At the moment, the ProcessingEngine class coordinates the Reader and Writer classes. It contains the main method to coordinate them. We have to edit the ProcessingEngine class located in the src/main/java/monedero/ directory and change Writer with Validator, as in Listing 2.10.
The following is the content of Listing 2.10, ProcessingEngine.java:
package monedero;public class ProcessingEngine { public static void main(String[] args) { String servers = args[0]; String groupId = args[1]; String inputTopic = args[2]; String validTopic = args[3]; String invalidTopic = args[4]; Reader reader = new Reader(servers, groupId, inputTopic); Validator validator = new Validator(servers, validTopic, invalidTopic); reader.run(validator); ...