1 object-oriented software development project aaron christopher
Post on 19-Dec-2015
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Object-Oriented Software Development Project
Aaron Christopher
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Project Overview
• Kind of like SourceForge• Allow developers to catalog their software,
source code and documentation for use by other developers
• Also provide mechanism for publishing a virtual appliances that run the software on its intended platform.
• Users of the system can connect to the appliances and use the software live in their browser through a client application implemented as an applet.
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Project Breakdown
• The complete system is broken into three subsystems– The Desktop Sharing System– The Server (the scope for today)– The Client
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Some Java Technologies Used by the Server
• Multiple Threads and Synchronization• Blocking TCP/IP Sockets from the java.net
package• Object Streams and Serialization• Embedded Apache Derby Database
– A small footprint open source SQL database– Can be run in embedded mode in java
applications and accessed using JDBC– All database code runs in your process
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Actors Overview
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Top Level Use Case
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Deployment Diagram
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Add New Modules
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End Session
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Facilitate Use Of Live Modules
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File Transfers
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Join Collaborative Session
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List Active Sessions
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Client Log In
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Manage Collaborative Sessions
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Manage Software Modules
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Manage Single User Sessions
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New Collaborative Session
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New Private Collaborative Session
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Client Authentication
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Client Authentication
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Database Interaction
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Direct Session Message
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Client File Download
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Module File Download
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File Transfers
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Join Collaborative Session
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Leave Session
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Module List Request
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Server Overview
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Session Control
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Session List Request
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Start Collaborative Session
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Text Messaging
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Client File Upload
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Message Polymorphism
Client To Server Messages Server To Client Messages
Message Interfaces
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Inheritance Among Session Types
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Singleton Design Pattern
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MVC Pattern
• Model• View• Controller
A simple diagram depicting the relationship between the Model, View, and Controller.
Note: the solid lines indicate a direct association, and the dashed lines indicate an indirect association (e.g., observer pattern).
Source: http://en.wikipedia.org/wiki/Model-view-controller
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Ostermiller Utilities
• http://ostermiller.org/utils/• Circular Byte Buffer for inter-thread
communication (can be bounded or infinite). Beats Java’s Piped IO Streams by far!
• More Intuitive String Tokenizer– Java (java.util.StringTokenizer)
• A,B,,D tokenizes to “A”,”B”,”D” (3 tokens ignoring the missing string)
– Ostermiller (com.Ostermiller.util.StringTokenizer)• A,B,,D tokenizes to “A”,”B”,””,”D” (4 tokens including an
empty string)