Why jsp is converted into servlet?

hi,
Why the jsp is converted into servlet in the container? reason? why cant is evalute as a jsp file itself? why did not they develope a seperate container for jsp?

hi :-)
Why the jsp is converted into servlet in the container? reason? why cant is evalute as a jsp file itself?
JSP is an extension of servlet technology :-)
why did not they develope a seperate container for jsp?
Note: (an excerpt from a book)
"Inside the JSP container is a special servlet called the page compiler.
The servlet container is configured to forward to this page compiler all HTTP
requests with URLs that match the .jsp file extension.
This page compiler turns a servlet container into a JSP container.
When a .jsp page is first called, the page compiler parses and compiles
the .jsp page into a servlet class. If the compilation is successful,
the jsp servlet class is loaded into memory. On subsequent calls,
the servlet class for that .jsp page is already in memory; however, it could have been updated.
Therefore, the page compiler servlet will always
compare the timestamp of the jsp servlet with the jsp page. If the .jsp page
is more current, recompilation is necessary. With this process, once
deployed, JSP pages only go through the time-consuming compilation
process once"
For more info you can refer to the packages: javax.servlet.jsp and
javax.servlet.jsp.tagext
and also the two servlet packages: javax.servlet and javax.servlet.http
you might be asking why refer to servlet packages? because JSP needs it :-)
as i mention earlier, JSP is an extension of servlet technology.
hope other's will also give answer about your question.
regards,

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I am trying to convert this Servlet into JSP page.
How do I go about doing this?
Thanks.
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;
import java.text.*;
/** Shows all items currently in ShoppingCart. Clients
* have their own session that keeps track of which
* ShoppingCart is theirs. If this is their first visit
* to the order page, a new shopping cart is created.
* Usually, people come to this page by way of a page
* showing catalog entries, so this page adds an additional
* item to the shopping cart. But users can also
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* or be sent back to it by clicking on the "Update Order"
* button after changing the number of items ordered.
* <P>
* Taken from Core Servlets and JavaServer Pages 2nd Edition
* from Prentice Hall and Sun Microsystems Press,
* http://www.coreservlets.com/.
* © 2003 Marty Hall; may be freely used or adapted.
public class OrderPage extends HttpServlet {
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
HttpSession session = request.getSession();
ShoppingCart cart;
synchronized(session) {
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// Previous visitors keep using their existing cart.
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request.getParameter("numItems");
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// Note that specifying a number of 0 results
// in item being deleted from cart.
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numItems = Integer.parseInt(numItemsString);
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response.setContentType("text/html");
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"Transitional//EN\">\n";
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"<HTML>\n" +
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"<BODY BGCOLOR=\"#FDF5E6\">\n" +
"<H1 ALIGN=\"CENTER\">" + title + "</H1>");
synchronized(session) {
List itemsOrdered = cart.getItemsOrdered();
if (itemsOrdered.size() == 0) {
out.println("<H2><I>No items in your cart...</I></H2>");
} else {
// If there is at least one item in cart, show table
// of items ordered.
out.println
("<TABLE BORDER=1 ALIGN=\"CENTER\">\n" +
"<TR BGCOLOR=\"#FFAD00\">\n" +
" <TH>Item ID<TH>Description\n" +
" <TH>Unit Cost<TH>Number<TH>Total Cost");
ItemOrder order;
// Rounds to two decimal places, inserts dollar
// sign (or other currency symbol), etc., as
// appropriate in current Locale.
NumberFormat formatter =
NumberFormat.getCurrencyInstance();
// For each entry in shopping cart, make
// table row showing ID, description, per-item
// cost, number ordered, and total cost.
// Put number ordered in textfield that user
// can change, with "Update Order" button next
// to it, which resubmits to this same page
// but specifying a different number of items.
for(int i=0; i<itemsOrdered.size(); i++) {
order = (ItemOrder)itemsOrdered.get(i);
out.println
("<TR>\n" +
" <TD>" + order.getItemID() + "\n" +
" <TD>" + order.getShortDescription() + "\n" +
" <TD>" +
formatter.format(order.getUnitCost()) + "\n" +
" <TD>" +
"<FORM>\n" + // Submit to current URL
"<INPUT TYPE=\"HIDDEN\" NAME=\"itemID\"\n" +
" VALUE=\"" + order.getItemID() + "\">\n" +
"<INPUT TYPE=\"TEXT\" NAME=\"numItems\"\n" +
" SIZE=3 VALUE=\"" +
order.getNumItems() + "\">\n" +
"<SMALL>\n" +
"<INPUT TYPE=\"SUBMIT\"\n "+
" VALUE=\"Update Order\">\n" +
"</SMALL>\n" +
"</FORM>\n" +
" <TD>" +
formatter.format(order.getTotalCost()));
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response.encodeURL("../Checkout.html");
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("</TABLE>\n" +
"<FORM ACTION=\"" + checkoutURL + "\">\n" +
"<BIG><CENTER>\n" +
"<INPUT TYPE=\"SUBMIT\"\n" +
" VALUE=\"Proceed to Checkout\">\n" +
"</CENTER></BIG></FORM>");
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}

