If I redirect url will database connection close ?

Can someone tell me how this would work ?
If I connect to the database and if the username and password is correct I redirect the user to a website using :
response.sendRedirect(response.encodeRedirectUrl("http:....");
and then I close the connections...
rs.close();
stmt.close();
connection.close();
Then if the user is valid will my connection close ? If not how do I close the connection ??

Right now I have it this way:
if (rs.next()) {
response.sendRedirect(response.encodeRedirectUrl("http.........."));
else
something else and close connections
}

Similar Messages

How will my connection to databse close?

Can someone tell me how this would work ?
If I connect to the database and if the username and password is correct I redirect the user to a website using :
response.sendRedirect(response.encodeRedirectUrl("http:....");
Right now I have it this way:
if (rs.next()) {
response.sendRedirect(response.encodeRedirectUrl("http.........."));
and then I close the connections...
rs.close();
stmt.close();
connection.close();
Then if the user is valid will my connection close ? If not how do I close the connection ??

Can someone tell me how this would work ?
If I connect to the database and if the username and
password is correct I redirect the user to a website
using :
response.sendRedirect(response.encodeRedirectUrl("http:
Right now I have it this way:
if (rs.next()) {
response.sendRedirect(response.encodeRedirectUrl("http.
and then I close the connections...
rs.close();
stmt.close();
connection.close();
Then if the user is valid will my connection close ?
If not how do I close the connection ??
close the connection before redirecting the page.
if (rs.next()) {//after validation close the connection here
rs.close();
stmt.close();
connection.close();
response.sendRedirect(response.encodeRedirectUrl("http........."));

Properly close database connection - Oracle

I have an unusuall application that has a main in it and runs off of a cron job.
We have orders that have to be filled, and if the approver of that order does not reject it after 30 minutes its automatically filled.
The weird thing is that alot of these stored procedures were already in place before I got there so I just went ahead and called them to get the data that I needed.
So, we have a shell script that just calls my class. The main kicks off and gets the time of the orders placed on that day. If the current time minus the time the order was placed is greater than 30 minutes approve the order.
Now, I have about 3 - stored procedures that I call in one method. Actually I have about 3 or 4 methods that in turns calls these stored procedures. I have callable statements for each method. and I do a try - catch in each of the other methods, but not a connection close. In the one method that does all the work and calls the other methods, I have a try - catch - and a then a finally. I then do a conn.close() in the finally of this method.
My question is? Is this correct. Should I do a try catch finally in my main() method.
So, this is sort of what it looks like.
class DoSomething
   Connection conn;
   method1()
      try
         CallableStatement cs;
         ResultSet rs;
         rs.close;
         cs.close;
      catch
      return something1;
   method2()
      try
         CallableStatement cs;
         ResultSet rs;
         rs.close;
         cs.close;
      catch
      return Something2;
   method3()
      try
         CallableStatement cs;
         ResultSet rs;
         rs.close;
         cs.close;
      catch
      return Something3;
   doSomethingMethod()
      try
         CallableStatement cs;
         ResultSet rs;
        // call the other methods to get all data needed.
        ds.method1;
        ds.method2;
        ds.method3;
         rs.close;
         cs.close;
      catch
      finally
          conn.close();
   main()
      DoSomething ds = new DoSomething();
      ds.doSomethingMethod();
}orozcom

Well, The catch blocks are not empty. I assure you. I
just didn't feel like writing down all of my code.
plus I did not want to cloud the example with to much
code. Very good.
All I wanted to know is when and where to close
my resultset, callable statements, and connection.OK, you should close each one in its own individual try/catch block in a finally block inside the method in which they were called.
If the stored procs are a unit of work, you'll have to share the Connection.
Please also realize that this is a web based
application as well. I take in parameters from a URL.
I pass those parameters to the stored procs (which
are already there). If you're doing that in a JSP, I'd say you've got a bad design.
Now sometimes one method needs
information from another method. So, I run that
method. pass the info to another method or stored
proc which gives me my info. All this should be happening in a service layer.
I was told that a finally block always runs. So, I
thought if I atleast put my conn.close in the
finally. then it will always close the connection.As long as it doesn't throw an exception. And you should close ResultSets and Statements, regardless of what the javadocs say.
Also, there is only one database that I call. Now the
stored procs are all on the same database, but they
are in different packages. which is why I use the
callable statements.That's fine.
Also, I do not only call stored procs. I usually only
call a stored proc to get information back, and then
give it to a class to manipulate the data.Sounds inefficient. Would a JOIN do as well? You might fall into the (n+1) query trap, where you run a query to get a ResultSet and then iterate through it and run another query per iteration. This is inefficient as n gets large.
%

