com.caucho.jsp
Class JavaPage

java.lang.Object
  |
  +--com.caucho.jsp.Page
        |
        +--com.caucho.jsp.JavaPage
All Implemented Interfaces:
CauchoPage, HttpJspPage, JspPage, Servlet, ServletConfig

public abstract class JavaPage
extends Page
implements HttpJspPage


Fields inherited from class com.caucho.jsp.Page
alwaysModified, contentType, dbg, neverModified
 
Constructor Summary
JavaPage()
           
 
Method Summary
abstract  void _jspService(HttpServletRequest request, HttpServletResponse response)
          The _jspService()method corresponds to the body of the JSP page.
 void destroy()
          Called by the servlet container to indicate to a servlet that the servlet is being taken out of service.
 java.lang.String getServletInfo()
          Returns information about the servlet, such as author, version, and copyright.
 void init(ServletConfig config)
          Called by the servlet container to indicate to a servlet that the servlet is being placed into service.
 void jspDestroy()
          The jspDestroy() method is invoked when the JSP page is about to be destroyed.
 void jspInit()
          The jspInit() method is invoked when the JSP page is initialized.
 void service(ServletRequest request, ServletResponse response)
          Called by the servlet container to allow the servlet to respond to a request.
 
Methods inherited from class com.caucho.jsp.Page
_caucho_addCacheDepend, _caucho_addDepend, _caucho_addDepend, _caucho_getLineMap, _caucho_init, _caucho_isModified, _caucho_lastModified, _caucho_setAlwaysModified, _caucho_setCacheable, _caucho_setContentType, _caucho_setModified, _caucho_setNeverModified, calculateLastModified, cauchoIsModified, getInitParameter, getInitParameterNames, getLastModified, getServletConfig, getServletContext, getServletName, init, isDead, log, log, subservice
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface javax.servlet.Servlet
getServletConfig
 

Constructor Detail

JavaPage

public JavaPage()
Method Detail

init

public void init(ServletConfig config)
          throws ServletException
Description copied from interface: Servlet
Called by the servlet container to indicate to a servlet that the servlet is being placed into service.

The servlet container calls the init method exactly once after instantiating the servlet. The init method must complete successfully before the servlet can receive any requests.

The servlet container cannot place the servlet into service if the init method

  1. Throws a ServletException
  2. Does not return within a time period defined by the Web server
Specified by:
init in interface Servlet
Overrides:
init in class Page
Following copied from interface: javax.servlet.Servlet
Parameters:
config - a ServletConfig object containing the servlet's configuration and initialization parameters
Throws:
ServletException - if an exception has occurred that interferes with the servlet's normal operation
See Also:
UnavailableException, Servlet.getServletConfig()

jspInit

public void jspInit()
Description copied from interface: JspPage
The jspInit() method is invoked when the JSP page is initialized. It is the responsibility of the JSP implementation (and of the class mentioned by the extends attribute, if present) that at this point invocations to the getServletConfig() method will return the desired value. A JSP page can override this method by including a definition for it in a declaration element. A JSP page should redefine the init() method from Servlet.
Specified by:
jspInit in interface JspPage

service

public void service(ServletRequest request,
                    ServletResponse response)
             throws ServletException,
                    java.io.IOException
Description copied from interface: Servlet
Called by the servlet container to allow the servlet to respond to a request.

This method is only called after the servlet's init() method has completed successfully.

The status code of the response always should be set for a servlet that throws or sends an error.

Servlets typically run inside multithreaded servlet containers that can handle multiple requests concurrently. Developers must be aware to synchronize access to any shared resources such as files, network connections, and as well as the servlet's class and instance variables. More information on multithreaded programming in Java is available in the Java tutorial on multi-threaded programming.

Specified by:
service in interface Servlet
Following copied from interface: javax.servlet.Servlet
Parameters:
req - the ServletRequest object that contains the client's request
res - the ServletResponse object that contains the servlet's response
Throws:
ServletException - if an exception occurs that interferes with the servlet's normal operation
java.io.IOException - if an input or output exception occurs

_jspService

public abstract void _jspService(HttpServletRequest request,
                                 HttpServletResponse response)
                          throws ServletException,
                                 java.io.IOException
Description copied from interface: HttpJspPage
The _jspService()method corresponds to the body of the JSP page. This method is defined automatically by the JSP container and should never be defined by the JSP page author.

If a superclass is specified using the extends attribute, that superclass may choose to perform some actions in its service() method before or after calling the _jspService() method. See using the extends attribute in the JSP_Engine chapter of the JSP specification.

Specified by:
_jspService in interface HttpJspPage

getServletInfo

public java.lang.String getServletInfo()
Description copied from interface: Servlet
Returns information about the servlet, such as author, version, and copyright.

The string that this method returns should be plain text and not markup of any kind (such as HTML, XML, etc.).

Specified by:
getServletInfo in interface Servlet
Overrides:
getServletInfo in class Page
Following copied from interface: javax.servlet.Servlet
Returns:
a String containing servlet information

destroy

public void destroy()
Description copied from interface: Servlet
Called by the servlet container to indicate to a servlet that the servlet is being taken out of service. This method is only called once all threads within the servlet's service method have exited or after a timeout period has passed. After the servlet container calls this method, it will not call the service method again on this servlet.

This method gives the servlet an opportunity to clean up any resources that are being held (for example, memory, file handles, threads) and make sure that any persistent state is synchronized with the servlet's current state in memory.

Specified by:
destroy in interface Servlet
Overrides:
destroy in class Page

jspDestroy

public void jspDestroy()
Description copied from interface: JspPage
The jspDestroy() method is invoked when the JSP page is about to be destroyed. A JSP page can override this method by including a definition for it in a declaration element. A JSP page should redefine the destroy() method from Servlet.
Specified by:
jspDestroy in interface JspPage