add support for specialized purge interface DurableTask.Core.IOrchest…

…rationServicePurgeClient (#167)

src/DurableTask.Netherite/OrchestrationService/NetheriteOrchestrationService.cs

@@ -21,10 +21,11 @@ namespace DurableTask.Netherite
     /// <summary>
     /// Local partition of the distributed orchestration service.
     /// </summary>
-    public class NetheriteOrchestrationService : 
-        IOrchestrationService, 
-        IOrchestrationServiceClient, 
-        IOrchestrationServiceQueryClient,
+    public class NetheriteOrchestrationService :
+        DurableTask.Core.IOrchestrationService, 
+        DurableTask.Core.IOrchestrationServiceClient,
+        DurableTask.Core.IOrchestrationServicePurgeClient,
+        DurableTask.Netherite.IOrchestrationServiceQueryClient,
         TransportAbstraction.IHost,
         IStorageProvider
     {
@@ -707,6 +708,15 @@ async Task<int> IOrchestrationServiceQueryClient.PurgeInstanceHistoryAsync(DateT
         async Task<InstanceQueryResult> IOrchestrationServiceQueryClient.QueryOrchestrationStatesAsync(InstanceQuery instanceQuery, int pageSize, string continuationToken, CancellationToken cancellationToken)
             => await (await this.GetClientAsync()).QueryOrchestrationStatesAsync(instanceQuery, pageSize, continuationToken, cancellationToken);
 
+        /// <inheritdoc />
+        async Task<PurgeResult> IOrchestrationServicePurgeClient.PurgeInstanceStateAsync(string instanceId)
+            => new PurgeResult(await (await this.GetClientAsync()).DeleteAllDataForOrchestrationInstance(this.GetPartitionId(instanceId), instanceId));
+
+        /// <inheritdoc />
+        async Task<PurgeResult> IOrchestrationServicePurgeClient.PurgeInstanceStateAsync(PurgeInstanceFilter purgeInstanceFilter)
+            => new PurgeResult(await (await this.GetClientAsync()).PurgeInstanceHistoryAsync(purgeInstanceFilter.CreatedTimeFrom, purgeInstanceFilter.CreatedTimeTo, purgeInstanceFilter.RuntimeStatus));
+
+
         /******************************/
         // Task orchestration methods
         /******************************/