/// <summary>
/// Turn the given snapshot definition into an unique filename
/// </summary>
/// <param name="snapshot">
/// The snapshot definition to be saved or read
/// </param>
/// <remarks>
/// The filename is the sequence number with the rest of the snapshot definition
/// going into the folder path
/// </remarks>
public static string MakeSnapshotFilename(ISnapshot snapshot)
{
if (snapshot != null)
{
return(BlobEventStreamBase.MakeValidStorageFolderName($"{snapshot.CurrentSequenceNumber}"));
}
return(string.Empty);
}
/// <summary>
/// Make a folder path in which a snapshot for a projection can be saved
/// </summary>
/// <param name="snapshot"></param>
/// <returns></returns>
public static string MakeSnapshotFolder(ISnapshot snapshot)
{
if (snapshot != null)
{
return(BlobEventStreamBase.MakeValidStorageFolderName($"{snapshot.DomainName}/{snapshot.EntityTypeName}/{snapshot.InstanceKey}"));
}
return(string.Empty);
}
/// <summary>
/// Turn the identity of an event stream backed entity into the name of a
/// queue down which the notifications about that entity should be posted
/// </summary>
/// <param name="targetEntity">
/// The entity for which a notification has occurred
/// </param>
/// <returns></returns>
public static string MakeQueueName(IEventStreamIdentity targetEntity)
{
if (targetEntity != null)
{
string basename = BlobEventStreamBase.MakeValidStorageFolderName($"{targetEntity.DomainName}-{targetEntity.EntityTypeName}");
// Queues also cannot start with a number
return(basename.TrimStart(new char[] { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9' }));
}
// The target that applies if the entity cannot be identified
return($"unidentified-entities");
}
