tree f5866b92fd5645f81590cc9ea63dea821405df6a
parent 920879c63252ce78daab0baeef60b2eb25e828c1
author Luca Milanesio <luca.milanesio@gmail.com> 1568902326 +0100
committer Luca Milanesio <luca.milanesio@gmail.com> 1568902719 +0100

DestinationsCollection: synchronize shuttingDown flag

ShuttingDown flag is used to notify all other threads that
the collection of replication destinations is about to be stopped.

For instance, the auto-reload background thread should be informed
to not reload the configuration during shutdowns.
Having the flag as synchronized make sure that the flag is not
read and written concurrently by the shutdown and reload threads.

Change-Id: I6aa0a38d2c79a77befa5fde84da3377a1b0e7e93