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--The HostController Class
-----------------------------------------------
-- Author: Sune Wolff - 20022462
-- Created: 20/4 - 2008
-- Updated:
-- Description: HostController is the central server
-----------------------------------------------
--
-- class definition
--
class HostController
--
-- instance variables
--
instance variables
private finished : bool := false;
private print : bool := true;
private TargetTemp : nat;
private Temp : nat := 0;
private TargetHumid : nat;
private Humid : nat := 0;
private NodeList : map nat to NetworkTypes`nodeType := { |-> };
private Algo : algType := <NONE>;
--
-- Types definition section
--
types
public algType = <THTW> | <TTW> | <TT> | <TW> | <HW> | <NONE>;
--
-- Operations definition section
--
operations
public HostController: nat * nat ==> HostController
HostController(t, h) ==
(TargetTemp := t;
TargetHumid := h;
);
public UpdateValues: () ==> ()
UpdateValues() ==
(for all r in set rng NodeList do
(if (r = <HUMIDSENSOR>)
then Humid := HA`HumidNode.ReadValue();
if (r = <TEMPSENSOR>)
then Temp := HA`TempNode.ReadValue();
);
);
public GetAlgo: () ==> algType
GetAlgo() ==
return Algo;
public GetTemp: () ==> nat
GetTemp() ==
return Temp;
public GetHumid: () ==> nat
GetHumid() ==
return Humid;
public Algorithm: () ==> ()
Algorithm() ==
(cases Algo:
<THTW> -> THTWAlgo(),
<TTW> -> TTWAlgo(),
<TT> -> TTAlgo(),
<TW> -> TWAlgo(),
<HW> -> HWAlgo(),
<NONE> -> return
end
);
private THTWAlgo: () ==> ()
THTWAlgo() ==
(if (Humid > TargetHumid)
then (HA`WinNode.SetCorrection(<OPEN>);
HA`ThermNode.SetCorrection(<NONE>);
print := true;
)
elseif (Temp > TargetTemp+1)
then (HA`WinNode.SetCorrection(<CLOSE>);
HA`ThermNode.SetCorrection(<DEC>);
print := true;
)
elseif (Temp < TargetTemp-1)
then (HA`WinNode.SetCorrection(<CLOSE>);
HA`ThermNode.SetCorrection(<INC>);
print := true;
)
else (HA`WinNode.SetCorrection(<CLOSE>);
HA`ThermNode.SetCorrection(<NONE>);
if print
then (TargetReachedPrint(World`timerRef.GetTime());
);
print := false;
);
);
private TTWAlgo: () ==> ()
TTWAlgo() ==
(if (Temp > TargetTemp + 2)
then (HA`WinNode.SetCorrection(<OPEN>);
HA`ThermNode.SetCorrection(<DEC>);
print := true;
)
elseif (Temp > TargetTemp + 1)
then (HA`WinNode.SetCorrection(<CLOSE>);
HA`ThermNode.SetCorrection(<DEC>);
print := true;
)
elseif (Temp < TargetTemp - 1)
then (HA`WinNode.SetCorrection(<CLOSE>);
HA`ThermNode.SetCorrection(<INC>);
print := true;
)
else (HA`WinNode.SetCorrection(<CLOSE>);
HA`ThermNode.SetCorrection(<NONE>);
if print
then (TargetReachedPrint(World`timerRef.GetTime());
);
print := false;
);
);
private TTAlgo: () ==> ()
TTAlgo() ==
(if (Temp > TargetTemp + 1)
then (HA`ThermNode.SetCorrection(<DEC>);
print := true;
)
elseif (Temp < TargetTemp - 1)
then (HA`ThermNode.SetCorrection(<INC>);
print := true;
)
else (HA`ThermNode.SetCorrection(<NONE>);
if print
then (TargetReachedPrint(World`timerRef.GetTime());
);
print := false;
);
);
private TWAlgo: () ==> ()
TWAlgo() ==
(if (Temp > TargetTemp + 1)
then (HA`WinNode.SetCorrection(<OPEN>);
print := true;
)
else (HA`WinNode.SetCorrection(<CLOSE>);
if print
then (TargetReachedPrint(World`timerRef.GetTime());
);
print := false;
);
);
private HWAlgo: () ==> ()
HWAlgo() ==
(if (Humid > TargetHumid)
then (HA`WinNode.SetCorrection(<OPEN>);
print := true;
)
else (HA`WinNode.SetCorrection(<CLOSE>);
if print
then (TargetReachedPrint(World`timerRef.GetTime());
);
print := false;
);
);
private TargetReachedPrint: nat ==> ()
TargetReachedPrint(t) ==
(IO`print("\nTarget values reached");
IO`print("\nAt time: ");
IO`print(t);
);
private UpdateAlgorithm: () ==> ()
UpdateAlgorithm() ==
(if (rng NodeList = {})
then Algo := <NONE>
elseif (rng NodeList = {<TEMPSENSOR>, <HUMIDSENSOR>, <THERMOSTAT>, <WINDOW>})
then Algo := <THTW>
elseif (rng NodeList = {<TEMPSENSOR>, <THERMOSTAT>, <WINDOW>})
then Algo := <TTW>
elseif (rng NodeList = {<TEMPSENSOR>, <THERMOSTAT>})
then Algo := <TT>
elseif (rng NodeList = {<TEMPSENSOR>, <WINDOW>})
then Algo := <TW>
elseif (rng NodeList = {<HUMIDSENSOR>, <WINDOW>})
then Algo := <HW>
else Algo := <NONE>;
);
public AddNode: nat * NetworkTypes`nodeType ==> ()
AddNode(id, type) ==
(NodeList := NodeList ++ {id |-> type};
UpdateAlgorithm();
)
pre id not in set dom NodeList
post card(dom NodeList) = card(dom NodeList~) + 1;
public RemoveNode: nat * NetworkTypes`nodeType ==> ()
RemoveNode(id, type) ==
(if (NodeList(id) = type)
then NodeList := {id} <-: NodeList;
UpdateAlgorithm();
)
pre id in set dom NodeList
post card(dom NodeList) = card(dom NodeList~) - 1;
public Step: () ==> ()
Step() ==
(HA`TempNode.Step();
HA`HumidNode.Step();
UpdateValues();
Algorithm();
HA`WinNode.Step();
HA`ThermNode.Step();
);
end HostController
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