org.apache.commons.dbcp2

Class PoolingConnection

java.lang.Object

org.apache.commons.dbcp2.AbandonedTrace

org.apache.commons.dbcp2.DelegatingConnection<java.sql.Connection>

org.apache.commons.dbcp2.PoolingConnection

All Implemented Interfaces:

java.lang.AutoCloseable, java.sql.Connection, java.sql.Wrapper, org.apache.commons.pool2.KeyedPooledObjectFactory<PStmtKey,DelegatingPreparedStatement>, org.apache.commons.pool2.TrackedUse

public class PoolingConnection
extends DelegatingConnection<java.sql.Connection>
implements org.apache.commons.pool2.KeyedPooledObjectFactory<PStmtKey,DelegatingPreparedStatement>

A DelegatingConnection that pools PreparedStatements.

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.)

Since:

2.0

Version:

$Id: PoolingConnection.java 1658644 2015-02-10 08:59:07Z tn $

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

Constructors

Constructor and Description
PoolingConnection(java.sql.Connection c) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
void	activateObject(PStmtKey key, org.apache.commons.pool2.PooledObject<DelegatingPreparedStatement> p) KeyedPooledObjectFactory method for activating pooled statements.
void	close() Close and free all PreparedStatements or CallableStatements from the pool, and close the underlying connection.
void	destroyObject(PStmtKey key, org.apache.commons.pool2.PooledObject<DelegatingPreparedStatement> p) KeyedPooledObjectFactory method for destroying PoolablePreparedStatements and PoolableCallableStatements.
org.apache.commons.pool2.PooledObject<DelegatingPreparedStatement>	makeObject(PStmtKey key) KeyedPooledObjectFactory method for creating PoolablePreparedStatements or PoolableCallableStatements.
void	passivateObject(PStmtKey key, org.apache.commons.pool2.PooledObject<DelegatingPreparedStatement> p) KeyedPooledObjectFactory method for passivating PreparedStatements or CallableStatements.
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 autoGeneratedKeys)
java.sql.PreparedStatement	prepareStatement(java.lang.String sql, int resultSetType, int resultSetConcurrency) Create or obtain a PreparedStatement from the pool.
void	setStatementPool(org.apache.commons.pool2.KeyedObjectPool<PStmtKey,DelegatingPreparedStatement> pool)
java.lang.String	toString() Returns a string representation of the metadata associated with the innermost delegate connection.
boolean	validateObject(PStmtKey key, org.apache.commons.pool2.PooledObject<DelegatingPreparedStatement> p) KeyedPooledObjectFactory method for validating pooled statements.

Methods inherited from class org.apache.commons.dbcp2.DelegatingConnection

abort, clearCachedState, clearWarnings, commit, createArrayOf, createBlob, createClob, createNClob, createSQLXML, createStatement, createStatement, createStatement, createStruct, getAutoCommit, getCacheState, getCatalog, getClientInfo, getClientInfo, getDefaultQueryTimeout, getDelegate, getHoldability, getInnermostDelegate, getInnermostDelegateInternal, getMetaData, getNetworkTimeout, getSchema, getTransactionIsolation, getTypeMap, getWarnings, innermostDelegateEquals, isClosed, isReadOnly, isValid, isWrapperFor, nativeSQL, prepareCall, prepareStatement, prepareStatement, prepareStatement, releaseSavepoint, rollback, rollback, setAutoCommit, setCacheState, setCatalog, setClientInfo, setClientInfo, setDefaultQueryTimeout, setDelegate, setHoldability, setNetworkTimeout, setReadOnly, setSavepoint, setSavepoint, setSchema, setTransactionIsolation, setTypeMap, unwrap

Methods inherited from class org.apache.commons.dbcp2.AbandonedTrace

getLastUsed

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

PoolingConnection

public PoolingConnection(java.sql.Connection c)

Constructor.

Parameters:

c - the underlying Connection.

Method Detail

activateObject

public void activateObject(PStmtKey key,
                  org.apache.commons.pool2.PooledObject<DelegatingPreparedStatement> p)
                    throws java.lang.Exception

KeyedPooledObjectFactory method for activating pooled statements.

Specified by:

activateObject in interface org.apache.commons.pool2.KeyedPooledObjectFactory<PStmtKey,DelegatingPreparedStatement>

Parameters:

key - ignored

p - wrapped pooled statement to be activated

Throws:

java.lang.Exception

close

public void close()
           throws java.sql.SQLException

Close and free all PreparedStatements or CallableStatements from the pool, and close the underlying connection.

Specified by:

close in interface java.lang.AutoCloseable

Specified by:

close in interface java.sql.Connection

Overrides:

close in class DelegatingConnection<java.sql.Connection>

Throws:

java.sql.SQLException

destroyObject

public void destroyObject(PStmtKey key,
                 org.apache.commons.pool2.PooledObject<DelegatingPreparedStatement> p)
                   throws java.lang.Exception

KeyedPooledObjectFactory method for destroying PoolablePreparedStatements and PoolableCallableStatements. Closes the underlying statement.

