connection pooling: connection, oracle, pooling

connection pooling

How can we implement connection pooling both at the database level(Oracle connection pooling) and at the application level(java connection pooling).The application is written in java.
Which is the better practice?

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The concept of connection pooling is not relevant to the server-side internal driver, where you are simply using the default connection, and is only relevant to the server-side Thin driver within a single session.

A simple Pooled Connection Sample

import java.sql.*;
import javax.sql.*;
import oracle.jdbc.driver.*;
import oracle.jdbc.pool.*;

class PooledConnection1
{
public static void main (String args [])
throws SQLException
{

// Create a OracleConnectionPoolDataSource instance
OracleConnectionPoolDataSource ocpds =
new OracleConnectionPoolDataSource();

// Set connection parameters
ocpds.setURL("jdbc:oracle:oci8:@");
ocpds.setUser("scott");
ocpds.setPassword("tiger");

// Create a pooled connection
PooledConnection pc = ocpds.getPooledConnection();

// Get a Logical connection
Connection conn = pc.getConnection();

// Create a Statement
Statement stmt = conn.createStatement ();

// Select the ENAME column from the EMP table
ResultSet rset = stmt.executeQuery ("select ENAME from EMP");

// Iterate through the result and print the employee names
while (rset.next ())
System.out.println (rset.getString (1));

// Close the RseultSet
rset.close();
rset = null;

// Close the Statement
stmt.close();
stmt = null;

// Close the logical connection
conn.close();
conn = null;

// Close the pooled connection
pc.close();
pc = null;
}
}

Regards,

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connection pooling

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connection

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Oracle Database

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