StatementEventListener
public
interface
StatementEventListener
implements
EventListener
| javax.sql.StatementEventListener |
An object that registers to be notified of events that occur on PreparedStatements that are in the Statement pool.
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.
Summary
Public methods | |
|---|---|
abstract
void
|
statementClosed(StatementEvent event)
The driver calls this method on all |
abstract
void
|
statementErrorOccurred(StatementEvent event)
The driver calls this method on all |
Public methods
statementClosed
public abstract void statementClosed (StatementEvent event)
The driver calls this method on all StatementEventListeners registered on the connection when it detects that a
PreparedStatement is closed.
| Parameters | |
|---|---|
event |
StatementEvent: an event object describing the source of
the event and that the PreparedStatement was closed. |
statementErrorOccurred
public abstract void statementErrorOccurred (StatementEvent event)
The driver calls this method on all StatementEventListeners
registered on the connection when it detects that a
PreparedStatement is invalid. The driver calls this method
just before it throws the SQLException,
contained in the given event, to the application.
| Parameters | |
|---|---|
event |
StatementEvent: 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
the PooledConnection which the invalid PreparedStatement
is associated with.
|