Specified by:

destroyObject in interface org.apache.commons.pool2.KeyedPooledObjectFactory<PStmtKey,DelegatingPreparedStatement>

Parameters:

key - ignored

p - the wrapped pooled statement to be destroyed.

Throws:

java.lang.Exception

makeObject

public org.apache.commons.pool2.PooledObject<DelegatingPreparedStatement> makeObject(PStmtKey key)
                                                                              throws java.lang.Exception

KeyedPooledObjectFactory method for creating PoolablePreparedStatements or PoolableCallableStatements. The stmtType field in the key determines whether a PoolablePreparedStatement or PoolableCallableStatement is created.

Specified by:

makeObject in interface org.apache.commons.pool2.KeyedPooledObjectFactory<PStmtKey,DelegatingPreparedStatement>

Parameters:

key - the key for the PreparedStatement to be created

Throws:

java.lang.Exception

See Also:

createKey(String, int, int, StatementType)

passivateObject

public void passivateObject(PStmtKey key,
                   org.apache.commons.pool2.PooledObject<DelegatingPreparedStatement> p)
                     throws java.lang.Exception

KeyedPooledObjectFactory method for passivating PreparedStatements or CallableStatements. Invokes PreparedStatement.clearParameters().

Specified by:

passivateObject in interface org.apache.commons.pool2.KeyedPooledObjectFactory<PStmtKey,DelegatingPreparedStatement>

Parameters:

key - ignored

p - a wrapped PreparedStatement

Throws:

java.lang.Exception

prepareCall

public java.sql.CallableStatement prepareCall(java.lang.String sql)
                                       throws java.sql.SQLException

Create or obtain a CallableStatement from the pool.

Specified by:

prepareCall in interface java.sql.Connection

Overrides:

prepareCall in class DelegatingConnection<java.sql.Connection>

Parameters:

sql - the sql string used to define the CallableStatement

Returns:

a PoolableCallableStatement

Throws:

java.sql.SQLException

prepareCall

public java.sql.CallableStatement prepareCall(java.lang.String sql,
                                     int resultSetType,
                                     int resultSetConcurrency)
                                       throws java.sql.SQLException

Create or obtain a CallableStatement from the pool.

Specified by:

prepareCall in interface java.sql.Connection

Overrides:

prepareCall in class DelegatingConnection<java.sql.Connection>

Parameters:

sql - the sql string used to define the CallableStatement

resultSetType - result set type

resultSetConcurrency - result set concurrency

Returns:

a PoolableCallableStatement

Throws:

java.sql.SQLException

prepareStatement

public java.sql.PreparedStatement prepareStatement(java.lang.String sql)
                                            throws java.sql.SQLException

Create or obtain a PreparedStatement from the pool.

Specified by:

prepareStatement in interface java.sql.Connection

Overrides:

prepareStatement in class DelegatingConnection<java.sql.Connection>

Parameters:

sql - the sql string used to define the PreparedStatement

Returns:

a PoolablePreparedStatement

Throws:

java.sql.SQLException

prepareStatement

public java.sql.PreparedStatement prepareStatement(java.lang.String sql,
                                          int autoGeneratedKeys)
                                            throws java.sql.SQLException

Specified by:

prepareStatement in interface java.sql.Connection

Overrides:

prepareStatement in class DelegatingConnection<java.sql.Connection>

Throws:

java.sql.SQLException

prepareStatement

public java.sql.PreparedStatement prepareStatement(java.lang.String sql,
                                          int resultSetType,
                                          int resultSetConcurrency)
                                            throws java.sql.SQLException

Create or obtain a PreparedStatement from the pool.

Specified by:

prepareStatement in interface java.sql.Connection

Overrides:

prepareStatement in class DelegatingConnection<java.sql.Connection>

Parameters:

sql - the sql string used to define the PreparedStatement

resultSetType - result set type

resultSetConcurrency - result set concurrency

Returns:

a PoolablePreparedStatement

Throws:

java.sql.SQLException

setStatementPool

public void setStatementPool(org.apache.commons.pool2.KeyedObjectPool<PStmtKey,DelegatingPreparedStatement> pool)

toString

public java.lang.String toString()

Description copied from class: DelegatingConnection

Returns a string representation of the metadata associated with the innermost delegate connection.

Overrides:

toString in class DelegatingConnection<java.sql.Connection>

validateObject

public boolean validateObject(PStmtKey key,
                     org.apache.commons.pool2.PooledObject<DelegatingPreparedStatement> p)

KeyedPooledObjectFactory method for validating pooled statements. Currently always returns true.

Specified by:

validateObject in interface org.apache.commons.pool2.KeyedPooledObjectFactory<PStmtKey,DelegatingPreparedStatement>

Parameters:

key - ignored

p - ignored

Returns:

true