Compiling High-level Access Interfaces for Multi-site Software (CHAIMS)

This page describes what the transportation demo does, as well as how to run it.
 
 

What the transportation demo does

• IO
• responsible for all getting information from the user as well as displaying results to the user
• RouteInfo
• responsible for getting information about routes between 2 points
• Air
• responsible for getting air travel costs between points
• Ground
• responsible for getting ground travel costs between points
• BestRoute
• responsible for calculating the best cost of all possible routes between 2 points

    The demo works in the following way:

1. The megaprogram contacts the RouteInfo module to get the default city pair (source and destination)
2. The megaprogram then sends this to the ask method of the  IO module so the user can specify which 2 cities he is interested int
3. Once this is done, the megaprogram gets the list of possible routes between these cities by using the GetRoutes method of the RouteInfo module
4. Once the megaprogram has gotten the routes, it then gets the possible city pairs between these 2 cities.  These city pairs will be used to calculate the air and ground costs of travel.
5. Now, the megaprogram sends the city pair list to the GetTravelCost methods of both the Air and Ground modules in order to get the air and ground costs of travel between all of these city pairs
6. Now, the megaprogram sends these costs along with all the possible routes to the BestRoute module.  This module will compute the best possible route.
7. Finally, the megaprogram takes this best route and outputs it to the user using the IO module.

How to run the transportation demo

•     Set up your environment
• source /db/d8/ftp/www/CHAIMS/Code/Env/chaims.env
•     Start up the IO module (either in a new window or as a background process)
•    change to the IO module directory
• /db/d8/ftp/www/CHAIMS/Code/HelperModules/IOModule/v1.1/java_io
•     start the server (make sure DISPLAY is set to where you are)
• ./s
 
 
    Now you can run the demo:
•     Change to the demo directory
•    /db/d8/ftp/www/CHAIMS/Code/Examples/trans_1.1/Client1
•     Run it
•     ./transdemoclient
    Here is a list of all possible cities that the transportation system knows about:
 
• austin-tx
• baltimore
• houston-tx
• new-york-city
• palo-alto
• san-francisco
• san-jose
• orlando-fl
If you have any questions/problems, feel free to contact me.

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7/17/98

wpollack@db.stanford.edu