Changing tomcat to read jsp from database

Is there any way to change tomcat 5.5 to read the JSPs from a database instead of local disk. I have been reading the tomcat javadoc for some time but was unable to find the right classes to customize for this task.
Can you please give us a help on which are the sections that we should look into to create this feature?
THANKS!

It doesn't make sense to read a database directly from an applet. If an applet needs data from a database is should request if from the server which the applet is located on and the server should do the actual database actions.
The whole point of applets is that they require no installation on the client machine. If you have to change policy files or the like, you might as well install a Swing application. Furthermore accessing a database tends to depend on how the client is set up on the network. Any sensible network has firewall settings that block access to the database ports to any external access (and, again, if you are limiting the facility to a few internal machines then why not just install a program on them).

Similar Messages

Urgent help with simple BPEL process for reading data from database

Hello there,
I need help with BPEL project.
i have created a table Employee in Database.
I did create application, BPEL project and connection to the database properly using Database Adapter.
I need to read the records from the database and convert into xml fomat and it should to go approval for BPM worklist.
Can someone please describe me step by step what i need to do.
Thx,
Dps

I have created a table in Database with data like Empno,name,salary,comments.
I created Database Connection in jsp page and connecting to BPEL process.
It initiates the process and it goes automatically for approval.
Please refer the code once which i created.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<%@page import="java.util.Map" %>
<%@page import="com.oracle.bpel.client.Locator" %>
<%@page import="com.oracle.bpel.client.NormalizedMessage" %>
<%@page import="com.oracle.bpel.client.delivery.IDeliveryService" %>
<%@page import="javax.naming.Context" %>
<%@page import="java.util.Hashtable" %>
<%@page import="java.util.HashMap" %>
<%@ page import="java.sql.*"%>
<%@ page import= "jspprj.DBCon"%>
<html>
<head>
<title>Invoke CreditRatingService</title>
</head>
<body>
<%
DBCon dbcon=new DBCon();
Connection conn=dbcon.createConnection();
Statement st=null;
PreparedStatement pstmt=null;
Hashtable env= new Hashtable();
ResultSet rs = null;
Map payload =null;
try
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.evermind.server.rmi.RMIInitialContextFactory");
env.put(Context.PROVIDER_URL, "opmn:ormi://localhost:port:home/orabpel");//bpel server
env.put("java.naming.security.principal", "username");
env.put("java.naming.security.credentials", "password");//bpel console
Locator locator = new Locator("default","password",env);
IDeliveryService deliveryService =
(IDeliveryService)locator.lookupService(IDeliveryService.SERVICE_NAME );
// construct the normalized message and send to Oracle BPEL Process Manager
NormalizedMessage nm = new NormalizedMessage();
java.util.HashMap map = new HashMap();
st=conn.createStatement();
out.println("connected");
String query1="Select * from EMPLOYEE";
rs=st.executeQuery(query1);
/*reading Data From Database and converting into XML format
so that no need of going to BPEL console and entering the details.
while (rs.next()){
String xml1 = "<AsynchBPELProcess1ProcessRequest xmlns='http://xmlns.oracle.com/AsynchBPELProcess1'>"+
"<Empno>"+rs.getString(1)+"</Empno>"+
"<EmpName>"+rs.getString(2)+"</EmpName>"+
"<Salary>"+rs.getString(3)+"</Salary>"+
"<Comments>"+rs.getString(4)+"</Comments>"+
"</AsynchBPELProcess1ProcessRequest>";
out.println(xml1);
nm.addPart("payload", xml1 );
// EmployeeApprovalProcess is the BPEL process in which human task is implemented
deliveryService.post("EmployeeApprovalProcess", "initiate", nm);
// payload = res.getPayload();
out.println( "BPELProcess CreditRatingService executed!<br>" );
// out.println( "Credit Rating is " + payload.get("payload") );
//Incase there is an exception while invoking the first server invoke the second server i.e lsgpas13.
catch(Exception ee) {
//("BPEL Server lsgpas14 invoking error.\n"+ee.toString());
%>
</body>
</html>
Its working fine.And i want it for Bulk approvals.please help me step by step procedure if any other way to implement this.