Opening multiple reports in Crystal Reports for VS causes database connect limit to be reached. Seems to be no way to force Crystal Reports to close database connection (other than exiting application)

I am working on upgrading an application that has been in use for many years. The application is written in VB6 and I have been tasked with upgrading the current application to Crystal Reports for Visual Studio. I am using Crystal Reports for VS Version 13.0.12.1494. The system's database is a Sybase SQL Anywhere 16 database with an ODBC connection using integrated login. Each of the reports has the database connection set up from within the report. There is only once database server, so each of the reports are pointing to the same DB. The database server is currently installed as a "Personal Server" with a limit of 10 connections.
I have implemented the CR viewer as part of a COM-callable wrapper that exposes a COM interface for VB6 to interact with. Inside of my viewer component is a Winform that embeds the Crystal's Report viewer. The COM interface basically maps the basic Crystal apis to methods that the VB6 can call (i.e., Load Report, Set Field Text, Update SQL Query, etc). This architecture is working as designed and the reports are displaying correctly and responding correctly to changes in queries, etc.
The issue is that after I open 9 reports, the tenth one will respond with an error indicating that the database connection limit has been reached. The database connections used by the reports aren't released until after the application is closed. The application is designed for a secure environment that prohibits the non-administrative user from accessing the systems desktop, so asking the user tor restart the application after 10 reports isn't a viable option.
I have checked and database connection pooling is turned off for the SQL Anywhere 16 driver.
I have been digging on this for a few days and have tried adding code in the FormClosed event to close and dispose of the Report Document as follows:
ReportDocument reportDoc= (ReportDocument) crystalReportViewer1.ReportSource;
reportDoc.Close();
reportDoc.Dispose();
GC.Collect();       // Force garbage collection on disposed items
I have also tried the following (as well as maybe 20 or so other permutations) trying to fix the issue with no success.
ReportDocument reportDoc= (ReportDocument) crystalReportViewer1.ReportSource;
foreach (Table table in reportDoc.Database.Tables)
     table.Dispose();
crystalReportViewer1.ReportSource = null;
reportDoc.Database.Dispose();
reportDoc.Close();
reportDoc.Dispose();
reportDoc = (ReportDocument)crystalReportViewer1.ReportSource;
GC.Collect();       // Force garabe collection on disposed items
Any ideas or suggestions would be greatly appreciated. I have been pulling my hair out on this one!

Hi Ludek,
Thanks so much for the quick reply. Unfortunately I did not have time to work on the reporting project Friday afternoon, but did a quick test this morning with some interesting results. I'm hoping if I describe what I'm doing, you can show me the error of my ways. This is really my first major undertaking with Crystal Reports.
If I simply load the report, then close and dispose, I don't hit the limit of 10 files. Note that I do not logon manually in my code as the logon parameters are all defined within the reports themselves. The logon happens when you actually view the report. Loading the report doesn't seem to actually log in to the DB.
What I did was create a very simple form with a single button that creates the WinForm class which contains the Crystal Viewer. It then loads the report, sets the ReportSource property on the CrystalReportsViewer object contained in the WInForm and shows the report. The report does show correctly, until the 10 reports limit is reached.
The relevant code is shown below. More than I wanted to post, but i want to be as complete and unambiguous as possible.
This code displays the same behavior as my earlier post (after 10 reports we are unable to create another connection to the DB).
// Initial Form that simply has a button
public partial class SlectReport : form
        public SelectReport()
            InitializeComponent();
        private void button1_Click(object sender, EventArgs e)
            ReportDocument rd = new ReportDocument();
            ReportForm report = new ReportForm();
            try
                rd.Load(@"Test.rpt");
                report.ReportSource = rd;
                report.Show();
         catch (Exception ex)
              MessageBox.Show(ex.Message);
// The WinForm containing the Crystal Reports Viewer
    public partial class ReportForm : Form
        public ReportForm()
            InitializeComponent();
        private void Form1_Load(object sender, EventArgs e)
            this.crystalReportViewer1.RefreshReport();
            this.FormClosed += new FormClosedEventHandler(ReportForm_FormClosed);
        void ReportForm_FormClosed(object sender, FormClosedEventArgs e)
            ReportDocument rd;
            rd = (ReportDocument)crystalReportViewer1.ReportSource;
            rd.Close();
            rd.Dispose();
        public object ReportSource
            set { crystalReportViewer1.ReportSource = value; }
Again, any guidance would be greatly appreciated.

