One user in the community is using the GraphML Topology and asked me in chat if it were possible to add tooltips to a vertex from within a groovy script. Short answer: Yes Long answer By default, setting the tooltip is supposed to work only by setting it directly in the graphml file itself. The official documentation for this says, that the name of the attribute is tooltipText. So if you are looking for static tooltips, that is the way to go.

With the new POC implementation we could solve the current problems of the Topology in OpenNMS. The next step is to take what was learned and implement something similar and more robust in OpenNMS. As this is a big chunk to swallow, the main issue here is on how to split the work into small pieces, as with this kind of API you basically have to almost implement everything before it can be used.

The Topology Map in OpenNMS has some architectural problems. Mainly that there is no "service layer" implemented, which causes mostly performance issues. Besides this no API or persistence model is enforced. This prevents easy integration with 3rd party applications or even provide a new UI implementation. Therefore I started playing around with a new Topology implementation (See issue HZN-1452) for more details). In order to not confuse it with existing implementations, it is called Graph Service or Graph Engine here.