/// <summary>
/// Attempts to extract <see cref="ShardId"/> from the entity identifier. This
/// will only work if the shard identifier has been encoded into the entity
/// identifier by an <see cref="IShardEncodingIdentifierGenerator"/>.
/// </summary>
/// <param name="shardedSessionFactory">The sharded session factory to use to retrieve entity metadata.</param>
/// <param name="key">The entity key.</param>
/// <param name="result">Returns the extracted <see cref="ShardId"/> if this operation succeeds.</param>
/// <returns>Returns <c>true</c> if this operation succeeds or false otherwise.</returns>
public static bool TryExtractShardIdFromKey(
this IShardedSessionFactoryImplementor shardedSessionFactory, ShardedEntityKey key, out ShardId result)
{
var sessionFactory = shardedSessionFactory.ControlFactory;
var entityPersister = sessionFactory.GetEntityPersister(key.EntityName);
var rootEntityName = entityPersister.RootEntityName;
var idGenerator = sessionFactory.GetIdentifierGenerator(rootEntityName) as IShardEncodingIdentifierGenerator;
if (idGenerator != null)
{
result = idGenerator.ExtractShardId(key.Id);
return true;
}
result = null;
return false;
}
/// <summary>
/// Attempts to extract <see cref="ShardId"/> from the entity identifier. This
/// will only work if the shard identifier has been encoded into the entity
/// identifier by an <see cref="IShardEncodingIdentifierGenerator"/>.
/// </summary>
/// <param name="shardedSessionFactory">The sharded session factory to use to retrieve entity metadata.</param>
/// <param name="key">The entity key.</param>
/// <param name="result">Returns the extracted <see cref="ShardId"/> if this operation succeeds.</param>
/// <returns>Returns <c>true</c> if this operation succeeds or false otherwise.</returns>
public static bool TryExtractShardIdFromKey(
this IShardedSessionFactoryImplementor shardedSessionFactory, ShardedEntityKey key, out ShardId result)
{
var sessionFactory = shardedSessionFactory.ControlFactory;
var entityPersister = sessionFactory.GetEntityPersister(key.EntityName);
var rootEntityName = entityPersister.RootEntityName;
var idGenerator = sessionFactory.GetIdentifierGenerator(rootEntityName) as IShardEncodingIdentifierGenerator;
if (idGenerator != null)
{
result = idGenerator.ExtractShardId(key.Id);
return(true);
}
result = null;
return(false);
}
public override IEnumerable<ShardId> ResolveShardIds(ShardedEntityKey id)
{
return ShardIds;
}
public abstract IEnumerable<ShardId> ResolveShardIds(ShardedEntityKey id);
