public class PoolingConnection extends DelegatingConnection implements KeyedPoolableObjectFactory<PStmtKey,DelegatingPreparedStatement>
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.)
PoolablePreparedStatement| Modifier and Type | Class and Description |
|---|---|
static class |
PoolingConnection.StatementType |
| Modifier and Type | Field and Description |
|---|---|
protected KeyedObjectPool<PStmtKey,DelegatingPreparedStatement> |
_pstmtPool
Pool of
PreparedStatements. and CallableStatements |
_closed, _connTRANSACTION_NONE, TRANSACTION_READ_COMMITTED, TRANSACTION_READ_UNCOMMITTED, TRANSACTION_REPEATABLE_READ, TRANSACTION_SERIALIZABLE| Constructor and Description |
|---|
PoolingConnection(Connection c)
Constructor.
|
PoolingConnection(Connection c,
KeyedObjectPool<PStmtKey,DelegatingPreparedStatement> pool)
Constructor.
|
| Modifier and Type | Method and Description |
|---|---|
void |
activateObject(PStmtKey key,
DelegatingPreparedStatement obj)
KeyedPoolableObjectFactory method for activating
pooled statements. |
void |
close()
Close and free all
PreparedStatements or CallableStatement from the pool, and
close the underlying connection. |
protected PStmtKey |
createKey(String sql)
Create a PStmtKey for the given arguments.
|
protected PStmtKey |
createKey(String sql,
int autoGeneratedKeys) |
protected PStmtKey |
createKey(String sql,
int[] columnIndexes) |
protected PStmtKey |
createKey(String sql,
int resultSetType,
int resultSetConcurrency)
Create a PStmtKey for the given arguments.
|
protected PStmtKey |
createKey(String sql,
int resultSetType,
int resultSetConcurrency,
int resultSetHoldability) |
protected PStmtKey |
createKey(String sql,
int resultSetType,
int resultSetConcurrency,
int resultSetHoldability,
PoolingConnection.StatementType statementType) |
protected PStmtKey |
createKey(String sql,
int resultSetType,
int resultSetConcurrency,
PoolingConnection.StatementType stmtType)
Create a PStmtKey for the given arguments.
|
protected PStmtKey |
createKey(String sql,
PoolingConnection.StatementType stmtType)
Create a PStmtKey for the given arguments.
|
protected PStmtKey |
createKey(String sql,
String[] columnNames)
Create a PStmtKey for the given arguments.
|
void |
destroyObject(PStmtKey key,
DelegatingPreparedStatement obj)
KeyedPoolableObjectFactory method for destroying
PoolablePreparedStatements and PoolableCallableStatements. |
DelegatingPreparedStatement |
makeObject(PStmtKey key)
KeyedPoolableObjectFactory method for creating
PoolablePreparedStatements or PoolableCallableStatements. |
protected String |
normalizeSQL(String sql)
Normalize the given SQL statement, producing a
cannonical form that is semantically equivalent to the original.
|
void |
passivateObject(PStmtKey key,
DelegatingPreparedStatement obj)
|
CallableStatement |
prepareCall(String sql)
Create or obtain a
CallableStatement from the pool. |
CallableStatement |
prepareCall(String sql,
int resultSetType,
int resultSetConcurrency)
Create or obtain a
CallableStatement from the pool. |
CallableStatement |
prepareCall(String sql,
int resultSetType,
int resultSetConcurrency,
int resultSetHoldability)
Create or obtain a
CallableStatement from the pool. |
PreparedStatement |
prepareStatement(String sql)
Create or obtain a
PreparedStatement from the pool. |
PreparedStatement |
prepareStatement(String sql,
int autoGeneratedKeys) |
PreparedStatement |
prepareStatement(String sql,
int[] columnIndexes)
Create or obtain a
PreparedStatement from the pool. |
PreparedStatement |
prepareStatement(String sql,
int resultSetType,
int resultSetConcurrency)
Create or obtain a
PreparedStatement from the pool. |
PreparedStatement |
prepareStatement(String sql,
int resultSetType,
int resultSetConcurrency,
int resultSetHoldability)
Create or obtain a
PreparedStatement from the pool. |
PreparedStatement |
prepareStatement(String sql,
String[] columnNames)
Create or obtain a
PreparedStatement from the pool. |
String |
toString()
Returns a string representation of the metadata associated with
the innnermost delegate connection.
