Maier Holger wrote:
Wouldn't it be better to read the
data source once in a singleton class
and then just get it back, i.e.
I did the same thing with my application where I did a key/value storage
object that was a singleton in my ServletContext. I did notice a slight
speed improvement and I've had zero issues.
//example factory configured by properties file
DataSourceFactory dsf =
DataSourceFactory.getInstance(servlet.getServletContext());
DataSource ds = dsf.getDataSource("hrdb");
Jacob Hookom
CS Student
University of Wisconsin, Eau Claire
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-----Original Message-----
From: Maier Holger, ITS-AKIS [mailto:[EMAIL PROTECTED]]
Sent: Monday, July 15, 2002 9:29 AM
To: 'Tomcat Users List'
Subject: DataSource Access - Design Question
Hi,
I am trying to get my DataSource
(with Connection Pooling) to run.
In the examples one always gets the
DataSource from JNDI and I have the
impression that everytime I want
to get my connection from DataSource
via a Context lookup.
Wouldn't it be better to read the
data source once in a singleton class
and then just get it back, i.e.
private DataSource ds;
...
public static void getDataSource() {
// if data source unknown read it from context
if (ds == null) {
try {
Context ctx = new InitialContext();
ds = (DataSource) ctx.lookup("java:comp/env/jdbc/myDataSource");
}
catch (..) {..}
}
return ds;
}
This should be faster than accessing the context
every time you need a datasource or a connection.
Could this lead into problems?
Any suggestions?
Cheers,
Holger
-----------------------------------------------------
Holger Maier Tel.: (06831) 47-3497
ITS-AKIS eMail: [EMAIL PROTECTED]
AG der Dillinger Hüttenwerke
Postfach 1580
66748 Dillingen
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