You have your Play! application deployed on production. It is a real success and you have loads of users. You are really happy, and because Play! is quite fast you do not have any performance issues yet :) However, you are receiving feature requests. Being agile developers, you implement them quickly, test them in acceptance and you are ready to let your users enjoy them. But, your web applications is so successful that you do not really want to plan any downtime…

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• web applications
• playframework