Robust/src/Benchmarks/Chat/ChatServer.java

   1 task Startup(StartupObject s{initialstate}) {
   2     System.printString("Chat Server Benchmark");
   3     RoomObject ro=new RoomObject() {Initialized};
   4     ServerSocket ss=new ServerSocket(8000);
   5     taskexit(s{!initialstate});
   6 }
   7
   8 task AcceptConnection(ServerSocket ss{SocketPending}) {
   9     ChatSocket cs=new ChatSocket() {Initialized};
  10     ss.accept(cs);
  11     cs.write("Please choose a chatroom".getBytes());
  12 }
  13
  14 task ReadRequest(ChatSocket cs{Initialized && IOPending}) {
  15     if (cs.processRead()) {
  16         taskexit(cs{!Initialized, ProcessRoom});
  17     }
  18 }
  19
  20 task ProcessRoom(ChatSocket cs{ProcessRoom}, RoomObject ro{Initialized}) {
  21     cs.processRoom(ro);
  22     taskexit(cs{!ProcessRoom, InRoom});
  23 }
  24
  25 task Message(ChatSocket cs{InRoom && IOPending}) {
  26     byte buffer[]=new byte[1024];
  27     int length=cs.read(buffer);
  28     String st=(new String(buffer)).subString(0, length);
  29     Message m=new Message(st, cs){};
  30 }
  31
  32 task SendMessage(Message m{!Sent}) {
  33     m.cs.room.sendToRoom(m.cs,m.st.getBytes());
  34     taskexit(m {Sent});
  35 }