Невозможно добавить верхний и нижний колонтитулы в файл с помощью Apache Camel Bindy

Я нашел ответ. Это решение устранило многие проблемы, которые у меня были на разных этапах.

Проблема 1) Добавлены динамические верхний и нижний колонтитулы к плоскому файлу с использованием BindyFixedLengthDataFormat. Как следует из названия, это фиксированная длина. Мне пришлось назначить максимальную длину и обрезать пробелы после создания тела. (Мне все еще может понадобиться использовать другой класс или способ обрезать пробелы).

Проблема 2) У меня было требование заменить разделитель каналов на |.

Проблема 3) Вместо использования причала для предоставления URL-адреса конечной точки, который будет жестко закодирован, я использовал конфигурацию rest, чтобы имя хоста больше не было жестко закодировано, и вы могли развертывать его в любой среде.

    @Component
    public class EmployeePackageRoute extends RouteBuilder {
    
        @Autowired
        private Header header;
        
        private Trailer footer;
        
        private String file_name;
        
        @SuppressWarnings("deprecation")
        @Override
        public final void configure() {
            
            System.out.println("fetching employee details from employee api");
            
            final SimpleDateFormat TARGET_DATE_FORMAT = new SimpleDateFormat("YYYYMMDDHHMMSS");
            String date = TARGET_DATE_FORMAT.format(new Date());
            
            String year = date.substring(0, 8);
            String hr = date.substring(9, 13);
    
            try {
                restConfiguration().component("jetty").port(8000).bindingMode(RestBindingMode.json);
                rest("/api/test/getTestResponse")
                .get().consumes(MediaType.APPLICATION_JSON_VALUE).route().setBody().constant("return test response");
                
                rest("/api/bcr/recurringPaymentsDeduct")
                .post().consumes(MediaType.APPLICATION_JSON_VALUE).type(RecurringPaymentResults.class).outType(ResponseEntity.class).route()
                .process(
                        ex -> {
                            
                            RecurringPaymentResults result = ex.getIn().getBody(RecurringPaymentResults.class);
                            List<RecurringPaymentsDeduct> employee = result.getResults();
                            file_name = Constants.FILE_NUMBER_DEV+"_"+date+"_"+Constants.AUMBCR_HRMD+result.getSequenceNumber()+"_"+Constants.DUT8G2I+".SAP";
                            header.setHeader7(Constants.FILE_NUMBER_DEV+"_"+date+"_"+Constants.AUMBCR_HRMD+result.getSequenceNumber()+"_"+Constants.DUT8G2I+".SAP");
                            
                            header.setHeader8(year);
                            header.setHeader9(hr);
                            header.setHeader10(Constants.ENVIRONMENT);
                            
                            footer = new Footer("Footer",(employee.size()+2));
                            
                            ex.getOut().setBody(employee);
                        })
                .to("seda:recurringPaymentsFeed");
                
                final DataFormat recurringPaymentsBindy = new BindyFixedLengthDataFormat(RecurringPaymentsDeduct.class);
                
                from("seda:recurringPaymentsFeed")
                .startupOrder(2)
                .log("add footer to the file")
                .process(
                        ex -> {
                            
                            Map<String, Object> headerObjMap = new HashMap<String,Object>();
                            headerObjMap.put(Header.class.getName(), header);
                            System.out.println(" *** file_name 1 - "+file_name);
                            Map<String, Object> footerObjMap = new HashMap<String,Object>();
                            footerObjMap.put(Footer.class.getName(), footer);
                            
                            ex.getOut().setHeader(BindyFixedLengthDataFormat.CAMEL_BINDY_FIXED_LENGTH_HEADER, headerObjMap);
                            ex.getOut().setBody(ex.getIn().getBody());
                            ex.getOut().setHeader(BindyFixedLengthDataFormat.CAMEL_BINDY_FIXED_LENGTH_FOOTER, footerObjMap);
                            
