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bbc1260576
This PR addresses parallel resource allocation as a generalization of the problem and solution described in #6644. Instead of the Global lock on the resources a reservation record is created which is added in the resource check count in the ResourceLimitService/ResourceLimitManagerImpl. As a convenience a CheckedReservation is created. This is an implementation of AutoClosable and can be used as a guard in a try-with-resource fashion. The close method of the CheckedReservation wil delete the reservation record. Co-authored-by: Boris Stoyanov - a.k.a Bobby <bss.stoyanov@gmail.com>