Distributed Computing Paradigms

In message passing data is sent between two processes via send/receive.
In the client-server model the server provides services and waits for clients to connect to it. Clients issue requests. (Web)
- Network services extend the idea by providing location transparency. (Jini).
In peer-to-peer all play equivalent roles (both client and server). (JXTA, Jabber).
In message-oriented middleware an intermediary messaging system handles all messages. It can do so either
- point-to-point using a message repository, or
- with publish-subscribe where receivers subscribe to the type of messages they want.
The remote procedure call (RPC) is a function call that gets executed at some other machine. (DCE RPC, SOAP).
The distributed objects paradigm. (Java RMI, CORBA)
In object spaces the objects are located in a common object space that all can access. (Linda, JavaSpaces part of Jini).
- Groupware and Blackboard applications extend this idea by providing added shared functionality.
The mobile agents idea is to write code that moves from host to host. (Tracy).