org.apache.jasper.servlet

Class JspServlet

java.lang.Object

javax.servlet.GenericServlet

javax.servlet.http.HttpServlet

org.apache.jasper.servlet.JspServlet

All Implemented Interfaces:

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

Constructor Summary

Constructors

Constructor and Description
JspServlet()

Method Summary

Modifier and Type	Method and Description
void	destroy()
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.
int	getJspQueueLength() Gets the number of JSPs that are in the JSP limiter queue
int	getJspReloadCount() Gets the number of JSPs that have been reloaded.
int	getJspUnloadCount() Gets the number of JSPs that have been unloaded.
void	init(ServletConfig config)
void	periodicEvent() Execute a periodic task, such as reloading, etc.
void	service(HttpServletRequest request, HttpServletResponse response)
void	setJspReloadCount(int count) Resets the JSP reload counter.

Methods inherited from class javax.servlet.http.HttpServlet

doDelete, doGet, doHead, doOptions, doPost, doPut, doTrace, getLastModified, service

Methods inherited from class javax.servlet.GenericServlet

getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, init, log, log

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

JspServlet

public JspServlet()

Method Detail

init

public void init(ServletConfig config)
          throws ServletException

Specified by:

init in interface Servlet

Overrides:

init in class GenericServlet

Throws:

ServletException

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

setJspReloadCount

public void setJspReloadCount(int count)

Resets the JSP reload counter.

Parameters:

count - Value to which to reset the JSP reload counter

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

getJspQueueLength

public int getJspQueueLength()

Gets the number of JSPs that are in the JSP limiter queue

This 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

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

service

public void service(HttpServletRequest request,
                    HttpServletResponse response)
             throws ServletException,
                    IOException

Overrides:

service in class HttpServlet

Throws:

ServletException

IOException

destroy

public void destroy()

Specified by:

destroy in interface Servlet

Overrides:

destroy in class GenericServlet

periodicEvent

public void periodicEvent()

Description copied from interface: PeriodicEventListener

Execute a periodic task, such as reloading, etc.

Specified by:

periodicEvent in interface PeriodicEventListener