Java Doc for StandardConnectionHandle.java in  » Database-JDBC-Connection-Pool » xapool » org » enhydra » jdbc » standard » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database JDBC Connection Pool » xapool » org.enhydra.jdbc.standard   Source Cross Reference   Class Diagram   Java Document (Java Doc)   org.enhydra.jdbc.core.CoreConnection    org.enhydra.jdbc.standard.StandardConnectionHandle All known Subclasses:   org.enhydra.jdbc.sybase.SybaseConnectionHandle,  org.enhydra.jdbc.standard.StandardXAConnectionHandle,  org.enhydra.jdbc.informix.InformixConnectionHandle, StandardConnectionHandle public class StandardConnectionHandle extends CoreConnection (Code) 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 public  Hashtable inUse      public  boolean isReallyUsed      protected  Hashtable masterPrepStmtCache       StandardPooledConnection pooledCon      protected  LRUCache preparedStatementCache       int preparedStmtCacheSize      Constructor Summary public   StandardConnectionHandle(StandardPooledConnection pooledCon, Hashtable preparedStatementCache, int preparedStmtCacheSize)      Constructor. Method Summary public  void catchInvoke(SQLException e)      synchronized  PreparedStatement checkPreparedCache(String sql, int type, int concurrency, int holdability)      Checks to see if a prepared statement with the same concurrency has already been created. synchronized  PreparedStatement checkPreparedCache(String sql, int autogeneratedkeys)      public synchronized  void close()      Closes this StandardConnectionHandle and prevents it from being reused. protected  PreparedStatement createPreparedStatement(String sql, int type, int concurrency, int holdability)      protected  PreparedStatement createPreparedStatement(String sql, int autogeneratedkeys)      public  Statement createStatement()      public  Statement createStatementWrapper()      public  boolean isClosed()      public  void preInvoke()      public  CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency)      public  PreparedStatement prepareStatement(String sql)      Creates a PreparedStatement for the given SQL. public  PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency)      Creates a PreparedStatement for the given SQL, type and concurrency. public  PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency, int resultSetHoldability)       void returnToCache(Object key, Connection theCon)      Removes a prepared statement from the inUse list and returns it to the cache.  void returnToCache(Object key)      protected  void setupPreparedStatementCache()      Field Detail inUse public Hashtable inUse(Code) isReallyUsed public boolean isReallyUsed(Code) masterPrepStmtCache protected Hashtable masterPrepStmtCache(Code) pooledCon StandardPooledConnection pooledCon(Code) preparedStatementCache protected LRUCache preparedStatementCache(Code) preparedStmtCacheSize int preparedStmtCacheSize(Code) Constructor Detail StandardConnectionHandle public StandardConnectionHandle(StandardPooledConnection pooledCon, Hashtable preparedStatementCache, int preparedStmtCacheSize)(Code) Constructor. Method Detail catchInvoke public void catchInvoke(SQLException e) throws SQLException(Code) Exception management : catch or throw the exception checkPreparedCache synchronized PreparedStatement checkPreparedCache(String sql, int type, int concurrency, int holdability) throws SQLException(Code) Checks to see if a prepared statement with the same concurrency has already been created. If not, then a new prepared statement is created and added to the cache. If a prepared statement is found in the cache then it is removed from the cache and placed on the "inUse" list. This ensures that if multiple threads use the same StandardConnectionHandle, or a single thread does multiple prepares using the same SQL, then DIFFERENT prepared statements will be returned. checkPreparedCache synchronized PreparedStatement checkPreparedCache(String sql, int autogeneratedkeys) throws SQLException(Code) close public synchronized void close() throws SQLException(Code) Closes this StandardConnectionHandle and prevents it from being reused. It also returns used PreparedStatements to the PreparedStatement cache and notifies all listeners. createPreparedStatement protected PreparedStatement createPreparedStatement(String sql, int type, int concurrency, int holdability) throws SQLException(Code) createPreparedStatement protected PreparedStatement createPreparedStatement(String sql, int autogeneratedkeys) throws SQLException(Code) createStatement