WebLogic Server is the cornerstone application server and Java runtime platform implementing the Java EE specification and Web Services standards. It provides industry-leading performance and scalability through state-of-the-art clustering, built-in software load balancing, server self-monitoring, overload protection, and GridLink for Oracle RAC. WebLogic also offers high availability features like incremental updates (FastSwap), rolling upgrades, automatic service and whole -server migration, and a JTA transaction recovery service, as well as automatic failover within or across data centers. WebLogic Server also features open-source projects such as Spring, Web Services technologies such as JAX-WS and MTOM, and a high performance JMS that preserves message flow and data consistency.