I am facing a Problem with reading images from database

Hi everybody..
any help will be most appreciated, I am facing problem with reading images from database. I am pasting my code...
string connect = "datasource = localhost; port = 3306; username = root; password = ;";
MySqlConnection conn = new MySqlConnection(connect); // creating connecting string
MySqlCommand sda = new MySqlCommand(@"select * from management.add_products ", conn); //creating query
MySqlDataReader reader;
try
conn.Open(); // Opening Connection
reader = sda.ExecuteReader(); // Executing my Query..
while (reader.Read())
byte[] imgg = (byte[])(reader["Picture"]);
if (imgg == null)
pc1.Image = null;
else
MemoryStream mstream = new MemoryStream(imgg);
pc1.Image = System.Drawing.Image.FromStream(mstream);
It says Parameter not Valid... i am reading all the images from database

I agree with Viorel. You are getting the error because the format of the data is incorrect probably because the data was modify. It may not be the reading of the database the is incorrect, but the application that wrote the data into the database. You need
to compare the imgg array data with the data before it was written to the database to see if the data matches. I usually start by comparing the number of bytes which is easier to check then compare the actual to isolate which function is changing the
byte count.
An image is binary data. The standard VS methods for reading and writing data (usually stream classes) default to ASCII encoding which will corrupt binary data. The solution usually is to use UTF8 encoding instead of the default ascii encoding.
Ascii encoding with stream often aligns the data and adds extra null bytes to the end of the data which can produce these type errors.
jdweng

How do I change the mail reading pane from horizontal to vertical ?

How do I change the mail reading pane from horizontal to vertical ? Help !!

Mail > Preferences > Viewing
Select or deselect: Use classic layout

Labview 2013 are closing when I try read table from database.

Labview 2013 are closing when I try read table from database.
I don't get error message, Labview just crashes. I'm use Labview x32 and Database Connectivity Toolkit connective on Windows 7 x64. I connect to PostgreSQL with ODBC driver, connection is stable.
In my database I have many tables, I can read all them without one.
When I try read bad table I get data and then labview crash. When I restart Labview I don't have any message about error.
Also I try use LabSQL-1.1a. But it has same result.
Solved!
Go to Solution.
Attachments:
DBT.png ‏104 KB
LabSQL.png ‏67 KB

Try connecting using UDL file. What operation you are doing with database
You can create the same.. Do this Tools --> Create Data link..
Then go to http://www.ni.com/pdf/manuals/371525a.pdf link and see page 3-5. It will help
Kudos are always welcome if you got solution to some extent.
I need my difficulties because they are necessary to enjoy my success.
--Ranjeet

Help required in writing And Reading Xml From Database

Hi
i m new to java.
i m facing problem while writing Xml file from Mysql Database in java i m using the WebRowSet
and also for Reading WebRowSet
after reading the Xml i have to save this in Database
(required source code)
is there any one to help me in this way
regards
aamir

shadab_think_globally wrote:
{noformat}*hi everybody,
please send me a ajax with jsp application
suppose i enter a word in text area ajax will populate/suggest all string from database ,who started
from that entering character(s).like a google string search.
please send full source code
*{noformat}how about you do it yourself?

