Gerome Kawa

Hi Ben
Can you please tell me some URLs where I can find som sample code/workign application for such a mechanism. I am not that great in coding so need some help to start writing it and then I can take it from there.
Thanks
Kawa

Actually it is an existing application and I cannot change the existing mechanism. What I need is to some way display display some user friendly message which refreshes intermittently about the processing which is happening at the backend. The backend processing happens in three stages and I want to display the user different messages as each stage starts.
Please let me know if you have any idea.

Thanks
Kawa

Hi
I have a JSP page with a button which when clicked does enormous processing at the back-end and takes around 10 minutes to complete. I want to provide the users some status update messages of what happening in the JSP.
Can anyone point to some sample application/design/code samples ideas of how to go ahead ?

Thanks
Kawa

Try using Jasper. I have seen it briefly and I think it has the potential to to give you SQL-report like output

Hi
I am Java/J2ee/Oracle analyst-developer with 9 years IT experience and Java/J2ee/Oracle about 5 years.
I am a British citizen have been working in the UK for the last 7 years.
My contract has just finished and am looking for J2ee analyst/module lead role in London.
I would be extremely glad if you let me know of any opprtunites.

Thanks
Kawa
ph:07941313108

Hi

I need to use a properties file to replace variables in a Java program and a servlet.

Eg. of Java program:
****************************************************
public class SendResponseThread implements Runnable { Thread responseThread; String dirName; File destFolder; boolean dirCreated = false; private final static SimpleDateFormat dateFormatForFileName = new SimpleDateFormat("yyyyMMdd-HHmmss-SSS"); Date now = new Date(); SendResponseThread() { /* dirName = "c:\\Transmission"; destFolder = new File("c:\\TransmissionResponded"); */ dirName = "@TRANSMISSION_RCVD_FOLDER@"; destFolder = new File("@TRANSMISSION_RESPONDED_FOLDER@"); dirCreated = destFolder.mkdir(); if(dirCreated) { System.out.println( destFolder + " created !"); }else { System.out.println( "FATAL : " + destFolder + " did not create !"); } responseThread = new Thread(this, "SendResponseThread"); responseThread.start(); } public void run() { File srcFolderFile = new File(dirName); String destFolderName = destFolder.getName(); File destFolderFile = new File("c:\\" + destFolderName); //while(responseThread == Thread.currentThread()) while(true) { if(srcFolderFile.isDirectory()) { File srcFiles[] = srcFolderFile.listFiles(); if(srcFiles.length > 0){ for(int i=0; i < srcFiles.length; i++) { System.out.println("f.getName() :" + srcFiles[i].getName()); // Move file to new directory try{ now = new Date(); //boolean success = srcFiles[i].renameTo(new File(destFolderFile+"\\"+srcFiles[i].getName())); boolean success = srcFiles[i].renameTo(new File(destFolderFile+"\\"+srcFiles[i].getName() + dateFormatForFileName.format(now))); if (!success) { System.out.println(srcFiles[i].getName() + " file was not successfully moved !"); } }catch(Exception e){ e.printStackTrace(); } } } try { Thread.sleep((new Long("@intervalTime@")).longValue()); } catch(InterruptedException ie) { System.out.println("SendResponseThread interrupted." + ie.getMessage()); } catch(Throwable a) { a.printStackTrace(System.out); } } } } // end run method } // end class
****************************************************
The servlet:
package servlets; import java.io.*; import javax.servlet.*; import javax.servlet.http.*; import org.jdom.Document; import org.jdom.JDOMException; import org.jdom.input.SAXBuilder; import utils.AppConstants; public class AcceptAndSaveTransmittedFile extends HttpServlet { static int fileCounter = 0; File parentDir; public void init() throws ServletException { fileCounter = 0; //parentDir = new File("c:\\Transmission"); parentDir = new File("@TRANSMISSION_RCVD_FOLDER@"); parentDir.mkdir(); // Invoke thread SendResponseThread p = new SendResponseThread(); } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { handleRequest(request, response); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { handleRequest(request, response); } public void handleRequest(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException { PrintWriter pw = response.getWriter(); // get the message body from the request object String xml = request.getParameter("xml"); System.out.println("Got this XML From client : \n" + xml); Document docXML = null; try { docXML = getDocumentFromString(xml); response.setStatus(HttpServletResponse.SC_OK); } catch (JDOMException e) { System.out.println("Caught JDOM Exception" + e.getMessage()); response.sendError(HttpServletResponse.SC_BAD_REQUEST, "XML Was not posted or was malformed"); return; } pw.println("<html><head></head><body><h3>Saved XML file </h3></body></html>"); // Copy the jdom document and save it in folder String fileName = "FileName" + fileCounter + ".xml"; File fileReceived = new File(parentDir,fileName); FileOutputStream foup = new FileOutputStream(fileReceived); byte buf[] = xml.getBytes(); for(int i=0;i<buf.length;i++) { foup.write(buf[i]); } foup.flush(); foup.close(); fileCounter++; } private Document getDocumentFromString(String input) throws JDOMException, IOException { if (input == null || input.trim().length() == 0) { throw new JDOMException("The posted string is empty"); } SAXBuilder builder = new SAXBuilder(false); // TODO to be removed later on so that it validates against dtds or schemas builder.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false); Document doc = builder.build(new StringReader(input)); return doc; } }
********************************************************************
I want to put the stuff between @xyz@ in the above programs in a properties file and access them - how do i do it?

