org.apache.commons.dbcp
public class PoolingConnection extends DelegatingConnection implements java.sql.Connection
DelegatingConnection
that pools PreparedStatement
s.
The prepareStatement(java.lang.String)
and prepareCall(java.lang.String)
methods, rather than creating a new PreparedStatement
each time, may actually pull the statement from a pool of unused statements.
The Statement.close()
method of the returned statement doesn't
actually close the statement, but rather returns it to the pool.
(See PoolablePreparedStatement
, PoolableCallableStatement
.)
PoolablePreparedStatement
Constructor and Description |
---|
PoolingConnection(java.sql.Connection c)
Constructor.
|
PoolingConnection(java.sql.Connection c,
KeyedObjectPool pool)
Constructor.
|
Modifier and Type | Method and Description |
---|---|
void |
activateObject(java.lang.Object key,
java.lang.Object obj)
KeyedPoolableObjectFactory method for activating
pooled statements. |
void |
close()
Close and free all
PreparedStatement s or CallableStatement from the pool, and
close the underlying connection. |
void |
destroyObject(java.lang.Object key,
java.lang.Object obj)
KeyedPoolableObjectFactory method for destroying
PoolablePreparedStatements and PoolableCallableStatements. |
java.lang.Object |
makeObject(java.lang.Object obj)
KeyedPoolableObjectFactory method for creating
PoolablePreparedStatement s or PoolableCallableStatement s. |
void |
passivateObject(java.lang.Object key,
java.lang.Object obj)
KeyedPoolableObjectFactory method for passivating
PreparedStatement s or CallableStatement s. |
java.sql.CallableStatement |
prepareCall(java.lang.String sql)
Create or obtain a
CallableStatement from the pool. |
java.sql.CallableStatement |
prepareCall(java.lang.String sql,
int resultSetType,
int resultSetConcurrency)
Create or obtain a
CallableStatement from the pool. |
java.sql.PreparedStatement |
prepareStatement(java.lang.String sql)
Create or obtain a
PreparedStatement from the pool. |
java.sql.PreparedStatement |
prepareStatement(java.lang.String sql,
int resultSetType,
int resultSetConcurrency)
Create or obtain a
PreparedStatement from the pool. |
java.lang.String |
toString()
Returns a string representation of the metadata associated with
the innnermost delegate connection.
|
boolean |
validateObject(java.lang.Object key,
java.lang.Object obj)
KeyedPoolableObjectFactory method for validating
pooled statements. |
clearWarnings, commit, createArrayOf, createBlob, createClob, createNClob, createSQLXML, createStatement, createStatement, createStatement, createStruct, equals, getAutoCommit, getCatalog, getClientInfo, getClientInfo, getDelegate, getHoldability, getInnermostDelegate, getMetaData, getTransactionIsolation, getTypeMap, getWarnings, hashCode, innermostDelegateEquals, isClosed, isReadOnly, isValid, isWrapperFor, nativeSQL, prepareCall, prepareStatement, prepareStatement, prepareStatement, prepareStatement, releaseSavepoint, rollback, rollback, setAutoCommit, setCatalog, setClientInfo, setClientInfo, setDelegate, setHoldability, setReadOnly, setSavepoint, setSavepoint, setTransactionIsolation, setTypeMap, unwrap
printStackTrace
clearWarnings, commit, createArrayOf, createBlob, createClob, createNClob, createSQLXML, createStatement, createStatement, createStatement, createStruct, getAutoCommit, getCatalog, getClientInfo, getClientInfo, getHoldability, getMetaData, getTransactionIsolation, getTypeMap, getWarnings, isClosed, isReadOnly, isValid, nativeSQL, prepareCall, prepareStatement, prepareStatement, prepareStatement, prepareStatement, releaseSavepoint, rollback, rollback, setAutoCommit, setCatalog, setClientInfo, setClientInfo, setHoldability, setReadOnly, setSavepoint, setSavepoint, setTransactionIsolation, setTypeMap
public PoolingConnection(java.sql.Connection c)
c
- the underlying Connection
.public PoolingConnection(java.sql.Connection c, KeyedObjectPool pool)
c
- the underlying Connection
.pool
- KeyedObjectPool
of PreparedStatement
s and CallableStatement
s.public void activateObject(java.lang.Object key, java.lang.Object obj) throws java.lang.Exception
KeyedPoolableObjectFactory
method for activating
pooled statements.key
- ignoredobj
- pooled statement to be activatedjava.lang.Exception
public void close() throws java.sql.SQLException
PreparedStatement
s or CallableStatement
from the pool, and
close the underlying connection.close
in interface java.sql.Connection
close
in class DelegatingConnection
java.sql.SQLException
public void destroyObject(java.lang.Object key, java.lang.Object obj) throws java.lang.Exception
KeyedPoolableObjectFactory
method for destroying
PoolablePreparedStatements and PoolableCallableStatements.
Closes the underlying statement.key
- ignoredobj
- the pooled statement to be destroyed.java.lang.Exception
public java.lang.Object makeObject(java.lang.Object obj) throws java.lang.Exception
KeyedPoolableObjectFactory
method for creating
PoolablePreparedStatement
s or PoolableCallableStatement
s.
The stmtType
field in the key determines whether
a PoolablePreparedStatement or PoolableCallableStatement is created.obj
- the key for the PreparedStatement
to be createdjava.lang.Exception
createKey(String, int, int, byte)
public void passivateObject(java.lang.Object key, java.lang.Object obj) throws java.lang.Exception
KeyedPoolableObjectFactory
method for passivating
PreparedStatement
s or CallableStatement
s.
Invokes PreparedStatement.clearParameters()
.key
- ignoredobj
- a PreparedStatement
java.lang.Exception
public java.sql.CallableStatement prepareCall(java.lang.String sql) throws java.sql.SQLException
CallableStatement
from the pool.prepareCall
in interface java.sql.Connection
prepareCall
in class DelegatingConnection
sql
- the sql string used to define the CallableStatementPoolableCallableStatement
java.sql.SQLException
public java.sql.CallableStatement prepareCall(java.lang.String sql, int resultSetType, int resultSetConcurrency) throws java.sql.SQLException
CallableStatement
from the pool.prepareCall
in interface java.sql.Connection
prepareCall
in class DelegatingConnection
sql
- the sql string used to define the CallableStatementresultSetType
- result set typeresultSetConcurrency
- result set concurrencyPoolableCallableStatement
java.sql.SQLException
public java.sql.PreparedStatement prepareStatement(java.lang.String sql) throws java.sql.SQLException
PreparedStatement
from the pool.prepareStatement
in interface java.sql.Connection
prepareStatement
in class DelegatingConnection
sql
- the sql string used to define the PreparedStatementPoolablePreparedStatement
java.sql.SQLException
public java.sql.PreparedStatement prepareStatement(java.lang.String sql, int resultSetType, int resultSetConcurrency) throws java.sql.SQLException
PreparedStatement
from the pool.prepareStatement
in interface java.sql.Connection
prepareStatement
in class DelegatingConnection
sql
- the sql string used to define the PreparedStatementresultSetType
- result set typeresultSetConcurrency
- result set concurrencyPoolablePreparedStatement
java.sql.SQLException
public java.lang.String toString()
DelegatingConnection
toString
in class DelegatingConnection
public boolean validateObject(java.lang.Object key, java.lang.Object obj)
KeyedPoolableObjectFactory
method for validating
pooled statements. Currently always returns true.key
- ignoredobj
- ignoredCopyright © 2001-2004 Apache Software Foundation. Documenation generated September 16 2014.