Class: Profiler::MCP::Server

Inherits:
Object
  • Object
show all
Defined in:
lib/profiler/mcp/server.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Server

Returns a new instance of Server.



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# File 'lib/profiler/mcp/server.rb', line 19

def initialize
  tools = build_tools
  resources, @resource_handlers = build_resources

  @server = ::MCP::Server.new(
    name: "rails-profiler",
    version: Profiler::VERSION,
    tools: tools,
    resources: resources
  )

  @server.resources_read_handler do |params|
    uri = params[:uri]
    handler = @resource_handlers[uri]
    next [{ uri: uri, mimeType: "application/json", text: "Resource not found: #{uri}" }] unless handler

    result = handler.call
    [{ uri: result[:uri], mimeType: result[:mimeType], text: result[:text] }]
  end
end

Class Method Details

.instance ⇒ Object 



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# File 'lib/profiler/mcp/server.rb', line 9

def instance
  @instance ||= new
end

.rack_app ⇒ Object 



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# File 'lib/profiler/mcp/server.rb', line 13

def rack_app
  # Memoized at class level — survives route reloads in development
  @rack_app ||= ->(env) { instance.http_transport.handle_request(Rack::Request.new(env)) }
end

Instance Method Details

#http_transport ⇒ Object 



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# File 'lib/profiler/mcp/server.rb', line 40

def http_transport
  @http_transport ||= begin
    t = ::MCP::Server::Transports::StreamableHTTPTransport.new(@server)
    @server.transport = t
    t
  end
end

#start(transport: :stdio) ⇒ Object 



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# File 'lib/profiler/mcp/server.rb', line 48

def start(transport: :stdio)
  case transport
  when :stdio
    ::MCP::Server::Transports::StdioTransport.new(@server).open
  when :http
    $stderr.puts "MCP HTTP transport active — endpoint: /_profiler/mcp"
  else
    raise Error, "Unknown transport: #{transport}"
  end
end