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Background server #32

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41 changes: 41 additions & 0 deletions MCPSharp.Example.BackgroundServer/MCPSharp.Example.BackgroundServer.csproj
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<Project Sdk="Microsoft.NET.Sdk">

<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net9.0</TargetFramework>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>
<Platforms>AnyCPU;x64</Platforms>
<ProduceReferenceAssembly>False</ProduceReferenceAssembly>
</PropertyGroup>

<PropertyGroup>
<GenerateDocumentationFile>true</GenerateDocumentationFile>
</PropertyGroup>

<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
<DebugType>embedded</DebugType>
</PropertyGroup>

<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
<DebugType>embedded</DebugType>
</PropertyGroup>

<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|AnyCPU'">
<DebugType>embedded</DebugType>
</PropertyGroup>

<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
<DebugType>embedded</DebugType>
</PropertyGroup>

<ItemGroup>
<ProjectReference Include="..\MCPSharp\MCPSharp.csproj" />
</ItemGroup>


<Target Name="PreBuild" BeforeTargets="PreBuildEvent">

</Target>

</Project>
40 changes: 40 additions & 0 deletions MCPSharp.Example.BackgroundServer/Program.cs
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using System;
using System.Threading.Tasks;
using MCPSharp;
using MCPSharp.Model;
using MCPSharp.Model.Schemas;

namespace MCPSharp.Example.BackgroundServer;

/// <summary>
/// This example demonstrates how to run an MCP server in a background thread using MCPServerHost.
/// The server is started asynchronously and will continue to run even after the main thread exits.
/// </summary>
public class Program
{
/// <summary>
/// The main entry point for the MCP server example.
/// </summary>
public static async Task Main()
{
// Start server in background thread
await using var server = await MCPServerHost.StartAsync("BackgroundServer", "1.0.0");

// Add a sample tool
MCPServer.AddToolHandler(new Tool()
{
Name = "greet",
Description = "A simple greeting tool",
InputSchema = new InputSchema
{
Type = "object",
Required = ["name"],
Properties = new Dictionary<string, ParameterSchema>{
{"name", new ParameterSchema{Type="string", Description="Name to greet"}}
}
}
}, (string name) => $"Hello, {name}! (from background server)");

await Task.Delay(-1);
}
}
38 changes: 37 additions & 1 deletion MCPSharp.sln
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@@ -1,4 +1,4 @@


Microsoft Visual Studio Solution File, Format Version 12.00
# Visual Studio Version 17
VisualStudioVersion = 17.12.35707.178
Expand All @@ -13,54 +13,90 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MCPSharp.Example.Import", "
EndProject
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MCPSharp.Example.OllamaChatCLI", "MCPSharp.Example.OllamaChatCLI\MCPSharp.Example.OllamaChatCLI.csproj", "{73FD6F85-CCEE-4D80-8E8B-154F94511DD2}"
EndProject
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MCPSharp.Example.BackgroundServer", "MCPSharp.Example.BackgroundServer\MCPSharp.Example.BackgroundServer.csproj", "{DD4ABB3D-89CF-4C9C-AF62-94CEC22B779D}"
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EndGlobalSection
GlobalSection(SolutionProperties) = preSolution
HideSolutionNode = FALSE
Expand Down
40 changes: 27 additions & 13 deletions MCPSharp/Core/MCPServer.cs
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Expand Up @@ -12,14 +12,22 @@ namespace MCPSharp
/// </summary>
public class MCPServer
{
private static readonly MCPServer _instance = new();
private static MCPServer _instance = new();

/// <summary>
/// Gets the current server instance.
/// </summary>
public static MCPServer Instance => _instance;
private readonly JsonRpc _rpc;
private readonly Stream StandardOutput;

private readonly ToolManager _toolManager = new()
{
ToolChangeNotification = () => { if (EnableToolChangeNotification)
_= _instance._rpc.InvokeWithParameterObjectAsync("notifications/tools/list_changed", null);}
ToolChangeNotification = () =>
{
if (EnableToolChangeNotification)
_ = _instance._rpc.InvokeWithParameterObjectAsync("notifications/tools/list_changed", null);
}
};

private readonly ResourceManager _resouceManager = new();
Expand Down Expand Up @@ -53,14 +61,17 @@ public class MCPServer
private MCPServer()
{
Implementation = new();
_target = new(_toolManager, _resouceManager, Implementation);
_target = new(_toolManager, _resouceManager, Implementation);
Console.SetOut(RedirectedOutput);
_rpc = new JsonRpc(new NewLineDelimitedMessageHandler(new StdioTransportPipe(),
new SystemTextJsonFormatter() {
JsonSerializerOptions = new System.Text.Json.JsonSerializerOptions {
PropertyNameCaseInsensitive = true,
PropertyNamingPolicy = System.Text.Json.JsonNamingPolicy.CamelCase
} }), _target);
_rpc = new JsonRpc(new NewLineDelimitedMessageHandler(new StdioTransportPipe(),
new SystemTextJsonFormatter()
{
JsonSerializerOptions = new System.Text.Json.JsonSerializerOptions
{
PropertyNameCaseInsensitive = true,
PropertyNamingPolicy = System.Text.Json.JsonNamingPolicy.CamelCase
}
}), _target);

_rpc.StartListening();
}
Expand All @@ -76,7 +87,7 @@ private MCPServer()
/// Registers a tool with the server.
/// </summary>
/// <typeparam name="T"></typeparam>
public static void Register<T>() where T : class, new()=>_ = _instance.RegisterAsync<T>();
public static void Register<T>() where T : class, new() => _ = _instance.RegisterAsync<T>();
public async Task RegisterAsync<T>() where T : class, new() { _toolManager.Register<T>(); _resouceManager.Register<T>(); }
public static void AddToolHandler(Tool tool, Delegate func) => _instance._toolManager.AddToolHandler(new ToolHandler(tool, func.Method));

Expand Down Expand Up @@ -141,8 +152,11 @@ private async Task StartPingThreadAsync()
}
}
}

internal void Dispose()

/// <summary>
/// Disposes the server and releases all resources.
/// </summary>
public void Dispose()
{
_cancellationTokenSource.Cancel();
_rpc.Dispose();
Expand Down
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