org.enhydra.jdbc.standard

Class StandardConnectionHandle

java.lang.Object

org.enhydra.jdbc.util.JdbcUtil

org.enhydra.jdbc.core.CoreConnection

org.enhydra.jdbc.standard.StandardConnectionHandle

All Implemented Interfaces:

AutoCloseable, Connection, Wrapper

Direct Known Subclasses:

InformixConnectionHandle, StandardXAConnectionHandle, SybaseConnectionHandle

public class StandardConnectionHandle
extends CoreConnection

This is an implementation of java.sql.Connection which simply delegates almost everything to an underlying physical implemention of the same interface. It relies on a StandardPooledConnection to create it and to supply the physical connection and a cache of PreparedStatements. This class will try to re-use PreparedStatements wherever possible and will add to the cache when totally new PreparedStatements get created.

Field Summary

Fields

Modifier and Type	Field and Description
Hashtable	inUse
boolean	isReallyUsed
protected Hashtable	masterPrepStmtCache
protected LRUCache	preparedStatementCache

Fields inherited from class org.enhydra.jdbc.core.CoreConnection

con

Fields inherited from class org.enhydra.jdbc.util.JdbcUtil

log

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
StandardConnectionHandle(StandardPooledConnection pooledCon, Hashtable preparedStatementCache, int preparedStmtCacheSize) Constructor.

Method Summary

Modifier and Type	Method and Description
void	catchInvoke(SQLException e) Exception management : catch or throw the exception
void	close() Closes this StandardConnectionHandle and prevents it from being reused.
protected PreparedStatement	createPreparedStatement(String sql, int autogeneratedkeys)
protected PreparedStatement	createPreparedStatement(String sql, int type, int concurrency, int holdability)
boolean	isClosed()
void	preInvoke() Pre-invokation of the delegation, in case of connection is closed, we throw an exception
CallableStatement	prepareCall(String sql, int resultSetType, int resultSetConcurrency)
PreparedStatement	prepareStatement(String sql) Creates a PreparedStatement for the given SQL.
PreparedStatement	prepareStatement(String sql, int resultSetType, int resultSetConcurrency) Creates a PreparedStatement for the given SQL, type and concurrency.
PreparedStatement	prepareStatement(String sql, int resultSetType, int resultSetConcurrency, int resultSetHoldability)
protected void	setupPreparedStatementCache()

Methods inherited from class org.enhydra.jdbc.core.CoreConnection

abort, clearWarnings, commit, createArrayOf, createBlob, createClob, createNClob, createSQLXML, createStatement, createStatement, createStatement, createStruct, getAutoCommit, getCatalog, getClientInfo, getClientInfo, getHoldability, getMetaData, getNetworkTimeout, getSchema, getTransactionIsolation, getTypeMap, getWarnings, isReadOnly, isValid, isWrapperFor, nativeSQL, prepareCall, prepareCall, prepareStatement, prepareStatement, prepareStatement, releaseSavepoint, rollback, rollback, setAutoCommit, setCatalog, setClientInfo, setClientInfo, setHoldability, setNetworkTimeout, setReadOnly, setSavepoint, setSavepoint, setSchema, setTransactionIsolation, setTypeMap, unwrap

Methods inherited from class org.enhydra.jdbc.util.JdbcUtil

setLogger

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

masterPrepStmtCache

protected Hashtable masterPrepStmtCache

preparedStatementCache

protected LRUCache preparedStatementCache

inUse

public Hashtable inUse

isReallyUsed

public boolean isReallyUsed

Constructor Detail

StandardConnectionHandle

public StandardConnectionHandle(StandardPooledConnection pooledCon,
                                Hashtable preparedStatementCache,
                                int preparedStmtCacheSize)

Constructor.

Method Detail

setupPreparedStatementCache

protected void setupPreparedStatementCache()

preInvoke

public void preInvoke()
               throws SQLException

Pre-invokation of the delegation, in case of connection is closed, we throw an exception

Specified by:

preInvoke in class CoreConnection

Throws:

SQLException

catchInvoke

public void catchInvoke(SQLException e)
                 throws SQLException

Exception management : catch or throw the exception

Specified by:

catchInvoke in class CoreConnection

Throws:

SQLException

close

public void close()
           throws SQLException

Closes this StandardConnectionHandle and prevents it from being reused. It also returns used PreparedStatements to the PreparedStatement cache and notifies all listeners.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Connection

Overrides:

close in class CoreConnection

Throws:

SQLException

createPreparedStatement

protected PreparedStatement createPreparedStatement(String sql,
                                                    int type,
                                                    int concurrency,
                                                    int holdability)
                                             throws SQLException

Throws:

SQLException

createPreparedStatement

protected PreparedStatement createPreparedStatement(String sql,
                                                    int autogeneratedkeys)
                                             throws SQLException

Throws:

SQLException

prepareStatement

public PreparedStatement prepareStatement(String sql)
                                   throws SQLException

Creates a PreparedStatement for the given SQL. If possible, the statement is fetched from the cache.

Specified by:

prepareStatement in interface Connection

Overrides:

prepareStatement in class CoreConnection

Throws:

SQLException

prepareStatement

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

Creates a PreparedStatement for the given SQL, type and concurrency. If possible, the statement is fetched from the cache.

Specified by:

prepareStatement in interface Connection

Overrides:

prepareStatement in class CoreConnection

Throws:

SQLException

prepareStatement

public PreparedStatement prepareStatement(String sql,
                                          int resultSetType,
                                          int resultSetConcurrency,
                                          int resultSetHoldability)
                                   throws SQLException

Specified by:

prepareStatement in interface Connection

Overrides:

prepareStatement in class CoreConnection

Throws:

SQLException

isClosed

public boolean isClosed()
                 throws SQLException

Specified by:

isClosed in interface Connection

Overrides:

isClosed in class CoreConnection

Throws:

SQLException

prepareCall

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

Specified by:

prepareCall in interface Connection

Overrides:

prepareCall in class CoreConnection

Throws:

SQLException