Piscal processing work

Core.Tests/Remote/PiscalSshClientTests.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Configuration;
+using System.IO;
 using System.Linq;
 using LeafWeb.Core.Remote;
 using LeafWeb.Core.Utility;
@@ -10,17 +11,19 @@ namespace LeafWeb.Core.Tests.Remote
 	[TestFixture]
 	public class PiscalSshClientTests
 	{
+		private const string ContentDirectory = @"Parsers\LeafInputData\";
+
 		private readonly PiscalLeafInput _testInput =
 			new PiscalLeafInput
 			{
 				LeafInputId = 1,
-				DirectoryName = "TestDirectory2",
+				DirectoryName = "TestDirectory3",
 				PhotosyntheticType = "C4_photosynthesis_leafweb",
 				InputFiles = new[]
 				{
 					new PiscalLeafInputFile
 					{
-						Filename = "blah", Contents = "test".GetBytes()
+						Filename = "valid.csv", Contents = File.ReadAllBytes(FileUtility.GetContentFile(ContentDirectory, "LeafInput-valid.csv").FullName)
 					}
 				}
 			};
@@ -28,17 +31,22 @@ namespace LeafWeb.Core.Tests.Remote
 		private readonly string _piscalConnectionString =
 			ConfigurationManager.ConnectionStrings["PiscalServer"].ConnectionString;
 
+		private PiscalSshClient GetTestClient()
+		{
+			return new PiscalSshClient(_piscalConnectionString);
+		}
+
 		[Test]
 		public void SubmitLeafInputFile()
 		{
-			var client = new PiscalSshClient(_piscalConnectionString);
+			var client = GetTestClient();
 			client.RunLeafInput(_testInput);
 		}
 
 		[Test]
 		public void GetLeafInputStatus()
 		{
-			var client = new PiscalSshClient(_piscalConnectionString);
+			var client = GetTestClient();
 			var leafInputStatus = client.GetLeafInputStatus(_testInput);
 			Console.WriteLine(leafInputStatus);
 		}
@@ -46,10 +54,17 @@ namespace LeafWeb.Core.Tests.Remote
 		[Test]
 		public void RetrieveLeafOutput()
 		{
-			var client = new PiscalSshClient(_piscalConnectionString);
+			var client = GetTestClient();
 			var result = client.RetrieveLeafOutput(_testInput).ToList();
 			Console.WriteLine(string.Join(", ", result.Select(o => o.Filename)));
 			//Console.WriteLine(result[0].Contents.GetString());
 		}
+
+		[Test]
+		public void CleanLeafOutput()
+		{
+			var client = GetTestClient();
+			client.CleanupLeafProcess(_testInput);
+		}
 	}
 }

Core/Core.csproj

@@ -50,6 +50,10 @@
       <HintPath>..\packages\fasterflect.2.1.3\lib\net40\Fasterflect.dll</HintPath>
       <Private>True</Private>
     </Reference>
+    <Reference Include="NLog, Version=4.0.0.0, Culture=neutral, PublicKeyToken=5120e14c03d0593c, processorArchitecture=MSIL">
+      <HintPath>..\packages\NLog.4.2.3\lib\net45\NLog.dll</HintPath>
+      <Private>True</Private>
+    </Reference>
     <Reference Include="Renci.SshNet, Version=2013.4.7.0, Culture=neutral, processorArchitecture=MSIL">
       <HintPath>..\packages\SSH.NET.2013.4.7\lib\net40\Renci.SshNet.dll</HintPath>
       <Private>True</Private>
@@ -88,6 +92,7 @@
     <Compile Include="Entities\LeafInputStatus.cs" />
     <Compile Include="Parsers\FluxnetSiteCsvParser.cs" />
     <Compile Include="Remote\PiscalClientException.cs" />
+    <Compile Include="Remote\PiscalLeafInput.cs" />
     <Compile Include="Remote\PiscalLeafInputFile.cs" />
     <Compile Include="Remote\PiscalLeafOutputFile.cs" />
     <Compile Include="Remote\PiscalSshClient.cs" />