Sorry.
actually this is my coding on the bottom.
Pleease disregard my previous coding. I got the different one.
My first approach is using <% %> around the whole doGet method such as:
<%
String[] ids = { "hall001", "hall002" };
setItems(ids);
setTitle("All-Time Best Computer Books");
out.println("<HR>\n</BODY></HTML>");
%>
I am not sure how to break between code between
return;
and
response.setContentType("text/html");
Here is my coding:
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException
     String[] ids = { "hall001", "hall002" };
     setItems(ids);
     setTitle("All-Time Best Computer Books");
if (items == null) {
response.sendError(response.SC_NOT_FOUND,
"Missing Items.");
return;
response.setContentType("text/html");
PrintWriter out = response.getWriter();
String docType =
"<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 " +
"Transitional//EN\">\n";
out.println(docType +
"<HTML>\n" +
"<HEAD><TITLE>" + title + "</TITLE></HEAD>\n" +
"<BODY BGCOLOR=\"#FDF5E6\">\n" +
"<H1 ALIGN=\"CENTER\">" + title + "</H1>");
CatalogItem item;
for(int i=0; i<items.length; i++) {
out.println("<HR>");
item = items;
if (item == null) {
out.println("<FONT COLOR=\"RED\">" +
"Unknown item ID " + itemIDs[i] +
"</FONT>");
} else {
out.println();
String formURL =
"/servlet/coreservlets.OrderPage";
formURL = response.encodeURL(formURL);
out.println
("<FORM ACTION=\"" + formURL + "\">\n" +
"<INPUT TYPE=\"HIDDEN\" NAME=\"itemID\" " +
" VALUE=\"" + item.getItemID() + "\">\n" +
"<H2>" + item.getShortDescription() +
" ($" + item.getCost() + ")</H2>\n" +
item.getLongDescription() + "\n" +
"<P>\n<CENTER>\n" +
"<INPUT TYPE=\"SUBMIT\" " +
"VALUE=\"Add to Shopping Cart\">\n" +
"</CENTER>\n<P>\n</FORM>");
out.println("<HR>\n</BODY></HTML>");

