Servlet (javax.servlet)
	ServletConfig GETSERVLETCONFIG() * GETSERVLETINFO()
HttpServlet (javax.servlet.http)
	DOGET(HttpServletRequest req, HttpServeltResponse res) throw IOException
	DOPOST() * DOPUT() * DODELETE() * DOOPTIONS() * DOTRACE() * void LOG()
ServletConfig (javax.servlet)
	String GETINITPARAMETER(String name)*Enumeration GETINITPARAMETERNAMES()
	ServletContext GETSERVLETCONTEXT()
ServletContext (javax.servlet)
	Object GETATTRIBUTE(String name) * Enumeration GETATTRIBUTENAMES()
	void REMOVEATTRIBUTE(String name) 
	void SETATTRIBUTE(String name, Object object)
	String GETINITPARAMETER(String name)*Enumeration GETINITPARAMETERNAMES()
	ServletContext GETCONTEXT(String url)
	RequestDispatcher GETNAMEDDISPATCHER(String name)
	RequestDispatcher GETREQUESTDISPATCHER(String path)
	void LOG(String msg) *void LOG(String message, Throwable throwable)
ServletContextAttributeListener (javax.servlet)
	void ATTRIBUTEADDED(ServletContextAttributeEvent scab)
	void ATTRIBUTEREMOVED(ServletContextAttributeEvent scab)
	void ATTRIBUTEREPLACED(ServletContextAttributeEvent scab)
ServletContextListener (javax.servlet)
	CONTEXTDESTROYED() * CONTEXTINITIALIZED()
ServletRequest (javax.servlet)
	Object GETATTRIBUTE(String name) * Enumeration GETATTRIBUTENAMES()
	void REMOVEATTRIBUTE(String name) * SETATTRIBUTE(String name, Object o)
	String GETPARAMETER(String name) * Enumeration GETPARAMETERNAMES()
	String[] GETPARAMETERVALUES(String name)
	RequestDispatcher GETREQUESTDISPATCHER(String path)
HttpServletRequest (javax.servlet.http)
	String GETHEADER(String name) * Enumeration GETHEADERNAMES()
	Enumeration GETHEADERS(String name) * int GETINTHEADER(String name)
	String GETMETHOD() * HttpSession GETSESSION()
	HttpSession GETSESSION(boolean create) * Principal GETUSERPRINCIPAL()
	boolean ISSECURE()
ServletResponse (javax.servlet) 
	SETCONTENTTYPE(String type) * PrintWriter GETWRITER()*void FLUSHBUFFER()
HttpServletResponse (javax.servlet.http)
	fields: SC_NOT_FOUND, SC_NOT_ACCEPTABLE
	void ADDCOOKIE(Cookie cookie) *void ADDHEADER(String name, String value)
	void ADDINTHEADER(String name, int value)
	boolean CONTAINSHEADER(String name)*String ENCODEREDIRECTURL(String url)
	String ENCODEURL(String url) * void SENDERROR(int sc)
	void SENDERROR(int sc, String msg) * void SENDREDIRECT(String location)
	void SETHEADER(String name, String value)
	void SETINTHEADER(String name, int value) * void SETSTATUS(int sc)
ServletContextAttributeEvent (javax.servlet)
	GETNAME() * GETVALUE()
ServletContextEvent (javax.servlet)
	GETSERVLETCONTEXT()
HttpSession (javax.servlet.http)
	GETATTRIBUTE() * SETATTRIBUTE() * void SETMAXINACTIVEINTERVAL(int secs)
//for distributed environments
HttpSessionActivationListener (javax.servlet.http)
	SESSIONDIDACTIVATE() * SESSIONWILLPASSIVATE()
HttpSessionAttributeListener (javax.servlet.http)
	ATTRIBUTEADDED() * ATTRIBUTEREMOVED() *	ATTRIBUTEREPLACED()
//notification when session attributes added or removed
HttpSessionBindingListener (javax.servlet.http)
	VALUEBOUND() * VALUEUNBOUND()
HttpSessionListener (javax.servlet.http)
	SESSIONCREATED() * SESSIONDESTROYED()
Principal
	GETNAME()
PageContext
