Caucho Product Map
Today, I had a call about Quercus and I’ve been working on my presentation for JavaZone and these two things made me realize that we still have some confusion around the various Caucho products and licenses. We’ve got some people working on real literature explaining all of this, but in the meantime, I thought I’d try to clear up some of the confusion with a quick post.
First, some names:
- Caucho is the company behind Resin
- Resin is the Caucho Java application server
- Quercus is Caucho’s implementation of PHP in Java
- Hessian is a serialization protocol
Now some quick facts about Resin:
- Resin Open Source is available for free under the GPL
- Caucho also sells Resin Professional, which includes an number of performance and scalability upgrades
- Portions of Resin Professional are under a closed-source license
…and Quercus:
- Quercus Open Source is available for free under the GPL
- Quercus Open Source is included in Resin Open Source
- Quercus Open Source is also available as a .war file to run on Resin or other Java servers
- Quercus Professional is a version of Quercus which includes performance and scalability upgrades
- Quercus Professional is included with Resin Professional
- Quercus Professional is not available for any application server other than Resin Professional
- Quercus Professional is not available for purchase as a standalone product
- Quercus Professional contains some closed-source licensed code
…and finally, Hessian:
- Hessian is a serialization, web services, and messaging protocol
- Caucho produces implementations of this protocol as libraries for Java and Flash/Flex (AS3/MXML)
- The Hessian library is open source under an Apache license
- The Java Hessian library is not tied to Resin
Caucho also sells multiple levels of support, all of which cover all three products.
Questions welcome. 