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Hi,
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Hi:
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<%@ page contentType="text/html"%>
<%@ page import="java.io.File,
java.util.*,
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<%
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import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import org.jdom.*;
import org.jdom.input.*;
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import org.jdom.output.*;
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Please tell me, what is wrong!!!
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%>
<html><head><title></title></head>
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Hi
We have a set of Java servlets running on apache and jserv and not using Portal. My task is to be able to convert these into Portal.All of the existing servlets are extends/use our existing set of classes. They display a list of rows in a table as HTML with a URL pointing back to the same servlet or different servlet based on logic, with set of parameter. With my current setup (all on a Win2000 system), I have installed the JPDK samples and it is working fine, but have now got stuck in applying the concepts to my own existing servlets. So can you help me how can i convert an existing Java servlet into Portal?
First i tried the "how to build your own java portal exercise" and it runs fine. But when i tried to run simple servlet to convert into portlet, i got the following error. I am really confuse about Renderer. Is it nessessary to make Renderer or use Default Renderer? I will really thankful to you if you give me some idea.
I changed the following in to conf/jserv properties.
1. set the " <showPage class="AgeServlet"/> " in provider.xml
2. in zone property
servlet.AgeServlet.code=oracle.portal.provider.v1.http.HttpProvider
servlet.AgeServlet.initArgs=provider_root=C:\MyProvider,sessiontimeout=1800000,debuglevel=1
3. In jserv property
wrapper.classpath=C:\MyProvider\MyClasses
Where i put my AgeServlet.class
4.Stop and Start the Oracle HTTP Server.
When i try to run url(http://host.domain:port/servlet/AgeServlet) it gives me following error.
Error!
javax.servlet.ServletException: Unable to initialize new provider instance: java.lang.reflect.InvocationTargetException
My servlet is
// JDK1.2.2 module
import java.io.*;
import java.util.*;
//JSDK modules
import javax.servlet.*;
import javax.servlet.http.*;
* class to promt for the year of birth
* and calculate the age.
* @author Vipul Patel [email protected]
public class AgeServlet extends HttpServlet {
* method to call doPost
* @param request
* @param response
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws IOException, ServletException {
doPost(request, response);
* method to call calculateAge
* @param request
* @param response
public void doPost(HttpServletRequest request,
HttpServletResponse response)
throws IOException, ServletException {
getAge(request, response);
* method for display html form for get year
* and calculate the age
* @param request
* @param response
public void getAge(HttpServletRequest request,
HttpServletResponse response) {
response.setContentType("text/html");
PrintWriter out = null;
try {
out = response.getWriter();
} catch(IOException ex) {
ex.printStackTrace();
String age = calculateAge(request, response);
// create and send html form to user
out.println("<html>");
out.println("<body>");
out.println("<title>Age calculation</title>");
out.println("<form action=\"/servlets/AgeServlet\" method=get>");
out.println(age + "<br>");
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out.println("<input type=submit value=submit>");
out.println("<input type=\"reset\" value=\"reset\">");
out.println(" </form>");
out.println("</body>");
out.println("</html> ");
* calculate the age
* @param request
* @param response
* @return age
public String calculateAge(HttpServletRequest request,
HttpServletResponse response) {
String age= "";
String year="";
int curr_year;
int count_year = 0;
year = request.getParameter("ageyear");
Date date = new Date();
String today_date = date.toString();
today_date = today_date.substring(24,29);
curr_year = Integer.parseInt(today_date);
if((year != null) && (!year.equals("")) ) {
int get_year = Integer.parseInt(year);
if(get_year > curr_year) {
age = "You enterd wrong entry!!!!!";
} else {
for (int i=get_year; i<=curr_year; i++) {
count_year++;
age ="Your age is: " + String.valueOf(count_year);
} else {
age = "Enter the year of Birth";
return age;
Thank you very much!!
Vipul Patel
null

