This is possible, to an extent with ME8.
Using the Servers menu select, select your app server and expand the list box and select the Launch item. From there you can use the Create Launch Configuration button to create a new instance which will appear in the Servers view.
But, unfortunately, this feature is not yet complete with the Tomcat server server as it does not allow you to specify alternate base or home directories for new instances. I don't know about the other app servers, but you could give it a try to see if your app server is fully supported for this feature. |