Summary
In the first major release since becoming a top-level Apache project, the latest Velocity 1.5 version includes enhancements to the Velocity template language, support for new data types, and fixes for security vulnerabilities and bugs.
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The Apache Velocity project released version 1.5 of its open-source Java template library. This is the first major release since Velocity became a top-level Apache project, and is fully backward compatible with earlier Velocity versions.
Major enhancements include:
Improved syntax with new capability for decimal numbers, literal map definitions, multi-line statements, and support for automatic escaping of HTML and other special entities.
New capabilities to aid integration with other applications and web frameworks, including enhanced error reporting, a new logging subsystem, and a switch to unchecked instead of checked exceptions.
Correction of several important scalability problems, including a Least Recently Used (LRU) cache implementation and a fix to a ... race condition that could occur under heavy load conditions.
Almost all known bugs are fixed, including issues with macro recursion, a SQL injection vulnerability, several memory leaks and compile-time incompatibilities with Java 1.5 and 1.6.
How do you think the latest Velocity version compares with other Java template libraries?
Used version 1.4 to develop a standalone document generation engine (with Rtf doc as template, yikes!). It was the only open source solution I could find at the time that could do it without a JEE server. It worked fabulously because the VTL is rich enough that I was able to build a translation utility to convert our simple custom tags into VTL for more complex logic (looping, if/elseif/else) and for very complex stuff I just had the template call into Java code to generate low Rtf code.
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