OTF Proof of Concept: CCSDS Mission Operations Alert Services

Conclusions: Use of multiple vendor frameworks within a component creates thread lockups and fragility conflicts over the control of the main thread. Avoid closed vendor messaging frameworks. The MAL layer does isolate the data elements from the messaging framework but application work dispatch is heavily dominated by the framework chosen. API Language is a major factor in implementation. Message APIs with timeouts seem unavoidable in some environments (GUI). Language environment needs to support callbacks (or threads) from the messaging framework to deal with pub/sub management messages and status. Statusing of application communications demand a local broker agent per physical system or else the use of the AMSstyle registrar heartbeat.