public void DeleteIndexes(int indexToRetain, string indexPrefix)
{
indexToRetain = indexToRetain <= 0 ? _defautltIndexCopyCount : indexToRetain;
var indexNameDelimeter = new[] { '_' };
var indexToDeleteCount = _client
.IndicesStats(Indices.All, null, string.Empty)
.Indices
.Count(x => x.Key.StartsWith(indexPrefix) && x.Key.Split(indexNameDelimeter).Count() == 2);
if (indexToDeleteCount > indexToRetain)
{
var indicesToBeDelete = _client
.IndicesStats(Indices.All, null, string.Empty)
.Indices
.Where(x => x.Key.StartsWith(indexPrefix))
.OrderByDescending(x => x.Key.Split(indexNameDelimeter).Last())
.Skip(indexToRetain)
.ToList();
_logger.Debug($"Deleting {indicesToBeDelete.Count()} indexes...");
foreach (var index in indicesToBeDelete)
{
_logger.Debug($"Deleting {index.Key}");
DeleteIndex(index.Key);
}
}
_logger.Debug("Deletion completed...");
}