How to read data from database to applet

hi i am writing a program below which reads data from mysql database successfully ;
import java.sql.*;
import java.lang.*;
import java.util.*;
public class Read_Capital_country_from_database {
public static void main (String args[] ){
int index,mess;
String country_arr[] = new String[250];
String capital_arr[] = new String[250];
int i = 0 ;
String URL = "jdbc:mysql://localhost/allusers";
String user = "shadab";
String password ="shadab@123";
try {
Class.forName("com.mysql.jdbc.Driver");
Connection conn = DriverManager.getConnection(URL,user,password);
for( SQLWarning warn = conn.getWarnings(); warn != null; warn = warn. getNextWarning() )
System.out.println( "SQL Warning:" ) ;
System.out.println( "State : " + warn.getSQLState() ) ;
System.out.println( "Message: " + warn.getMessage() ) ;
System.out.println( "Error : " + warn.getErrorCode() ) ;
String sql = "select * from country_capital";
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery(sql);
while( rs.next() ) {
System.out.println( rs.getString(1) );
System.out.println(" " +rs.getString(2) );
System.out.println();
catch (SQLException se){
System.out.println( "SQL Exception:" ) ;
System.out.println("Exception - raju");
while( se != null )
System.out.println( "State : " + se.getSQLState() ) ;
System.out.println( "Message: " + se.getMessage() ) ;
System.out.println( "Error : " + se.getErrorCode() ) ;
se = se.getNextException() ;
catch( Exception e )
System.out.println( e ) ;
java Read_Capital_country_from_database
OUT PUT OF ABOVE PROGRAM IS :
INDIA NEW DELHI
PAKISTAN ISLAMABAD
AFGHANISTAN KABUL
BUT SAME PROGRAM WHEN I GO TO WRITE IN APPLET
THIS TIME APPLET DOES OPEN BUT ERROR SHOWS ON STANDARD OUT PUT
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
THIS IS THE PROGRAM WRITTEN FOR JAVA APPLET
import java.sql.*;
import java.lang.*;
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
public class Read_Capital_country_from_database extends Applet {
Choice country, capital;
String msg=" ", msg1;
int index,mess;
String country_arr[] = new String[250];
String capital_arr[] = new String[250];
char chr;
int i = 0;
public void init() {
country = new Choice();
capital = new Choice();
String URL = "jdbc:mysql://localhost/allusers";
String user = "shadab";
String password ="shadab@123";
try {
Class.forName("com.mysql.jdbc.Driver");
Connection conn = DriverManager.getConnection(URL,user,password);
for( SQLWarning warn = conn.getWarnings(); warn != null; warn = warn. getNextWarning() )
System.out.println( "SQL Warning:" ) ;
System.out.println( "State : " + warn.getSQLState() ) ;
System.out.println( "Message: " + warn.getMessage() ) ;
System.out.println( "Error : " + warn.getErrorCode() ) ;
String sql = "select * from country_capital";
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery(sql);
while( rs.next() ) {
country_arr[i] = rs.getString(1);
country.add(country_arr);
capital_arr[i] = rs.getString(2);
capital.add(capital_arr[i]);
i++;
catch (SQLException se){
System.out.println( "SQL Exception:" ) ;
System.out.println("Exception - raju");
while( se != null )
System.out.println( "State : " + se.getSQLState() ) ;
System.out.println( "Message: " + se.getMessage() ) ;
System.out.println( "Error : " + se.getErrorCode() ) ;
se = se.getNextException() ;
catch( Exception e )
System.out.println( e ) ;
add(country);
add(capital);

It doesn't make sense to read a database directly from an applet. If an applet needs data from a database is should request if from the server which the applet is located on and the server should do the actual database actions.
The whole point of applets is that they require no installation on the client machine. If you have to change policy files or the like, you might as well install a Swing application. Furthermore accessing a database tends to depend on how the client is set up on the network. Any sensible network has firewall settings that block access to the database ports to any external access (and, again, if you are limiting the facility to a few internal machines then why not just install a program on them).

Can't read JSP from WAR file

          Hi, Everyone:
          The WAR really drives me crazy.
          everytime when i reach the jsp files in war, it throws exception:
          <I> <WebAppServletContext-skylos> Generated java file:
          C:\weblogic\myserver\_tmp_war\jsp_servlet\common\test.java
          <E> <WebAppServletContext-skylos> Servlet failed with Exception
          java.lang.NullPointerException
          at java.util.Hashtable.put(Hashtable.java:380)
          at weblogic.servlet.jsp.OneOffJspLoader.loadClass(JspStub.java:433)
          at java.lang.ClassLoader.loadClass(ClassLoader.java:253)
          i uses WLS5.1 SP6.
          my WAR is under /weblogic/myserver/ (i can load html from my war)
          thanks
          han


