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.gitignore

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+## Ignore Visual Studio temporary files, build results, and
+## files generated by popular Visual Studio add-ons.
+
+# User-specific files
+*.suo
+*.user
+*.sln.docstates
+
+# Build results
+
+[Dd]ebug/
+[Rr]elease/
+x64/
+[Bb]in/
+[Oo]bj/
+
+# MSTest test Results
+[Tt]est[Rr]esult*/
+[Bb]uild[Ll]og.*
+
+*_i.c
+*_p.c
+*_i.h
+*.ilk
+*.meta
+*.obj
+*.pch
+*.pdb
+*.pgc
+*.pgd
+*.rsp
+*.sbr
+*.tlb
+*.tli
+*.tlh
+*.tmp
+*.tmp_proj
+*.log
+*.vspscc
+*.vssscc
+.builds
+*.pidb
+*.log
+*.svclog
+*.scc
+
+# Visual C++ cache files
+ipch/
+*.aps
+*.ncb
+*.opensdf
+*.sdf
+*.cachefile
+
+# Visual Studio profiler
+*.psess
+*.vsp
+*.vspx
+
+# Guidance Automation Toolkit
+*.gpState
+
+# ReSharper is a .NET coding add-in
+_ReSharper*/
+*.[Rr]e[Ss]harper
+*.DotSettings.user
+
+# Click-Once directory
+publish/
+
+# Publish Web Output
+*.Publish.xml
+*.pubxml
+*.azurePubxml
+
+# NuGet Packages Directory
+## TODO: If you have NuGet Package Restore enabled, uncomment the next line
+packages/
+## TODO: If the tool you use requires repositories.config, also uncomment the next line
+!packages/repositories.config
+
+# Windows Azure Build Output
+csx/
+*.build.csdef
+
+# Windows Store app package directory
+AppPackages/
+
+# Others
+sql/
+*.Cache
+ClientBin/
+[Ss]tyle[Cc]op.*
+![Ss]tyle[Cc]op.targets
+~$*
+*~
+*.dbmdl
+*.[Pp]ublish.xml
+
+*.publishsettings
+
+# RIA/Silverlight projects
+Generated_Code/
+
+# Backup & report files from converting an old project file to a newer
+# Visual Studio version. Backup files are not needed, because we have git ;-)
+_UpgradeReport_Files/
+Backup*/
+UpgradeLog*.XML
+UpgradeLog*.htm
+
+# SQL Server files
+App_Data/*.mdf
+App_Data/*.ldf
+
+# =========================
+# Windows detritus
+# =========================
+
+# Windows image file caches
+Thumbs.db
+ehthumbs.db
+
+# Folder config file
+Desktop.ini
+
+# Recycle Bin used on file shares
+$RECYCLE.BIN/
+
+# Mac desktop service store files
+.DS_Store
+
+_NCrunch*

CronApp.sln

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+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.5.2.0
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Scheduler", "Scheduler\Scheduler.csproj", "{87BE8E89-77CB-43F1-E470-643184C5C445}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{87BE8E89-77CB-43F1-E470-643184C5C445}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{87BE8E89-77CB-43F1-E470-643184C5C445}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{87BE8E89-77CB-43F1-E470-643184C5C445}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{87BE8E89-77CB-43F1-E470-643184C5C445}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {78FB926B-235E-4140-99B4-2747F5212FEF}
+	EndGlobalSection
+EndGlobal

Dockerfile

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+FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build
+WORKDIR /src
+COPY . .
+RUN dotnet publish -c Release -o /app
+
+FROM mcr.microsoft.com/dotnet/runtime:8.0
+WORKDIR /app
+COPY --from=build /app .
+ENTRYPOINT ["dotnet", "CronApp.dll"]

Scheduler/Program.cs

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+using Quartz;
+using Quartz.Impl;
+
+class Program
+{
+    static async Task Main()
+    {
+        var scheduler = await new StdSchedulerFactory().GetScheduler();
+        await scheduler.Start();
+
+        var job = JobBuilder.Create<MyJob>()
+            .WithIdentity("job1", "group1")
+            .Build();
+
+        var trigger = TriggerBuilder.Create()
+            .WithIdentity("trigger1", "group1")
+            .WithCronSchedule("0 * * ? * *") // every minute
+            .Build();
+
+        await scheduler.ScheduleJob(job, trigger);
+
+        await Task.Delay(-1);
+    }
+}
+
+public class MyJob : IJob
+{
+    public Task Execute(IJobExecutionContext context)
+    {
+        Console.WriteLine($"Job ran at {DateTime.Now}");
+        return Task.CompletedTask;
+    }
+}

Scheduler/Scheduler.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Quartz" Version="3.15.0" />
+  </ItemGroup>
+
+</Project>

docker-compose.yml

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+version: "3.8"
+
+services:
+  cronapp:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    container_name: cronapp
+    restart: unless-stopped