How I can close Database connection?

I am using the following to open Database connections in Java class.
Class.forName("oracle.jdbc.driver.OracleDriver");
con = DriverManager.getConnection("URL","user","password");
But I do not know how I can have it closed.
This cause an SQL error: Maximum open cursors exceeded.

Thanks so much. Your explanation is so clear.
Here is the whole code. Thanks for your help.
package xxx.xx.xxx;
import java.io.*;
import java.sql.*;
import java.util.*;
public class Format_BaseTable {
Connection con = null;
Statement stmt = null;
Statement stmt1 = null;
ResultSet rs = null;
ResultSet rs1 = null;
PreparedStatement ps = null;
PreparedStatement ps1 = null;
public Format_BaseTable() {}
public static String valueOf(String oldStr)
StringTokenizer st = new StringTokenizer(oldStr.trim(), "-");
char zero = '0';
String dem_zero = ".0";
String newStr = "";
while(st.hasMoreTokens()) {
String degree = st.nextToken();
String minute = st.nextToken();
String second = st.nextToken();
if (minute.length() == 1) {
minute = zero + minute;
if (second.length() == 1) {
second = zero + second;
if (second.length() == 2) {
second = second + dem_zero;
if (second.length() == 3) {
second = zero + second;
if (second.length() == 5) {
double d = Double.parseDouble(second);
second = String.valueOf(Math.round(d));
newStr = degree + " " + minute + " " + second;
return newStr;
public static double feetToMeter(int ft)
double mt = ft * 0.305;
return mt;
public void doConvert() {
try {
Class.forName("oracle.jdbc.driver.OracleDriver");
con = DriverManager.getConnection("url","user","password");
stmt = con.createStatement();
stmt1 = con.createStatement();
rs = stmt.executeQuery("SELECT cla_seqnum, str_leased, nad27_lat, nad27_lon, nad83_lat, nad83_lon, ge_ft, sh_ft, osh_ft, ov_faa_approv_ft, ant_tip_ft, ant_ctr_line_ft FROM cl_antenna_base WHERE application_user_id = 'SQL LOADER'");
rs1 = stmt1.executeQuery("SELECT mwa_seqnum, nad27_lat, nad27_lon, nad83_lat, nad83_lon, ge_ft, osh_ft, cl_ft FROM mw_antenna_base WHERE application_user_id = 'SQL LOADER'");
int cl_seqnum = 0;
String leased = "";
String ownership = "";
String str_code = "";
String cl_nad27_lat = "";
String cl_nad27_lon = "";
String cl_nad83_lat = "";
String cl_nad83_lon = "";
int cl_ge_ft = 0;
int cl_ge_mt = 0;
int cl_sh_ft = 0;
int cl_sh_mt = 0;
int cl_osh_ft = 0;
int cl_osh_mt = 0;
int cl_ov_faa_approv_ft = 0;
int cl_ov_faa_approv_mt = 0;
int cl_ant_tip_ft = 0;
int cl_ant_tip_mt = 0;
int cl_ant_ctr_line_ft = 0;
int cl_ant_ctr_line_mt = 0;
int i = 1;
int mw_seqnum = 0;
String mw_nad27_lat = "";
String mw_nad27_lon = "";
String mw_nad83_lat = "";
String mw_nad83_lon = "";
int mw_ge_ft = 0;
int mw_ge_mt = 0;
int mw_osh_ft = 0;
int mw_osh_mt = 0;
int mw_cl_ft = 0;
int mw_cl_mt = 0;
int j = 1;
while(rs.next())                    // For Cellular/PCS
System.out.println("\n\nCellular/PCS Record #" + i);
cl_seqnum = rs.getInt("cla_seqnum");
System.out.println("cla_seqnum =" + cl_seqnum);
if (rs.getString("str_leased") != null) {
leased = rs.getString("str_leased");
} else {
leased = "";
     StringTokenizer st = new StringTokenizer(leased, "/");
while(st.hasMoreTokens()) {
     ownership = st.nextToken();
     str_code = st.nextToken();
if (rs.getString("nad27_lat") != null) {
cl_nad27_lat = valueOf(rs.getString("nad27_lat"));
} else {
cl_nad27_lat = "";
     System.out.println("cl_nad27_lat = " + cl_nad27_lat);
if (rs.getString("nad27_lon") != null) {
cl_nad27_lon = valueOf(rs.getString("nad27_lon"));
} else {
cl_nad27_lon = "";
System.out.println("cl_nad27_lon = " + cl_nad27_lon);
if (rs.getString("nad83_lat") != null) {
cl_nad83_lat = valueOf(rs.getString("nad83_lat"));
} else {
cl_nad83_lat = "";
System.out.println("cl_nad83_lat = " + cl_nad83_lat);
if (rs.getString("nad83_lon") != null) {
cl_nad83_lon = valueOf(rs.getString("nad83_lon"));
} else {
