added ClearScroll(scrollId) extension method

Author: Mpdreamz

src/Nest/ConvenienceExtensions/ScrollExtensions.cs

@@ -1,4 +1,4 @@
-using System.Threading.Tasks;
+using System.Threading.Tasks;
 
 namespace Nest
 {
@@ -38,5 +38,25 @@ public static Task<ISearchResponse<T>> ScrollAsync<T>(this IElasticClient client
 		{
 			return client.ScrollAsync<T>(s => s.Scroll(scrollTime).ScrollId(scrollId));
 		}
+		
+		/// <summary>
+		/// Deletes a registered scroll request on the cluster 
+		/// <para> </para>http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-request-scroll.html
+		/// </summary>
+		/// <param name="selector">Specify the scroll id as well as request specific configuration</param>
+		public static IEmptyResponse ClearScroll(this IElasticClient client, string scrollId) 
+		{
+			return client.ClearScroll(s => s.ScrollId(scrollId));
+		}
+		
+		/// <summary>
+		/// Deletes a registered scroll request on the cluster 
+		/// <para> </para>http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-request-scroll.html
+		/// </summary>
+		/// <param name="selector">Specify the scroll id as well as request specific configuration</param>
+		public static Task<IEmptyResponse> ClearScrollAsync(this IElasticClient client, string scrollId) 
+		{
+			return client.ClearScroll(s => s.ScrollId(scrollId));
+		}
 	}
 }

src/Nest/IElasticClient.cs

@@ -20,6 +20,33 @@ public interface IElasticClient
 		/// <returns>An IObservable you can subscribe to to listen to the progress of the reindexation process</returns>
 		IObservable<IReindexResponse<T>> Reindex<T>(Func<ReindexDescriptor<T>, ReindexDescriptor<T>> reindexSelector)
 			where T : class;
+		
+		/// <summary>
+		/// A search request can be scrolled by specifying the scroll parameter. 
+		/// <para>The scroll parameter is a time value parameter (for example: scroll=5m), 
+		/// indicating for how long the nodes that participate in the search will maintain relevant resources in
+		/// order to continue and support it.</para><para> 
+		/// This is very similar in its idea to opening a cursor against a database.</para>
+		/// <para> </para><para>http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-request-scroll.html</para>
+		/// </summary>
+		/// <typeparam name="T">The type that represents the result hits</typeparam>
+		/// <param name="scrollSelector">A descriptor that describes the scroll operation</param>
+		/// <returns>A query response holding T hits as well as the ScrollId for the next scroll operation</returns>
+		ISearchResponse<T> Scroll<T>(Func<ScrollDescriptor<T>, ScrollDescriptor<T>> scrollSelector)
+			where T : class;
+		
+		/// <summary>
+		/// A search request can be scrolled by specifying the scroll parameter. 
+		/// <para>The scroll parameter is a time value parameter (for example: scroll=5m), 
+		/// indicating for how long the nodes that participate in the search will maintain relevant resources in
+		/// order to continue and support it.</para><para> 
+		/// This is very similar in its idea to opening a cursor against a database.</para>
+		/// </summary>
+		/// <typeparam name="T">The type that represents the result hits</typeparam>
+		/// <param name="scrollSelector">A descriptor that describes the scroll operation</param>
+		/// <returns>A query response holding T hits as well as the ScrollId for the next scroll operation</returns>
+		Task<ISearchResponse<T>> ScrollAsync<T>(Func<ScrollDescriptor<T>, ScrollDescriptor<T>> scrollSelector)
+			where T : class;
 
 		/// <summary>
 		/// The update API allows to update a document based on a script provided. 
@@ -982,10 +1009,18 @@ ISuggestResponse Suggest<T>(Func<SuggestDescriptor<T>, SuggestDescriptor<T>> sel
 		Task<ISuggestResponse> SuggestAsync<T>(Func<SuggestDescriptor<T>, SuggestDescriptor<T>> selector)
 			where T : class;
 
-		/// <inheritdoc />
+		/// <summary>
+		/// Deletes a registered scroll request on the cluster 
+		/// <para> </para>http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-request-scroll.html
+		/// </summary>
+		/// <param name="selector">Specify the scroll id as well as request specific configuration</param>
 		IEmptyResponse ClearScroll(Func<ClearScrollDescriptor, ClearScrollDescriptor> clearScrollSelector);
 
-		/// <inheritdoc />
+		/// <summary>
+		/// Deletes a registered scroll request on the cluster 
+		/// <para> </para>http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-request-scroll.html
+		/// </summary>
+		/// <param name="selector">Specify the scroll id as well as request specific configuration</param>
 		Task<IEmptyResponse> ClearScrollAsync(Func<ClearScrollDescriptor, ClearScrollDescriptor> clearScrollSelector);
 	}
 }