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