[GraphHopper] GraphHopper] How to add a variable in a query

[marcosi66 at virgilio.it]

Sorry for the question, I am a beginner to client-server application so I want to modify  graphhopper query adding a variable that is set 0 or 1 by an user's query ,  to explain is simple but to do It for me is something that I don't know how to do it...
I understand that in graphhopper you do a query adding some parameter in an url, 
but I don't understand how you set this parameters or variables and do the query, or  if is possible (how to) to take the paramenter of the client's query and add to graphhoper's query and how to have the query's answer...

I want to modify the query beacuse when an user send me a signal(the variable that he set at 0 or 1) I want to modify a node in my graphhopper.osm (my map) adding a barrier, delete the graphhopper-gh and recalculate the graph and the route.
I have already done the fuction to modify the node,add a barrier and delete the graphhopper-gh folder (they are made in a different java file).... even If I don't know how to lay together all this java file in my graphhopper project.

I wish you have understand what I have wrote :')

   
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