Oracle Connection Pool Class

Question

I want to setup a connection pool for a Oracle DB in a Helper class.

public class DbConnection {

// Data source for the pooled connection
private static Ora         


        

Answer 1

You should not use a ConnectionPoolDataSource directly. It is intended for use by a connection pool in an application server. It does not provide connection pooling itself. See also https://stackoverflow.com/a/12651163/466862

In other words: You need to use an actual connection pool, like DBCP, c3p0 or BoneCP, or the UCP (Universal Connection Pool).

Answer 2

You need you to use OracleDataSource (not OracleConnectionPoolDataSource) and set setConnectionCachingEnabled(true).

     private  static OracleDataSource ods = null;
     ...
     static {
        System.out.println("OracleDataSource Initialization");
        try {
            ods = new OracleDataSource();
            ods.setConnectionCachingEnabled(true);
            ods.setConnectionCacheName("mycache");
            ods.setURL("jdbc:oracle:thin:@//server.local:1521/prod");
            ods.setUser("scott");
            ods.setPassword("tiger");
            Properties cacheProps = new Properties();
            cacheProps.setProperty("MinLimit", "1");
            cacheProps.setProperty("MaxLimit", "4");
            cacheProps.setProperty("InitialLimit", "1");
            cacheProps.setProperty("ConnectionWaitTimeout", "5");
            cacheProps.setProperty("ValidateConnection", "true");
            ods.setConnectionCacheProperties(cacheProps);

        }
        catch (SQLException e) {
            e.printStackTrace();
        }
    }
...
    public static Connection getConnection()
       throws SQLException {
      return ods.getConnection();
    }

Complete example here.

Answer 3

oracle.jdbc.pool.OracleDataSource.setConnectionCachingEnabled documentation state the following:

Deprecated. Use Oracle Universal Connection Pool instead.

You can download Oracle Database UCP and create your DataSource as follows:

import oracle.jdbc.pool.OracleDataSource;
import oracle.ucp.jdbc.PoolDataSource;
import oracle.ucp.jdbc.PoolDataSourceFactory;

PoolDataSource poolDataSource = PoolDataSourceFactory.getPoolDataSource();
poolDataSource.setConnectionFactoryClassName(OracleDataSource.class.getName());
poolDataSource.setURL("jdbc:oracle:thin:@localhost:1521:XE");
poolDataSource.setUser("SYSTEM");
poolDataSource.setPassword("****");