|
boolean |
validateObject(PStmtKey key,
DelegatingPreparedStatement obj)
KeyedPoolableObjectFactory method for validating
pooled statements. |
abort, activate, checkOpen, clearWarnings, commit, createArrayOf, createBlob, createClob, createNClob, createSQLXML, createStatement, createStatement, createStatement, createStruct, equals, getAutoCommit, getCatalog, getClientInfo, getClientInfo, getDelegate, getDelegateInternal, getHoldability, getInnermostDelegate, getInnermostDelegateInternal, getMetaData, getNetworkTimeout, getSchema, getTransactionIsolation, getTypeMap, getWarnings, handleException, hashCode, innermostDelegateEquals, isClosed, isReadOnly, isValid, isWrapperFor, nativeSQL, passivate, releaseSavepoint, rollback, rollback, setAutoCommit, setCatalog, setClientInfo, setClientInfo, setDelegate, setHoldability, setNetworkTimeout, setReadOnly, setSavepoint, setSavepoint, setSchema, setTransactionIsolation, setTypeMap, unwrapaddTrace, clearTrace, getConfig, getLastUsed, getTrace, printStackTrace, removeTrace, setLastUsed, setLastUsed, setStackTraceprotected KeyedObjectPool<PStmtKey,DelegatingPreparedStatement> _pstmtPool
PreparedStatements. and CallableStatementspublic PoolingConnection(Connection c)
c - the underlying Connection.public PoolingConnection(Connection c, KeyedObjectPool<PStmtKey,DelegatingPreparedStatement> pool)
c - the underlying Connection.pool - KeyedObjectPool of PreparedStatements and CallableStatements.public void close()
throws SQLException
PreparedStatements or CallableStatement from the pool, and
close the underlying connection.close in interface AutoCloseableclose in interface Connectionclose in class DelegatingConnectionSQLExceptionpublic PreparedStatement prepareStatement(String sql) throws SQLException
PreparedStatement from the pool.prepareStatement in interface ConnectionprepareStatement in class DelegatingConnectionsql - the sql string used to define the PreparedStatementPoolablePreparedStatementSQLExceptionpublic PreparedStatement prepareStatement(String sql, int autoGeneratedKeys) throws SQLException
prepareStatement in interface ConnectionprepareStatement in class DelegatingConnectionSQLExceptionpublic PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency) throws SQLException
PreparedStatement from the pool.prepareStatement in interface ConnectionprepareStatement in class DelegatingConnectionsql - the sql string used to define the PreparedStatementresultSetType - result set typeresultSetConcurrency - result set concurrencyPoolablePreparedStatementSQLExceptionpublic CallableStatement prepareCall(String sql) throws SQLException
CallableStatement from the pool.prepareCall in interface ConnectionprepareCall in class DelegatingConnectionsql - the sql string used to define the CallableStatementPoolableCallableStatementSQLExceptionpublic CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency) throws SQLException
CallableStatement from the pool.prepareCall in interface ConnectionprepareCall in class DelegatingConnectionsql - the sql string used to define the CallableStatementresultSetType - result set typeresultSetConcurrency - result set concurrencyPoolableCallableStatementSQLExceptionpublic PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency, int resultSetHoldability) throws SQLException
PreparedStatement from the pool.prepareStatement in interface ConnectionprepareStatement in class DelegatingConnectionsql - the sql string used to define the PreparedStatementresultSetType - result set typeresultSetConcurrency - result set concurrencyresultSetHoldability - result set holdabilityPoolablePreparedStatementSQLExceptionpublic PreparedStatement prepareStatement(String sql, int[] columnIndexes) throws SQLException
PreparedStatement from the pool.prepareStatement in interface ConnectionprepareStatement in class DelegatingConnectionsql - the sql string used to define the PreparedStatementcolumnIndexes - column indexesPoolablePreparedStatementSQLExceptionpublic PreparedStatement prepareStatement(String sql, String[] columnNames) throws SQLException