cl_nad83_lon = "";
System.out.println("cl_nad83_lon = " + cl_nad83_lon);
cl_ge_mt = (int)feetToMeter(rs.getInt("ge_ft"));
System.out.println("&&&&&&&&&&&&&&&&&&&cl_ge_mt = " + cl_ge_mt);
cl_sh_mt = (int)feetToMeter(rs.getInt("sh_ft"));
System.out.println("&&&&&&&&&&&&&&&&&&&cl_sh_mt = " + cl_sh_mt);
cl_osh_mt = (int)feetToMeter(rs.getInt("osh_ft"));
System.out.println("&&&&&&&&&&&&&&&&&&&cl_osh_mt = " + cl_osh_mt);
cl_ov_faa_approv_mt = (int)feetToMeter(rs.getInt("ov_faa_approv_ft"));
System.out.println("&&&&&&&&&&&&&&&&&&&cl_ov_faa_approv_mt = " + cl_ov_faa_approv_mt);
cl_ant_tip_mt = (int)feetToMeter(rs.getInt("ant_tip_ft"));
System.out.println("&&&&&&&&&&&&&&&&&&&cl_ant_tip_mt = " + cl_ant_tip_mt);
cl_ant_ctr_line_mt = (int)feetToMeter(rs.getInt("ant_ctr_line_ft"));
System.out.println("&&&&&&&&&&&&&&&&&&&cl_ant_ctr_line_mt = " + cl_ant_ctr_line_mt);
     // update NAD27 and NAD83 data in CL_ANTENNA table
ps = con.prepareStatement("UPDATE cl_antenna_base SET str_leased = ?, structure_code = ?, nad27_lat = ?, nad27_lon =?, nad83_lat = ?, nad83_lon = ?, ge_mt = ?, sh_mt = ?, osh_mt = ?, ov_faa_approv_mt = ?, ant_tip_mt = ?, ant_ctr_line_mt = ? WHERE cla_seqnum = " + cl_seqnum);
ps.setString(1, ownership);
ps.setString(2, str_code);
ps.setString(3, cl_nad27_lat);
ps.setString(4, cl_nad27_lon);
ps.setString(5, cl_nad83_lat);
ps.setString(6, cl_nad83_lon);
ps.setInt(7, cl_ge_mt);
ps.setInt(8, cl_sh_mt);
ps.setInt(9, cl_osh_mt);
ps.setInt(10, cl_ov_faa_approv_mt);
ps.setInt(11, cl_ant_tip_mt);
ps.setInt(12, cl_ant_ctr_line_mt);
     ps.executeUpdate();
     i++;
} // end of while
while(rs1.next())                    // For Microwave
System.out.println("\n\nMicrowave Record #" + j);
mw_seqnum = rs1.getInt("mwa_seqnum");
System.out.println("mw_seqnum =" + mw_seqnum);
if (rs1.getString("nad27_lat") != null) {
mw_nad27_lat = valueOf(rs1.getString("nad27_lat"));
} else {
mw_nad27_lat = "";
System.out.println("mw_nad27_lat = " + mw_nad27_lat);
if (rs1.getString("nad27_lon") != null) {
mw_nad27_lon = valueOf(rs1.getString("nad27_lon"));
} else {
mw_nad27_lon = "";
System.out.println("mw_nad27_lon = " + mw_nad27_lon);
if (rs1.getString("nad83_lat") != null) {
mw_nad83_lat = valueOf(rs1.getString("nad83_lat"));
} else {
mw_nad83_lat = "";
System.out.println("mw_nad83_lat = " + mw_nad83_lat);
if (rs1.getString("nad83_lon") != null) {
mw_nad83_lon = valueOf(rs1.getString("nad83_lon"));
} else {
mw_nad83_lon = "";
System.out.println("mw_nad83_lon = " + mw_nad83_lon);
mw_ge_mt = (int)feetToMeter(rs1.getInt("ge_ft"));
System.out.println("&&&&&&&&&&&&&&&&&&&mw_ge_mt = " + mw_ge_mt);
mw_osh_mt = (int)feetToMeter(rs1.getInt("osh_ft"));
System.out.println("&&&&&&&&&&&&&&&&&&&mw_osh_mt = " + mw_osh_mt);
mw_cl_mt = (int)feetToMeter(rs1.getInt("cl_ft"));
System.out.println("&&&&&&&&&&&&&&&&&&&mw_cl_mt = " + mw_cl_mt);
// update NAD27 and NAD83 data in MW_ANTENNA table
ps1 = con.prepareStatement("UPDATE mw_antenna_base SET nad27_lat = ?, nad27_lon =?, nad83_lat = ?, nad83_lon = ?, ge_mt = ?, osh_mt = ?, cl_mt = ? WHERE mwa_seqnum = " + mw_seqnum);
ps1.setString(1, mw_nad27_lat);
ps1.setString(2, mw_nad27_lon);
ps1.setString(3, mw_nad83_lat);
ps1.setString(4, mw_nad83_lon);
ps1.setInt(5, mw_ge_mt);
ps1.setInt(6, mw_osh_mt);
ps1.setInt(7, mw_cl_mt);
ps1.executeUpdate();
j++;
} // end of while
} catch(SQLException se) {
     System.out.println("SQL Exc" + se.getMessage());
se.printStackTrace();
} catch(Exception e) {
System.out.println(" Exc" + e.getMessage());
e.printStackTrace();
finally
          try
               rs.close();
               stmt.close();
               dbConn.freeConnection("system", conn);
               conn.close();
          } catch (SQLException e)
} // end of doConvert
public static void main(String args[]) {
Format_BaseTable old_nad = new Format_BaseTable();
old_nad.doConvert();
} // end of class

