Apache Tomcat 6.0.39

org.apache.jasper.servlet
Class JspServlet

java.lang.Object
  extended by javax.servlet.GenericServlet
      extended by javax.servlet.http.HttpServlet
          extended by org.apache.jasper.servlet.JspServlet
All Implemented Interfaces:
java.io.Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig, PeriodicEventListener

public class JspServlet
extends javax.servlet.http.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
JspServlet()
           
 
Method Summary
 void destroy()
          Called by the servlet container to indicate to a servlet that the servlet is being taken out of service.
 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 getJspReloadCount()
          Gets the number of JSPs that have been reloaded.
 void init(javax.servlet.ServletConfig config)
          Called by the servlet container to indicate to a servlet that the servlet is being placed into service.
 void periodicEvent()
          Execute a periodic task, such as reloading, etc.
 void service(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)
          Receives standard HTTP requests from the public service method and dispatches them to the doXXX methods defined in this class.
 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(javax.servlet.ServletConfig config)
          throws javax.servlet.ServletException
Description copied from class: javax.servlet.GenericServlet
Called by the servlet container to indicate to a servlet that the servlet is being placed into service. See Servlet.init(javax.servlet.ServletConfig).

This implementation stores the ServletConfig object it receives from the servlet container for later use. When overriding this form of the method, call super.init(config).

Specified by:
init in interface javax.servlet.Servlet
Overrides:
init in class javax.servlet.GenericServlet
Parameters:
config - the ServletConfig object that contains configutation information for this servlet
Throws:
javax.servlet.ServletException - if an exception occurs that interrupts the servlet's normal operation
See Also:
UnavailableException

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

service

public void service(javax.servlet.http.HttpServletRequest request,
                    javax.servlet.http.HttpServletResponse response)
             throws javax.servlet.ServletException,
                    java.io.IOException
Description copied from class: javax.servlet.http.HttpServlet
Receives standard HTTP requests from the public service method and dispatches them to the doXXX methods defined in this class. This method is an HTTP-specific version of the Servlet.service(javax.servlet.ServletRequest, javax.servlet.ServletResponse) method. There's no need to override this method.

Overrides:
service in class javax.servlet.http.HttpServlet
Parameters:
request - the HttpServletRequest object that contains the request the client made of the servlet
response - the HttpServletResponse object that contains the response the servlet returns to the client
Throws:
javax.servlet.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)

destroy

public void destroy()
Description copied from class: javax.servlet.GenericServlet
Called by the servlet container to indicate to a servlet that the servlet is being taken out of service. See Servlet.destroy().

Specified by:
destroy in interface javax.servlet.Servlet
Overrides:
destroy in class javax.servlet.GenericServlet

periodicEvent

public void periodicEvent()
Description copied from interface: PeriodicEventListener
Execute a periodic task, such as reloading, etc.

Specified by:
periodicEvent in interface PeriodicEventListener

Apache Tomcat 6.0.39

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