Enabling Fast Connection Failover (FCF) for Universal Connection Pool and Oracle WebLogic Server Active GridLink for Oracle RAC enables the use of FAN HA and load balancing advisory events. For Universal Connection Pool to use FAN, your application can use the JDBC development environment for either JDBC OCI or JDBC Thin clients. The Java Database Connectivity Oracle Call Interface (JDBC/OCI) driver connection pooling functionality is part of the JDBC-thin client. This functionality is provided by the OracleOCIConnectionPool class.
To enable FCF for the JDBC-thin client, call the method setFastConnectionFailoverEnabled(true) of the OracleDataSource class in the oracle.jdbc.pool package before making the first getConnection() request. When you enable FCF for the JDBC-thin client, the failover property applies to every connection in the connection pool. Enabling FCF with JDBC-thin driver or JDBC/OCI clients enables the connection pool to receive and react to all FAN events.
JDBC application developers can programmatically integrate with FAN by using a set of APIs introduced in Oracle Database 11g release 2 (11.2). The Oracle RAC FAN APIs enable application code to receive and respond to FAN event notifications sent by Oracle RAC in the following ways:
Listening for Oracle RAC service down, service up, and node down events
Listening for load balancing advisory events and responding to them
See Also:
Oracle Database JDBC Developer's Guide for more information about using APIs, configuring the JDBC universal connection pool, and Oracle Notification Service
Oracle Database 2 Day + Real Application Clusters Guide for more information about configuring JDBC-thin clients