我有fileUpload
的managementBean
,一旦文件上传,我需要根据从解析器下拉列表中选择的值调用不同的解析器,然后在解析器中创建DetailsClass
对象,其中调用该特定类的getDetails
方法,这里需要注意的是,parserClass
和DetailsClass
都没有在faces-config.xml中注册,我的这里的问题是
- 如果我想维护从
FileUpload
类到Parser
类到DetailsClass
的 session 信息,那么我应该在faces-config.xml
中定义它,但是应该如何定义parser
类和DetailsClass
,它应该定义为managementBean
还是其他东西?
这是代码:
在我的 ManagedBean 类中,我有两个函数,fileUpload
和 callParser
,如下所示:
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);
}
}
现在,假设我们考虑 Delta Parser
,所以在该类中我有类似的内容:
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();
}
}
}
我的contractManager
类看起来像
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
}
但是在 faces-config.xml 文件中,
<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>
所以基本上我的问题是,
if suppose am calling other classes from
managedBean
then how should they be defined infaces-config.xml
and since am new toJSF
, is calling other classes frommanagedBean
and having some business logic in those classes considered good practice?
此外,我需要确保在 Parser
和 ContractMapping
类中维护在 UploadFile
中获得的 session 。
另外,
Is everything is 'registered' as managed-bean in faces-config ?
最佳答案
不确定,但我认为每个 bean 都注册为 <managed-bean>
在faces-config
。就具体角色而言,一个类所扮演的角色,可以分为
Model Managed-Bean
支持托管 Bean
Controller 托管 Bean
支持托管 Bean
实用程序托管 Bean ...
通过给它们适当的名称,您可以在 faces-config
中区分它们。根据 bean 服务的工作,设置范围。
关于java - JSF : ManagedBean, 处理业务逻辑的好地方?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/10283262/