oracle.ucp
Interface TimeToLiveConnectionTimeoutCallback

public interface TimeToLiveConnectionTimeoutCallback

The callback interface for the time-to-live (TTL) connection timeout feature. This allows applications to provide customized handling for TTL timed-out connections. Also, see the related properties on UniversalConnectionPool and PoolDataSource.

The callback object is optionally registered with each pooled connection or using any of its logical connection proxies, allowing applications to perform customized handling when this particular connection has TTL timed-out.

The handleTimedOutConnection(...) method is invoked when a borrowed connection is found to be TTL timed-out by the Universal Connection Pool. Applications can choose to completely override the pool's handling, invoke additional handling actions, or simply assume the pool's default handling. For example, JDBC applications can invoke cancel(), close(), and rollback() methods on the TTL timed-out connection within this method.

It is an error to register more than 1 TimeToLiveConnectionTimeoutCallbacks on the same connection. Any such attempt will result in a UniversalConnectionPoolException at the pool layer, or an exception specific to the type of a Universal Connection Pool Adapter (e.g., JDBC, JCA, and so forth) like java.sql.SQLException.

See Also:

UniversalConnectionPool, UniversalPooledConnection, PoolDataSource, ConnectionWithTimeToLiveTimeout

Method Summary

boolean

handleTimedOutConnection() Returns whether or not and application handles TTL timeout connections.

Method Detail

handleTimedOutConnection

boolean handleTimedOutConnection()

Returns whether or not and application handles TTL timeout connections.

This method is called by the connection pool on the connection that has TTL timed-out to allow applications to customize the TTL timed-out connection handling.

The method implementation must return true if the application handles the timeToLiveConnectionTimeout in place of the pool and must return false if the application wants the pool to take over the TTL-timeout connection handling. In the former case, applications have the option of simply holding on to the borrowed connection or performing some actions and returning the timed-out connection to the pool. For the pool layer, this means calling returnConnection(); while, for the pool adapter layer, this means calling close() on the connection proxy.

Returns:

If the application's customized handling overrides the pool's actions, return true; otherwise, return false.