3 Applications

bla..

3.1 Existing Applicatinos

Here follows a list of precompiled applications

3.2 How to write Applications

This section describes the interface for writing your own applications. The code for an application consists of two parts, a server-part and a client-part. The design of the application interface was to keep it small and clean. We do not force the application programmer to adapt to some to distribution scheme, rather we use the most basic primitives for distribution that the system provides: Tickets.

The MM system provides a way to distributing tickets and starting functors on different sites.

I will show a small program, which demonstrate the interface. This program can be used as a skeleton for your own applications later.

3.3 Server

The server will start in a separate thread

functor 
import 
   Connection
export 
   start:Start
   stop:Stop
define 
   Gate
   proc{Start U Ticket}
      fun{P C} U.name#" say, Hello "#C.name end 
   in 
      Gate={New Connection.gate init(P Ticket)}
   end 
   proc{Stop}
      {Gate close()}
   end 
end

3.4 Client

The MM-client will call application client module with an instaciated ticket Ticket and the name of the person

functor 
import 
   Browser(browse)
   Connection(take)
export 
   start:Start
   stop:Stop
define 
   proc{Start U T}
      S={Connection.take T}
   in 
      {Browser.browse {S U}}
   end 
   proc{Stop}
      skip 
   end 
end

3.5 How to test Applications

Testing is allways necessary:)

Warning:Rewrite the test, using module managers instead...

functor 
import 
   Application
   Server at './server.ozf' 
   Client at './client.ozf' 
define 
   U1=user(name:"Nils Franzen" id:nilsf)
   U2=user(name:"Simon Lindblom" id:simon)
   Ticket
in 
   Ticket={Server.start U1}
   {Client.start U2 Ticket}
    
   {Delay 10000}
 
   {Client.stop}
   {Server.stop}
   {Application.exit 0}
end