Firefox will not connect to another web site and it will not reopen after I close it.

I have removed Firefox and reinstalled it. I have tried to disable addons but it still will not open unless I reboot my computer. If this problem cannot be fixed easly, I will have to remove Firefox for good. When it is open, it will not connect to any URL I enter. When I close it it will not reopen and I get a message that says I have to restart Windows. This bug needs to be fixed. It worked one day and the next day it would not work.

A possible cause is security software (firewall) that blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program.
Remove all rules for Firefox from the permissions list in the firewall and let your firewall ask again for permission to get full unrestricted access to internet for Firefox and the plugin-container process and the updater process.
See:
* https://support.mozilla.com/kb/Server+not+found
* https://support.mozilla.com/kb/Firewalls
See "Hang at exit":
*http://kb.mozillazine.org/Firefox_hangs
*https://support.mozilla.com/kb/Firefox+hangs

Regd. Connection URL and Database Classname

Hi! All,
Can anyone help in the following mentioned below related issues:
I have created a stand-alone report template in CR-XI-R2 and using command passed the query to bring the resultset.
While bringing the resultset from network database from SIT and UAT, I need to pass "Connection URL" and "Database Classname" information to Crystal Report template file and need to hardcode, as for connection I have used JNDI-JDBC type and need to use that only.
How to avoid that hard coding issue? Please reply asap.
Please give a reply to Email id [email protected] also.
Regards,
Biplab Kumar Sarkar
+65 - 9398 2100

Assuming you are changing the database location at runtime, if you are using strictly JDBC then you will need to hard code the connection url and class name.
To avoid hard coding you potentially could use a JNDI connection which hides all of that on your application server. Or you could store the JDBC connection information in a properties file, and access the properties in your application, so at least the information is covered by a layer.

