JRun 4 Improves Cluster Features

By Timothy Dyck  |  Posted 2002-07-01 Print this article Print

Macromedia's JRun 4 brings major changes to the Java application server.

Macromedias JRun 4 brings major changes to the Java application server. This version, which started shipping May 13, supports Java 2 Enterprise Edition 1.3 standards, including EJB 2.0 and the built-in message queuing and object/relational mapping the Enterprise JavaBeans standard requires.

JRun 4 has redesigned, more sophisticated load balancing and failover support, including in-memory session state replication to ensure nothing is lost if a server crashes. Macromedia has added these clustering features to the base JRun product, making it perhaps the least expensive clustered Java application server on the market.

Hot-deployment support for all components has been added; it also improves uptime.

JRun 4 has client and server Web services support using Simple Object Access Protocol, an updated Web management console and native support for Flash MX clients (a nice alternative to native Windows or Java client applications).

One new feature in JRun that we havent seen elsewhere is XDoclet integration. XDoclet lets developers specify component deployment settings right in source code as JavaDoc comments, instead of in separate XML files.

The software runs on Windows, Solaris, Linux, HP-UX, AIX and Tru64 Unix. It costs $899 per CPU new or $499 per CPU for those upgrading from JRun 3.x.

Timothy Dyck is a Senior Analyst with eWEEK Labs. He has been testing and reviewing application server, database and middleware products and technologies for eWEEK since 1996. Prior to joining eWEEK, he worked at the LAN and WAN network operations center for a large telecommunications firm, in operating systems and development tools technical marketing for a large software company and in the IT department at a government agency. He has an honors bachelors degree of mathematics in computer science from the University of Waterloo in Waterloo, Ontario, Canada, and a masters of arts degree in journalism from the University of Western Ontario in London, Ontario, Canada.

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