From f902a57f608ebcba7e6c2f8328bf3237933e39af Mon Sep 17 00:00:00 2001
From: Jason Alborough <jalborough@pepperdash.com>
Date: Tue, 19 Apr 2022 15:19:27 -0400
Subject: [PATCH] feature: add fileLock for reads

---
 .../PepperDashEssentialsBase/File/FileIO.cs   | 61 +++++++++++++------
 1 file changed, 44 insertions(+), 17 deletions(-)

diff --git a/essentials-framework/Essentials Core/PepperDashEssentialsBase/File/FileIO.cs b/essentials-framework/Essentials Core/PepperDashEssentialsBase/File/FileIO.cs
index 21d9eaec..51d64230 100644
--- a/essentials-framework/Essentials Core/PepperDashEssentialsBase/File/FileIO.cs	
+++ b/essentials-framework/Essentials Core/PepperDashEssentialsBase/File/FileIO.cs	
@@ -79,19 +79,27 @@ namespace PepperDash.Essentials.Core
 		{
 			try
 			{
-				DirectoryInfo dirInfo = new DirectoryInfo(file.Name);
-				Debug.Console(2, "FileIO Getting Data {0}", file.FullName);
-
-				if (File.Exists(file.FullName))
+				if (fileLock.TryEnter())
 				{
-					using (StreamReader r = new StreamReader(file.FullName))
+					DirectoryInfo dirInfo = new DirectoryInfo(file.Name);
+					Debug.Console(2, "FileIO Getting Data {0}", file.FullName);
+
+					if (File.Exists(file.FullName))
 					{
-						return r.ReadToEnd();
+						using (StreamReader r = new StreamReader(file.FullName))
+						{
+							return r.ReadToEnd();
+						}
+					}
+					else
+					{
+						Debug.Console(2, "File {0} does not exsist", file.FullName);
+						return "";
 					}
 				}
 				else
 				{
-					Debug.Console(2, "File {0} does not exsist", file.FullName);
+					Debug.Console(0, Debug.ErrorLogLevel.Error, "FileIO Unable to enter FileLock");
 					return "";
 				}
 				
@@ -101,6 +109,12 @@ namespace PepperDash.Essentials.Core
 				Debug.Console(0, Debug.ErrorLogLevel.Error, "Error: FileIO read failed: \r{0}", e);
 				return "";
 			}
+			finally
+			{
+				if (fileLock != null && !fileLock.Disposed)
+					fileLock.Leave();
+
+			}
 		}
 
 
@@ -133,23 +147,30 @@ namespace PepperDash.Essentials.Core
 			string data;
 			try
 			{
-				DirectoryInfo dirInfo = new DirectoryInfo(file.Name);
-				Debug.Console(2, "FileIO Getting Data {0}", file.FullName);
-
-
-				if (File.Exists(file.FullName))
+				if (fileLock.TryEnter())
 				{
-					using (StreamReader r = new StreamReader(file.FullName))
+					DirectoryInfo dirInfo = new DirectoryInfo(file.Name);
+					Debug.Console(2, "FileIO Getting Data {0}", file.FullName);
+
+
+					if (File.Exists(file.FullName))
 					{
-						data = r.ReadToEnd();
+						using (StreamReader r = new StreamReader(file.FullName))
+						{
+							data = r.ReadToEnd();
+						}
 					}
+					else
+					{
+						Debug.Console(2, "File {0} Does not exsist", file.FullName);
+						data = "";
+					}
+					GotFileEvent.Invoke(null, new FileEventArgs(data));
 				}
 				else
 				{
-					Debug.Console(2, "File {0} Does not exsist", file.FullName);
-					data = "";
+					Debug.Console(0, Debug.ErrorLogLevel.Error, "FileIO Unable to enter FileLock");
 				}
-				GotFileEvent.Invoke(null, new FileEventArgs(data));
 
 			}
 			catch (Exception e)
@@ -157,6 +178,12 @@ namespace PepperDash.Essentials.Core
 				Debug.Console(0, Debug.ErrorLogLevel.Error, "Error: FileIO read failed: \r{0}", e);
 				data = "";
 			}
+			finally
+			{
+				if (fileLock != null && !fileLock.Disposed)
+					fileLock.Leave();
+
+			}