Homework Help is Here – Start Your Trial Now!
Engineering
Computer Science
Suppose you are going to design an instant messaging application called Telegraph. Telegraph is modularized application composed of UI module, Chat module, and Contact module. The UI modu uses the Chat module and the Contact module to render the user interface. The Chat module deals wi sending and receiving messages. The Chat module uses the Network module for netwo communication. When users send/receive messages via the network, the Chat module uses the Cryp module to encrypt/decrypt the message. The Contact module manages the contact list. It also uses ti Crypto module for encryption/decryption. The Crypto module uses the Math module for calculation Now we propose a metric to measure the stability of modules. Formally, we define the “stability" of module i as Sį = where dị" (i.e., incoming connection or dependency) is the number d"+a?" modules that directly or indirectly USES module i and d?ut (i.e., outgoing connection dependency) is the number of modules that module i directly or indirectly USES. For example, Figu 2-1 shows module X, that is used by three modules, so d = 3 and dout = 0. Thus, module x shou be unlikely to change because it has three incoming dependencies. Conversely, in Figure 2-2, modu Y uses three modules, i.e., dgut = 3, so it is more likely to change due its three outgoing dependenci.

Suppose you are going to design an instant messaging application called Telegraph. Telegraph is modularized application composed of UI module, Chat module, and Contact module. The UI modu uses the Chat module and the Contact module to render the user interface. The Chat module deals wi sending and receiving messages. The Chat module uses the Network module for netwo communication. When users send/receive messages via the network, the Chat module uses the Cryp module to encrypt/decrypt the message. The Contact module manages the contact list. It also uses ti Crypto module for encryption/decryption. The Crypto module uses the Math module for calculation Now we propose a metric to measure the stability of modules. Formally, we define the “stability" of module i as Sį = where dị" (i.e., incoming connection or dependency) is the number d"+a?" modules that directly or indirectly USES module i and d?ut (i.e., outgoing connection dependency) is the number of modules that module i directly or indirectly USES. For example, Figu 2-1 shows module X, that is used by three modules, so d = 3 and dout = 0. Thus, module x shou be unlikely to change because it has three incoming dependencies. Conversely, in Figure 2-2, modu Y uses three modules, i.e., dgut = 3, so it is more likely to change due its three outgoing dependenci.

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
See similar textbooks
icon
Related questions
Question
Suppose you are going to design an instant messaging application called Telegraph. Telegraph is a modularized application composed of UI module, Chat module, and Contact module. The UI module uses the Chat module and the Contact module to render the user interface. The Chat module deals with sending and receiving messages. The Chat module uses the Network module for network communication. When users send/receive messages via the network, the Chat module uses the Crypto module to encrypt/decrypt the message. The Contact module manages the contact list. It also uses the Crypto module for encryption/decryption. The Crypto module uses the Math module for calculation. Now we propose a metric to measure the stability of modules. Formally, we define the "stability" of a module i as Si = a+dut where di" (i.e., incoming connection or dependency) is the number of modules that directly or indirectly USES module i and d?ut (i.e., outgoing connection or dependency) is the number of modules that module i directly or indirectly USES. For example, Figure 2-1 shows module X, that is used by three modules, so d = 3 and dout = 0. Thus, module x should be unlikely to change because it has three incoming dependencies. Conversely, in Figure 2-2, module Y uses three modules, i.e., dgut = 3, so it is more likely to change due its three outgoing dependencies. If a USES b and b USES c, then din = 2. USES USES USES module X Figure 2-1: Three modules USES module X module Y USES USES USES Figure 2-2: Module Y USES three modules
Transcribed Image Text:Suppose you are going to design an instant messaging application called Telegraph. Telegraph is a modularized application composed of UI module, Chat module, and Contact module. The UI module uses the Chat module and the Contact module to render the user interface. The Chat module deals with sending and receiving messages. The Chat module uses the Network module for network communication. When users send/receive messages via the network, the Chat module uses the Crypto module to encrypt/decrypt the message. The Contact module manages the contact list. It also uses the Crypto module for encryption/decryption. The Crypto module uses the Math module for calculation. Now we propose a metric to measure the stability of modules. Formally, we define the "stability" of a module i as Si = a+dut where di" (i.e., incoming connection or dependency) is the number of modules that directly or indirectly USES module i and d?ut (i.e., outgoing connection or dependency) is the number of modules that module i directly or indirectly USES. For example, Figure 2-1 shows module X, that is used by three modules, so d = 3 and dout = 0. Thus, module x should be unlikely to change because it has three incoming dependencies. Conversely, in Figure 2-2, module Y uses three modules, i.e., dgut = 3, so it is more likely to change due its three outgoing dependencies. If a USES b and b USES c, then din = 2. USES USES USES module X Figure 2-1: Three modules USES module X module Y USES USES USES Figure 2-2: Module Y USES three modules
(2) Draw the IS COMPONENT OF relation and the USES relation among the modules whose names are identified.
Transcribed Image Text:(2) Draw the IS COMPONENT OF relation and the USES relation among the modules whose names are identified.
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps with 1 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Running Time of Application
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.
Recommended textbooks for you
Database System Concepts
Database System Concepts
Computer Science
ISBN:
9780078022159
Author:
Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:
McGraw-Hill Education
Starting Out with Python (4th Edition)
Starting Out with Python (4th Edition)
Computer Science
ISBN:
9780134444321
Author:
Tony Gaddis
Publisher:
PEARSON
Digital Fundamentals (11th Edition)
Digital Fundamentals (11th Edition)
Computer Science
ISBN:
9780132737968
Author:
Thomas L. Floyd
Publisher:
PEARSON
C How to Program (8th Edition)
C How to Program (8th Edition)
Computer Science
ISBN:
9780133976892
Author:
Paul J. Deitel, Harvey Deitel
Publisher:
PEARSON
Database Systems: Design, Implementation, & Manag…
Database Systems: Design, Implementation, & Manag…
Computer Science
ISBN:
9781337627900
Author:
Carlos Coronel, Steven Morris
Publisher:
Cengage Learning
Programmable Logic Controllers
Programmable Logic Controllers
Computer Science
ISBN:
9780073373843
Author:
Frank D. Petruzella
Publisher:
McGraw-Hill Education
SEE MORE TEXTBOOKS