Configuration

Options

In the na62-farm-lib project there is a class called Options. This is used to define program parameters for na62-farm, na62-trigger-test and na62-trigger-algorithms in the following way: For each project a class called MyOptions inheriting from Options is created. In the static method load all possible options are defined with a corresponding string. This string can be used in run time to retrieve the value of the parameter.

Defining new Option parameters

To add a new option you have to do two things:

• Define the string YOUR_OPTION identifying the option. This string must also be used to set the option value when running the program as in ./na62-farm --YourOption=someValue
• Add the option to the desc object in the load method. The syntax is like following:

(YOUR_OPTION, po::value<OptionType>()->default_value(defaultValue), "Description availablie when calling --help")

(YOUR_OPTION2, po::value<OptionType>()->required(), "Program will not run when this option is not defined")

Please leave a blank line between every option as the autoformater destroys the structure otherwise

Retrieving the option value

For every data type there is one getter function implemented in Options. If you have defined an option identified by OPTION_SOME_NAME with type int you can retrieve it's value like following:

Options::GetInt(OPTION_SOME_NAME);

WARNING

Please note that Options is implemented to offer a simple way to easily add parameters and retrieve new program parameters. However retrieving values is not very efficient and you should do that only during initialization time. So please store your parameter values in your own buffer similar to following code:

void MyClass::initialize(){
   MyClass::myParameter = Options::GetInt(OPTION_My_OPTION);
}

Other getter functions