ConnectorFactory

ConnectorFactory is a global registry and dynamic constructor for IExchangeConnector instances, used to instantiate exchange adapters based on type and symbol at runtime.

class ConnectorFactory
{
public:
  using CreatorFunc =
      MoveOnlyFunction<std::shared_ptr<IExchangeConnector>(const std::string&)>;

  static ConnectorFactory& instance();
  void registerConnector(const std::string& type, CreatorFunc creator);
  std::shared_ptr<IExchangeConnector> createConnector(const std::string& type,
                                                      const std::string& symbol);

private:
  ConnectorFactory() = default;
  std::unordered_map<std::string, CreatorFunc> _creators;
};

Purpose

• Enable pluggable, type-based instantiation of exchange connectors without static bindings.

Responsibilities

Aspect	Details
Registration	Maps string identifiers (e.g. "bybit", "mock") to creator functions.
Construction	Calls registered factory to produce a connector for a given symbol.
Lifetime	Singleton pattern via instance(); all connectors share same registry.

Notes

• Supports dynamic module systems or runtime configuration of connector types.
• Not thread-safe by default — external synchronization may be required during registration.
• Returns nullptr if the requested connector type is not registered.