EventListener
public interface StatementEventListener extends 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.
Modifier and Type | Method | Description |
---|---|---|
void |
statementClosed |
The driver calls this method on all StatementEventListener s registered on the connection when it detects that a PreparedStatement is closed. |
void |
statementErrorOccurred |
The driver calls this method on all StatementEventListener s registered on the connection when it detects that a PreparedStatement is invalid. |
void statementClosed(StatementEvent event)
StatementEventListener
s registered on the connection when it detects that a PreparedStatement
is closed.event
- an event object describing the source of the event and that the PreparedStatement
was closed.void statementErrorOccurred(StatementEvent event)
StatementEventListener
s 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.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 the PooledConnection
which the invalid PreparedStatement
is associated with.
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https://docs.oracle.com/en/java/javase/21/docs/api/java.sql/javax/sql/StatementEventListener.html