Oracle Connection Pool DataSource : OracleDataSource « Database SQL JDBC « Java

1. Java
2. Database SQL JDBC
3. OracleDataSource

Oracle Connection Pool DataSource

 
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.Statement;

import javax.sql.PooledConnection;

import oracle.jdbc.pool.OracleConnectionPoolDataSource;

public class ConnPool {
  public static void main(String[] args) throws Exception {
    OracleConnectionPoolDataSource ocpds = new OracleConnectionPoolDataSource();
    ocpds.setURL("jdbc:oracle:thin:@localhost:1521:ORCL");
    ocpds.setUser("user");
    ocpds.setPassword("password");

    PooledConnection pc_1 = ocpds.getPooledConnection();

    Connection conn_1 = pc_1.getConnection();
    Statement stmt = conn_1.createStatement();

    ResultSet rs = stmt.executeQuery("SELECT count(*) FROM v$session WHERE username = 'SYS'");
    rs.next();
    String msg = "Total connections after ";
    System.out.println(msg + "conn_1: " + rs.getString(1));

    Connection conn_2 = pc_1.getConnection();
    stmt = conn_2.createStatement();
    rs = stmt.executeQuery("SELECT count(*) FROM v$session WHERE username = 'SYS'");
    rs.next();
    System.out.println(msg + "conn_2: " + rs.getString(1));

    PooledConnection pc_2 = ocpds.getPooledConnection();
    rs = stmt.executeQuery("SELECT count(*) FROM v$session WHERE username = 'SYS'");
    rs.next();
    System.out.println(msg + "pc_2: " + rs.getString(1));

    conn_1.close();
    conn_2.close();
    pc_1.close();
    pc_2.close();
  }
}

 

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