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;
}
}
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