1. Model-Driven Development
Breaking the Time Barrier:
The Temporal Engineering of Software
• Calculator example
• Keep it simple
a book by • Select one or more views
Gordon E Morrison
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Choose a View COSA Calc Diagram
Diagram Application Logic
Model
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2. Calculator Engine The Logic
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Create Steps / Behaviors in Model Everything in Sync
Application Dynamic Model
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2
3. Application, Model, Logic Enter Operand (-3.14159)
Control-Flow Logic
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True Behavior
False Behavior
One Period
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4. Until Not a Number
Fractional
Part
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5. Enter Operation (‘-’)
Trace
Trace
Count Step Trace Eng Static Dynam
ic Behaior
v Value
1 +T 0;
= 100 Off; 44; 44; Negae;
t N=-
2 +T 1;
= 101 Off; 1; 1; Any_Number N=-3
3 Ğ 1;
F= 101 On; 1; 59; Ignore; N=
4 +T 2;
= 102 Off; 59; 59; One_Perio
d; N=-3.
5 +T 3;
= 103 Off; 1; 1; Any_Number N=-3.1
6 +T 3;
= 103 Off; 1; 1; Any_Number N=-3.14
7 +T 3;
= 103 Off; 1; 1; Any_Number N=-3.141
8
9
+T 3;
=
+T 3;
=
103
103
Off; 1;
Off; 1;
1;
1;
Any_Number
Any_Number
N=-3.1415
N=-3.14159
Operators
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6. Trace
Subtract
10 Ğ 3;
F= 103 On; 1; 44; Ignore; N=
11 Ğ 4;
F= 104 On; 12; 44; Ignore; N=
12 Ğ 5;
F= 105 On; 11; 44; Ignore; N=
13 Ğ 6;
F= 106 On; 1; 44; Push_Disp
; N=
14 Ğ 7;
F= 500 On; 43; 44; Ignore; N=
15 +T 8;
= 501 On; 44; 1; Subtra n;
ctio N=-3.14159
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Enter Operand (-2.14159)
Negate
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Loop
until not
number
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8. www.VSMerlot.com www.VSMerlot.com
Enter ‘=‘
Trace
16 +T 12;
= 700 Off; 1; 1; Engine_Off; N=-3.14159
17 +T 13;
= 701 Off; 44; 44; Negae;
t N=-
18 +T 14;
= 702 Off; 1; 1; Any_Number N=-2
19 Ğ 14;
F= 702 Off; 1; 59; Ignore; N=
20 +T 15;
= 703 Off; 59; 59; One_Perio
d; N=-2.
21 +T 16;
= 704 Off; 1; 1; Any_Number N=-2.1
22
23
+T 16;
=
+T 16;
=
704
704
Off; 1;
Off; 1;
1;
1;
Any_Number
Any_Number
N=-2.14
N=-2.141
‘=‘ Not a
24 +T 16;
= 704 Off; 1; 1; Any_Number N=-2.1415
25 +T 16;
= 704 Off; 1; 1; Any_Number N=-2.14159 Number
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9. Not Clear Entry Not Clear
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Not Percent Equals
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10. Ready for Next Problem Trace - Simple or Robust
• Numbers only
OR
Trace
• Dynamic State
26 Ğ 16 705
F= On; 1; 13; Ignore; N=
• Static State
27 Ğ 18 706
F= On; 12; 13; Ignore; N=
28
29
Ğ 17 707
F=
Ğ 19 900
F=
On;
On;
1;
11;
13;
13;
Save_Disp
Ignore;
; N=
N=
• Engine State
30 +T 20; 901
= Off; 13; 13; Equal
s; N=-1
• Behavior Name
• Etc.
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Trace Can be Inherited Trace Can Be:
• True Trace Definition • False Trace Definition • Enabled • Disabled
– Subordinate Call to True – Subordinate Call to False
Trace Trace – Dynamic bind = – Dynamic bind =
• Subordinate Call to True • Subordinate Call to False call to Trace call to ignore
Trace Trace
– Subordinate Call to True – Subordinate Call to False
Trace Trace
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11. Trace - All that you want Compare
Count Step Trace Eng Static Dynam ic Behavior Value
1 +T= 0; 100 Off; 44; 44; Negate; N= -
2 +T= 1; 101 Off; 1; 1; Any_Number; N= -3
3 ĞF= 1; 101 On; 1; 59; Ignore; N=
4 +T= 2; 102 Off; 59; 59; One_Perio d; N= -3.
5 +T= 3; 103 Off; 1; 1; Any_Number; N= -3.1
6 +T= 3; 103 Off; 1; 1; Any_Number; N= -3.14
7 +T= 3; 103 Off; 1; 1; Any_Number; N= -3.141
8 +T= 3; 103 Off; 1; 1; Any_Number; N= -3.1415
9 +T= 3; 103 Off; 1; 1; Any_Number; N= -3.14159
10 ĞF= 3; 103 On; 1; 44; Ignore; N=
11 ĞF= 4; 104 On; 12; 44; Ignore; N=
12 ĞF= 5; 105 On; 11; 44; Ignore; N=
13 ĞF= 6; 106 On; 1; 44; Push_Disp ; N=
14 ĞF= 7; 500 On; 43; 44; Ignore; N=
15 +T= 8; 501 On; 44; 1; Subtraction; N= -3.14159
16 +T= 12; 700 Off; 1; 1; Engine_Off; N= -3.14159
17 +T= 13; 701 Off; 44; 44; Negate; N= -
18 +T= 14; 702 Off; 1; 1; Any_Number; N= -2
19 ĞF= 14; 702 Off; 1; 59; Ignore; N=
20 +T= 15; 703 Off; 59; 59; One_Perio d; N= -2.
21 +T= 16; 704 Off; 1; 1; Any_Number; N= -2.1
22 +T= 16; 704 Off; 1; 1; Any_Number; N= -2.14
23 +T= 16; 704 Off; 1; 1; Any_Number; N= -2.141
24 +T= 16; 704 Off; 1; 1; Any_Number; N= -2.1415
25 +T= 16; 704 Off; 1; 1; Any_Number; N= -2.14159
26 ĞF= 16; 705 On; 1; 13; Ignore; N=
27 ĞF= 18; 706 On; 12; 13; Ignore; N=
28 ĞF= 17; 707 On; 1; 13; Save_D isp; N=
29 ĞF= 19; 900 On; 11; 13; Ignore; N=
30 +T= 20; 901 Off; 13; 13; Equals; N= -1
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Now with Trace
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