Core/DAL/DataService.cs

@@ -66,7 +66,7 @@ namespace LeafWeb.Core.DAL
 			_db.SaveChanges();
 		}
 
-		private void SetLeafInputStatusNoUpdate(LeafInput leafInputFile, LeafInputStatusType status, string description = null)
+		private void SetLeafInputStatusNoUpdate(LeafInput leafInputFile, LeafInputStatusType status, string description = null, string details = null)
 		{
 			leafInputFile.CurrentStatus = status;
 			var leafInputFileStatus = new LeafInputStatus
@@ -74,6 +74,7 @@ namespace LeafWeb.Core.DAL
 				Status = status,
 				DateTime = DateTime.Now,
 				Description = description,
+				Details = details,
 				LeafInput = leafInputFile
 			};
 			if (leafInputFile.StatusHistory == null)
@@ -81,9 +82,9 @@ namespace LeafWeb.Core.DAL
 			leafInputFile.StatusHistory.Add(leafInputFileStatus);
 		}
 
-		public void SetLeafInputStatus(LeafInput leafInput, LeafInputStatusType status, string description = null)
+		public void SetLeafInputStatus(LeafInput leafInput, LeafInputStatusType status, string description = null, string details = null)
 		{
-			SetLeafInputStatusNoUpdate(leafInput, status, description);
+			SetLeafInputStatusNoUpdate(leafInput, status, description, details);
 			UpdateLeafInput(leafInput);
 		}
 

Core/Entities/LeafInputStatus.cs

@@ -11,6 +11,7 @@ namespace LeafWeb.Core.Entities
 		public virtual LeafInput LeafInput { get; set; }
 		public LeafInputStatusType Status { get; set; }
 		public string Description { get; set; }
+		public string Details { get; set; }
 		public DateTime DateTime { get; set; }
 	}
 }

Core/Entities/LeafInputStatusType.cs

@@ -5,6 +5,6 @@ namespace LeafWeb.Core.Entities
 		Pending = 0,
 		Running = 1,
 		Complete = 2,
-		Error = 3
+		Exception = 3
 	}
 }

Core/Remote/IPiscalClient.cs

@@ -8,6 +8,5 @@ namespace LeafWeb.Core.Remote
 		PiscalStatus GetLeafInputStatus(PiscalLeafInput leafInput);
 		IEnumerable<PiscalLeafOutputFile> RetrieveLeafOutput(PiscalLeafInput leafInput);
 		void CleanupLeafProcess(PiscalLeafInput leafInput);
-		string GetErrorMessage(PiscalLeafInput leafInput);
 	}
 }

Core/Remote/PiscalLeafInput.cs

@@ -0,0 +1,40 @@
+using System.Linq;
+using AutoMapper;
+using LeafWeb.Core.Entities;
+using LeafWeb.Core.Utility;
+
+namespace LeafWeb.Core.Remote
+{
+	public class PiscalLeafInput
+	{
+		private static readonly IMapper Mapper;
+		public int LeafInputId { get; set; }
+		public string PhotosyntheticType { get; set; }
+		public string DirectoryName { get; set; }
+		public PiscalLeafInputFile[] InputFiles { get; set; }
+
+		static PiscalLeafInput()
+		{
+			var config =
+				new MapperConfiguration(cfg =>
+				{
+					cfg.CreateMap<LeafInput, PiscalLeafInput>()
+						.ForMember(dest => dest.DirectoryName,
+							opt => opt.MapFrom(src => PiscalUtility.GetPiscalDirectoryName(src)))
+						.ForMember(dest => dest.LeafInputId, opt => opt.MapFrom(src => src.Id))
+						.ForMember(dest => dest.InputFiles, opt => opt.MapFrom(src => src.InputFiles.Select(f => new PiscalLeafInputFile(f)).ToArray()))
+						.ForMember(
+							dest => dest.PhotosyntheticType,
+							opt => opt.MapFrom(src => src.PhotosynthesisType.Id.WhitespaceToUnderscore()));
+				});
+			Mapper = config.CreateMapper();
+		}
+
+		public PiscalLeafInput() { }
+
+		public PiscalLeafInput(LeafInput leafInput)
+		{
+			Mapper.Map(leafInput, this);
+		}
+	}
+}

