Resin and the GPL

The rather excellent Java application server, Caucho Resin, was quietly open-sourced recently, so that it’s now licensed under the GPL.

For years, Resin has been the equivalent – both functionally and in terms of its target market – to Apache’s open-source Java servlet/JSP engine, Tomcat. However, Resin has always had the edge in terms of performance and ease of use. Being a commercial product, Resin has also been the proprietary alternative, hence hasn’t quite reached the same level of popularity as Tomcat (Tomcat also being the official servlet/JSP reference implementation endorsed by Sun) – this despite some quite liberal licensing terms.

So the move to make Resin open-source is more significant than it may seem at first. The odd thing is, Caucho really sort of slipped this one through very discreetly with the release of 3.0.9; all very hush-hush for such a major thing, without any big announcements. Is this what they really mean by stealth marketing..?

Being a commercially driven company, Caucho still offers a “souped-up” version of Resin, Resin Professional. There’s some interesting speculation about the differences between the two versions here.

About the Author

Matt Stephens is a senior architect, programmer and project leader based in Central London. He co-wrote Agile Development with ICONIX Process, Extreme Programming Refactored, and Use Case Driven Object Modeling with UML - Theory and Practice.

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