Hi
Now i changed my code and it display my contents on broweser. But when i submit the form i cannot able to forward my request to same page. Any suggestion please.
Thanks.
changed code
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import oracle.portal.provider.v1.*;
import oracle.portal.provider.v1.http.*;
public class AgeServlet extends HttpServlet {
* Initialize global variables
public void init(ServletConfig config) throws ServletException {
super.init(config);
* Process the HTTP Post request
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException,
IOException {
doGet(request,response);
* Get Servlet information
* @return java.lang.String
public String getServletInfo() {
return "AgeServlet Information";
* Process the HTTP Get request
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException,
IOException {
PortletRenderRequest pr = (PortletRenderRequest)request.getAttribute(HttpProvider.PORTLET_RENDER_REQUEST);
try {
renderShow(pr);
} catch (Exception e) {
private void renderShow(PortletRenderRequest pr)
throws PortletException {
try {
/*HttpServletRequest request = (HttpServletRequest)
pr.getAttribute(HttpProvider.SERVLET_REQUEST);
HttpServletResponse response = (HttpServletResponse)
pr.getAttribute(HttpProvider.SERVLET_RESPONSE); */
PrintWriter out = pr.getWriter();
pr.setContentType("text/html; charset=WINDOWS-1252");
pr.setContentType("text/html");
//PrintWriter out = response.getWriter();
// create and send html form to user
out.println("<html>");
out.println("<body>");
out.println("<title>Age calculation</title>");
out.println("<form method=\"POST\" action=\""+HttpPortletRendererUtil.htmlFormActionLink(pr,PortletRendererUtil.PAGE_LINK) +"\">");
HttpPortletRendererUtil.htmlFormHiddenFields(pr,PortletRendererUtil.PAGE_LINK);
String ageParam = HttpPortletRendererUtil.portletParameter(pr, "ageyear");
String submitParam = HttpPortletRendererUtil.portletParameter(pr, "mySubmit");
out.println("Enter the Year of Birth<input type=\"text\" name=\" + ageParam + \"><br>");
out.println("<input type=\"submit\" name=\" + submitParam + \" value=\"submit\">");
out.println(" </form>");
out.println("</body>");
out.println("</html> ");
if (pr.getParameter(submitParam) != null ) {
out.println("You are "+ calculateAge(pr,out));
} catch (Exception e) {
* calculate the age
* @param request
* @param response
* @return age
public String calculateAge(PortletRenderRequest pr, PrintWriter out) {
String age= "";
String year="";
int curr_year;
int count_year = 0;
year = pr.getParameter("ageParam");
Calendar rightNow = Calendar.getInstance();
curr_year = rightNow.get(Calendar.YEAR);
if((year != null) && (!year.equals(""))) {
int get_year = Integer.parseInt(year);
if(get_year > curr_year) {
age = "You enterd wrong entry!!!!!";
} else {
count_year = curr_year - get_year;
age = String.valueOf(count_year);
} else {
age = "Enter the year of Birth";
return age;
Error message
Wed, 08 Aug 2001 00:04:55 GMT
No DAD configuration Found
DAD name:
PROCEDURE : !null.wwpob_page.show
URL : http://ntserver:80/pls/null/!null.wwpob_page.show?_pageid=null
PARAMETERS :
===========
ENVIRONMENT:
============
PLSQL_GATEWAY=WebDb
GATEWAY_IVERSION=2
SERVER_SOFTWARE=Oracle HTTP Server Powered by Apache/1.3.12 (Win32) ApacheJServ/1.1 mod_ssl/2.6.4 OpenSSL/0.9.5a mod_perl/1.24
GATEWAY_INTERFACE=CGI/1.1
SERVER_PORT=80
SERVER_NAME=ntserver
REQUEST_METHOD=POST
QUERY_STRING=_pageid=null
PATH_INFO=/null/!null.wwpob_page.show
SCRIPT_NAME=/pls
REMOTE_HOST=
REMOTE_ADDR=172.16.0.27
SERVER_P ROTOCOL=HTTP/1.1
REQUEST_PROTOCOL=HTTP
REMOTE_USER=
HTTP_CONTENT_LENGTH=52
HTTP_CONTENT_TYPE=application/x-www-form-urlencoded
HTTP_USER_AGENT=Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt) RPT-HTTPClient/0.3-2S
HTTP_HOST=ntserver
HTTP_ACCEPT=image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, */*
HTTP_ACCEPT_ENCODING=gzip, deflate, x-gzip, compress, x-compress
HTTP_ACCEPT_LANGUAGE=en-us
HTTP_ACCEPT_CHARSET=
HTTP_COOKIE=portal30=3.0,en,us,AMERICA,7044103775205D94AE891C2EB8EC88ECB9671CC56E5524FFBAE3419299B938639A5159BD1DF60D6A57362DA77173DED757521073FAB521072C6E83A9EDD32D5DD1E3859A48A75
9C1537468FDD6B2AF6C36692DA501614F9B;
portal30_sso=3.0,en,us,AMERICA,C62FD25D23E9A2D66948EDCD463B2CCD50050AD8D02B7EF55A61DBC14E253387C44B1A5D9668CC141CE38DD4455FEF3D28188817CC1678D8F0C1F642C95CB0E34406EFC41D4A36E1A2915
182A5FC121377E258FA76480763
Authorization=
HTTP_IF_MODIFIED_SINCE=
HTTP_REFERER=
null

