From f3ed5e9501030ba6a92a86b7bba441596f5bdab8 Mon Sep 17 00:00:00 2001
From: Ricardo Arenas <riarenas@microsoft.com>
Date: Fri, 1 Mar 2019 12:14:18 -0800
Subject: [PATCH] add 5 hour expiration when checking if file is up to date

---
 .../JobSender/Payloads/DirectoryPayload.cs                  | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/Microsoft.DotNet.Helix/JobSender/Payloads/DirectoryPayload.cs b/src/Microsoft.DotNet.Helix/JobSender/Payloads/DirectoryPayload.cs
index 04727fb23e3..a91b7c95da6 100644
--- a/src/Microsoft.DotNet.Helix/JobSender/Payloads/DirectoryPayload.cs
+++ b/src/Microsoft.DotNet.Helix/JobSender/Payloads/DirectoryPayload.cs
@@ -21,6 +21,7 @@ public DirectoryPayload(string directory, string archiveEntryPrefix)
             }
         }
 
+        private const int CacheExpiryHours = 5;
         public DirectoryInfo DirectoryInfo { get; }
 
         public string NormalizedDirectoryPath => Helpers.RemoveTrailingSlash(DirectoryInfo.FullName);
@@ -104,6 +105,11 @@ private async Task<string> DoUploadAsync(IBlobContainer payloadContainer, Action
 
         private bool IsUpToDate(FileInfo alreadyUploadedFile)
         {
+            if (alreadyUploadedFile.LastWriteTimeUtc.AddHours(CacheExpiryHours) < DateTime.UtcNow)
+            {
+                return false;
+            }
+
             var newestFileWriteTime = DirectoryInfo.EnumerateFiles("*", SearchOption.AllDirectories)
                 .Select(file => file.LastWriteTimeUtc)
                 .Max();