Interface StatementEventListener
- All Superinterfaces:
EventListener
The JDBC 3.0 specification added the maxStatements
ConnectionPooledDataSource
property to provide a standard mechanism for
enabling the pooling of PreparedStatements
and to specify the size of the statement
pool. However, there was no way for a driver to notify an external
statement pool when a PreparedStatement
becomes invalid. For some databases, a
statement becomes invalid if a DDL operation is performed that affects the
table. For example an application may create a temporary table to do some work
on the table and then destroy it. It may later recreate the same table when
it is needed again. Some databases will invalidate any prepared statements
that reference the temporary table when the table is dropped.
Similar to the methods defined in the ConnectionEventListener
interface,
the driver will call the StatementEventListener.statementErrorOccurred
method prior to throwing any exceptions when it detects a statement is invalid.
The driver will also call the StatementEventListener.statementClosed
method when a PreparedStatement
is closed.
Methods which allow a component to register a StatementEventListener with a
PooledConnection
have been added to the PooledConnection
interface.
- Since:
- 1.6
-
Method Summary
Modifier and TypeMethodDescriptionvoid
statementClosed
(StatementEvent event) The driver calls this method on allStatementEventListener
s registered on the connection when it detects that aPreparedStatement
is closed.void
The driver calls this method on allStatementEventListener
s registered on the connection when it detects that aPreparedStatement
is invalid.
-
Method Details
-
statementClosed
The driver calls this method on allStatementEventListener
s registered on the connection when it detects that aPreparedStatement
is closed.- Parameters:
event
- an event object describing the source of the event and that thePreparedStatement
was closed.- Since:
- 1.6
-
statementErrorOccurred
The driver calls this method on allStatementEventListener
s registered on the connection when it detects that aPreparedStatement
is invalid. The driver calls this method just before it throws theSQLException
, contained in the given event, to the application.- Parameters:
event
- an event object describing the source of the event, the statement that is invalid and the exception the driver is about to throw. The source of the event is thePooledConnection
which the invalidPreparedStatement
is associated with.- Since:
- 1.6
-