Java Doc for HttpServletBean.java in  » J2EE » spring-framework-2.0.6 » org » springframework » web » servlet » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » J2EE » spring framework 2.0.6 » org.springframework.web.servlet 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


javax.servlet.http.HttpServlet
   org.springframework.web.servlet.HttpServletBean

All known Subclasses:   org.springframework.web.servlet.ResourceServlet,  org.springframework.web.servlet.FrameworkServlet,
HttpServletBean
abstract public class HttpServletBean extends HttpServlet (Code)
Simple extension of javax.servlet.http.HttpServlet which treats its config parameters (init-param entries within the servlet tag in web.xml) as bean properties.

A handy superclass for any type of servlet. Type conversion of config parameters is automatic, with the corresponding setter method getting invoked with the converted value. It is also possible for subclasses to specify required properties. Parameters without matching bean property setter will simply be ignored.

This servlet leaves request handling to subclasses, inheriting the default behavior of HttpServlet (doGet, doPost, etc).

This generic servlet base class has no dependency on the Spring org.springframework.context.ApplicationContext concept. Simple servlets usually don't load their own context but rather access service beans from the Spring root application context, accessible via the filter's HttpServletBean.getServletContext() ServletContext (see org.springframework.web.context.support.WebApplicationContextUtils ).

The FrameworkServlet class is a more specific servlet base class which loads its own application context. FrameworkServlet serves as direct base class of Spring's full-fledged DispatcherServlet .
author:
   Rod Johnson
author:
   Juergen Hoeller
See Also:   HttpServletBean.addRequiredProperty
See Also:   HttpServletBean.initServletBean
See Also:   HttpServletBean.doGet
See Also:   HttpServletBean.doPost



Field Summary
final protected  Loglogger
    


Method Summary
final protected  voidaddRequiredProperty(String property)
     Subclasses can invoke this method to specify that this property (which must match a JavaBean property they expose) is mandatory, and must be supplied as a config parameter.
final public  ServletContextgetServletContext()
     Overridden method that simply returns null when no ServletConfig set yet.
final public  StringgetServletName()
     Overridden method that simply returns null when no ServletConfig set yet.
final public  voidinit()
     Map config parameters onto bean properties of this servlet, and invoke subclass initialization.
protected  voidinitBeanWrapper(BeanWrapper bw)
     Initialize the BeanWrapper for this HttpServletBean, possibly with custom editors.
protected  voidinitServletBean()
     Subclasses may override this to perform custom initialization.

Field Detail
logger
final protected Log logger(Code)
Logger available to subclasses





Method Detail
addRequiredProperty
final protected void addRequiredProperty(String property)(Code)
Subclasses can invoke this method to specify that this property (which must match a JavaBean property they expose) is mandatory, and must be supplied as a config parameter. This should be called from the constructor of a subclass.

This method is only relevant in case of traditional initialization driven by a ServletConfig instance.
Parameters:
  property - name of the required property




getServletContext
final public ServletContext getServletContext()(Code)
Overridden method that simply returns null when no ServletConfig set yet.
See Also:   HttpServletBean.getServletConfig()



getServletName
final public String getServletName()(Code)
Overridden method that simply returns null when no ServletConfig set yet.
See Also:   HttpServletBean.getServletConfig()



init
final public void init() throws ServletException(Code)
Map config parameters onto bean properties of this servlet, and invoke subclass initialization.
throws:
  ServletException - if bean properties are invalid (or requiredproperties are missing), or if subclass initialization fails.



initBeanWrapper
protected void initBeanWrapper(BeanWrapper bw) throws BeansException(Code)
Initialize the BeanWrapper for this HttpServletBean, possibly with custom editors.

This default implementation is empty.
Parameters:
  bw - the BeanWrapper to initialize
throws:
  BeansException - if thrown by BeanWrapper methods
See Also:   org.springframework.beans.BeanWrapper.registerCustomEditor




initServletBean
protected void initServletBean() throws ServletException(Code)
Subclasses may override this to perform custom initialization. All bean properties of this servlet will have been set before this method is invoked.

This default implementation is empty.
throws:
  ServletException - if subclass initialization fails




Methods inherited from javax.servlet.http.HttpServlet
protected void doDelete(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException(Code)(Java Doc)
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException(Code)(Java Doc)
protected void doHead(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException(Code)(Java Doc)
protected void doOptions(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException(Code)(Java Doc)
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException(Code)(Java Doc)
protected void doPut(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException(Code)(Java Doc)
protected void doTrace(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException(Code)(Java Doc)
protected long getLastModified(HttpServletRequest req)(Code)(Java Doc)
protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException(Code)(Java Doc)
public void service(ServletRequest req, ServletResponse res) throws ServletException, IOException(Code)(Java Doc)

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