I want to stuff @xyz@ in the servlet to come from a init-param of the servlet defined in web.xml .

Question:
Where should I put the properties file ?
How do i access it(the variavles in the properties file) from java program?
Do i need to put the properties file in the classpath?

Thanks
Kawa

[EDIT code tags added by Dave]
[ February 10, 2005: Message edited by: David O'Meara ]

Hi Jacquie
Its really good that you have come up with such a book.
I am software developer for 8 years now and I constantly keep on searching the net about shifting gracefully to a new role where I can make use of my already gained IT skills and gain extra business knowledge through which I can reap even better in the future. I believe that the key thing is to get yourself in the iteration of newRole-increasedSalary-gainExtraITAndBusinessSkill-newRole. The key hindrance I am facing is getting a new role where I can gain reusable business knowledge. For example I have worked predominantly as a analyst-developer using different programming languages in different industry sector (Oracle Forms/Reports(Hotel Sector 1yr), AS400(Manufacturing 1 yr), COBOL-DB2(Utility Sector 1yr), Java-J2EE(5 yrs in majorly web-development roles) and I am finding it immensely difficult now to get a stable career. My intention is to get into the Financial Sector where I think there is scope to gain tranferrable business knowledge coupled with increased pay.
I would appreciate if you can give me some advice how I can make this transition at my age of 32.

Thanks
Gerome

Anna
The ant.properties file is in the same folder as build.xml so what do i put in the dir attribute ?

Thanks
Kawa

I am having some problems as follows:

When am trying to execute the command
c:\hubtransmission>build all

am getting the following error

C:\hubtransmission>build all
-------------Hubtransmission 1.0 Build System-------------
Using Ant at c:\hubtransmission\buildtools\ant1.6.1

Buildfile: build.xml

init:

replace-tokens:

BUILD FAILED
C:\hubtransmission\build.xml:38: Either the file or the dir attribute must be specified


It seems the ant.properties cannot be identitfied but I cannot make out why ?
Anyone spot the mistake ?
**************************************************************
folder structure
**************************************************************
hubtransmission
--build(build.xml, ant.properties, build.bat)
----deploymentdescriptors
----ear
----src
----war
--buildtools
----ant1.6.1
--lib
--src
----descriptors
----java
----web
**************************************************************
build.xml
**************************************************************
<project name="Hubtransmission Emulator" default="all" basedir=".">

<target name="init">

<!--
<property file="ant.properties"/>
-->
<property name="fs" value="${file.separator}"/>
<property environment="env"/>

<property name="dirs.base" value="${basedir}"/>
<property name="classdir" value="${dirs.base}/build/src"/>
<property name="src" value="${dirs.base}/src"/>
<property name="web" value="${dirs.base}/web"/>
<property name="deploymentdescription" value="${dirs.base}/build/deploymentdescriptors"/>

<property name="ant.properties" value="ant.properties" />

<property name="warFile" value="hubtransmission.war"/>
<property name="earFile" value="hubtransmission.ear"/>


<property name="earDir" value="${dirs.base}/build/ear"/>
<property name="warDir" value="${dirs.base}/build/war"/>


<!-- Create Web-inf and classes directories -->
<mkdir dir="${warDir}/WEB-INF"/>
<mkdir dir="${warDir}/WEB-INF/classes"/>

<!-- Create Meta-inf and classes directories -->
<mkdir dir="${earDir}/META-INF"/>

</target>

<!-- Replace tokens-->
<target name="replace-tokens">
<replace replacefilterfile="ant.properties"/>
</target>

<!-- Main target -->
<target name="all" depends="init,replace-tokens,build,buildWar,buildEar"/>


<!-- Compile Java Files and store in /build/src directory -->
<target name="build" >
<javac srcdir="${src}" destdir="${classdir}" debug="true" includes="**/*.java" />
</target>

<!-- Create the War File -->
<target name="buildWar" depends="init">

<copy todir="${warDir}/WEB-INF/classes">
<fileset dir="${classdir}" includes="**/*.class" />
</copy>

