BAM/plug-ins in community edition
"Support for business monitoring BAM :Partially supported" is that because it needs third-party software components as I found here in documentation:
https://documentation.bonitasoft.com/bonita/7.11/reporting-overview or there are other constraints?
another question :Bonita supports many connectors ,but does it support plug-ins architecture?
Business monitoring features are for our Subscriptions Editions only. Therefore if you want to monitor business data with Bonita Community Edition, you will need to use connectors and external applications.
Regarding your second question, Bonita as a BPM Platform based on Eclipse enables plug-in architecture. Moreover Bonita (and especially Bonita Enterprise Edition) has event handlers which are plug-ins to handle case management and unstructured data.
Does that answer your question ?