public Statement createStatement() throws SQLException(Code) createStatementWrapper public Statement createStatementWrapper() throws SQLException(Code) isClosed public boolean isClosed() throws SQLException(Code) preInvoke public void preInvoke() throws SQLException(Code) Pre-invokation of the delegation, in case of connection is closed, we throw an exception prepareCall public CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency) throws SQLException(Code) prepareStatement public PreparedStatement prepareStatement(String sql) throws SQLException(Code) Creates a PreparedStatement for the given SQL. If possible, the statement is fetched from the cache. prepareStatement public PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency) throws SQLException(Code) Creates a PreparedStatement for the given SQL, type and concurrency. If possible, the statement is fetched from the cache. prepareStatement public PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency, int resultSetHoldability) throws SQLException(Code) returnToCache void returnToCache(Object key, Connection theCon)(Code) Removes a prepared statement from the inUse list and returns it to the cache. returnToCache void returnToCache(Object key)(Code) setupPreparedStatementCache protected void setupPreparedStatementCache()(Code) Fields inherited from org.enhydra.jdbc.core.CoreConnection public Connection con(Code)(Java Doc) Methods inherited from org.enhydra.jdbc.core.CoreConnection abstract public void catchInvoke(SQLException e) throws SQLException(Code)(Java Doc) public void clearWarnings() throws SQLException(Code)(Java Doc) public void close() throws SQLException(Code)(Java Doc) public void commit() throws SQLException(Code)(Java Doc) public Statement createStatement() throws SQLException(Code)(Java Doc) public Statement createStatement(int resultSetType, int resultSetConcurrency) throws SQLException(Code)(Java Doc) public Statement createStatement(int resultSetType, int resultSetConcurrency, int resultSetHoldability) throws SQLException(Code)(Java Doc) public boolean getAutoCommit() throws SQLException(Code)(Java Doc) public String getCatalog() throws SQLException(Code)(Java Doc) public int getHoldability() throws SQLException(Code)(Java Doc) public DatabaseMetaData getMetaData() throws SQLException(Code)(Java Doc) public int getTransactionIsolation() throws SQLException(Code)(Java Doc) public Map getTypeMap() throws SQLException(Code)(Java Doc) public SQLWarning getWarnings() throws SQLException(Code)(Java Doc) public boolean isClosed() throws SQLException(Code)(Java Doc) public boolean isReadOnly() throws SQLException(Code)(Java Doc) public String nativeSQL(String sql) throws SQLException(Code)(Java Doc) abstract public void preInvoke() throws SQLException(Code)(Java Doc) public CallableStatement prepareCall(String sql) throws SQLException(Code)(Java Doc) public CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency, int resultSetHoldability) throws SQLException(Code)(Java Doc) public PreparedStatement prepareStatement(String sql) throws SQLException(Code)(Java Doc) public PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency) throws SQLException(Code)(Java Doc) public PreparedStatement prepareStatement(String sql, int autoGeneratedKeys) throws SQLException(Code)(Java Doc) public PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency, int resultSetHoldability) throws SQLException(Code)(Java Doc) public PreparedStatement prepareStatement(String sql, int[] columnIndexes) throws SQLException(Code)(Java Doc) public PreparedStatement prepareStatement(String sql, String[] columnNames) throws SQLException(Code)(Java Doc) public void releaseSavepoint(java.sql.Savepoint savepoint) throws SQLException(Code)(Java Doc) public void rollback() throws SQLException(Code)(Java Doc) public void rollback(java.sql.Savepoint savepoint) throws SQLException(Code)(Java Doc) public void setAutoCommit(boolean autoCommit) throws SQLException(Code)(Java Doc) public void setCatalog(String catalog) throws SQLException(Code)(Java Doc) public void setHoldability(int holdability) throws SQLException(Code)(Java Doc) public void setReadOnly(boolean readOnly) throws SQLException(Code)(Java Doc) public java.sql.Savepoint setSavepoint() throws SQLException(Code)(Java Doc) public java.sql.Savepoint setSavepoint(String name) throws SQLException(Code)(Java Doc) public void setTransactionIsolation(int level) throws SQLException(Code)(Java Doc) public void setTypeMap(Map map) throws SQLException(Code)(Java Doc)