%0 Journal Article %A Cosmin Rablou %D 2012 %J International Journal of Computer and Information Engineering %B World Academy of Science, Engineering and Technology %I Open Science Index 65, 2012 %T Concurrent Access to Complex Entities %U https://publications.waset.org/pdf/9744 %V 65 %X In this paper we present a way of controlling the concurrent access to data in a distributed application using the Pessimistic Offline Lock design pattern. In our case, the application processes a complex entity, which contains in a hierarchical structure different other entities (objects). It will be shown how the complex entity and the contained entities must be locked in order to control the concurrent access to data. %P 549 - 553