Class CharacterFactionService

Namespace

FishMMO.Database.Npgsql.Services

Assembly

FishMMO-DB.dll

Service for managing character factions in the database. Provides async operations for CRUD operations on character faction reputation data. Implements execution strategies for automatic retry on transient database failures. Returns DatabaseResult for consistent, safe error handling.

public sealed class CharacterFactionService : BaseService<CharacterFactionEntity>, ICharacterFactionService, IPersistManyAction<CharacterFactionData>, IDeleteByKeyVersionedAction<long>, IFetchCollectionByKeyAction<long, CharacterFactionData>

Inheritance

object

BaseService<CharacterFactionEntity>

CharacterFactionService

Implements

ICharacterFactionService

IPersistManyAction<CharacterFactionData>

IDeleteByKeyVersionedAction<long>

IFetchCollectionByKeyAction<long, CharacterFactionData>

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.ReferenceEquals(object, object)

object.ToString()

Remarks

This service manages character faction reputation including:

• Batch faction save/update with atomic UPSERT operations
• Faction deletion (bulk operations)
• Faction retrieval

All exceptions are classified by BaseService and mapped to DatabaseResult error codes (e.g., UNIQUE_VIOLATION, FOREIGN_KEY_VIOLATION, STALE_STATE, DATABASE_ERROR). Transient failures are retried automatically. Methods return DatabaseResult to provide structured error handling without throwing exceptions to calling code. Unique constraint violations are not used as normal control flow; write paths prefer deterministic SQL (e.g. UPSERT) where appropriate.

Constructors

CharacterFactionService(INpgsqlDbContextFactory)

Initializes a new instance of the CharacterFactionService class.

public CharacterFactionService(INpgsqlDbContextFactory dbContextFactory)

Parameters

dbContextFactory INpgsqlDbContextFactory

Factory for creating database contexts.

Exceptions

ArgumentNullException

Thrown when dbContextFactory is null.

Methods

DeleteAsync(long, long, CancellationToken)

Deletes the entity identified by the given key if incomingVersion is newer.

public Task<DatabaseResult> DeleteAsync(long characterId, long incomingVersion, CancellationToken cancellationToken = default)

Parameters

characterId long

incomingVersion long

The authoritative, monotonic version for this delete operation.

cancellationToken CancellationToken

Token to cancel the operation.

Returns

Task<DatabaseResult>

FetchAsync(long, CancellationToken)

Fetches a collection of items for the given key.

public Task<DatabaseResult<IReadOnlyList<CharacterFactionData>>> FetchAsync(long characterId, CancellationToken cancellationToken = default)

Parameters

characterId long

cancellationToken CancellationToken

Token to cancel the operation.

Returns

Task<DatabaseResult<IReadOnlyList<CharacterFactionData>>>

PersistAsync(IEnumerable<CharacterFactionData>, CancellationToken)

Persists the provided items.

public Task<DatabaseResult<BulkWriteResult>> PersistAsync(IEnumerable<CharacterFactionData> factions, CancellationToken cancellationToken = default)

Parameters

factions IEnumerable<CharacterFactionData>

cancellationToken CancellationToken

Token to cancel the operation.

Returns

Task<DatabaseResult<BulkWriteResult>>

What the write actually did, or a failure.

Remarks

A successful result does not mean every supplied row was written. Batched writes are version-gated and the service filters what it cannot act on, so the outcome carries counts rather than a bare boolean — see BulkWriteResult, which explains which discrepancies a caller should care about and which are routine.