org.apache.commons.dbcp
Class PoolingConnection

java.lang.Object
  extended byorg.apache.commons.dbcp.AbandonedTrace
      extended byorg.apache.commons.dbcp.DelegatingConnection
          extended byorg.apache.commons.dbcp.PoolingConnection
All Implemented Interfaces:
Connection

public class PoolingConnection
extends DelegatingConnection
implements Connection

A DelegatingConnection that pools PreparedStatements.

My prepareStatement(java.lang.String) methods, rather than creating a new PreparedStatement each time, may actually pull the PreparedStatement from a pool of unused statements. The Statement.close() method of the returned PreparedStatement doesn't actually close the statement, but rather returns it to my pool. (See PoolablePreparedStatement.)

Version:
$Revision: 1.14 $ $Date: 2004/03/07 15:26:38 $
Author:
Rodney Waldhoff, Dirk Verbeeck
See Also:
PoolablePreparedStatement

Field Summary
 
Fields inherited from interface java.sql.Connection
TRANSACTION_NONE, TRANSACTION_READ_COMMITTED, TRANSACTION_READ_UNCOMMITTED, TRANSACTION_REPEATABLE_READ, TRANSACTION_SERIALIZABLE
 
Constructor Summary
PoolingConnection(Connection c)
          Constructor.
PoolingConnection(Connection c, KeyedObjectPool pool)
          Constructor.
 
Method Summary
 void activateObject(Object key, Object obj)
          My KeyedPoolableObjectFactory method for activating PreparedStatements.
 void close()
          Close and free all PreparedStatements from my pool, and close my underlying connection.
 void destroyObject(Object key, Object obj)
          My KeyedPoolableObjectFactory method for destroying PreparedStatements.
 Object makeObject(Object obj)
          My KeyedPoolableObjectFactory method for creating PreparedStatements.
 void passivateObject(Object key, Object obj)
          My KeyedPoolableObjectFactory method for passivating PreparedStatements.
 PreparedStatement prepareStatement(String sql)
          Create or obtain a PreparedStatement from my pool.
 PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency)
          Create or obtain a PreparedStatement from my pool.
 String toString()
           
 boolean validateObject(Object key, Object obj)
          My KeyedPoolableObjectFactory method for validating PreparedStatements.
 
Methods inherited from class org.apache.commons.dbcp.DelegatingConnection
clearWarnings, commit, createStatement, createStatement, createStatement, equals, getAutoCommit, getCatalog, getDelegate, getHoldability, getInnermostDelegate, getMetaData, getTransactionIsolation, getTypeMap, getWarnings, hashCode, isClosed, isReadOnly, nativeSQL, prepareCall, prepareCall, prepareCall, prepareStatement, prepareStatement, prepareStatement, prepareStatement, releaseSavepoint, rollback, rollback, setAutoCommit, setCatalog, setDelegate, setHoldability, setReadOnly, setSavepoint, setSavepoint, setTransactionIsolation, setTypeMap
 
Methods inherited from class org.apache.commons.dbcp.AbandonedTrace
printStackTrace
 
Methods inherited from class java.lang.Object
getClass, notify, notifyAll, wait, wait, wait
 
Methods inherited from interface java.sql.Connection
clearWarnings, commit, createStatement, createStatement, createStatement, getAutoCommit, getCatalog, getHoldability, getMetaData, getTransactionIsolation, getTypeMap, getWarnings, isClosed, isReadOnly, nativeSQL, prepareCall, prepareCall, prepareCall, prepareStatement, prepareStatement, prepareStatement, prepareStatement, releaseSavepoint, rollback, rollback, setAutoCommit, setCatalog, setHoldability, setReadOnly, setSavepoint, setSavepoint, setTransactionIsolation, setTypeMap
 

Constructor Detail

PoolingConnection

public PoolingConnection(Connection c)
Constructor.

Parameters:
c - the underlying Connection.

PoolingConnection

public PoolingConnection(Connection c,
                         KeyedObjectPool pool)
Constructor.

Parameters:
c - the underlying Connection.
Method Detail

activateObject

public void activateObject(Object key,
                           Object obj)
                    throws Exception
My KeyedPoolableObjectFactory method for activating PreparedStatements. (Currently a no-op.)

Parameters:
key - ignored
obj - ignored
Throws:
Exception

close

public void close()
           throws SQLException
Close and free all PreparedStatements from my pool, and close my underlying connection.

Specified by:
close in interface Connection
Overrides:
close in class DelegatingConnection
Throws:
SQLException

destroyObject

public void destroyObject(Object key,
                          Object obj)
                   throws Exception
My KeyedPoolableObjectFactory method for destroying PreparedStatements.

Parameters:
key - ignored
obj - the PreparedStatement to be destroyed.
Throws:
Exception

makeObject

public Object makeObject(Object obj)
                  throws Exception
My KeyedPoolableObjectFactory method for creating PreparedStatements.

Parameters:
obj - the key for the PreparedStatement to be created
Throws:
Exception

passivateObject

public void passivateObject(Object key,
                            Object obj)
                     throws Exception
My KeyedPoolableObjectFactory method for passivating PreparedStatements. Currently invokes PreparedStatement.clearParameters().

Parameters:
key - ignored
obj - a PreparedStatement
Throws:
Exception

prepareStatement

public PreparedStatement prepareStatement(String sql)
                                   throws SQLException
Create or obtain a PreparedStatement from my pool.

Specified by:
prepareStatement in interface Connection
Overrides:
prepareStatement in class DelegatingConnection
Returns:
a PoolablePreparedStatement
Throws:
SQLException

prepareStatement

public PreparedStatement prepareStatement(String sql,
                                          int resultSetType,
                                          int resultSetConcurrency)
                                   throws SQLException
Create or obtain a PreparedStatement from my pool.

Specified by:
prepareStatement in interface Connection
Overrides:
prepareStatement in class DelegatingConnection
Returns:
a PoolablePreparedStatement
Throws:
SQLException

toString

public String toString()

validateObject

public boolean validateObject(Object key,
                              Object obj)
My KeyedPoolableObjectFactory method for validating PreparedStatements.

Parameters:
key - ignored
obj - ignored
Returns:
true


Copyright © 2001-2003 Apache Software Foundation. Documenation generated October 13 2005.