Core/Remote/PiscalLeafInputFile.cs

@@ -1,43 +1,9 @@
-using System.Linq;
+using AutoMapper;
-using AutoMapper;
 using LeafWeb.Core.Entities;
 using LeafWeb.Core.Utility;
 
 namespace LeafWeb.Core.Remote
 {
-	public class PiscalLeafInput
-	{
-		private static readonly IMapper Mapper;
-		public int LeafInputId { get; set; }
-		public string PhotosyntheticType { get; set; }
-		public string DirectoryName { get; set; }
-		public PiscalLeafInputFile[] InputFiles { get; set; }
-
-		static PiscalLeafInput()
-		{
-			var config =
-			new MapperConfiguration(cfg =>
-			{
-				cfg.CreateMap<LeafInput, PiscalLeafInput>()
-					.ForMember(dest => dest.DirectoryName,
-						opt => opt.MapFrom(src => PiscalUtility.GetPiscalDirectoryName(src)))
-					.ForMember(dest => dest.LeafInputId, opt => opt.MapFrom(src => src.Id))
-					.ForMember(dest => dest.InputFiles, opt => opt.MapFrom(src => src.InputFiles.Select(f => new PiscalLeafInputFile(f)).ToArray()))
-					.ForMember(
-						dest => dest.PhotosyntheticType,
-						opt => opt.MapFrom(src => src.PhotosynthesisType.Id.WhitespaceToUnderscore()));
-			});
-			Mapper = config.CreateMapper();
-		}
-
-		public PiscalLeafInput() { }
-
-		public PiscalLeafInput(LeafInput leafInput)
-		{
-			Mapper.Map(leafInput, this);
-		}
-	}
-
 	public class PiscalLeafInputFile
 	{
 		private static readonly IMapper Mapper;

Core/Remote/PiscalSshClient.cs

@@ -4,6 +4,7 @@ using System.Data.Common;
 using System.IO;
 using System.Linq;
 using LeafWeb.Core.Utility;
+using NLog;
 using Renci.SshNet;
 
 namespace LeafWeb.Core.Remote
@@ -14,10 +15,11 @@ namespace LeafWeb.Core.Remote
 		private const string RemoteScriptPath = BaseDirectory + "/piscal_manager.sh";
 		private readonly PasswordConnectionInfo _connectionInfo;
 
-		private const string StatusSuccess = "success";
+		private const string StatusComplete = "complete";
 		private const string StatusRunning = "running";
 		private const string StatusNotStarted = "not started";
-		private const string StatusError = "error";
+
+		Logger _logger = LogManager.GetCurrentClassLogger();
 
 		public PiscalSshClient(string connectionString)
 		{
@@ -45,10 +47,10 @@ namespace LeafWeb.Core.Remote
 			using (var scp = GetScpClient())
 			foreach (var file in leafInput.InputFiles)
 			{
-				var inputPath = $"{directory}/{file.Filename}";
+				var inputPath = $"{directory}/input/{file.Filename}";
 				using (var stream = new MemoryStream(file.Contents))
 				{
-					Console.WriteLine(inputPath);
+					_logger.Trace("Copying " + inputPath);
 					scp.Connect();
 					scp.Upload(stream, inputPath);
 					scp.Disconnect();
@@ -66,8 +68,7 @@ namespace LeafWeb.Core.Remote
 			using (var ssh = GetSshClient())
 			{
 				ssh.Connect();
-				var commandText = $"{RemoteScriptPath} -d {leafInput.DirectoryName} -p {leafInput.PhotosyntheticType}";
+				var commandText = $"{RemoteScriptPath} -d {leafInput.DirectoryName} -p {leafInput.PhotosyntheticType} -s";
-				Console.Write(commandText);
 				var command = ssh.CreateCommand(commandText);
 				command.Execute();
 				ssh.Disconnect();
@@ -75,7 +76,7 @@ namespace LeafWeb.Core.Remote
 				if (command.ExitStatus != 0)
 					throw new PiscalClientException(command.Result);
 
-				Console.Write(command.Result);
+				_logger.Debug(command.Result);
 			}
 		}
 
@@ -87,12 +88,12 @@ namespace LeafWeb.Core.Remote
 			{
 				case StatusRunning:
 					return PiscalStatus.Running;
-				case StatusSuccess:
+				case StatusComplete:
-					return PiscalStatus.Success;
+					return PiscalStatus.Complete;
 				case StatusNotStarted:
 					return PiscalStatus.NotStarted;
 				default:
-					return PiscalStatus.Error;
+					throw new PiscalClientException("Unknown status: " + statusRaw[0]);
 			}
 		}
 
