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Make Sequence Diagram draw from Supermarket transaction with Type of Combined Fragments as follow: Operator Purpose alt loop Branches & loops alternative interaction repeated interaction

Make Sequence Diagram draw from Supermarket transaction with Type of Combined Fragments as follow: Operator Purpose alt loop Branches & loops alternative interaction repeated interaction

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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BaL - Alternative (alt) ▪ To model alternative sequences ▪ Guards are used to select the one path to be executed ■ Guards alt [...] [...] I ▪ Modeled in square brackets ▪ default: true ▪ predefined: [else] Multiple operands ▪ Guards had to be disjoint to avoid indeterministic behavior alt :Student opt register(matNo, exam) [status == ok] register: "ok" :StudentAdmin System [status == waiting list free] register: "w" [else] [register on WL == true] register(matNo, exam) register: "ok" register: "error" Database enter(matNo, exam) statusenter: status. enterWL(matNo, exam) enterWL: "ok" BaL- Repeated (loop) ■ To express that a sequence is to be executed repeatedly Exactly one operand Keyword loop followed by the minimal/maximal number of iterations (min..max) or (min, max) default: (*).. no upper limit I I ▪ Guard ■ Evaluated as soon as the minimum number of iterations has taken place ▪ Checked for each iteration within the (min, max) limits If the guard evaluates to false, the execution of the loop is terminated Guard loop is executed at least once, then as long as a<1 is true EXAMPLE DIAGRAM OF COMBINED FRAGMENTS AS REFERENCE TO ANSWER THE QUESTIONS! Max Min. loop(...) [...] loop(1,*) [a<1] K 1 Notation alternatives: loop (3,8)= loop (3..8) loop (8,8) loop (8) loop loop (*) = loop (0,*)
Transcribed Image Text:BaL - Alternative (alt) ▪ To model alternative sequences ▪ Guards are used to select the one path to be executed ■ Guards alt [...] [...] I ▪ Modeled in square brackets ▪ default: true ▪ predefined: [else] Multiple operands ▪ Guards had to be disjoint to avoid indeterministic behavior alt :Student opt register(matNo, exam) [status == ok] register: "ok" :StudentAdmin System [status == waiting list free] register: "w" [else] [register on WL == true] register(matNo, exam) register: "ok" register: "error" Database enter(matNo, exam) statusenter: status. enterWL(matNo, exam) enterWL: "ok" BaL- Repeated (loop) ■ To express that a sequence is to be executed repeatedly Exactly one operand Keyword loop followed by the minimal/maximal number of iterations (min..max) or (min, max) default: (*).. no upper limit I I ▪ Guard ■ Evaluated as soon as the minimum number of iterations has taken place ▪ Checked for each iteration within the (min, max) limits If the guard evaluates to false, the execution of the loop is terminated Guard loop is executed at least once, then as long as a<1 is true EXAMPLE DIAGRAM OF COMBINED FRAGMENTS AS REFERENCE TO ANSWER THE QUESTIONS! Max Min. loop(...) [...] loop(1,*) [a<1] K 1 Notation alternatives: loop (3,8)= loop (3..8) loop (8,8) loop (8) loop loop (*) = loop (0,*)
Make Sequence Diagram draw from Supermarket transaction with Type of Combined Fragments as follow: Operator Purpose alt loop Branches & loops alternative interaction repeated interaction
Transcribed Image Text:Make Sequence Diagram draw from Supermarket transaction with Type of Combined Fragments as follow: Operator Purpose alt loop Branches & loops alternative interaction repeated interaction
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