ConnectorFactory

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

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

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

private:
  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

• Uses std::move_only_function to avoid overhead of std::function and enable capture of ownership semantics.
• Supports dynamic module systems or runtime configuration of connector types.
• Not thread-safe by default — external synchronization may be required during registration.