Clean-up code - Close Database Connection

I have a Stateless Session Bean that implements a Web Service. This bean opens a database connection. I need to close it before the application is undeployed or the Application Server (Glassfish) is restarted, etc. I have tried shutdown hooks, predestroy and preremove annotations but none of it works.
In a few words, I want to release resources when they are not needed, but not before that.
I have used Google in every way I can imagine but I haven't turned up with anything.
Any ideas?

Duffy, I appreciate your reponse on this issue. But what is the difference, seeing that a stateless bean is response-oriented afterwhich it is returned to the pool. Not sure I know what you mean here.
A pool of connections is not the same as a pool of stateless session beans. And I don't think that returning an instance of one to its pool necessarily means that the other is automagically cleaned up as well.
I will admit now that I'm not an EJB expert.
It almost seemed to me that you were saying you'd recommend making the size of the connection and SLSB pools identical. You'd dedicate one connection to each SLSB, marrying the two together for as long as ye both shall live.
I think the design will make acquiring a connection littered all over code body. If the connection will be reused in at least 2 method it is better to create the connection in the postConstruct annotated method and remember after the bean services the client request, it is in itself placed in a pool. So nothing is lost.Maybe you're right. I'm not much with EJBs. I use Spring exclusively.
%

Open and close database connection jsp page

hi there, i wanna know about how to open database connection to Mysql at the beginning of the page and close the connection at the end of the page. The jsp page contain all processing code.
plz help me...thx thx

<html>
<head>
<basefont face="Arial">
</head>
<body>
<%@ page language="java" import="java.sql.*" %>
<%!
// define variables
String id;
String firstName;
String lastName;
// define database parameters, change this according to your needs
String host="localhost";
String user="root";
String pass="";
String db="test";
String conn;
%>
<table border="1" cellspacing="1" cellpadding="5">
<tr>
<td><b>id</b></td>
<td><b>first name</b></td>
<td><b>last name</b></td>
</tr>
<%
Class.forName("org.gjt.mm.mysql.Driver");
// create connection string
conn = "jdbc:mysql://" + host + "/" + db + "?user=" + user
+ "&password=" + pass;
// pass database parameters to JDBC driver
Connection Conn = DriverManager.getConnection(conn);
// query statement
Statement SQLStatement = Conn.createStatement();
// generate query
// change this query according to your needs
String Query = "SELECT id, firstname, lastname FROM abook";
// get result
ResultSet SQLResult = SQLStatement.executeQuery(Query);
while(SQLResult.next())
   id = SQLResult.getString("id");
   firstName = SQLResult.getString("firstname");
   lastName = SQLResult.getString("lastname");
        out.println("<tr><td>" + id + "</td><td>" +
     firstName + "</td><td>" + lastName + "</td></tr>");
// close connection
SQLResult.close();
SQLStatement.close();
Conn.close();
%>
</table>
</body>
</html>hi :-)
i've got that on the net as part of the tutorial on jsp (long long time ago)
you just have to be resourceful in finding solutions :-)
try google :-) there are lot's of tutorial available in there ;-)
goodluck ;-)
regards,

How to correct close database connection after report generation

Hello
I have problem a with alive database connection after report creation and report closing. How to properly to close connection to database?
Best regards
Edited by: punkers84 on Jun 17, 2011 10:38 AM

that's what I am doing... after viewing the report, I call the close method on the window closing event of the container window. but the connection is still open. I had a lot of other issues with my jdbc driver but after downgrading to an older version those issues are resolved.Only this one is still there! Is there any other way to close the connection (like using dbcontroller or etc.)?

Database connection remains open after close being called

I am using oracle OC4J as my application server. I am not using connection pool and I am using non-pooled datasource to get connection. The database connection is made at runtime and then closed. I want to test if the users' connection sessions have been killed after they logout the application. But when I checked the table v$session in the database, it shows one connection remaining. I checked my program, the close method has been called. Does anybody know the solution?

Hi Chen,
This is just a suggestion for something to try -- only if you haven't
already tried it, that is!
Try running OC4J in "debug" mode. Here are details on how to do that:
http://kb.atlassian.com/content/atlassian/howto/orionproperties.jsp
Hope this helps you!
Good Luck,
Avi.

