Package org.apache.jasper.servlet
Class JspServlet
- java.lang.Object
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- javax.servlet.GenericServlet
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- javax.servlet.http.HttpServlet
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- org.apache.jasper.servlet.JspServlet
 
 
 
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- All Implemented Interfaces:
- java.io.Serializable,- Servlet,- ServletConfig,- PeriodicEventListener
 
 public class JspServlet extends HttpServlet implements PeriodicEventListener The JSP engine (a.k.a Jasper). The servlet container is responsible for providing a URLClassLoader for the web application context Jasper is being used in. Jasper will try get the Tomcat ServletContext attribute for its ServletContext class loader, if that fails, it uses the parent class loader. In either case, it must be a URLClassLoader.- Author:
- Anil K. Vijendran, Harish Prabandham, Remy Maucherat, Kin-man Chung, Glenn Nielsen
- See Also:
- Serialized Form
 
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Constructor SummaryConstructors Constructor Description JspServlet()
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Method SummaryAll Methods Instance Methods Concrete Methods Modifier and Type Method Description voiddestroy()Called by the servlet container to indicate to a servlet that the servlet is being taken out of service.intgetJspCount()Returns the number of JSPs for which JspServletWrappers exist, i.e., the number of JSPs that have been loaded into the webapp with which this JspServlet is associated.intgetJspQueueLength()Gets the number of JSPs that are in the JSP limiter queueintgetJspReloadCount()Gets the number of JSPs that have been reloaded.intgetJspUnloadCount()Gets the number of JSPs that have been unloaded.voidinit(ServletConfig config)Called by the servlet container to indicate to a servlet that the servlet is being placed into service.voidperiodicEvent()Execute a periodic task, such as reloading, etc.voidservice(HttpServletRequest request, HttpServletResponse response)Receives standard HTTP requests from the publicservicemethod and dispatches them to thedoMethod methods defined in this class.voidsetJspReloadCount(int count)Resets the JSP reload counter.- 
Methods inherited from class javax.servlet.http.HttpServletdoDelete, doGet, doHead, doOptions, doPost, doPut, doTrace, getLastModified, service
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Methods inherited from class javax.servlet.GenericServletgetInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, init, log, log
 
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Method Detail- 
initpublic void init(ServletConfig config) throws ServletException Description copied from class:javax.servlet.GenericServletCalled by the servlet container to indicate to a servlet that the servlet is being placed into service. SeeServlet.init(javax.servlet.ServletConfig).This implementation stores the ServletConfigobject it receives from the servlet container for later use. When overriding this form of the method, callsuper.init(config).- Specified by:
- initin interface- Servlet
- Overrides:
- initin class- GenericServlet
- Parameters:
- config- the- ServletConfigobject that contains configuration information for this servlet
- Throws:
- ServletException- if an exception occurs that interrupts the servlet's normal operation
- See Also:
- UnavailableException
 
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getJspCountpublic int getJspCount() Returns the number of JSPs for which JspServletWrappers exist, i.e., the number of JSPs that have been loaded into the webapp with which this JspServlet is associated.This info may be used for monitoring purposes. - Returns:
- The number of JSPs that have been loaded into the webapp with which this JspServlet is associated
 
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setJspReloadCountpublic void setJspReloadCount(int count) Resets the JSP reload counter.- Parameters:
- count- Value to which to reset the JSP reload counter
 
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getJspReloadCountpublic int getJspReloadCount() Gets the number of JSPs that have been reloaded.This info may be used for monitoring purposes. - Returns:
- The number of JSPs (in the webapp with which this JspServlet is associated) that have been reloaded
 
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getJspQueueLengthpublic int getJspQueueLength() Gets the number of JSPs that are in the JSP limiter queueThis info may be used for monitoring purposes. - Returns:
- The number of JSPs (in the webapp with which this JspServlet is associated) that are in the JSP limiter queue
 
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getJspUnloadCountpublic int getJspUnloadCount() Gets the number of JSPs that have been unloaded.This info may be used for monitoring purposes. - Returns:
- The number of JSPs (in the webapp with which this JspServlet is associated) that have been unloaded
 
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servicepublic void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, java.io.IOException Description copied from class:javax.servlet.http.HttpServletReceives standard HTTP requests from the publicservicemethod and dispatches them to thedoMethod methods defined in this class. This method is an HTTP-specific version of theServlet.service(javax.servlet.ServletRequest, javax.servlet.ServletResponse)method. There's no need to override this method.- Overrides:
- servicein class- HttpServlet
- Parameters:
- request- the- HttpServletRequestobject that contains the request the client made of the servlet
- response- the- HttpServletResponseobject that contains the response the servlet returns to the client
- Throws:
- ServletException- if the HTTP request cannot be handled
- java.io.IOException- if an input or output error occurs while the servlet is handling the HTTP request
- See Also:
- Servlet.service(javax.servlet.ServletRequest, javax.servlet.ServletResponse)
 
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destroypublic void destroy() Description copied from class:javax.servlet.GenericServletCalled by the servlet container to indicate to a servlet that the servlet is being taken out of service. SeeServlet.destroy().- Specified by:
- destroyin interface- Servlet
- Overrides:
- destroyin class- GenericServlet
 
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periodicEventpublic void periodicEvent() Description copied from interface:PeriodicEventListenerExecute a periodic task, such as reloading, etc.- Specified by:
- periodicEventin interface- PeriodicEventListener
 
 
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