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thanks in advance..

Hi simmy1,
The performance of JSP pages is very close to that of servlets. However, users may experience a perceptible delay when a JSP page is accessed for the very first time. This is because the JSP page undergoes a "translation phase" wherein it is converted into a servlet by the JSP engine. Once this servlet is dynamically compiled and loaded into memory, it follows the servlet life cycle for request processing. Here, the jspInit() method is automatically invoked by the JSP engine upon loading the servlet, followed by the _jspService() method, which is responsible for request processing and replying to the client. Do note that the lifetime of this servlet is non-deterministic - it may be removed from memory at any time by the JSP engine for resource-related reasons. When this happens, the JSP engine automatically invokes the jspDestroy() method allowing the servlet to free any previously allocated resources.
Subsequent client requests to the JSP page do not result in a repeat of the translation phase as long as the servlet is cached in memory, and are directly handled by the servlet's service() method in a concurrent fashion (i.e. the service() method handles each client request within a seperate thread concurrently.)
I hope this will help you out.
Regards,
TirumalaRao.
Developer TechnicalSupport,
Sun Microsystems,India.

JSP compiler obfuscates generated servlet debug line numbers

          Here's something that's been baffling me for a couple of days now.
          When WebLogic parses a JSP into servlet Java source, and then compiles the Java
          source into a class, it seems to perform a further step to obfuscate debug line
          numbers in the _jspService method. This converts the debug line numbers from Java
          source code line numbers into JSP line numbers.
          At first sight, this may appear to be useful- it means that when an exception
          is thrown then it references a line number in the original JSP rather than one
          in the generated servlet. However, it actually makes life more difficult when
          you consider included JSPs.
          Suppose you have a file loginresult.jsp, which uses @include to include a header.jsp
          and footer.jsp, both of which contain dynamic content. When WebLogic converts
          line numbers, it ignores the JSP that the code came from, so this causes a many-to-one
          mapping of line numbers. When an error occurs, the exception will tell you the
          line number that it came from, but it won't tell you which JSP caused it. The
          many-to-one mapping ensures a loss of information- and no way of retrieving the
          real line numbers.
          This is an even bigger nuisance when trying to debug JSPs- the debugger hops around
          in the generated servlet file without giving any clue as to whereabouts it really
          is in the code.
          My question is: is there any way of switching off this post-processor behaviour?
          One obvious way would be to locate the WebLogic class that does this post-processing,
          stub it out and run WebLogic with this class higher up in the classpath. But that's
          a last resort.
          Secondly, would there be any other impact in turning off this behaviour? Do other
          parts of WebLogic rely on this?
          Thanks in advance,
          Kevin.


