Test Connection Pooling

Question

i have writen a DBTester.java to test connection pooling.
when i run my program , every time it open a new connection ?
please help me where i did mistake ?
package db;
import oracle.jdbc.pool.OracleConnectionPoolDataSource;
* @author Jayaraj
public class DBTester {
     private static void test() throws Exception {
          OracleConnectionPoolDataSource ocpds = new OracleConnectionPoolDataSource();
          ocpds.setURL("jdbc:oracle:thin:@127.0.0.1:1521:db1");
          ocpds.setUser("root");
          ocpds.setPassword("root");
          for (int i = 0; i < 100; i++) {
               new RequestThread(i, ocpds).start();
     public static void main(String[] args) throws Exception {
          test();
package db;
import java.sql.Connection;
import java.sql.SQLException;
import javax.sql.PooledConnection;
import oracle.jdbc.pool.OracleConnectionPoolDataSource;
* @author Jayaraj
public class RequestThread extends Thread implements Runnable {
     private OracleConnectionPoolDataSource datasource = null;
     private int rid = 0;
     public RequestThread(int rid, OracleConnectionPoolDataSource datasource) {
          this.datasource = datasource;
          this.rid = rid;     
     public void run() {
          try {               
               PooledConnection pc = datasource.getPooledConnection();
               Connection conn = pc.getConnection();
               System.out.println(" Request ID :" + rid + " Connection : " + conn);
               conn.close();
          } catch (SQLException e) {
               e.printStackTrace();
}

Answer 1

I have tested few properties . this will be helpfull
thanks for all ur reply
package db.test;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.Properties;
import org.apache.commons.dbcp.DelegatingCallableStatement;
import oracle.jdbc.driver.OracleCallableStatement;
import oracle.jdbc.driver.OracleResultSet;
import oracle.jdbc.driver.OracleTypes;
import oracle.jdbc.pool.OracleConnectionCacheManager;
import oracle.jdbc.pool.OracleDataSource;
* @author Jayaraj
public class DBTester {
     public static void main(String[] args) throws Exception {
          OracleDataSource datasource = new OracleDataSource();
          datasource.setDataSourceName("oracle.jdbc.pool.OracleDataSource");
          datasource.setURL("jdbc:oracle:thin:@10.187.53.10:1521:TEST");
          datasource.setUser("wnr");
          datasource.setPassword("wnr");
          //enable the cache
          datasource.setConnectionCachingEnabled(true);
          Properties cacheProperties = new Properties();
          cacheProperties.setProperty("MinLimit", "2");                                                                      
          cacheProperties.setProperty("MaxLimit", "5");                                                                      
          cacheProperties.setProperty("InitialLimit", "3");
          //cacheProperties.setProperty("MaxStatementsLimit", "1");                                                                 
          cacheProperties.setProperty("InactivityTimeout", "10");
          //cacheProperties.setProperty("TimeToLiveTimeout", "");          
          cacheProperties.setProperty("AbandonedConnectionTimeout", "1");
          //cacheProperties.setProperty("ConnectionWaitTimeout", "");               
          //cacheProperties.setProperty("PropertyCheckInterval", "");
          //cacheProperties.setProperty("ValidateConnection", "");
          //cacheProperties.setProperty("ClosestConnectionMatch", "");
          //cacheProperties.setProperty("AttributeWeights", "");
          //cacheProperties.setProperty("LowerThresholdLimit", "");     
          datasource.setConnectionCacheProperties(cacheProperties);     
          System.out.println("testing initial limit");
          testInitialLimit(datasource);
          System.out.println("testing max limit");
          testMaxLimit(datasource);
     private static void testMaxLimit(OracleDataSource datasource) throws SQLException {
          String max = (String)datasource.getConnectionCacheProperties().get("MaxLimit");
          int maxi = Integer.parseInt(max);
          for (int i = 0; i < maxi ; i++) {
               //new TestThread(i,datasource).start();
               Connection conn =datasource.getConnection();
               System.out.println(i);
          System.out.println("waiting for existing to close....");
          Connection conn =datasource.getConnection();
          System.out.println("maximum connection reached.."+conn);
     static void showDetails() throws SQLException{
          OracleConnectionCacheManager sConnectionCacheMananger = OracleConnectionCacheManager.getConnectionCacheManagerInstance();
          String string[] = sConnectionCacheMananger.getCacheNameList();
          for (int i = 0; i < string.length; i++) {
               //System.out.println(string);
               System.out.println("AvailableConnections : "+sConnectionCacheMananger.getNumberOfAvailableConnections(string[i]));
               System.out.println("ActiveConnections : "+sConnectionCacheMananger.getNumberOfActiveConnections(string[i]));
     private static void testInitialLimit(OracleDataSource datasource ) throws SQLException {          
          Connection conn =datasource.getConnection();
          showDetails();     
          conn.close();