Raven.Database.DocumentDatabase.GetIndexDefinition C# (CSharp) Method

		public IndexDefinition GetIndexDefinition(string index)
		{
			index = IndexDefinitionStorage.FixupIndexName(index);
			return IndexDefinitionStorage.GetIndexDefinition(index);
		}

		public void Execute(DocumentDatabase database)
		{
			Database = database;


			var indexDefinition = database.GetIndexDefinition(RavenDocumentsByExpirationDate);
			if (indexDefinition == null)
			{
				database.PutIndex(RavenDocumentsByExpirationDate,
								  new IndexDefinition
								  {
									  Map =
										  @"
	from doc in docs
	let expiry = doc[""@metadata""][""Raven-Expiration-Date""]
	where expiry != null
	select new { Expiry = expiry }
"
								  });
			}

			var deleteFrequencyInSeconds = database.Configuration.GetConfigurationValue<int>("Raven/Expiration/DeleteFrequencySeconds") ?? 300;
			logger.Info("Initialized expired document cleaner, will check for expired documents every {0} seconds",
						deleteFrequencyInSeconds);
			timer = new Timer(TimerCallback, null, TimeSpan.FromSeconds(deleteFrequencyInSeconds), TimeSpan.FromSeconds(deleteFrequencyInSeconds));

		}