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package javax.sql;



An object that registers to be notified of events generated by a
PooledConnection object.


The ConnectionEventListener interface is implemented by a
connection pooling component.  A connection pooling component will
usually be provided by a JDBC driver vendor or another system software
vendor.  A JDBC driver notifies a ConnectionEventListener
object when an application is finished using a pooled connection with
which the listener has registered.  The notification
occurs after the application calls the method close on
its representation of a PooledConnection object.  A
ConnectionEventListener is also notified when a
connection error occurs due to the fact that the PooledConnection
is unfit for future use---the server has crashed, for example.
The listener is notified by the JDBC driver just before the driver throws an
SQLException to the application using the
PooledConnection object.

Since:1.4
/**
 * <P>
 * An object that registers to be notified of events generated by a
 * <code>PooledConnection</code> object.
 * <P>
 * The <code>ConnectionEventListener</code> interface is implemented by a
 * connection pooling component.  A connection pooling component will
 * usually be provided by a JDBC driver vendor or another system software
 * vendor.  A JDBC driver notifies a <code>ConnectionEventListener</code>
 * object when an application is finished using a pooled connection with
 * which the listener has registered.  The notification
 * occurs after the application calls the method <code>close</code> on
 * its representation of a <code>PooledConnection</code> object.  A
 * <code>ConnectionEventListener</code> is also notified when a
 * connection error occurs due to the fact that the <code>PooledConnection</code>
 * is unfit for future use---the server has crashed, for example.
 * The listener is notified by the JDBC driver just before the driver throws an
 * <code>SQLException</code> to the application using the
 * <code>PooledConnection</code> object.
 *
 * @since 1.4
 */

public interface ConnectionEventListener extends java.util.EventListener {

  
Notifies this ConnectionEventListener that
the application has called the method close on its
representation of a pooled connection.

Params:
  • event – an event object describing the source of
the event
/**
   * Notifies this <code>ConnectionEventListener</code> that
   * the application has called the method <code>close</code> on its
   * representation of a pooled connection.
   *
   * @param event an event object describing the source of
   * the event
   */
  void connectionClosed(ConnectionEvent event);

  
Notifies this ConnectionEventListener that
a fatal error has occurred and the pooled connection can
no longer be used.  The driver makes this notification just
before it throws the application the SQLException
contained in the given ConnectionEvent object.

Params:
  • event – an event object describing the source of
the event and containing the SQLException that the
driver is about to throw
/**
   * Notifies this <code>ConnectionEventListener</code> that
   * a fatal error has occurred and the pooled connection can
   * no longer be used.  The driver makes this notification just
   * before it throws the application the <code>SQLException</code>
   * contained in the given <code>ConnectionEvent</code> object.
   *
   * @param event an event object describing the source of
   * the event and containing the <code>SQLException</code> that the
   * driver is about to throw
   */
  void connectionErrorOccurred(ConnectionEvent event);

 }