To get understanding in which state the Handler currently is, it's necessary to implement OnixS::SURF::MarketData::HandlerStateListener class interface and associate an instance with the Handler using OnixS::SURF::MarketData::Handler::registerHandlerStateListener member.
Below table describes all possible states for the Handler:
| State | Description |
|---|---|
| OnixS::SURF::MarketData::HandlerState::Disconnected | The Handler is disconnected or was not executed yet. |
| OnixS::SURF::MarketData::HandlerState::Disconnecting | The intermediate state when the Handler is not disconnected but not connected. |
| OnixS::SURF::MarketData::HandlerState::Connected | The Handler is connected. |
| OnixS::SURF::MarketData::HandlerState::Connecting | The intermediate state when the Handler is not connected but not disconnected. |
