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    <p>There are many issues with rolling your own license management software. If you lock to hardware, what happens when a server goes out and your customer wants to migrate to a new machine? Do you support hot standby? Do you support virtualization? Is it licensed per CPU or per instance? These are just a few sample questions that come into play; there are many, many more to consider.</p> <p>Several years ago, I worked on a server system where we were required to implement license management and enforcement. We used FlexLM from Macrovision. It appears that it is now rolled into a new company and product suite as <a href="http://www.flexerasoftware.com/products/flexnet-producer-suite-software-vendors.htm" rel="nofollow">FlexNet</a>. It was pricey but much better thought out for license management than a hand rolled solution, and, it can span pretty much any server licensing needs.</p> <p>That said, I very much suggest that you do not approach license compliance in this way. Your customers are not likely to respond well to it, not because they want to cheat you on lincensing but because you are adding extra steps, however minor, to the use of the software that they are licensing. In my experience, much better solutions include simply trusting your customers to abide by the license agreement (as a jboss app I'm assuming you are dealing with corporate customers rather than a more easily "shared" consumer desktop app), include rights to audit via the license agreement, or setup the license so your customer can install at will and pay for licenses in use at specified periods. Your account managers should love having a touch point to ask about new licenses. In my experience with server software, when you make it easy for enterprise customers to expand use of your software, they tend to do so resulting in net positive sales.</p> <p>Whichever way you go, good luck!</p>
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    1. CO+1 I've never seen or heard of a situation where DRM didn't do more harm than good. The pirates will just download a cracked version; by the time they see the product the DRM is already gone. DRM just serves to piss off your good paying customers. A simple key scheme to enforce things like license expiration is about as far as I'd go.
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    2. CO+50 Some very good points!
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