PreparedStatement from the pool.prepareStatement in interface ConnectionprepareStatement in class DelegatingConnectionsql - the sql string used to define the PreparedStatementcolumnNames - column namesPoolablePreparedStatementSQLExceptionpublic CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency, int resultSetHoldability) throws SQLException
CallableStatement from the pool.prepareCall in interface ConnectionprepareCall in class DelegatingConnectionsql - the sql string used to define the CallableStatementresultSetType - result set typeresultSetConcurrency - result set concurrencyresultSetHoldability - result set holdabilityPoolableCallableStatementSQLExceptionprotected PStmtKey createKey(String sql)
sql - the sql string used to define the statementprotected PStmtKey createKey(String sql, int resultSetType, int resultSetConcurrency)
sql - the sql string used to define the statementresultSetType - result set typeresultSetConcurrency - result set concurrencyprotected PStmtKey createKey(String sql, int resultSetType, int resultSetConcurrency, int resultSetHoldability)
protected PStmtKey createKey(String sql, int resultSetType, int resultSetConcurrency, int resultSetHoldability, PoolingConnection.StatementType statementType)
protected PStmtKey createKey(String sql, int resultSetType, int resultSetConcurrency, PoolingConnection.StatementType stmtType)
sql - the sql string used to define the statementresultSetType - result set typeresultSetConcurrency - result set concurrencystmtType - statement typeprotected PStmtKey createKey(String sql, PoolingConnection.StatementType stmtType)
sql - the sql string used to define the statementstmtType - statement typeprotected PStmtKey createKey(String sql, String[] columnNames)
sql - the sql string used to define the statementcolumnNames - column namesprotected String normalizeSQL(String sql)
public DelegatingPreparedStatement makeObject(PStmtKey key) throws Exception
KeyedPoolableObjectFactory method for creating
PoolablePreparedStatements or PoolableCallableStatements.
The stmtType field in the key determines whether
a PoolablePreparedStatement or PoolableCallableStatement is created.makeObject in interface KeyedPoolableObjectFactory<PStmtKey,DelegatingPreparedStatement>key - the key for the PreparedStatement to be createdException - if there is a problem creating a new instance,
this will be propagated to the code requesting an object.createKey(String, int, int, StatementType)public void destroyObject(PStmtKey key, DelegatingPreparedStatement obj) throws Exception
KeyedPoolableObjectFactory method for destroying
PoolablePreparedStatements and PoolableCallableStatements.
Closes the underlying statement.destroyObject in interface KeyedPoolableObjectFactory<PStmtKey,DelegatingPreparedStatement>key - ignoredobj - the pooled statement to be destroyed.Exception - should be avoided as it may be swallowed by
the pool implementation.KeyedPoolableObjectFactory.validateObject(K, V),
KeyedObjectPool.invalidateObject(K, V)public boolean validateObject(PStmtKey key, DelegatingPreparedStatement obj)
KeyedPoolableObjectFactory method for validating
pooled statements. Currently always returns true.validateObject in interface KeyedPoolableObjectFactory<PStmtKey,DelegatingPreparedStatement>key - ignoredobj - ignoredtruepublic void activateObject(PStmtKey key, DelegatingPreparedStatement obj) throws Exception
KeyedPoolableObjectFactory method for activating
pooled statements.activateObject in interface KeyedPoolableObjectFactory<PStmtKey,DelegatingPreparedStatement>key - ignoredobj - pooled statement to be activatedException - if there is a problem activating obj,
this exception may be swallowed by the pool.KeyedPoolableObjectFactory.destroyObject(K, V)public void passivateObject(PStmtKey key, DelegatingPreparedStatement obj) throws Exception
KeyedPoolableObjectFactory method for passivating
PreparedStatements or CallableStatements.
Invokes PreparedStatement.clearParameters().passivateObject in interface KeyedPoolableObjectFactory<PStmtKey,DelegatingPreparedStatement>key - ignoredobj - a PreparedStatementException - if there is a problem passivating obj,
this exception may be swallowed by the pool.KeyedPoolableObjectFactory.destroyObject(K, V)public String toString()
DelegatingConnectiontoString in class DelegatingConnectionCopyright © 2000-2020 Apache Software Foundation. All Rights Reserved.