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

Implementation of the Transportation example in CORBA (orbix)

The CORBA implementation of the Transportation example can be found in:

/db/d8/ftp/www/CHAIMS/Old_July_98/CORBA/Transportation/*

As the C++ version it consists of 5 Megamodules:

io: handles input and output
routeinfo: it has two functions

it looks up all possible routes from a file called routes. A list of routes does not contain any information about the transportation type (air or ground). The result is of the following type:
san-fransisco,san-jose,new-york
it splits a given list of routes into a list of unique city pairs. For the example above it would be:
san-fransisco,san-jose
san-jose,new-york

air: looks up the air ost for city pairs

it takes a list of city pairs and looks up the cost for each connection in a file called airRoutes. The output is a list of city pairs where the cost to take a plane for this connection is attached after the pair.

ground: looks up the ground cost for city pairs (see air)
bestroute: finds out which the best route is regarding the costs from air and ground

it takes the route information from routeinfo and the cost information from air and ground to compute the best route.

Every module is implemented as a different server. The servers are registered under the following names to the orbix demon:

ioMegamodule for io
RouteinfoMM for routeinfo
AirMM for air
GroundMM for ground
BestrouteMM for bestroute

There exists a small client for every module, in order to make testing simpler. In order to solve the transportation problem you have to run all servers. A client called allClient does this. It does the same job than the megaprogram in the C++ implementation.

In order to run it you have to be on whale and you have to set some environment variables:

setenv LD_LIBRARY_PATH/local/orbix/lib
setenv MANPATH/local/orbix/man
setenv PATH/local/orbix/bin:$PATH

Then you can run it by just typing: allClient

The two cities between the route is computed is hard coded for now.

3/27/97 Meikel Poess