@@ -101,7 +102,7 @@ namespace LeafWeb.Core.Remote
 			using (var ssh = GetSshClient())
 			{
 				ssh.Connect();
-				var commandText = $"{RemoteScriptPath} -d {leafInput.DirectoryName} -s";
+				var commandText = $"{RemoteScriptPath} -d {leafInput.DirectoryName}";
 				var command = ssh.CreateCommand(commandText);
 				command.Execute();
 				ssh.Disconnect();
@@ -123,7 +124,7 @@ namespace LeafWeb.Core.Remote
 		{
 			// get output files
 			var status = GetLeafInputStatusRaw(leafInput);
-			if (status[0] != StatusSuccess)
+			if (status[0] != StatusComplete)
 				throw new PiscalClientException("output not available, status is " + status[0]);
 
 			var filePaths = status.Skip(1);
@@ -149,23 +150,9 @@ namespace LeafWeb.Core.Remote
 				scp.Disconnect();
 			}
 		}
-
+		
-		public string GetErrorMessage(PiscalLeafInput leafInput)
-		{
-			var status = GetLeafInputStatusRaw(leafInput);
-			if (status[0] != StatusError)
-				return string.Empty;
-
-			var errorLines = status.Skip(1).ToArray();
-			return errorLines.Join(Environment.NewLine);
-		}
-
 		public void CleanupLeafProcess(PiscalLeafInput leafInput)
 		{
-			var status = GetLeafInputStatusRaw(leafInput);
-			if (status[0] == StatusRunning)
-				throw new PiscalClientException("Trying to cleanup a running process");
-
 			using (var ssh = GetSshClient())
 			{
 				ssh.Connect();

Core/Remote/PiscalStatus.cs

@@ -2,9 +2,8 @@ namespace LeafWeb.Core.Remote
 {
 	public enum PiscalStatus
 	{
-		Running,
+		NotStarted, // Process has not been started
-		Success,
+		Running, // Process is currently executing
-		NotStarted,
+		Complete, // Process has completed
-		Error
 	}
 }

Core/packages.config

@@ -4,5 +4,6 @@
   <package id="CsvHelper" version="2.13.2.0" targetFramework="net45" />
   <package id="EntityFramework" version="6.1.3" targetFramework="net45" />
   <package id="fasterflect" version="2.1.3" targetFramework="net45" />
+  <package id="NLog" version="4.2.3" targetFramework="net45" />
   <package id="SSH.NET" version="2013.4.7" targetFramework="net45" />
 </packages>

Web.Tests/ViewModels/ResultStatus/ResultStatusViewModelTests.cs

@@ -61,7 +61,7 @@ namespace LeafWeb.Web.Tests.ViewModels.ResultStatus
 		public void CanConstructFromLeafInputFile_Error()
 		{
 			var leafInput = GetLeafInput();
-			leafInput.CurrentStatus = LeafInputStatusType.Error;
+			leafInput.CurrentStatus = LeafInputStatusType.Exception;
 			leafInput.StatusHistory = new []
 			{
 				new LeafInputStatus
@@ -69,12 +69,12 @@ namespace LeafWeb.Web.Tests.ViewModels.ResultStatus
 					DateTime = DateTime.Today,
 					LeafInput = leafInput,
 					Description = "My Error",
-					Status = LeafInputStatusType.Error
+					Status = LeafInputStatusType.Exception
 				}
 			};
 			var viewModel = new ResultStatusViewModel(leafInput);
 			
-			Assert.That(viewModel.CurrentStatus, Is.EqualTo(LeafInputStatusType.Error.ToString()));
+			Assert.That(viewModel.CurrentStatus, Is.EqualTo(LeafInputStatusType.Exception.ToString()));
 			Assert.That(viewModel.ErrorMessages[0], Is.EqualTo(leafInput.StatusHistory.First().Description));
 		}
 	}

Web.Tests/Web.Tests.csproj

@@ -47,6 +47,7 @@
     <Compile Include="ViewModels\ResultStatus\ResultStatusViewModelTests.cs" />
   </ItemGroup>
   <ItemGroup>
+    <None Include="app.config" />
     <None Include="packages.config" />
   </ItemGroup>
   <ItemGroup>