When and How to close database connection in JSP?

Hi there,
I am using MySQL and JDBC 3.0, in my system, When and How to close database connection in JSP?
Thanks in advance.
Lonely Wolf
<%@ page session="true" language="java" %>
<jsp:include page="checkauthorization.jsp" />
<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core" %>
<%@ taglib prefix="sql" uri="http://java.sun.com/jstl/sql" %>
<%--
Execute query, with wildcard characters added to the
parameter values used in the search criteria
--%>
<sql:query var="availablecomputerList" dataSource="jdbc/Bookingcomputer" scope="request">
SELECT * FROM computer where status=0
order by s_code
</sql:query>
<html>
<head>
<title>Search Result</title>
</head>
<body bgcolor="white">
<center>
<form action="checkin.jsp" method="post">
<input type="submit" value="Back to Check-in Page">
</form>
<c:choose>
<c:when test="${availablecomputerList.rowCount == 0}">
Sorry, no available computer found.
</c:when>
<c:otherwise>
The following available computers were found:
<table border="1">
<th>Computer</th>
<th>Description</th>
<th>Status</th>
<c:forEach items="${availablecomputerList.rows}" var="row">
<tr>
<td><c:out value="${row.s_code}" /></td>
<td><c:out value="${row.description}" /></td>
<td><c:out value="${row.status}" /></td>
</tr>
</c:forEach>
</table>
</c:otherwise>
</c:choose>
</center>
</body>
</html>

when should you close the connection? when you're done with it.
how should you close the connection? like this: conn.close();
that said, doing this in a JSP page is bad form and not recommended
JSP's typically don't contain ANY business or data logic

No redirection to different url upon http connections limit exceeded

Hi,
As of Standalone OC4j 10.1.2, if you want messages to be redirected to a different URL when the maximum connections limit is reached, you would include the HTTP redirect URL to max-http-connections tag inside server.xml.
<max-http-connections max-connections-queue-timeout="120" socket-backlog="50"
value="100">http://optional.redirect.url/page.jsp</max-http-connections>
I have a standalone OC4j 10.1.3, and would like to be able to redirect to different URL when maximum connections limit is reached but the above max-http-connections does not work and I am not redirected to different URL when maximum connectionns limit is reached. I read user guide of OC4j 10.1.3 and there is no mentioning of max-http-connections at all. In there, they talk about limiting concurrency via http thread pool but there is no discussion as to the mechanism of redirecting users to a different URL where I can display a user friendly message to say "Server is busy, please try again later..." instead of browser display a message "Page cannot be displayed"..
Please advice,
Thanks

Any thoughts on above issue ? please help.
thanks
Sam

I open facebook or other site. right click link/photo to open in new tab quickly. Then all tab connection will be connection to website, all page stop loading. Have to close firefox and reopen then only site will load.

I open facebook or other site. right click link/photo to open in new tab quickly. Then all tab connection will be connection to website, all page stop loading. Have to close firefox and reopen then only site will load.

You can override how links are opened via the browser.link.open_newwindow.override pref.
*http://kb.mozillazine.org/browser.link.open_newwindow
*1: current tab; 2:new window; 3:new tab;
Use this for links opened via JavaScript.
*http://kb.mozillazine.org/browser.link.open_newwindow.restriction
See also:
*http://kb.mozillazine.org/Prevent_websites_from_disabling_new_window_features

Firefox will not connect to internet after upgrade. The window pops up but shows "connecting " in tab. And then it sit there. Close it down and then try to reopen it and get message " Firefox already running, Exit program or shut down computer" ???

Firefox will not connect to internet after upgrade. The window pops up but shows "connecting " in tab. And then it sit there. Close it down and then try to reopen it and get message " Firefox already running, Exit program or shut down computer" ?????????????????

1st problem see http://kb.mozillazine.org/Firewalls
2nd problem, to close Firefox properly use File > Exit
:not with the [x] in upper right corner which close window
:see http://kb.mozillazine.org/Firefox_hangs#Hang_at_exit
:if restarting use "Restartless Restart" extension as mentioned there.
<br><small>Please mark "Solved" one answer that will best help others with a similar problem -- hope this was it.</small>

If I redirect url will database connection close ?

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