Actors

An actor-based implementation of a B-Tree index for managing and organizing data.

BTreeIndex is a generic class that supports keys conforming to both Comparable and Codable protocols. It provides thread-safe operations for indexing and retrieving data in a concurrent environment.

An actor responsible for managing indices in a database system.

IndexManager provides functionality to handle the creation, storage, and metrics of indices for efficient data retrieval. It is generic over a Key type that conforms to both IndexKey and Comparable protocols, ensuring that the keys used in the indices are suitable for indexing and comparison.

Properties:

• indices: A dictionary mapping index names (String) to their corresponding BTreeIndex instances, which store the actual index data.
• createdIndexes: A set of index names (String) that have been created, ensuring uniqueness and preventing duplication.
• metrics: A dictionary mapping index names (String) to their associated IndexMetrics, which provide performance and usage statistics for each index.

An actor responsible for managing and processing statistical data within the database. The StatsEngine interacts with the underlying storage engine to perform its operations.

The StorageEngine actor is responsible for managing the core storage functionality of the database. It handles the configuration, partitioning, and management of collections, shards, and indexes.

Properties:

• baseURL: The base URL where the storage engine operates.
• compressionMethod: The method used for compressing stored data.
• fileProtectionType: The type of file protection applied to stored data.
• collectionPartitionKeys: A dictionary mapping collection names to their partition keys.
• activeShardManagers: A dictionary of active shard managers, keyed by collection name.
• indexManagers: A dictionary of index managers, keyed by collection name.
• statsEngine: A lazily initialized instance of StatsEngine for gathering storage statistics.