Web.Tests/app.config

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+  <runtime>
+    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
+      <dependentAssembly>
+        <assemblyIdentity name="Newtonsoft.Json" publicKeyToken="30ad4fe6b2a6aeed" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-8.0.0.0" newVersion="8.0.0.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="WebGrease" publicKeyToken="31bf3856ad364e35" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-1.6.5135.21930" newVersion="1.6.5135.21930" />
+      </dependentAssembly>
+    </assemblyBinding>
+  </runtime>
+</configuration>

Web/Services/EmailNotificationService.cs

@@ -34,17 +34,17 @@ namespace LeafWeb.Web.Services
 		public void SendLeafWebError(int leafInputId, string errorMessage)
 		{
 			var leafInput = _dataService.GetLeafInput(leafInputId);
-			var body = $"Your LeafWeb analysis job, {leafInput.Identifier}, encountered the following errors." + Environment.NewLine
+			var body = $"Your leaf analysis job, {leafInput.Identifier}, encountered the following errors." + Environment.NewLine
 				+ "You will need to correct your input and resubmit." + Environment.NewLine + Environment.NewLine
 				+ errorMessage;
 			var message = new MailMessage(_emaialFromAddress, leafInput.Email, "LeafWeb processing error", body);
 			SendMessage(message);
 		}
 
-		public void SendLeafWebSuccess(int leafInputId)
+		public void SendLeafWebComplete(int leafInputId)
 		{
 			var leafInput = _dataService.GetLeafInput(leafInputId);
-			var body = $"Your LeafWeb analysis job, {leafInput.Identifier}, has completed." + Environment.NewLine;
+			var body = $"Your leaf analysis job, {leafInput.Identifier}, has completed." + Environment.NewLine;
 			var message = new MailMessage(_emaialFromAddress, leafInput.Email, "LeafWeb results", body);
 
 			var fileStreams =

Web/Services/PiscalQueueManager.cs

@@ -76,9 +76,11 @@ namespace LeafWeb.Web.Services
 			catch (PiscalClientException ex)
 			{
 				logger.Error("LeafInputFile: {0}, ProcessQueue Exception: {1}", pending.Id, ex.Message);
-				_dataService.SetLeafInputStatus(pending, LeafInputStatusType.Error, "Error occurred submitting LeafInput");
+				_dataService.SetLeafInputStatus(pending, LeafInputStatusType.Exception, "Error occurred starting LeafInput", ex.Message);
+				logger.Info("LeafInputFile: {0}, Cleanup", pending.Id);
+				_piscalService.Cleanup(pending);
 
-				// TODO: re-queue
+				// TODO: re-queue?
 				//_dataService.SetLeafInputFileStatus(queuedFile, LeafInputStatusType.Queued, "Re-queuing LeafInput");
 			}
 			_dataService.SetLeafInputStatus(pending, LeafInputStatusType.Running);
@@ -87,66 +89,54 @@ namespace LeafWeb.Web.Services
 		private void ProcessRunning(ILogger logger)
 		{
 			var running = _dataService.GetLeafInputs(LeafInputStatusType.Running).ToList();
-			foreach (var file in running)
+			foreach (var leafInput in running)
 			{
-				var status = _piscalService.GetStatus(file);
 				try
 				{
+					var status = _piscalService.GetStatus(leafInput);
 					switch (status)
 					{
+						case PiscalStatus.NotStarted:
+							logger.Warn("LeafInputFile: {0}, Not Started, re-queueing", leafInput.Id);
+							// if it's not started, try to requeue the process - unusual state
+							_dataService.SetLeafInputStatus(leafInput, LeafInputStatusType.Pending);
+							break;
+
 						case PiscalStatus.Running:
-							logger.Trace("LeafInputFile: {0}, Running", file.Id);
+							logger.Trace("LeafInputFile: {0}, Running", leafInput.Id);
 							// continue running
 							break;
 
