ECharts for SIP servlets: a state-machine programming environment for VoIP applications
Proceedings of the 1st international conference on Principles, systems and applications of IP telecommunications
On Mechanisms for Deadlock Avoidance in SIP Servlet Containers
Principles, Systems and Applications of IP Telecommunications. Services and Security for Next Generation Networks
A thread synchronization model for SIP servlet containers
Proceedings of the 3rd International Conference on Principles, Systems and Applications of IP Telecommunications
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VoIP services are increasingly expected to support complex interactions among many autonomous users. A conferencing service, for example, must allow dial-in users to freely join and leave a call, and permit an administrator to control who may join a call and kick out participants who should be (temporarily or permanently) excluded. The need to maintain application state complicates development of VoIP applications on top of SIP [3], even in the case of single-user applications. For multi-user applications, the need to synchronize SIP threads that concurrently access shared application state when responding to messages from different users significantly increases this complexity [2].