Component based software engineering

1. By Nadia Nahar
11/18/2014 1

2. • Component Level Design
– Library Circulation System
• Designing Conventional Component
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4. 11/18/2014 4

5. User
user_type
user_name
password
user_status
e-mail
authenticate()
search()
renew()
booking()
Administrator
user_name
password
e-mail
configure()
authenticate()
Librarian
user_name
password
e-mail
issue()
retrieve()
add()
edit()
delete()
Report
report_no
intended_user
date
report_type
notifyUser()
blockUser()
Item
item_type
call_number
item_status
assigned_user
issueItem()
retrieveItem()
itemAvailability()
Fine
fine_type
fine_amount
assigned_user
assigned_item
fine_rate
borrowing_duration
generateReport()
updateUser()
calculateFineAmount()
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7. DAO
insert()
update()
delete()
select()
GUI
menu_items
theme
elements
update()
link()
DB Connect
connectionString
databaseName
databaseUser
Password
databaseType
connect()
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9. issue
retreive
Librarian
user_name
password
e-mail
selectUser()
checkUserStatus()
selectItem()
checkItemStatus()
show()
updateItem()
updateUser()
selectUser()
checkFine()
selectItem()
updateItem()
updateUser()
add()
edit()
delete()
DAIsOsue
selectUser()
checkUserStatus()
selectItem()
checkItemStatus()
show()
updateItem()
updateUser()
DAROetreive
selectUser()
checkFine()
selectItem()
updateItem()
updateUser()
Librarian
user_name
password
e-mail
issue()
retrieve()
add()
edit()
delete()
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10. calculateFine
generateReport
Fine
fine_type
general_fine
special_fine
destruction_fine
fine_amount
assigned_user
General
Special
assigned_item
Available
Unavailable
fine_rate
borrowing_duration
getDuration()
getItemType()
getRate()
calculate()
getNotification()
calculateFineAmount()
getUser()
acquireEmailAddress()
sendNotification()
updateUser()
calcDuAlaOteFine
getDuration()
getItemType()
getRate()
calculate()
DgAeOnerateReport
getNotification()
calculateFineAmount()
getUser()
acquireEmailAddress()
sendNotification()
updateUser()
Fine
fine_type
fine_amount
assigned_user
assigned_item
fine_rate
borrowing_duration
calculateFineAmount()
generateReport()
updateUser()
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12. 1.userDetails :=
selectUser(userName)
2.userStatus :=
checkUserStatus (user)
3.itemDetails :=
selectItem(itemName)
4.itemStatus :=
checkItemStatus (item)
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13. 1.userDetails :=
selectUser(userName)
3.itemDetails :=
selectItem(itemName)
2.Fine := checkFine(User)
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14. 1.duration :=
getDuration(user,item)
3.fineRate :=
getRate(itemType)
2.itemType :=
getItemType(item)
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16. issue
retreive
selectItem
<<interface>>
issue
PassItemtoIssue()
selectUser
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17. issue
retreive
selectItem
<<interface>>
retrieve
PassItemtoRetrieve()
checkFine
selectUser
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18. calculateFine
generateReport
getDuration
<<interface>>
calculateFine
PassUserItemtoCalculateFi
ne()
getItemType
getFineRate
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20. Attribute Name Class Data Type/Data Structure
user_type user enum
user_name user,administrator,librarian string
password user,administrator,librarian string
user_status user enum
e-mail user,administrator,librarian string
report_no report int
intended_user report int
date report date
report_type report enum
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22. Input Item
Validate Input
retrieve
Arrange Alphabetically
Arrange by Arrival Date
Arrange by Category
show
arrangeType=Name
arrangeType=ArrivalDate
arrangeType=Category
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23. Select User
Check User
Availability
active
Select Item
Check Item
Availability
available
blocked
Not available
Update Item,User
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24. Select User
Check Fine
no
Select Item
Update Item
Update User
yes Generate Report
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26. • Date Source
– User Database
– Item Database
• Required Class
– DB Connect
– DAO
DAO
insert()
update()
delete()
select()
DB Connect
connectionString
databaseName
databaseUser
Password
databaseType
connect()
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28. Librarian
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Item

30. Report
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32. Control Panel
Unit
Secure Communication
Central Processor
Library PC http
Database Server
Remote PC
Proxy Web
Server
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34. • Graphical design notation
• Tabular design notation
• Program design language
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35. Select User
Check User
Availability
active
Select Item
Check Item
Availability
available
issue retrieve
Get Selection
blocked
Not available
Update Item,User
Select User
Check Fine
no
Select Item
Update Item
Update User
yes
Generate Report
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36. Rules
Conditions 1 2 3 4
User Status F T F T
Item Status F F T T
Actions
Issue Item 
Don’t Issue   
Rules
Conditions 1 2
Check Fine F T
Actions
Retrieve Item 
Fine Report 
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37. Component Librarian:
The intent of this component is to manage the circulation of items of the library
and also update item data.
Initialize all system ports and reset all hardware
select user(username)
contact with user class and get the details of an user
specified by username
check user_status(user)
if user.status=“blocked”
return “user is blocked”
elseif user.status=“active”
return “user is active”
……………………………………………………………………
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