feat: add support for .NET SDK V4

.autover/changes/dd27e0cc-00fb-4dc0-b9c4-92b2ddea42c2.json

@@ -0,0 +1,13 @@
+{
+  "Projects": [
+    {
+      "Name": "AWS.AspNetCore.DistributedCacheProvider",
+      "Type": "Major",
+      "ChangelogMessages": [
+        "Updated the .NET SDK dependencies to the latest version 4.0.0-preview.4",
+        "Marked project as trimmable",
+        "Added SourceLink support"
+      ]
+    }
+  ]
+}

CHANGELOG.md

@@ -1,13 +1,19 @@
-# Changelog
+## Release 2024-04-20
 
-## 0.9.3 (2024-04-20)
+### AWS.AspNetCore.DistributedCacheProvider (0.9.3)
 - Update User-Agent string
 
-## 0.9.2 (2023-07-28)
+## Release 2023-07-28
+
+### AWS.AspNetCore.DistributedCacheProvider (0.9.2)
 - Add PackageReadmeFile attribute to show README file in NuGet
 
-## 0.9.1 (2023-07-28)
+## Release 2023-07-28
+
+### AWS.AspNetCore.DistributedCacheProvider (0.9.1)
 - Added the repository README file to the NuGet package
 
-## 0.9.0 (2023-07-06)
+## Release 2023-07-06
+
+### AWS.AspNetCore.DistributedCacheProvider (0.9.0)
 - Initial preview release

CONTRIBUTING.md

@@ -39,6 +39,42 @@ To send us a pull request, please:
 GitHub provides additional document on [forking a repository](https://help.github.com/articles/fork-a-repo/) and
 [creating a pull request](https://help.github.com/articles/creating-a-pull-request/).
 
+## Adding a `change file` to your contribution branch
+Each contribution branch should include a `change file` that contains a changelog message for each project that has been updated, as well as the type of increment to perform for those changes when versioning the project.
+A `change file` looks like the following example:
+```json
+{
+  "Projects": [
+    {
+      "Name": "AWS.AspNetCore.DistributedCacheProvider",
+      "Type": "Patch",
+      "ChangelogMessages": [
+        "Fixed an issue causing a failure somewhere"
+      ]
+    }
+  ]
+}
+```
+The `change file` lists all the modified projects, the changelog message for each project as well as the increment type. 
+These files are located in the repo at .autover/changes/
+You can use the `AutoVer` tool to create the change file. You can install it using the following command:
+```
+dotnet tool install -g AutoVer
+```
+You can create the `change file` using the following command:
+```
+autover change --project-name "AWS.AspNetCore.DistributedCacheProvider" -m "Fixed an issue causing a failure somewhere
+```
+Note: Make sure to run the command from the root of the repository.
+You can update the command to specify which project you are updating.
+The available projects are:
+* AWS.AspNetCore.DistributedCacheProvider
+The possible increment types are:
+* Patch
+* Minor
+* Major
+Note: You do not need to create a new `change file` for every changelog message or project within your branch. You can create one `change file` that contains all the modified projects and the changelog messages.
+
 
 ## Finding contributions to work on
 Looking at the existing issues is a great way to find something to contribute on. As our projects, by default, use the default GitHub issue labels (enhancement/bug/duplicate/help wanted/invalid/question/wontfix), looking at any 'help wanted' issues is a great place to start.

SampleApp/SampleApp.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
   </PropertyGroup>

buildtools/ci.buildspec.yml

@@ -3,7 +3,7 @@ version: 0.2
 phases:
   install:
     runtime-versions:
-      dotnet: 6.x
+      dotnet: 8.x
   build:
     commands:
       - dotnet test --verbosity normal AWS.DistributedCacheProvider.sln --configuration Release --logger trx --results-directory ./testresults

src/AWS.DistributedCacheProvider/AWS.DistributedCacheProvider.csproj

@@ -1,11 +1,11 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
 	<PropertyGroup>
-		<TargetFramework>net6.0</TargetFramework>
+		<TargetFrameworks>net6.0;net8.0</TargetFrameworks>
 		<RootNamespace>AWS.DistributedCacheProvider</RootNamespace>
 		<ImplicitUsings>enable</ImplicitUsings>
 		<Nullable>enable</Nullable>
-		<Version>0.9.3</Version>
+		<Version>2.0.0-preview.1</Version>
 		<PackageId>AWS.AspNetCore.DistributedCacheProvider</PackageId>
 		<Title>AWS Provider for ASP.NET Core's IDistributedCache</Title>
 		<Description>The AWS Distributed Cache provider provides an IDistributedCache implementation backed by DynamoDB.</Description>
@@ -20,7 +20,16 @@
 		<SignAssembly>true</SignAssembly>
 		<AssemblyOriginatorKeyFile>..\..\public.snk</AssemblyOriginatorKeyFile>
 
-    <PackageReadmeFile>README.md</PackageReadmeFile>
+		<PackageReadmeFile>README.md</PackageReadmeFile>
+
+		<EmbedUntrackedSources>true</EmbedUntrackedSources>
+		<PublishRepositoryUrl>true</PublishRepositoryUrl>
+		<IncludeSymbols>true</IncludeSymbols>
+		<SymbolPackageFormat>snupkg</SymbolPackageFormat>
+	</PropertyGroup>
+
+	<PropertyGroup Condition="'$(TargetFramework)' == 'net8.0'">
+		<IsTrimmable>true</IsTrimmable>
 	</PropertyGroup>
 
