Design Patterns Usage in Peer-to-Peer Systems--An Empirical Analysis

In this paper, we present the results of an empirical analysis regarding the application and realization of established design patterns in existing peer-to-peer system implementations. Among the goals of our research were the identification of relevant design patterns that are particularly helpful and well suited for the implementation of peer-to-peer architectures and the discovery of potential shortfalls with respect to the capitalization on design patterns in that domain. We describe which design pattern realizations were encountered in the analyzed system implementations and how frequently they were applied, and finally we draw some conclusions from our findings