Entities or other components on the system can publish conditions that they deem interesting to a HAM, and the HAM can in turn deliver these to other components in the system that have expressed interest and subscribed to them. This allows arbitrary system components that are capable of detecting error conditions or potentially erroneous conditions, to report these to the HAM, which in turn can notify other components to start corrective procedures and/or take preventive action.
There are currently two different ways of publishing information to a HAM. Both of these are designed to be general enough to permit clients to build more complex information exchange mechanisms using them.