Main focus of DeepaMehta 4.0.14 is better Performance, in particular when there is a lot of content in the database. All the changes are behind the scenes. The user will perceive nothing but performance. The original problem background is described in a mailing list posting.
The storage layer of DeepaMehta 4.0.14 is completely rewritten. It features High-speed traversal: a Lucene index for associations significantly speeds up traversal. In particular, highly connected nodes ("supernodes") have no negative impact on traversal speed anymore. Compact architecture: the storage implementation is coded directly to the DeepaMehta Model API. The additional MehtaGraph bridging layer is dropped. Modular storage layer: 3rd-party developers are enabled to implement alternate DeepaMehta storage layers, based on arbitrary databases. A Storage layer implementation is deployed as an OSGi service.
For more changes and details see the Release Notes.
After 3 and 1/2 years of work, 7 beta releases, 5 weeks after schedule, at Aug 7, 2020 DMX 5.0 has finally arrived.
The focus of this final milestone was on improving the DMX development experience. The APIs are consolidated, and a DMX Developer Guide is available, as well as API docs. There are minor Webclient UI improvements and crucial bug fixes as well. For more information and download link see this forum posting.
Note: since version 5 DeepaMehta is called "DMX".
DMX 5.0-beta-4 is released at July 22, 2019. Two and a half years in the making of DMX (formerly "DeepaMehta 5") this is the first release that provides Data Guarantee. That is when you install a newer version in the future (beta-5, …) your content will be migrated automatically. Start with DMX 5.0-beta-4 today and your content will be safe. Further highlight features and improvements of this release include Pinnable Detail Panel, up to 10 times faster topicmap rendering performance, improved interaction with topic/association details, and improved handling of HTML links. For more information and download link see this forum posting.