Actually, this option turns line-number table replacement on and off, for example,
          with jsp like this:
          test.jsp
          <%
          throw new Exception();
          %>
          and weblogic.xml:
          <!DOCTYPE weblogic-web-app PUBLIC "-//BEA
          Systems, Inc.//DTD Web Application 7.0//EN"
          "http://www.bea.com/servers/wls700/dtd/weblogic700-web-jar.dtd">
          <weblogic-web-app>
          <jsp-descriptor>
          <jsp-param>
          <param-name>debug</param-name>
          <param-value>true</param-value>
          </jsp-param>
          </jsp-descriptor>
          </weblogic-web-app>
          the stacktrace looks like this (note line number 2 - this is JSP line number):
          java.lang.Exception
          at jsp_servlet.__test._jspService(test.jsp:2)
          at weblogic.servlet.jsp.JspBase.service(JspBase.java:27)
          at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:945)
          at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:332)
          at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:376)
          at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:242)
          at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:5360)
          at weblogic.security.service.SecurityServiceManager.runAs(SecurityServiceManager.java:721)
          at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3043)
          at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2468)
          at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:152)
          at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:133)
          and with debug option turned off:
          <!DOCTYPE weblogic-web-app PUBLIC "-//BEA
          Systems, Inc.//DTD Web Application 7.0//EN"
          "http://www.bea.com/servers/wls700/dtd/weblogic700-web-jar.dtd">
          <weblogic-web-app>
          <jsp-descriptor>
          <jsp-param>
          <param-name>debug</param-name>
          <param-value>false</param-value>
          </jsp-param>
          </jsp-descriptor>
          </weblogic-web-app>
          exception stacktrace looks like this (note that line number now is from generated .java file):
          java.lang.Exception
          at jsp_servlet.__test._jspService(__test.java:87)
          at weblogic.servlet.jsp.JspBase.service(JspBase.java:27)
          at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:945)
          at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:332)
          at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:376)
          at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:242)
          at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:5360)
          at weblogic.security.service.SecurityServiceManager.runAs(SecurityServiceManager.java:721)
          at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3043)
          at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2468)
          at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:152)
          at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:133)
          Kevin Thomas <[email protected]> wrote:
          > But this isn't useful, as you don't know which JSP the line number is referring
          > to! (did it come from the main JSP, or one of the files that it included?)
          > Turning debug off is not an answer- because that will lose other useful information
          > that is useful to the debugger.
          > Kevin.
          > "Dimitri I. Rakitine" <[email protected]> wrote:
          >>Actually, this is useful when you want to debug .jsp's and not generated
          >>..java files. Did you try setting 'debug' jsp-param in the weblogic.xml
          >>to
          >>false? I think it turns class postprocessing on and off.
          >>
          >>Kevin Thomas <[email protected]> wrote:
          >>
          >>> Here's something that's been baffling me for a couple of days now.
          >>
          >>> When WebLogic parses a JSP into servlet Java source, and then compiles
          >>the Java
          >>> source into a class, it seems to perform a further step to obfuscate
          >>debug line
          >>> numbers in the _jspService method. This converts the debug line numbers
          >>from Java
          >>> source code line numbers into JSP line numbers.
          >>
          >>> At first sight, this may appear to be useful- it means that when an
          >>exception
          >>> is thrown then it references a line number in the original JSP rather
          >>than one
          >>> in the generated servlet. However, it actually makes life more difficult
          >>when
          >>> you consider included JSPs.
          >>
          >>> Suppose you have a file loginresult.jsp, which uses @include to include
          >>a header.jsp
          >>> and footer.jsp, both of which contain dynamic content. When WebLogic
          >>converts
          >>> line numbers, it ignores the JSP that the code came from, so this causes
          >>a many-to-one
          >>> mapping of line numbers. When an error occurs, the exception will tell
          >>you the
          >>> line number that it came from, but it won't tell you which JSP caused
          >>it. The
          >>> many-to-one mapping ensures a loss of information- and no way of retrieving
          >>the
          >>> real line numbers.
          >>
          >>> This is an even bigger nuisance when trying to debug JSPs- the debugger
          >>hops around
          >>> in the generated servlet file without giving any clue as to whereabouts
          >>it really
          >>> is in the code.
          >>
          >>> My question is: is there any way of switching off this post-processor
          >>behaviour?
          >>> One obvious way would be to locate the WebLogic class that does this
          >>post-processing,
          >>> stub it out and run WebLogic with this class higher up in the classpath.
          >>But that's
          >>> a last resort.
          >>
          >>> Secondly, would there be any other impact in turning off this behaviour?
          >>Do other
          >>> parts of WebLogic rely on this?
          >>
          >>> Thanks in advance,
          >>
          >>> Kevin.
          >>
          >>--
          >>Dimitri
          >>
          Dimitri

Why JSP not move to jhtml direction?

