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0b516da95b
This change is preparing ground for state update unification for raft bound subsystems. It introduces schema_applier which in the future will become generic interface for applying mutations in raft. Pulling `database::apply()` out of schema merging code will allow to batch changes to subsystems. Future generic code will first call `prepare()` on all implementations, then single `database::apply()` and then `update()` on all implementations, then on each shard it will call `commit()` for all implementations, without preemption so that the change is observed as atomic across all subsystems, and then `post_commit()`. Backport: no, it's a new feature Fixes: https://github.com/scylladb/scylladb/issues/19649 Closes scylladb/scylladb#20853 * github.com:scylladb/scylladb: storage_service: always wake up load balancer on update tablet metadata db: schema_applier: call destroy also when exception occurs db: replica: simplify seeding ERM during shema change db: remove cleanup from add_column_family db: abort on exception during schema commit phase db: make user defined types changes atomic replica: db: make keyspace schema changes atomic db: atomically apply changes to tables and views replica: make truncate_table_on_all_shards get whole schema from table_shards service: split update_tablet_metadata into two phases service: pull out update_tablet_metadata from migration_listener db: service: add store_service dependency to schema_applier service: simplify load_tablet_metadata and update_tablet_metadata db: don't perform move on tablet_hint reference replica: split add_column_family_and_make_directory into steps replica: db: split drop_table into steps db: don't move map references in merge_tables_and_views() db: introduce commit_on_shard function db: access types during schema merge via special storage replica: make non-preemptive keyspace create/update/delete functions public replica: split update keyspace into two phases replica: split creating keyspace into two functions db: rename create_keyspace_from_schema_partition db: decouple functions and aggregates schema change notification from merging code db: store functions and aggregates change batch in schema_applier db: decouple tables and views schema change notifications from merging code db: store tables and views schema diff in schema_applier db: decouple user type schema change notifications from types merging code service: unify keyspace notification functions arguments db: replica: decouple keyspace schema change notifications to a separate function db: add class encapsulating schema merging