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d5557ef0e2
The database is low-level service and currently view update generator implicitly depend on it via storage proxy. However, database does need to push view updates with the help of mutate_MV helper, thus adding the dependency loop. This patch exploits the fact that view updates start being pushed late enough, by that time all other service, including proxy and view update generator, seem to be up and running. This allows a "weak dependency" from database to view update generator, like there's one from database to system keyspace already. So in this patch the v.u.g. puts the shared-from-this pointer onto the database at the time it starts. On stop it removes this pointer after database is drained and (hopefully) all view updates are pushed. Signed-off-by: Pavel Emelyanov <xemul@scylladb.com>