Hi,
Only if I close the connection after each SELECT the program runs fine, but
the thing is: I want to have more than one connection open at a time. Do
you know what could be the case?
gr.
Arjen
Arjen van der
Weijden To: "Jakarta Commons
Users List" <[email protected]>
<Arjen.van.der.Weijd cc:
[EMAIL PROTECTED]> Subject: Re: help on
DBCP
04/11/2005 11:00 AM
Please respond to
"Jakarta Commons
Users List"
Thanks Anshul,
Just returned from the weekend. I just replied to Dirk V. My problem seems
to be somewhat transcendental.
Arjen
"anshul khare"
<[EMAIL PROTECTED] To: "Jakarta Commons
Users List" <[email protected]>
ant.com> cc:
Subject: Re: help on DBCP
04/08/2005 08:45
PM
Please respond to
"Jakarta Commons
Users List"
Hey,
I guess the problem lies with the order in which you close the ResultSet,
Statement and Connection.
The "Statement"should be closed before the "ResultSet" followed by
"Connection". I had a similar problem and this fix worked for me.
Anshul
----- Original Message -----
From: "Arjen van der Weijden" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Friday, April 08, 2005 7:08 AM
Subject: help on DBCP
> Hi folks,
>
> Just started out examining DBCP, so I'm completely new to the subject.
> I adapted the example given by Dirk V. (given below). I put some stuff in
a
> for loop.
>
> The PROBLEM is that after a few loops the program seems to hang (less
than
> 10 connections).
>
> Can anybody help me on this, it must be someting trivial I guess?
>
> Configuration standard mysql installation on a redhat
>
____________________________________________________________________________
_________________
> public class DataSourceExample {
>
> public static void main(String[] args) {
> try {
> Class.forName("com.mysql.jdbc.Driver").newInstance();
> }
> catch (Exception ex) {
> ex.printStackTrace();
> }
>
> DataSource dataSource =
>
setupDataSource("jdbc:mysql://localhost/mysql?user=mysql&password=pizza");
>
> Connection conn = null;
> Statement stmt = null;
> ResultSet rset = null;
>
> for (int ii = 0; ii < 3; ii++) {
> try {
> for (int j = 0; j < 3; j++) {
> conn = dataSource.getConnection();
> stmt = conn.createStatement();
> String $query = "SELECT * FROM user";
> rset = stmt.executeQuery($query);
> System.out.println("Results:");
> int numcols = rset.getMetaData().getColumnCount();
> while(rset.next()) {
> for(int i=1;i<=numcols;i++) {
> System.out.print("\t" + rset.getString(i));
> }
> System.out.println("");
> }
> }
> } catch(SQLException e) {
> e.printStackTrace();
> } finally {
> try { rset.close(); } catch(Exception e) { }
> try { stmt.close(); } catch(Exception e) { }
> try { conn.close(); } catch(Exception e) { }
> }
> }
> }
>
> public static DataSource setupDataSource(String connectURI) {
> ConnectionFactory connectionFactory = new
> DriverManagerConnectionFactory(connectURI,null);
> PoolableConnectionFactory poolableConnectionFactory = new \
>
>
PoolableConnectionFactory(connectionFactory,connectionPool,null,null,false,t
rue);
> PoolingDataSource dataSource = new
> PoolingDataSource(connectionPool);
> return dataSource;
> }
> }
>
____________________________________________________________________________
>
> DISCLAIMER: http://www.rivm.nl/disclaimer
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: [EMAIL PROTECTED]
> For additional commands, e-mail: [EMAIL PROTECTED]
>
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