I have both knowledge of JSP and JHTML (from ATG). I like jhtml much more. The jhtml architecture is far superior than jsp. I just list following features:
* better component naming, using directory and properties, instead of jsp.
* excellent Form handling capabilities.
* support expression
* droplet is more powerful and simple than those customer tag.
JSP is not better than MS ASP, which has better infrastructure, such as ADO etc. I don't understand why so many developers are fan of JSP, even Servlet! After a while, I am tired of them.

I can't speak about jhtml, but I do disagree with you about the MS ASP comparison. There are lots of very important reasons why JSP is better, but I'll list a few:
1. JSP is compiled, ASP is interpreted.
This results in faster executing code and less bugs due to compile time checking.
2. JSP (Java) is strongly typed, ASP is typeless (Variants)
Typed variables are better with memory and much better with reducing bugs due to discovering incompatible data types. Consider the fact that a simple boolean as a Variant in ASP takes up 16 bytes (last I looked at the actual C struct used under the covers).
3. JSP is platform independent, ASP only runs on Windows. Also, the are many different JSP containers to choose from, ASP only provides one.
The competition between Weblogic, Websphere, etc. greatly improves the JSP market since the strongest survive over time. Consider the fact that MS only threw out ASP for ASP.Net because J2EE is affecting their market share.
4. The scalability of ASP is severely restricted by the thread affinity of single-threaded apartments (STA) that IIS sets up to run non-MTS COM components. For example, you are committing scalability suicide if you keep any references to STA components in session or application state. And VB6 can only create STA components. You need VC++ to create MTS components.
5. JSP has the ability for standard and custom tag libraries, ASP has no capability.
Tag libraries are proving to be very valuable in the JSP space. A moderate use of well written tag libraries can severely increase developer productivity as well as reduce costs by shifting some page development from expensive Java developers to web designers.
6. ASP requires IIS, which has major security holes in the software. Attest to the fact that the Code Red virus alone cost over $4 Billion in wasted productivity alone.
Do not shrug off the above differences. They are major. They are the reason that developers have moved to the JSP world. If you're still not convinced, analyze why MS threw away ASP and produced ASP.Net. Despite what you read, ASP.Net is NOT simply the next version of ASP. They are architecturally two entirely different beasts. The proof of this is the fact that an ASP and ASP.Net page cannot co-exist in the same ASP application. That is, they do not share session or application state or cannot make calls into functions defined within each other. There's a reason for this.
Except for item 3 and 6, ASP.Net solves all of the above problems. In fact, if you compare .Net to J2EE, it's frightening how MS did not violate some sort of an architectural copyright, if one exists. .Net is effectively a clone of J2EE.
.Net is a good platform and will do well since MS is very committed to it. If you're a MS shop, you will be in good hands for new development. Besides being a proprietary platform, the only other problem is the massive amount of capital that will be required to migrate the millions of lines of VB, VC++, and ASP code to .Net. All the migration wizards in the world can never solve this!
Good luck.

Mail attachement converted into payload in xi

Hi all,
does anybody have a clue, why sometimes I receive mail attachement sent from MailServer to XI as Attachement (thats correct) and sometimes (2% of all messages) the attachement from Mailserver is converted into payload of xml message in XI.
If you have some suggestions how to solve the problem or What could cause the problem, please share you opinions.
Thanx

It depends whether the mail itself has several parts or it has just one part.
Check on the mail server the content type. When it is multi-part, then you get an attachment, when it is anything else, for example text/plain, then you have no attachment.
Regards
Stefan

Why jsp is converted into servlet?

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