Team A

1
Team A

• 3PB Project
• Midterm Progress Report

2
Original System Design
3
Current System Design
Server
User Interface
Data Manager
Listener
3PB Computer
Parser
Display
4
User Interface
Server
User Interface
Data Manager
Listener
3PB Computer
Parser
Display
5
User Interface

• Instantiate other classes (eg DataManager,
  Listener)
• Get user authentication -- Listener
• Get stock symbol and time resolution from user
• Send the symbol to Listener to register --gt Real
  Data Service

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User Interface

• Send time resolution to Data Manager --
  DataManager
• Display textual data -- Display
• Display activity (should be done for the first
  iteration, but not yet)
• Display raw TOS data (should be done for the
  first iteration, and it is!)

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Data Manager
Server
User Interface
Data Manager
Listener
3PB Computer
Parser
Display
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Data Flow
User Interface
Parser
time resolution
new TOS
Data Manager
TOS sampled every time resolution
TOS sampled every time resolution
Display
3PB Computer
3PB output (event)
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Data Manager

• Samples incoming TOS in 1-sec interval (using
  sample-and-hold)
• Stores samples
• When sample for the next Time Resolution is
  available, passes it to 3PB Computer
• Pros
• Independent of local system time
• Doesnt need to be in separate thread

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Data Manager

• RecordTOS( newTOS )
• called by Parser
• samples TOS, and store new samples
• when sample available for next Time
  Resolution(s), passes it to 3PBComputer

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Data Manager

• ChangeTimeResolution( newResolutn )
• called by UserInterface
• changes Time Resolution
• starts from first sample and passes sample at
  every new Time Resolution to 3PBComputer

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3PB Computer

• Computes trends and break prices using 3PB method
  from TOS data.
• Passes outputs to a Display.

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3PB Computer

• FirstTOS( tos )
• called by DataManager
• initializes starting price
• NextTos( tos )
• called by DataManager
• uses 3PB method to compute trend and price break
• if has output, generates event for Display

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Server/Listener
Server
User Interface
Data Manager
Listener
3PB Computer
Parser
Display
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Server

• Sends TOS data every 2 seconds
• Threaded
• One thread sends data
• One thread listens to the client
• Allows stock symbol and price to change

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Listener

• Threaded in a similar fashion.
• Functions
• Opening and closing a server connection
• Stores username/password
• Sends stock/price changes to server
• Sends server data to a Parser

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Parser

• Packages server data into a TOS object
• Implementing the Adapter Design Pattern via Java
  Interfaces
• Sends data to DataManager

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Overview of Demo

• Dummy data server starts
• UserInterface gets user ID, password, stock
  symbol and initial time resolution
• Data server sends TOS every 2 seconds
• Listener gets raw stream and displays it
• ThreePBComputer computes and displays results

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What Well Do Next

• Allow user to change stock symbol
• Display trend information
• Indicate Fibonnaci points
• Connect to Real Data Service
• Indicator to show program running
• Codify Coding Conventions
• Organize CVS repository

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Pros of XP

• Discovering design problems earlier
• Easier debugging
• Larger skill set
• Problems can be solved in parallel
• No marathons You are forced to walk away from
  the code

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Cons of XP

• Inter-pair Communication
• No detailed overall design
• Scheduling
• Cant always work when the mood strikes