A Java library for implementing distributed object systems

Most distributed systems are based on either the C/S (Client/Server) model or the P-to-P (Peer to Peer) model. In C/S based distributed systems, a cli ent invokes a server and waits for the server reply. Because of this sequen tial nature, C/S based distributed systems can be implemented by the RPC (R emote Procedure Call) scheme. Most tools for developing distributed objects are based on the RPC scheme. Whereas, in P-to-P based distributed systems, each distributed objects work concurrently, by exchanging asynchronous mes sages, without waiting for the receiver's action. To implement these P-to-P distributed systems, the RPC scheme is not powerful enough, and the active object model using; asynchronous messages is suitable. This paper Explains the pum Java library CAFE for developing P-to-P based distributed active o bject systems.