Module: ActionMCP::Server::Handlers::TaskHandler

Includes:
ErrorAware
Included in:
JsonRpcHandler
Defined in:
lib/action_mcp/server/handlers/task_handler.rb

Overview

Handler for MCP 2025-11-25 Tasks feature Tasks provide durable state machines for tracking async request execution

Instance Method Summary collapse

Instance Method Details

#process_tasks(rpc_method, id, params) ⇒ Object 



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# File 'lib/action_mcp/server/handlers/task_handler.rb', line 11

def process_tasks(rpc_method, id, params)
  params ||= {}

  with_error_handling(id) do
    unless params.is_a?(Hash)
      raise JSON_RPC::JsonRpcError.new(:invalid_params, message: "Task params must be an object")
    end

    unless transport.session.protocol_version == "2025-11-25"
      raise JSON_RPC::JsonRpcError.new(:method_not_found,
                                       message: "Tasks are only available in MCP 2025-11-25")
    end

    task_capabilities = negotiated_task_capabilities
    unless task_capabilities
      raise JSON_RPC::JsonRpcError.new(:method_not_found,
                                       message: "Tasks are not available for this session")
    end

    if rpc_method == JsonRpcHandlerBase::Methods::TASKS_LIST && !task_capabilities.key?(:list)
      raise JSON_RPC::JsonRpcError.new(:method_not_found,
                                       message: "Task listing is not available for this session")
    end

    if rpc_method == JsonRpcHandlerBase::Methods::TASKS_CANCEL && !task_capabilities.key?(:cancel)
      raise JSON_RPC::JsonRpcError.new(:method_not_found,
                                       message: "Task cancellation is not available for this session")
    end

    handler = task_method_handlers[rpc_method]
    if handler
      send(handler, id, params)
    else
      Rails.logger.warn("Unknown tasks method: #{rpc_method}")
      raise JSON_RPC::JsonRpcError.new(:method_not_found, message: "Unknown tasks method: #{rpc_method}")
    end
  end
end