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eShop Product Line Use CaseDocument

Feature Id: 123

Feature Name: eShop Product Line specification


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Contents

1. Introduction..................................................................32. eShop Use Case Model..........................................................42.1 Use Cases...................................................................42.1.1 UC_01 Proceed to purchase.............................................. 42.1.2 UC_02 Search products.................................................. 4

2.2 Aspects.....................................................................52.2.1 ASP01 Buy good......................................................... 52.2.2 ASP02 Buy good with shopping cart...................................... 62.2.3 ASP03 Search products.................................................. 6


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1. Introduction

This document presents an example of the use case model structure proposed

for managing varibilities in requirements documents. The scenarios shownhere, which were also presented at AOSD 09, describe part of thespecifications for an electronic commerce product line.


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2. eShop Use Case Model

The main difference between the current Target use case document and the

proposal discussed here is that the new version of the use case modelrepresents variant behavior in terms of aspects and advices.

2.1 Use Cases

Use cases that allow a customer to search and buy goods. These use casesdescribe the common behavior of the product line.

2.1.1 UC_01 Proceed to purchase

This use case describes the common behavior related to confirming a

purchase.

Setup:

Main FlowSC_01

Description: This behavior corresponds to the last steps required to confirm apurchase.From Step: STARTTo Step: END

Step Id User Action System State System Response1M Fill in the

requestedinformation.

Request the shippingmethod and address.

2M Select one of theavailable ({SM})shipping methods.

Calculate theShipping costs.

3M Confirm thepurchase.

Execute the order andsend a request to theDelivery System, inorder to dispatch theproducts.

@CustomerPreferences

2.1.2 UC_02 Search products

It describes the behavior that allows a customer to search products.


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Setup:

Main FlowSC_01

Description: Search for productsFrom Step: STARTTo Step: END

Step Id User Action System State System Response1M Select the

advanced searchoption.

Request the customerto inform the searchcriteria.

2M Inform the searchcriteria.

Retrieve the productsthat satisfy thesearch criteria. Showa list with thecorresponding

products.@CustomerPreferences

3M Confirm thepurchase.

Execute the order andsend a request to theDelivery System, inorder to dispatch theproducts.@CustomerPreferences

2.2 Aspects

This section contains the aspects that introduce variable behavior to the

product line use cases.

2.2.1ASP01 Buy good

It describes the behavior that allows a customer to buy a single product.

Main Flow

ADV01_1

Description: Buy a specific product

Type: BEFOREPointcut: UC_01#1A

Step Id User Action System State System Response


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1R Select the buyproduct option.

Present the selectedproduct. The user canchange the quantityof items he wants tobuy.

2R Select the

confirm option.

Request payment

information.

2.2.2ASP02 Buy good with shopping cart

It describes the behavior that allows a customer to buy product using ashopping cart.

Main Flow

ADV02_1

Description: Buy products using a shopping cart

Type: BEFOREPointcut: UC_01#1A


1R Select the buyproduct option.

Present the selectedproduct. The user canchange the quantityof items he wants to

buy.2R Select the

confirm option.Request paymentinformation.

2.2.3ASP03 Search products

Register the user preferences, based on her (his) historical data of searchingand purchasing.

Main Flow

ADV03_1

Description: Register user preferences

Type: AFTERPointcut: @CustomerPreferences


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1R - Update the customerpreferences based onthe search results orpurchased items.

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