JSF：ManagedBean，處理業務邏輯的好地方？

Question

我managedBean爲fileUpload，一旦文件被上傳，然後我需要根據從解析器下拉列表中選擇什麼樣的價值，然後在解析器正在創建的DetailsClass對象，其中我打電話getDetails方法爲特定的類，事情打電話給不同的解析器這裏需要注意的是，無論是parserClass也不DetailsClass faces-config.xml中註冊，我的問題在這裏

• 如果我想保持從FileUpload類Parser類DetailsClass會話信息，那麼我應該在faces-config.xml來定義它但parser類應該如何DetailsClass應該定義，應該定義爲managedBean還是像其他東西？

下面是代碼：

在我managedBean類我有兩個功能，fileUpload和callParser如圖所示：

public void uploadFile(FileEntryEvent event) 
{ 
    FacesContext ctx = FacesContext.getCurrentInstance(); 
    //Setting getSession to false, container will not create new session if session is not present and return null 
    HttpSession session = (HttpSession) ctx.getExternalContext().getSession(false); 
    setSession(session); 

    resultBean = new ResultBean(); 
    FileEntry fileEntry = (FileEntry) event.getSource(); 
    FileEntryResults results = fileEntry.getResults(); 
    FileEntry fe = (FileEntry) event.getComponent(); 

    FacesMessage msg = new FacesMessage(); 
    for (FileEntryResults.FileInfo fileInfo : results.getFiles()) 
    { 
     if (fileInfo.isSaved()) 
     { 
      File file = fileInfo.getFile(); 
      String filePath = file.getAbsolutePath(); 
      callParser(selectedItem, filePath); 
     } 
     resultBeanList.add(resultBean); 
    } 
} 

private void callParser(String parserType, String filePath) 
{ 
    if ("Delta".equals(parserType)) 
    { 
     PositionParserDelta deltaParser = new PositionParserDelta(); 
     deltaParser.getQuotes(filePath); 
    } 
    else if ("Gamma".equals(parserType)) 
    { 
     PositionParserGamma gammaParser = new PositionParserGamma(); 
     gammaParser.getQuotes(filePath); 
    } 
} 

現在，讓我們說，我們在類我認爲Delta Parser，所以碰到這樣的：

public class PositionParserDelta extends Base 
{ 
    List<String[]> dataList = new ArrayList<String[]>(); 
    ContractManager contractManager = new ContractManager(); 

    public PositionParserDelta() 
    { 
    } 

    public void getQuotes(String fileName) 
    { 
     try 
     { 
      Map<String, ContractSeries> gsLookup = contractManager.getContractsMap(ContractManager.VendorQuotes.KRT); 
      CSVReader reader = new CSVReader(new FileReader(fileName), '\t'); 
      String[] header = reader.readNext(); 
      dataList = reader.readAll(); 
      List<Trade> tradeBeanList = new ArrayList<Trade>(); 
      for (String[] data : dataList) 
      { 
       //Some Business Logic 
      } 
     } 
     catch (Exception e) 
     { 
      e.printStackTrace(); 
     } 
    } 
} 

我contractManager柯樂長相像

public class ContractManager extends Base 
    { 
     private List<Series> List = new ArrayList<Series>(); 
     private ContractSeries[] SeriesList = new Series[3]; 
     private ListingOps listingOps; 

//This line throws error as faces class not found and it makes sense because am not registering this with faces-config.xml 
     HttpSession session = (HttpSession) FacesContext.getCurrentInstance().getExternalContext().getSession(false); 

     public List<ContractSeries> getContracts(long orgId, HttpSession session) 
     { 
      log.info("Inside getContracts method call"); 
      if (false) 
      { 
       //Some Logic 
      } 
      else 
      { 
       try 
       { 
        //Set session and get initialContext to retrieve contractSeries data from ejb calls 
        log.info("Trying to get allContractSeries data from listingOpsBean"); 
        Series[] allSeries = deltaOps.findAllSeries(true); 
        Collections.addAll(contractList, allContractSeries); 
       } 
       catch (Exception ex) 
       { 

       } 
      } 
      return contractList; 
     } 

     public Map<String, ContractSeries> getContractsMap(VendorQuotes vendorQuotes) 
     { //Some Logic 
    } 

但在faces-config.xml文件，

<managed-bean> 
     <managed-bean-name>fileUpload</managed-bean-name> 
     <managed-bean-class>trade.UploadBlotterBean</managed-bean-class> 
     <managed-bean-scope>session</managed-bean-scope> 
</managed-bean> 

所以基本上我的問題是，

如果假設我從managedBean調用其他類那麼應該如何 它們被定義在faces-config.xml中，並且因爲是JSF的新增功能，所以 從managedBean中調用其他類，有些業務 在這些類的邏輯被認爲是良好的做法？

此外，我需要確保我認爲，我在UploadFile跨Parser和ContractMapping類獲取會話。

此外，

是一切「註冊」在臉上，配置管理，豆？

Answer 1

不知道，但我想每個bean是在faces-config註冊爲<managed-bean>。在特定的角色，一類遊戲，它們可分爲

1. Model Managed-Bean

2. 襯管bean

3. 控制器管理豆

4. 支持託管bean

5. Utility Managed Bean ...

通過給他們適當的名稱，你可以在faces-config區分它們。根據bean提供的工作，設置範圍。