                        })
                .marshal(recurringPaymentsBindy)
                .convertBodyTo(byte[].class, "iso-8859-1")
                .setBody(body().regexReplaceAll("\\|", "\\|\""))
                .log("csv processed")
                .to("file://app/bcr-files?fileName=recurringPaymentsDeduct.SAP")
                .end();
                
                
            } catch(Exception e) {
                System.out.println("Error occurred while processing employee data: "+e.getMessage());
                e.printStackTrace();
            }
        }
        
    }

@Data
@Section(number = 2)
@FixedLengthRecord(header = Header.class, footer = Trailer.class)
public class RecurringPaymentsDeduct implements Serializable {

    private static final long serialVersionUID = 1L;
    
    @DataField(pos = 1, length = 10, delimiter = "|", trim = true)
    public String RECTY;
    
    @DataField(pos = 2, length = 10, delimiter = "|", trim = true)
    public String CLIID;
    
    @DataField(pos = 3, length = 10, delimiter = "|", trim = true)
    public String INTCA;
    
    @DataField(pos = 4, length = 10, delimiter = "|", trim = true)
    public String ORDNO;
    
    @DataField(pos = 5, length = 10, delimiter = "|", trim = true)
    public String IOPER;
    
    @DataField(pos = 6, length = 10, delimiter = "|", trim = true)
    public String INFTY;
    
    @DataField(pos = 7, length = 10, delimiter = "|", trim = true)
    public String SUBTY;
    
    @DataField(pos = 8, length = 10, delimiter = "|", trim = true)
    public String BEGDA;
    
    @DataField(pos = 9, length = 10, delimiter = "|", trim = true)
    public String ENDDA;
    
    @DataField(pos = 10, length = 10, trim = true)
    public String OBJPS;
        
}

@Configuration
@EnableConfigurationProperties
@ConfigurationProperties("adp")
@Data
@Section(number = 1)
@FixedLengthRecord()
public class Header implements Serializable {

    private static final long serialVersionUID = 1L;

    @DataField(pos = 1, length = 5, delimiter = "|", trim = true)
    private String header1;
    
    @DataField(pos = 2, length = 5, delimiter = "|", trim = true)
    private String header2;
    
    @DataField(pos = 3, length = 15, delimiter = "|", trim = true)
    private String header3;
    
    @DataField(pos = 4, length = 60, delimiter = "|", trim = true)
    private String header4;
    
    @DataField(pos = 5, length = 15, delimiter = "|", trim = true)
    private String header5;
    
    @DataField(pos = 6, length = 30, delimiter = "|", trim = true)
    private String header6;
    
    @DataField(pos = 7, length = 30, delimiter = "|", trim = true)
    private String header7;
    
    @DataField(pos = 8, length =  8, pattern = "YYYYMMDD", delimiter = "|", trim = true)
    private String header8;
    
    @DataField(pos = 9, length = 6, delimiter = "|", trim = true)
    private String header9;
    
    @DataField(pos = 10, length = 1, delimiter = "|", trim = true)
    private String header10;
    
    @DataField(pos = 11, length = 2, delimiter = "|", trim = true)
    private String header11;
    
    @DataField(pos = 12, length = 10, delimiter = "|", trim = true)
    private String header12;
    
    @DataField(pos = 13, length = 10, delimiter = "|", trim = true)
    private String header13;
    
    @DataField(pos = 14, length = 10, align = "L", trim = true)
    private String header14;
}

@Data
@Section(number = 3)
@FixedLengthRecord()
public class Footer implements Serializable {

    private static final long serialVersionUID = 1L;

    @DataField(pos = 1, length = 7, delimiter = "|", trim = true)
    private String trailer;
    
    @DataField(pos = 2, length = 5, align = "L", trim = true)
    private int count;
    
    public Footer() {
        
    }
    
    public Footer(String trailer, int count) {
        this.trailer = trailer;
        this.count = count;
    }
}