JDBC-based middleware applications in instant message systems

Instant message systems adopt a distributed network architecture, which consists of core servers, park servers and terminal users. The servers need to maintain the data consistency and the mutual backup. Firstly, this paper discusses the JDBC fundamental, which includes the JDBC interface technology, the JDBC architecture, the JDBC drivers and the JDBC connection pool. Secondly, it describes the core classes and the JDBC middleware implementation. In order to solve transmission problems among heterogeneous data sources, this paper proposes the operation mode and the construction method of the JDBC-based middleware to access to heterogeneous distributed databases.