          i solved it.
          it is about relative path and absolute path.
          coz browser tries to search /common/checklogin.jsp
          from documentRoot.
          han
          "hansen" <[email protected]> wrote:
          >
          >i solved it.
          >
          >the reason is i didn't install SP6 correctly.
          >
          >but i got another question:
          >
          >everytime, i enter password and login name on login.jsp
          >page,and press "Login". it should call checkLogin.jsp. but
          >the browser asks me to "save it" or "open it".
          >
          >thanks
          >
          >han
          >
          >han
          >
          >
          >"hansen" <[email protected]> wrote:
          >>
          >>Hi, Everyone:
          >>
          >>The WAR really drives me crazy.
          >>
          >>everytime when i reach the jsp files in war, it throws exception:
          >>
          >><I> <WebAppServletContext-skylos> Generated java file:
          >>
          >> C:\weblogic\myserver\_tmp_war\jsp_servlet\common\test.java
          >>
          >><E> <WebAppServletContext-skylos> Servlet failed with Exception
          >>
          >>java.lang.NullPointerException
          >>
          >> at java.util.Hashtable.put(Hashtable.java:380)
          >>
          >> at weblogic.servlet.jsp.OneOffJspLoader.loadClass(JspStub.java:433)
          >>
          >> at java.lang.ClassLoader.loadClass(ClassLoader.java:253)
          >>
          >>i uses WLS5.1 SP6.
          >>
          >>my WAR is under /weblogic/myserver/ (i can load html from my war)
          >>
          >>thanks
          >>
          >>han
          >

Setting the Data into a DropDownListBox in index.jsp from DataBase

Hi,
I want to put some data in dropdownlist.
// in PageFlow Controller class
public String[] items = {"aaa","bbb","ccc"};
and in index.jsp
<netui:select optionsDataSource="{pageFlow.items}" dataSource="{actionForm.selections}">
I run the index.jsp and getting the dropdownlist with items aaa,bbb and ccc.
Now I place a method in begin() method
String[] items = conn.getData();//which returns data from database
but the begin() method is not executed when I run the index.jsp after that I put the code
String[] items = conn.getData(); in action() method
it is giving the dropdownlist but after submitting the form i.e after calling the action.
please tell me how the items will be set to listbox before action i.e when I run the index.jsp.Where can I put the code
String[] items = conn.getData();
and why the begin() method is not invoking.
Regards,
Sivaram

Hi,
I'm not sure if you have solved this yet?
The issue you are facing is that you are loading the JSP directly. When you do this the pageflow will not be called and so the begin function not called.
If you simply enter the URL of the pageflow instead of the JSP this will call the begin function, loading your dropdown values, and it should then redirect through an action to your index.jsp
Hope that this helps
Cheers
IV

Setting the Data into a DropDownList in index.jsp from Database

Hi,
I want to create a Dynamic dropdownlist.
// in PageFlow Controller class
public String[] items = {"aaa","bbb","ccc"};
and in index.jsp
<netui:select optionsDataSource="{pageFlow.items}" dataSource="{actionForm.selections}">
I run the index.jsp and getting the dropdownlist with items aaa,bbb and ccc.
Now I place a method in begin() method
String[] items = conn.getData();//which returns data from database
but the begin() method is not executed when I run the index.jsp after that I put the code
String[] items = conn.getData(); in action() method
it is giving the dropdownlist but after submitting the form i.e after calling the action.
please tell me how the items will be set to listbox before action i.e when I run the index.jsp.Where can I put the code
String[] items = conn.getData();
and why the begin() method is not invoking.
Regards,
Sivaram

Hi,
I'm not sure if you have solved this yet?
The issue you are facing is that you are loading the JSP directly. When you do this the pageflow will not be called and so the begin function not called.
If you simply enter the URL of the pageflow instead of the JSP this will call the begin function, loading your dropdown values, and it should then redirect through an action to your index.jsp
Hope that this helps
Cheers
IV

