Thread: setting & using connection pool in beans for tomcat.

setting & using connection pool in beans for tomcat.

From

Simon Moses

Date:

16 December 2005, 09:17:04

dear sir,

i have set connection pooling in tomcat. now i can use connections from that pool in jsp.

but i want all database accessing code in beans not in jsp. how to do it?

i want to write a class(CPCon.java) with methods like
{
   void ConnectionPoolOpen(){}
   Connection getConnection(){}
   void closeConnection(){}
....
}

and call this class in all jsp pages with useBean tag.

if i write like this, is the connection pool is going to be used by all jsp pages for all tomcat server clients?

if not how to do this?

i am using tomcat 5.0. j2se1.4 and postgresql 8.0 with postgresql-8.0-312.jdbc3.jar driver.

regards,
Simon Moses.

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updated: 28 Sep 2004.
Simon Moses
**************************

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Re: setting & using connection pool in beans for tomcat.

From

Dave Cramer

Date:

16 December 2005, 10:06:14

Simon,

Have you looked at

http://jdbc.postgresql.org/documentation/head/tomcat.html

Dave
On 16-Dec-05, at 5:10 AM, Simon Moses wrote:

>  dear sir,
>
> i have set connection pooling in tomcat. now i can use connections
> from that pool in jsp.
>
> but i want all database accessing code in beans not in jsp. how to
> do it?
>
> i want to write a class(CPCon.java) with methods like
> {
>     void ConnectionPoolOpen(){}
>     Connection getConnection(){}
>     void closeConnection(){}
> ....
> }
>
> and call this class in all jsp pages with useBean tag.
>
> if i write like this, is the connection pool is going to be used by
> all jsp pages for all tomcat server clients?
>
> if not how to do this?
>
> i am using tomcat 5.0. j2se1.4 and postgresql 8.0 with
> postgresql-8.0-312.jdbc3.jar driver.
>
> regards,
> Simon Moses.
>
>
>
> **************************
> Visit My Home Page
> http://www.geocities.com/ks_moses
> updated: 28 Sep 2004.
> Simon Moses
> **************************
> __________________________________________________
> Do You Yahoo!?
> Tired of spam? Yahoo! Mail has the best spam protection around
> http://mail.yahoo.com

Re: setting & using connection pool in beans for tomcat.

From

Simon Moses

Date:

17 December 2005, 04:35:10

dear dave,

i have set connection pooling in tomcat. with the sample code now i can connect to pool from jsp.

the sample code given in that page is not connecting to my database. but same code in jsp is connecting.

but i want to write a .java file which should hold the database connection(from tomcat connection pool) code and have a getConnection method. the one i am using now is

<pre>

package com.moses.srivaru;

import java.sql.*;
import java.io.*;

public class DBCon{
    private Connection con = null;

    public DBCon(){
        try{
            String url = "jdbc:postgresql://localhost:5432/srivaru";
            Class.forName("org.postgresql.Driver");
            con = DriverManager.getConnection(url,"postgres","postgres");
        }catch(Exception e){System.out.println(e);}
    }

    public Connection getCon(){
        return con;
    }

    public void close(){
        try{
            con.close();
        }catch(Exception e){
            System.out.println(e);
        }
    }

}

</pre>

this class is in tomcat_home/common/classes/com/moses/srivaru
tell me where i should keep the new class which gives connection from tomcat connection pool.

thanks for your reply,
Simon Moses.

Dave Cramer <pg@fastcrypt.com> wrote:

Simon,

Have you looked at

http://jdbc.postgresql.org/documentation/head/tomcat.html

Dave
On 16-Dec-05, at 5:10 AM, Simon Moses wrote:

> dear sir,
>
> i have set connection pooling in tomcat. now i can use connections
> from that pool in jsp.
>
> but i want all database accessing code in beans not in jsp. how to
> do it?
>
> i want to write a class(CPCon.java) with methods like
> {
> void ConnectionPoolOpen(){}
> Connection getConnection(){}
> void closeConnection(){}
> ....
> }
>
> and call this class in all jsp pages with useBean tag.
>
> if i write like this, is the connection pool is going to be used by
> all jsp pages for all tomcat server clients?
>< br>> if not how to do this?
>
> i am using tomcat 5.0. j2se1.4 and postgresql 8.0 with
> postgresql-8.0-312.jdbc3.jar driver.
>
> regards,
> Simon Moses.
>
>
>
> **************************
> Visit My Home Page
> http://www.geocities.com/ks_moses
> updated: 28 Sep 2004.
> Simon Moses
> **************************
> __________________________________________________
> Do You Yahoo!?
> Tired of spam? Yahoo! Mail has the best spam protection around
> http://mail.yahoo.com

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**************************
Visit My Home Page
http://www.geocities.com/ks_moses
updated: 28 Sep 2004.
Simon Moses
**************************

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