Class JspServlet
java.lang.Object
jakarta.servlet.GenericServlet
jakarta.servlet.http.HttpServlet
org.apache.jasper.servlet.JspServlet
- All Implemented Interfaces:
Servlet,ServletConfig,Serializable,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:
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Field Summary
Fields inherited from class jakarta.servlet.http.HttpServlet
LEGACY_DO_HEAD -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoiddestroy()Called by the servlet container to indicate to a servlet that the servlet is being taken out of service.intReturns 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.intGets the number of JSPs that are in the JSP limiter queueintGets the number of JSPs that have been reloaded.intGets 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.voidExecute 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 jakarta.servlet.http.HttpServlet
doDelete, doGet, doHead, doOptions, doPost, doPut, doTrace, getLastModified, serviceMethods inherited from class jakarta.servlet.GenericServlet
getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, init, log, log
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Constructor Details
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JspServlet
public JspServlet()
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Method Details
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init
Description copied from class:jakarta.servlet.GenericServletCalled by the servlet container to indicate to a servlet that the servlet is being placed into service. SeeServlet.init(jakarta.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 interfaceServlet- Overrides:
initin classHttpServlet- Parameters:
config- theServletConfigobject that contains configuration information for this servlet- Throws:
ServletException- if an exception occurs that interrupts the servlet's normal operation- See Also:
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getJspCount
public 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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setJspReloadCount
public void setJspReloadCount(int count) Resets the JSP reload counter.- Parameters:
count- Value to which to reset the JSP reload counter
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getJspReloadCount
public 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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getJspQueueLength
public 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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getJspUnloadCount
public 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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service
public void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException Description copied from class:jakarta.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(jakarta.servlet.ServletRequest, jakarta.servlet.ServletResponse)method. There's no need to override this method.- Overrides:
servicein classHttpServlet- Parameters:
request- theHttpServletRequestobject that contains the request the client made of the servletresponse- theHttpServletResponseobject that contains the response the servlet returns to the client- Throws:
ServletException- if the HTTP request cannot be handledIOException- if an input or output error occurs while the servlet is handling the HTTP request- See Also:
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destroy
public void destroy()Description copied from class:jakarta.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 interfaceServlet- Overrides:
destroyin classGenericServlet
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periodicEvent
public void periodicEvent()Description copied from interface:PeriodicEventListenerExecute a periodic task, such as reloading, etc.- Specified by:
periodicEventin interfacePeriodicEventListener
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