Chat Application | RSD
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This document contains the requirement specification and design for a chat application. It includes use case diagrams and tables describing the authentication system, contacts form, chat form, maintenance, and monitoring features. It also includes activity diagrams, class diagrams, entity relationship diagrams, and sequence diagrams modeling the application's functionality and architecture. The data flow diagrams show the high-level data flows and data transformation processes within the chat application.
Chat Application | RSD
- 1. CHAT APPLICATION Requirement Specification & Design April 11 2017 Members: • Mourin Mondol • 152-35-1298 • Ashiqur Rahman • 152-35-1264 • Rifat Sarker • 152-35-1177 Instructor: Syeda Sumbul Hossain 1
- 2. Contents 1 Introduction 1 2 Requirement specification & design 2 2.1 Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2.2 Use Case Diagram . . . . . . . . . . . . . . . . . . . . . . . . 3 2.2.1 Use Case Table . . . . . . . . . . . . . . . . . . . . . . 3 2.2.2 Authentication System . . . . . . . . . . . . . . . . . . 4 2.2.3 Contacts Form . . . . . . . . . . . . . . . . . . . . . . 5 2.2.4 Chat Form . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.2.5 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . 7 2.2.6 Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.3 Activity Diagram . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.3.1 Authentication System, Maintenance, Monitor . . . . . 9 2.3.2 Contacts Form, Chat Form . . . . . . . . . . . . . . . . 10 2.4 Contacts Form, Chat Form . . . . . . . . . . . . . . . . . . . . 11 2.5 Entity Relationship Diagram . . . . . . . . . . . . . . . . . . . 12 2.6 Sequence Diagram . . . . . . . . . . . . . . . . . . . . . . . . 13 2.7 Data Flow Diagram . . . . . . . . . . . . . . . . . . . . . . . . 20 i
- 3. 1 Introduction Communication is a mean for people to exchange messages. It has started since the beginning of human creation. Distant communication began as early as 1800 century with the introduction of television, telegraph and then telephony. Interestingly enough, telephone communication stands out as the fastest growing technology, from fixed line to mobile wireless, from voice call to data transfer. The emergence of computer network and telecommunication technologies bears the same objective that is to allow people to communicate. All this while, much efforts has been drawn towards consolidating the device into one and therefore indiscriminate the services. Chatting is a method of using technology to bring people and ideas together despite of the geograph- ical barriers. The technology has been available for years but the acceptance it was quit recent. Our project is an example of a chat server. It is made up of applications the client application which runs on the users mobile and server application which runs on any pc on the network. To start chatting our client should get connected to server where they can do Group and private chatting. 1
- 4. 2 Requirement specification & design 2.1 Requirements 2
- 5. 2.2 Use Case Diagram 2.2.1 Use Case Table Figure 1: Use Case Table of Chat Application 3
- 6. 2.2.2 Authentication System Figure 2: Use Case Diagram of Authentication System 4
- 7. 2.2.3 Contacts Form Figure 3: Use Case Diagram of Contacts Form 5
- 8. 2.2.4 Chat Form Figure 4: Use Case Diagram of Chat Form 6
- 9. 2.2.5 Maintenance Figure 5: Use Case Diagram of Maintenance 7
- 10. 2.2.6 Monitor Figure 6: Use Case Diagram of Monitor 8
- 11. 2.3 Activity Diagram 2.3.1 Authentication System, Maintenance, Monitor Figure 7: Activity Diagram of Authentication System, Maintenance, Monitor 9
- 12. 2.3.2 Contacts Form, Chat Form Figure 8: Activity Diagram of Contacts Form, Chat Form 10
- 13. 2.4 Contacts Form, Chat Form Figure 9: Class Diagram of Chat Application 11
- 14. 2.5 Entity Relationship Diagram Figure 10: Entity Relationship Diagram of Chat Application 12
- 15. 2.6 Sequence Diagram Figure 11: Sequence Diagram of Registration Functionality 13
- 16. Figure 12: Sequence Diagram of Login Functionality 14
- 17. Figure 13: Sequence Diagram of Add Friend Functionality 15
- 18. Figure 14: Sequence Diagram of Remove Friend Functionality 16
- 19. Figure 15: Sequence Diagram of Block friend Functionality 17
- 20. Figure 16: Sequence Diagram of Send Message Functionality 18
- 21. Figure 17: LSequence Diagram of Delete Message Functionality 19
- 22. Figure 18: Sequence Diagram of Logout Functionality 2.7 Data Flow Diagram Figure 19: Level-0 Data Flow Diagram of Chat Application 20
- 23. Figure 20: Level-1 Data Flow Diagram of Chat Application 21