Nowadays, context-awarness has been widely accepted as an important requirement to provide appropriate services to users in dynamic environments. In this paper, context can be considered as any information relevant to an entity's situation. In spontaneous networks, the large number of context sources and the heterogeneity of mobile devices have raised new research challenges for supporting context-aware collaborative applications. This paper presents an ongoing work towards P2PCP, a peer-to-peer middleware for on-demand context provisioning based on a component-oriented approach