<copy todir="${warDir}/WEB-INF">
<fileset dir="${deploymentdescription}" includes="web.xml" />
</copy>

<copy todir="${warDir}">
<fileset dir="${web}" includes="**/*.*" />
</copy>

<!-- Create war file and place in ear directory -->
<jar jarfile="${earDir}/${warFile}" basedir="${warDir}" />

</target>


<!-- Create the War File -->
<target name="buildEar" depends="init">
<copy todir="${earDir}/META-INF">
<fileset dir="${deploymentdescription}" includes="application.xml" />
</copy>

<!-- Create ear file and place in ear directory -->
<jar jarfile="${dirs.base}/${earFile}" basedir="${earDir}" />
</target>
</project>

**************************************************************

Hi
Am new to ANT and it is my first time writing a build file.
My folder structure:

xyztransmission
-- buildscripts(ant.properties,build.xml)
-- lib(jdom.jar)
-- src
-----java
-------servlets(*.java)
-------utils(*constants.java)
-----web(welcome.html)
-------WEB-INF(web.xml)

I want to create a war file and deploy it into tomcat
(i.e.create a folder named hubtransmission under webapps)


Can anyone help me with the build.xml

Thanks
Kawa

Hi I have some questions which are still not very clear to me !

1. What is the manifest file ?
2. Why do we need the manifest file?
3. Is it mandatory to have it ?
4. When does it get created ( i mean we certainly don't write it in a text editor, it must be getting generated automatically)
5. What is the use of META-INF folder ?
6. Do we have to create explicitly for a web application and is it mandatory?

Thanks
Kawa

What does the following ** mean ?

<include name="apps/**/classes"/>

Thanks
kawa

Thanks anna !

Hi
I have to create a folder (named XYZ) in a servlet but i need to pass on the name when I build the web app . I want to give the folder-name in a properties file, and replace the folder-name in the servlet when am building the app through build.xml

Question:
What to do in build.xml ?
What to do in the servlet ?
How to access the properties file from the build.xml?

Any help will be deeply appreciated.

Thanks
Kawa

I have the following structure for my web application:

C:\jakarta-tomcat-4.1.30
- webapps
- xyztransmission ( xml_input.html)
- servlets
- WEB-INF (web.xml)
- classes
- servlets (AcceptAndSaveTransmittedFile.class)

*******************************************************************
The xml_input.html file:

<HTML>
<HEAD>
<TITLE>XML Input to Transmission Emulator</TITLE>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
<style type="text/css">
body, td, select, input, textarea {
font-family: Verdana, Arial, Helvetica, sans-serif;
font-size: 8pt;
color: #001E4C;
}
h3 {
background-color : #E5EFF2
}
.normformbutton {
BORDER-RIGHT: #000 thin solid;
BORDER-TOP: thin outset #9999CC;
FONT-SIZE: 8pt;
BORDER-LEFT: thin outset #9999CC;
COLOR: white;
BORDER-BOTTOM: #000 thin solid;
FONT-FAMILY: Verdana, Arial, Helvetica, sans-serif;
HEIGHT: 22px;
width: 82px;
BACKGROUND-COLOR: #001E4C;
}
</style>
</HEAD>
<BODY BGCOLOR=#FFFFFF>
<form action="/processrequest" method="POST">
<table width="100%" cellspacing="0" cellpadding="3">
<tr>
<td> </td>
<td>Please paste your XML in the box below and press submit</td>
<td> </td>
</tr>
<tr>
<td> </td>
<td><textarea name="xml" cols="120" rows="20"></textarea></td>
<td> </td>
</tr>
<tr>
<td> </td>
<td>
<table>
<tr>
<td>Send XML To HUB</td>
<td><input type="submit" value="submit" class="normformbutton"></td>
</tr>
</table>
</td>
<td> </td>
</tr>
</table>

</BODY>
</HTML>
*******************************************************************
My web.xml is as follows:
<?xml version="1.0"?>
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
<display-name>XYZ Emulator Servlet</display-name>
<description>Receives xml files and saves them in file system</description>
<servlet>
<servlet-name>AcceptAndSaveTransmittedFile</servlet-name>
<servlet-class>servlets.AcceptAndSaveTransmittedFile</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>AcceptAndSaveTransmittedFile</servlet-name>
<url-pattern>/processrequest</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>xml_input.html</welcome-file>
</welcome-file-list>
</web-app>
****************************************************************

After starting up tomcat and putting the URL
http://localhost:8080/hubtransmission/xml_input.html
I get to see my html file correctly
But when I press the submit button, expecting the servlet 'AcceptAndSaveTransmittedFile 'to be called I get HTTP 404 error saying " The requested resource (/processrequest) is not available."


Can anyone tell me where I am going wrong ?


Thanks