I have an Apache server running on my server. i want that if someone connevts to www.a.com then he shuld be routes to a server say A and if someone connets to the www.b.com then he should be routed to the B server is this possible in Apache. Please tell me how. If some document is there then please send me the doc for the same.
Reading your query i can say that you want have a distributed server. Load balancing can be done using Apache server in combination of tomcat servers. In this case Apache server wll sit on top of multiple instances of tomcat servers, and it will be responsible to route the requests to the tomcat server depending on the configurations you have done.
Go through a link below and you will get a fair bit of idea on what needs to be done.