For me the most important new feature of the new version is the improved code generation facilities for Giraph. The new wizard will generate a full-fledged Java-project with all needed libraries, set up a Maven build and even automatically install a local Hadoop test environment if you like. This means that you can model a graph transformation in Henshin and fully automatically generate executable Giraph code that you can directly run in Eclipse. The video below shows you a demo of this new code generator.
Henshin 1.2 is available at our release update site.