Write n then read xml from database to create graph in an applet

Hi mates
I have one problem I want show a trend(graph) from sql database which is having the records of about 8600 in a day. And i want to show a graph for a day
but sometimes it gives a problem like out-of-memory, so can anyone tell me how i can get read of it.
and other this can i use xml for this means first write a data in xml format from database then read it at sametime and show graph in applet
can anytell me how to do it
any suggesion is appreciable
thanx

Here's are two example for what you are looking for
Re: Load xml data in Oracle table
Re: insert .xml file into xmltype table?
First you need to create a DIRECTORY object. That is how Oracle works and it expects a DIRECTORY object instead of a physical path when performing operations that read/write from disk. The directory path provided to the CREATE DIRECTORY command must be a directory that the machine Oracle DB resides on can see.
Then you can go either of two routes. You can INSERT that XML directly into a table, as shown in the second link I provided or you can read it into PL/SQL as the first link shows. Then in either case, you can use SQL to parse the XML for you.
Depending upon your needs, you may get better performance if you insert the XML into a table as the second link shows, assuming the XMLType column is stored as SECUREFILE BINARY XML.

Image on jsp from database along with other elements on image.

Hi All,
I wish to display an image which is stored in my database along with other contents on the page.
I am able to display the image on an entirely new page but I do not wish to display it on a new page. Neither frames etc fit on my current page design.
Kindly help

I have a jsp page ..
I have a byte stream in which i have stored the image from the database (the image is stored in databse as blob) in that jsp.When i use output stream object to display the image from the database (as suggested by many in this forum), the image is displayed in a new page. I wish to display the image along with my other elements like text etc in the same page.

Generate jsp from database table

Does anyone know of a utility that will take a database table as input and generate a generic maintenance app (jsp) that will allow add/change/delete functionality to the table?
I tried a utility called JSPMaker, however the code generated is horrid and I'm afraid it will not be maintainable.
I also loaded Workshop Studio and was hoping that the dbXplorer had that functionality, but have not been successful.
Thanks in advance!
Rob

I think the answer for the first question is JSTL. :)

Need help in reading data from Database.

Hi experts,
I have created a custom smartforms and custom print program. In my print program i have read all the data and populated the internal table and i am able to display the data in the smartform output.
I'm using Tcode me23n to print preview the form. i have to read the "text" tab from the me23n tcode using FM "READ_TEXT". The data is getting populated into an internal table. I coded these statements in Initialization tab in global definition.
Now my problem is ..... Can anyone tell me how to display the data into the forms.
please help.
Thanks

Follow below example to using FM 'READ_TEXT'
DATA BEGIN OF i_tlines OCCURS 0.
        INCLUDE STRUCTURE tline.
DATA END   OF i_tlines.
DATA: w_textname(70) TYPE c.
w_textname = vbdkr-vbeln.
CALL FUNCTION 'READ_TEXT'
    EXPORTING
      client                        = sy-mandt
      id                            = 'Z006'
      language                      = 'E'
      name                          = w_textname
      object                        = 'VBBK'
    TABLES
      lines                         = i_tlines.
IF sy-subrc = 0.
    READ TABLE i_tlines INDEX 1.
    t_in-m1 = i_tlines-tdline.   "Now t_in_m1 will have the value
ENDIF.
Regards,
SaiRam

Change display text in discoverer from database view

Hello,
I just wondered if it possible to do the following:
Create a discoverer report using e.g. person type field. In the database view the value required for this would be "Full-time" however when the user sees the value in the discoverer report the value is displayed as Employee type 1?
Can you change the text of a value a user sees in discoverer form what it is pulled out of the view as?
Please advise
Thank you
Sarah

Hi Sarah
Yes you can do this. It is done as a calculation like this:
CASE
WHEN Person_Type = 'Full-time' THEN 'Employee type 1'
WHEN Person_Type = 'Part-time' THEN 'Employee type 2'
ELSE Person_type
END
You would call this calculation Employee Type and display it it in the report instead of Person Type.
Best wishes
Michael

Changing tomcat to read jsp from database

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