Factory

AwsRequestHandlerDi.java

@Component
@Slf4j
public class AwsRequestHandlerDi {

  private static final Map<ApplicationCommands, INimesaAwsJob> myServiceCache = new HashMap<>();

  private final List<INimesaAwsJob> handlers;

  @Autowired
  private AwsRequestHandlerDi(List<INimesaAwsJob> handlers) {
    this.handlers = handlers;
  }

  public static INimesaAwsJob getService(String command) {
    ApplicationCommands applicationCommands = ApplicationCommands
        .valueOf(command);

    INimesaAwsJob service = myServiceCache.get(applicationCommands);
    if (null == service) {
      throw new RuntimeException("Unknown service type: " + applicationCommands);
    }
    return service;
  }

  @PostConstruct
  public void initMyServiceCache() {
    for (INimesaAwsJob service : handlers) {
      RequestHandler annotation = service.getClass().getAnnotation(RequestHandler.class);
      ApplicationCommands[] commands = annotation.command();
      for (ApplicationCommands command : commands) {
        myServiceCache.put(command, service);
      }
    }
  }
}