Create Custom Actions Using Apex Invocable Method

1public with sharing class HelloWorld {
2
3    @InvocableMethod(label='Hello World' description='Takes a name and returns a greeting message')
4    public static List<OutputParameters> sayHello(List<InputParameters> inputs) {
5        List<OutputParameters> outputs = new List<OutputParameters>();
6
7        for (InputParameters input : inputs) {
8            OutputParameters output = new OutputParameters();
9            output.greeting = 'Hello, ' + input.name + '!';
10            outputs.add(output);
11        }
12
13        return outputs;
14    }
15
16    public class InputParameters {
17        @InvocableVariable(required=true label='Name' description='The name of the person to greet')
18        public String name;
19    }
20
21    public class OutputParameters {
22        @InvocableVariable(label='Greeting' description='The greeting message')
23        public String greeting;
24    }
25}