diff options
Diffstat (limited to 'src/mongo/db/s/database_sharding_state.h')
| -rw-r--r-- | src/mongo/db/s/database_sharding_state.h | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/src/mongo/db/s/database_sharding_state.h b/src/mongo/db/s/database_sharding_state.h index a580e5bf4dc..938431cbf8e 100644 --- a/src/mongo/db/s/database_sharding_state.h +++ b/src/mongo/db/s/database_sharding_state.h @@ -53,12 +53,19 @@ public: */ using DSSLock = ShardingStateLock<DatabaseShardingState>; - static const Database::Decoration<DatabaseShardingState> get; - - DatabaseShardingState(); + DatabaseShardingState(const StringData dbName); ~DatabaseShardingState() = default; /** + * Obtains the sharding state for the specified database. If it does not exist, it will be + * created and will remain in memory until the database is dropped. + * + * Must be called with some lock held on the database being looked up and the returned + * pointer must not be stored. + */ + static DatabaseShardingState* get(OperationContext* opCtx, const StringData dbName); + + /** * Methods to control the databases's critical section. Must be called with the database X lock * held. */ @@ -123,9 +130,11 @@ private: // within. Lock::ResourceMutex _stateChangeMutex{"DatabaseShardingState"}; + const std::string _dbName; + // Modifying the state below requires holding the DBLock in X mode; holding the DBLock in any // mode is acceptable for reading it. (Note: accessing this class at all requires holding the - // DBLock in some mode, since it requires having a pointer to the Database). + // DBLock in some mode). ShardingMigrationCriticalSection _critSec; |