Apex Sample Code & Test; Salesforce

Result:

public class SumCalculator implements System.Callable {

    public Object call(String action, Map<String, Object> args) {

        // Extract input & output maps

        Map<String, Object> input  = (Map<String, Object>) args.get('input');

        Map<String, Object> output = (Map<String, Object>) args.get('output');

        try {

            // Read numbers from input JSON

            Decimal a = (Decimal) input.get('a');

            Decimal b = (Decimal) input.get('b');

            // Validate inputs

            if (a == null || b == null) {

                output.put('success', false);

                output.put('message', 'Both a and b are required');

                output.put('sum', null);

                return output;

            }

            // Calculate sum

            Decimal sum = a + b;

            // Return response

            output.put('success', true);

            output.put('sum', sum);

            output.put('message', 'Sum calculated successfully');

        } catch (Exception e) {

            output.put('success', false);

            output.put('message', e.getMessage());

            output.put('sum', null);

        }

        return output;

    }

} 



Debug code:


Map<String, Object> input = new Map<String, Object>{

    'a' => 5,

    'b' => 15

};

Map<String, Object> args = new Map<String, Object>{

    'input' => input,

    'output' => new Map<String, Object>()

};

SumCalculator calc = new SumCalculator();

Map<String, Object> result =

    (Map<String, Object>) calc.call('add', args);

System.debug(result);