Tutorial solutions

[Crista2019]

Description

Offers a potential implementation for the instructions set out in the exercises branch (#6) and addresses #5

in server/DataSource.java

• adds two new web agents /unit/secondAgent and /unit/thirdAgent
• manipulates the data sent to each distinct web agent to make their differences clearer

in server/UnitAgents.java

• creates simple value lanes of type Long to show single statistics
• offers an alternative design choice to send multiple stats to one value lane of type Value

in ui/chart.html, ui/gauge.html, ui/pie.html

• adds a dropdown menu to select the current web agent shown and toggle between all three
• updates the lane downlink and nodeURI whenever the current agent changes
• visually emphasize the differences between agents with a color palette change
• change gauge to draw info from the new stats lane (instead of latest)

Points to be addressed before merge

• [ ] Any style conventions
• [ ] Suggested refactoring/code clarification
• [ ] Places where in-depth comments could be added to explain what is happening on a particular line
• [ ] Missing aspects of swim functionality that would be useful for a user to learn