-						case PiscalStatus.Success:
+						case PiscalStatus.Complete:
-							logger.Info("LeafInputFile: {0}, Success", file.Id);
+							logger.Info("LeafInputFile: {0}, Complete", leafInput.Id);
 							// collect the leaf output
-							var leafOutputFiles = _piscalService.RetrieveOutputFiles(file).ToList();
+							var leafOutputFiles = _piscalService.RetrieveOutputFiles(leafInput).ToList();
 							foreach (var outputFile in leafOutputFiles)
 								_dataService.AddLeafOutputFile(outputFile);
 
-							logger.Info("LeafInputFile: {0}, output files: {1}", file.Id,
+							logger.Info("LeafInputFile: {0}, output files: {1}", leafInput.Id,
 								string.Join(", ", leafOutputFiles.Select(o => o.Filename)));
 
 							// update db
-							_dataService.SetLeafInputStatus(file, LeafInputStatusType.Complete);
+							_dataService.SetLeafInputStatus(leafInput, LeafInputStatusType.Complete);
 
-							BackgroundJob.Enqueue(() => _emailService.SendLeafWebSuccess(file.Id));
+							BackgroundJob.Enqueue(() => _emailService.SendLeafWebComplete(leafInput.Id));
 
 							// remove working data from the server
-							logger.Info("LeafInputFile: {0}, Cleanup", file.Id);
+							logger.Info("LeafInputFile: {0}, Cleanup", leafInput.Id);
-							_piscalService.Cleanup(file);
+							_piscalService.Cleanup(leafInput);
-							break;
-
-						case PiscalStatus.NotStarted:
-							logger.Warn("LeafInputFile: {0}, Not Started, re-queueing", file.Id);
-							// if it's not started, try to requeue the process - unusual state
-							_dataService.SetLeafInputStatus(file, LeafInputStatusType.Pending);
-							break;
-
-						case PiscalStatus.Error:
-							logger.Info("LeafInputFile: {0}, Error", file.Id);
-
-							var errorMessage = _piscalService.GetErrorMessage(file);
-							logger.Info("LeafInputFile: {0}, Error Message: {1}", file.Id, errorMessage);
-
-							_dataService.SetLeafInputStatus(file, LeafInputStatusType.Error, errorMessage);
-
-							BackgroundJob.Enqueue(() => _emailService.SendLeafWebError(file.Id, errorMessage));
-
-							// remove working data from the server
-							logger.Info("LeafInputFile: {0}, Cleanup", file.Id);
-							_piscalService.Cleanup(file);
 							break;
 					}
 				}
 				catch (PiscalClientException ex)
 				{
-					logger.Error("LeafInputFile: {0}, ProcessRunning Exception: {1}", file.Id, ex.Message);
+					logger.Error("LeafInputFile: {0}, ProcessRunning Exception: {1}", leafInput.Id, ex.Message);
-					_dataService.SetLeafInputStatus(file, LeafInputStatusType.Error, "Error occurred processing LeafInput");
+					_dataService.SetLeafInputStatus(leafInput, LeafInputStatusType.Exception, "Error occurred processing LeafInput", ex.Message);
 
-					// TODO: re-queue
+					// TODO: Send email
+					logger.Info("LeafInputFile: {0}, Cleanup", leafInput.Id);
+					_piscalService.Cleanup(leafInput);
+					// TODO: re-queue ?
 				}
 			}
 		}

Web/Services/PiscalService.cs

@@ -41,13 +41,7 @@ namespace LeafWeb.Web.Services
 				yield return leafOutputFile;
 			}
 		}
-
+		
-		public string GetErrorMessage(LeafInput leafInput)
-		{
-			var inputFile = new PiscalLeafInput(leafInput);
-			return _piscalClient.GetErrorMessage(inputFile);
-		}
-
 		public void Cleanup(LeafInput leafInput)
 		{
 			var input = new PiscalLeafInput(leafInput);

Web/ViewModels/ResultStatus/ResultStatusViewModel.cs

@@ -43,7 +43,7 @@ namespace LeafWeb.Web.ViewModels.ResultStatus
 						opt => opt.ResolveUsing(
 							src =>
 								src.StatusHistory?
-								.Where(sh => sh.Status == LeafInputStatusType.Error)
+								.Where(sh => sh.Status == LeafInputStatusType.Exception)
 								.Select(sh => sh.Description)
 								.ToArray() 
 								?? new string[] {}));