choice()
                    .when(simple("${body} == null"))
                        .log(LoggingLevel.ERROR, "getClaimStatus", "[ERROR: file does not exist...]")
                .otherwise()
                    .log(LoggingLevel.INFO,"FILE OBTAINED: ${headers.CamelFileName}")
            .endDoTry()
            .doCatch(Exception.class)
                .log(LoggingLevel.ERROR, "getReceipts", "[ERROR: ${exception.message}")
        .end();
    }
}

---

A guy told me about making an attempt to download it instead of searching, using a fixed name and gave me this link: https://camel.apache.org/components/3.18.x/ftp-component.html#_consuming_a_single_file_using_a_fixed_name

Don't know how to make it work on my code, could you please help me?