public void Unlink( MongoReference reference, int count = 1 )
{
if (count == 0)
{
return;
}
var collection = GetCollection( reference );
var result = collection.FindAndModify( new FindAndModifyArgs
{
Query = Query.And( Query.EQ( IdField, reference.Reference ) ),
Update = Update.Inc( CountField, -count ),
Upsert = true
} );
if ( !result.Ok )
{
//TODO : log last error
throw new StorageRequestException();
}
var x = result.ModifiedDocument;
if ( x == null || !x.Contains( CountField ) || x[ CountField ] < 0 )
{
throw new ReferenceOutOfRangeException();
}
}
public void Add( MongoReference reference )
{
foreach ( var item in References )
{
if ( item.MongoReference == reference )
{
item.Count++;
return;
}
}
References.Add(new ReferencePack(reference));
}
public void Link( MongoReference reference, int count = 1 )
{
if (count == 0)
{
return;
}
var collection = GetCollection( reference );
var result = collection.FindAndModify( new FindAndModifyArgs
{
Query = Query.And( Query.EQ( IdField, reference.Reference ) ),
Update = Update.Inc( CountField, count ),
Upsert = true
} );
if ( !result.Ok )
{
throw new StorageRequestException();
}
}
public ReferencePack(MongoReference mongoReference)
{
MongoReference = mongoReference;
Count = 1;
}
public int Count( MongoReference reference )
{
var document = GetCollection( reference ).FindOneByIdAs<BsonDocument>( reference.Reference );
return document == null ? 0 : Convert.ToInt32( document[ CountField ] );
}
private MongoCollection GetCollection( MongoReference reference )
{
return MongoDatabase.GetCollection( GetCollectionName( reference.DatabaseName, reference.CollectionName ) );
}