OCI Connection Pool

Question

Hi,
How do I use an OCI Connection Pool as a data source in OC4J?
A sample data-sources.xml would be helpful.
A snippet of servlet code would be great!
Thanks

Answer 1

Hi,
OracleOCIConnectionPool extends OracleDataSource and I have
created and attached a example test case OCIConnPoolJNDI.java of
how to register this OCI pool object via JNDI InitialContext and
look it up.
The test assumes a default directory /tmp/JNDI/jndi_dir to exist
that can be changed. You also need dbjava/lib/jndi.zip (or
jndi.jar) and jis/lib/aurora_client.jar in your CLASSPATH
* Different Config test for connection pooling
import java.sql.*;
import java.io.*;
import java.util.*;
import java.math.BigDecimal;
import oracle.jdbc.*;
import oracle.jdbc.pool.*;
import oracle.jdbc.oci.*;
import oracle.sql.*;
import javax.naming.*;
import javax.naming.spi.*;
import javax.sql.*;
public class OCIConnPoolJNDI
public static void main(String args[]) throws SQLException,
NamingException
String url = "jdbc:oracle:oci8:@" ;
Context ctx = null;
Hashtable env = new Hashtable (5);
env.put (Context.INITIAL_CONTEXT_FACTORY,
"com.sun.jndi.fscontext.RefFSContextFactory");
String fileDir = "file:/tmp/JNDI";
System.out.println("fileDir = " + fileDir);
env.put (Context.PROVIDER_URL, fileDir);
ctx = new InitialContext(env);
Properties poolconfig = new Properties( ) ;
poolconfig.put(OracleOCIConnectionPool.CONNPOOL_MIN_LIMIT,
"1") ;
poolconfig.put(OracleOCIConnectionPool.CONNPOOL_MAX_LIMIT,
"10") ;
poolconfig.put(OracleOCIConnectionPool.CONNPOOL_INCREMENT,
"2") ;
poolconfig.put(OracleOCIConnectionPool.CONNPOOL_NOWAIT,
"true") ;
poolconfig.put(OracleOCIConnectionPool.TRANSACTIONS_DISTRIBUTED,
"true") ;
OracleOCIConnectionPool ods = new OracleOCIConnectionPool
("scott", "tiger", url, poolconfig);
System.out.println("-- Doing the Bind --");
ctx.bind ("jndi_dir/tkpjcpdb1",ods);
ods.close();
System.out.println("-- Doing the Lookup --");
OracleOCIConnectionPool cpool = (OracleOCIConnectionPool)
ctx.lookup
("jndi_dir/tkpjcpdb1");
test1(cpool);
// Close the connection
cpool.close();
cpool = null;
public static void test1(OracleOCIConnectionPool cpool)
throws SQLException
System.out.println ("User = " + cpool.getUser());
System.out.println ("URL = " + cpool.getURL());
System.out.println ("Default Min poolsize Limit = " +
cpool.getMinLimit());
System.out.println ("Default Max poolsize Limit = " +
cpool.getMaxLimit());
System.out.println ("Default Connection Increment = " +
cpool.getConnectionIncrement());
java.util.Properties p = new java.util.Properties( );
p.put (OracleOCIConnectionPool.CONNPOOL_MIN_LIMIT, "1") ;
p.put (OracleOCIConnectionPool.CONNPOOL_MAX_LIMIT, "1") ;
p.put (OracleOCIConnectionPool.CONNPOOL_INCREMENT, "0") ;
cpool.setPoolConfig(p);
System.out.println ("Set Min poolsize Limit = " +
cpool.getMinLimit());
System.out.println ("Set Max poolsize Limit = " +
cpool.getMaxLimit());
System.out.println ("Set Connection Increment = " +
cpool.getConnectionIncrement());
//get a connection from the pool
OracleOCIConnection conn1 = (OracleOCIConnection)
cpool.getConnection();
OracleOCIConnection conn2 = (OracleOCIConnection)
cpool.getConnection();
OracleOCIConnection conn3 = (OracleOCIConnection)
cpool.getConnection();
System.out.println("ActiveSize of pool = " +
cpool.getActiveSize());
System.out.println("PoolSize = " + cpool.getPoolSize());
testConn1(conn1);
testConn1(conn2);
testConn1(conn3);
conn1.close();
conn2.close();
conn3.close();
public static void testConn1 (OracleOCIConnection conn)
throws SQLException
System.out.println ("Got Pooled connection ...");
// try operations via the pool
Statement stmt = conn.createStatement ();
ResultSet rset = stmt.executeQuery ("select USER from
dual");
while (rset.next ())
System.out.println (" User = " + rset.getString (1));
rset.close();
stmt.close();