	GETATTRIBUTE() * GETOUT() * GETSESSION() * GETSERVLETCONFIG()
	GETSERVLETCONTEXT()
RequestDispatcher
	INCLUDE() * FORWARD()
*******************************************************************************
BodyTag <Interface>
	DOINITBODY()
BodyTagSupport <Class> implements BodyTag fields:BODYCONTENT
	doafterbody(), doendtag(), doinitbody(), dostarttag(), getbodycontent(),
	getparent(), getpreviousout(), release()
IterationTag <Interface> fields:EVAL_BODY_AGAIN
	DOAFTERBODY(ret eval_body_again, skip_body)
Tag <Interface> fields:EVAL_PAGE, SKIP_BODY, SKIP_PAGE
	DOENDTAG(ret eval_page, skip_page), 
	DOSTARTTAG(ret eval_body_include, skip_body), 
	GETPARENT(), RELEASE()
TagSupport <Class> implements Tag, IterationTag
	doafterbody(), doendtag(), dostarttag(), getparent(), release()	
Tag handler methods
	findAncestorWithClass(), findAttribute(), getAttribute(), 
	getAttributeNamesInScope(), getAttributeScope(), getException(), 
	getOut(), getPage(), getParent(), getRequest(), getResponse(), 
	getSession(), getServletConfig(), getServletContext(), removeAttribute()
	setAttribute()
	
***DESIGN PATTERNS***
-Value Object: Reduces net traffic caching remote objects as a proxy
-Business Delegate:
-Data Access Object:
-Front Component: Single entry point to a Web Site or service. Simpler GUI
-Model-View-Controller: Decouple presentation from core data access functional.

***Web–App Elements***
CONTEXT_PARAM(param-name, param-value, description), 
ERROR-PAGE(error-code, exception-type, location), INIT-PARAM, 
LISTENER(listener-class), 
LOGIN-CONFIG(auth-method<NONE, BASIC, DIGEST, FORM, CLIENT-CERT>,
	form-login-config(form-login-page, form-error-page)),
SECURITY-CONSTRAINT(resource-ref, web-resource-collection(
	http-method, web-resource-name)), SECURITY-ROLE(role-name, description),
SERVLET, SERVLET-CLASS, SERVLET-MAPPING, SESSION-CONFIG(session-timeout<min>), 
TAG(name, tagClass, info, attribute(name, rtexprvalue, required))
TAGLIB(taglib-uri, taglib-location), 
USER-DATA-CONSTRAINT(transport-guarantee)
***Scriptlet*******************************************************************
TRANSLATION, COMPILATION, LOAD CLASS, CREATE INSTANCE, jspInit, _jspService,
jspDestroy
<%@ page (import, session(def. true), errorPage, isErrorPage, contentType,
	isThreadSafe) = ...%>
<%@ include file = "a.html"%> = <jsp:directive.include ..."/> (at translation)
		    <jsp:include page = "a.html/> (at request)
<%@ page ...%> = <jsp:directive.page .../> 
<%! %> = <jsp:declaration>
<%= %>(never end with semicolon) = <jsp:expression>
***Bean************************************************************************
<jsp:useBean id="myBean" class="com.MyBeanInst" scope="(page(def.), request, 
	session, application)" type="com.MyBean"/>
<jsp:getProperty name="myBean" property="size"/>
<jsp:getProperty id="myBean" property="size"/>
***Tag library*****************************************************************
<@ taglib uri="/stsTagLibrary" prefix="stsLib">
<stsLib:test />, <stsLib:test>pippo</stsLib:test>
<yourLibrary:whatColorIsIt color="red"/>
*******
source, container passes the line to the client as is:	<!-Que<%="Reader"%>->
output: Que Reader