 	<ItemGroup>
@@ -35,8 +44,9 @@
 		<PackageReference Include="Microsoft.Extensions.Caching.Abstractions" Version="6.0.0" />
 		<PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="6.0.0" />
 		<PackageReference Include="Microsoft.Extensions.Options" Version="6.0.0" />
-		<PackageReference Include="AWSSDK.DynamoDBv2" Version="3.7.302.15" />
-		<PackageReference Include="AWSSDK.Extensions.NETCore.Setup" Version="3.7.300" />
+		<PackageReference Include="AWSSDK.DynamoDBv2" Version="4.0.0-preview.4" />
+		<PackageReference Include="AWSSDK.Extensions.NETCore.Setup" Version="4.0.0-preview.4" />
+		<PackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0" PrivateAssets="All" />
 	</ItemGroup>
 
 </Project>

src/AWS.DistributedCacheProvider/DynamoDBDistributedCache.cs

@@ -392,8 +392,6 @@ private DateTimeOffset UnixSecondsToDateTimeOffset(string seconds)
             return DateTimeOffset.FromUnixTimeSeconds((long)double.Parse(seconds));
         }
 
-
-
         /// <summary>
         /// Retrieves the value associated with <paramref name="key"/> in the cache and updates the Item's TTL.
         /// If there is no value associated with the <paramref name="key"/> or there is a value, but the Item's TTL
@@ -429,6 +427,12 @@ private DateTimeOffset UnixSecondsToDateTimeOffset(string seconds)
                 throw new DynamoDBDistributedCacheException($"Failed to get Item with key {key}. Caused by {e.Message}", e);
             }
 
+            if (getItemResponse.Item is null)
+            {
+                _logger.LogDebug("DynamoDB did not find an Item associated with the key {key}", key);
+                return null;
+            }
+
             //Check if there is a value we should be returning to the client. If there is no value, there is no reason to refresh the Item
             if (getItemResponse.Item.ContainsKey(VALUE_KEY))
             {

src/AWS.DistributedCacheProvider/Internal/DynamoDBCacheProviderHelper.cs

@@ -64,7 +64,7 @@ public static AttributeValue CalculateTTL(DistributedCacheEntryOptions options)
                 var ttl = DateTimeOffset.UtcNow.Add(((TimeSpan)options.SlidingExpiration));
                 //Cannot be later than the deadline
                 var absoluteTTL = CalculateTTLDeadline(options);
-                if (absoluteTTL.NULL)
+                if (absoluteTTL.NULL is not null && (bool)absoluteTTL.NULL)
                 {
                     return new AttributeValue { N = ttl.ToUnixTimeSeconds().ToString() };
                 }

src/AWS.DistributedCacheProvider/Internal/DynamoDBTableCreator.cs

@@ -72,7 +72,8 @@ public async Task<string> CreateTableIfNotExistsAsync(IAmazonDynamoDB client, st
         private string ValidateTable(TableDescription description)
         {
             var partitionKeyName = "";
-            foreach (var key in description.KeySchema)
+            var keySchema = description.KeySchema ?? new List<KeySchemaElement>();
+            foreach (var key in keySchema)
             {
                 if (key.KeyType.Equals(KeyType.RANGE))
                 {
@@ -81,7 +82,8 @@ private string ValidateTable(TableDescription description)
                 }
                 else //We know the key is of type Hash
                 {
-                    foreach (var attributeDef in description.AttributeDefinitions)
+                    var attributeDefinitions = description.AttributeDefinitions ?? new List<AttributeDefinition>();
+                    foreach (var attributeDef in attributeDefinitions)
                     {
                         if (attributeDef.AttributeName.Equals(key.AttributeName) && attributeDef.AttributeType != ScalarAttributeType.S)
                         {

test/AWS.DistributedCacheProviderIntegrationTests/AWS.DistributedCacheProviderIntegrationTests.csproj

@@ -1,16 +1,16 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
 
     <IsPackable>false</IsPackable>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="AWSSDK.DynamoDBv2" Version="3.7.302.15" />
-    <PackageReference Include="AWSSDK.SecurityToken" Version="3.7.300.75" />
+    <PackageReference Include="AWSSDK.DynamoDBv2" Version="4.0.0-preview.4" />
+    <PackageReference Include="AWSSDK.SecurityToken" Version="4.0.0-preview.4" />
     <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="6.0.1" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.6.0" />
     <PackageReference Include="xunit" Version="2.4.2" />

test/AWS.DistributedCacheProviderUnitTests/AWS.DistributedCacheProviderUnitTests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
 

test/AWS.DistributedCacheProviderUnitTests/DynamoDBDistributedCacheHelperTests.cs

@@ -38,8 +38,8 @@ public void CalculateTTL_NoSlidingWindow_ReturnDeadline()
             };
             var deadline = DynamoDBCacheProviderHelper.CalculateTTLDeadline(options);
             var ttl = DynamoDBCacheProviderHelper.CalculateTTL(options);
-            Assert.False(deadline.NULL);
-            Assert.False(ttl.NULL);
+            Assert.Null(deadline.NULL);
+            Assert.Null(ttl.NULL);
             Assert.Equal(ttl.N, deadline.N);
         }