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|Stable release||4.0.48 / 24 February 2016|
|Written in||Java and C|
|License||GPLv3 or proprietary|
Resin is a web server and Java application server from Caucho Technology. In addition to Resin (GPL), Resin Pro is available for enterprise and production environments. Resin supports the Java EE standard as well as a mod_php/PHP like engine called Quercus.
Resin Pro includes optimizations such as built-in caching and features such as clustering support, advanced administration, and the health system that includes HTTP session replication, Java Monitoring, distributed cache replication, and JMS queue replication. While Caucho describes these as "features and enhancements commonly needed in a production environment", Resin Open Source is used without these features.
Although a Java-based server, key pieces of Resin's core networking are written in highly optimized C. Caucho states Java is the layer that allows Resin to be "full featured" while C provides the speed. Resin, which was released in 1999, predates Apache Tomcat, and is one of the oldest application servers and web servers.
- Elastic Clustering / Cloud support
- 3rd generation clustering optimized for Virtualization 2.0, EC2 and OpenStack deployments
- Session Replication
- Load balancing
- Distributed Cache
- Class compilation
- JIT Profiling and heap analysis
- No GUI required
- JUnit support
- Web Admin
- DevOps support via CLI and REST control of Resin
- Apache Ant/Maven/Ivy integration
- IDE integration
- Flexible project management
- Server Monitoring
- Deployment / Cloud deployment
- Versioned deployment
- Merge paths
- Troubleshooting aids
- Server health reports, baselining and post mortem reporting
- Java EE Web Profile certified,
- Java CDI
- standard Java dependency injection similar to Guice and Spring, part of Java EE
- Transaction support
- Static files/JSP/Servlet/JSF
- Extensible access logging
- URL rewriting
- Proxy caching (similar to Squid)
- Gzip compression
- Virtual Hosts
- Comet/Server push
- mod-php like support via Quercus
Resin's market share is small in the grand scheme of Java Application Servers, but some high traffic sites use it, such as Toronto Stock Exchange, SalesForce.com, Condé Nast (parent company of Wired, Vogue, GQ), CNET. NetCraft's February 2012 Survey stated Resin grew to 4,700,000 sites; Resin was the only Java-based web server mentioned.
A 2012-page on a Caucho wiki site describes a test procedure with results showing that tested 0k (empty HTML page), 1K, 8K and 64K byte files. At every level Resin matched or exceeded nginx web server performance.
Quercus is a Java-based implementation of the PHP language that is included with Resin. According to a slideshow presented by Emil Ong (from Caucho), to a San Francisco Java Meetup Group in April 2008 pertaining to Resin 3.1, an essential difference in the operation of Quercus between the Resin Open Source and the Resin Professional editions is that in Resin Professional the PHP is compiled to Java bytecode whereas in the open source version PHP is executed by an interpreter.
One license covers all components of the Resin architecture.
Resin is provided in both an open source GPL license and a Pro version with enhancements for enterprises.
Resin Pro is geared towards businesses, governments, and enterprises such as:
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- Governments who need to scale a web application to provide real time data
- Hospitals sharing data to better diagnose patients
These are the areas where the aforementioned Open Source components are not well suited and where Resin Pro has been engineered to include:
- Dynamic Clustering- Locking was replaced with non-locking atomic operations, cleared contention bottlenecks, improved the async/epoll performance, and reduced thread overhead to handle 100,000 requests per second.
- Cloud Support- Elastic cluster members can be added or removed using a single command. Cluster topology, load balancing, caching, messaging and management automatically adapt to dynamic servers.
- Compiled PHP on the JVM- Improves performance, scalability and security of PHP applications by allowing PHP code to directly call Java Objects.
- Security though Open SSL integration- A comprehensive security framework for application authentication, authorization and transport level SSL based security.
- Smart Software Load balancer- Application load is shared among resources automatically to balance them.
- Proxy cache- Faster application performance is possible with Java caching by saving the results of long calculations and reducing database load and application response time.
- "Resin Download". Retrieved 2016-06-01.
- "Caucho Resin is Officially Certified Against the Java EE 6 Web Profile". Infoq.com. Retrieved 2012-10-25.
- "PHP on Java: Best of Both Worlds?". Infoq.com. Retrieved 2012-10-25.
- "About Caucho". Caucho.com. Retrieved 2012-04-01.
- "Paul Cowan Discusses the Resin Application Server and Cloud". Infoq.com. Retrieved 2012-10-25.
- "Caucho: Resin Cloud Support: 3rd generation Clustering For Elastic Cloud Scaling" (PDF). s3.amazonaws.com. Retrieved 2012-10-25.
- "Resin Can Now Act As a Drop-in Replacement for Memcached Solution". Infoq.com. Retrieved 2012-10-25.
- "Caucho Technology » Blog Archive » Resin Pro Health System now and in the future". Blog.caucho.com. 2011-08-26. Retrieved 2012-10-25.
- "Caucho Resin | Java Application Server | Java EE | PaaS Ready » Java EE Web Profile and beyond". Caucho.com. Retrieved 2012-10-25.
- "Caucho Resin | Java Application Server | Java EE | PaaS Ready » Java CDI | Candi". Caucho.com. Retrieved 2012-10-25.
- "Caucho Resin | Java Application Server | Web Server | Java EE Certified | PaaS/Cloud Ready » Resin Web Server". Caucho.com. 2012-02-07. Retrieved 2012-10-25.
- "February 2012 Web Server Survey | Netcraft". News.netcraft.com. 2012-02-07. Retrieved 2012-10-25.
- "NginX 1.2.0 versus Resin 4.0.29 performance tests". Caucho.com. Retrieved 2012-04-01.
- Emil Ong (2008-04-09), Getting Started With Quercus (PDF), Caucho Technology, retrieved 2009-08-19 (accompanying Caucho blog entry,additional copy of PDF)
- "Powered by Google Docs" (PDF). Docs.google.com. Retrieved 2012-10-25.
- New Monthly Caucho Newsletter, Caucho Technology, 2008-02-26, retrieved 2013-02-27,
I think we’re finally getting to the point where we mimic the other implementation of PHP quite precisely (except we have distributed sessions, are faster in compiled mode, etc. :-)).