The constants

The first step is to code our Constants class. This class is a static class with all of the Constants needed in our project.

Open the project with your favorite IDE and, under the src/main/java/kioto directory, create a file called Constants.java with the content of Listing 4.3.

The following is the content of Listing 4.3, Constants.java:

package kioto;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.databind.util.StdDateFormat;
public final class Constants {
  private static final ObjectMapper jsonMapper;
  static {
    ObjectMapper mapper = new ObjectMapper();
    mapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
    mapper.setDateFormat(new StdDateFormat());
    jsonMapper = mapper;
  }
  public static String getHealthChecksTopic() {
    return "healthchecks&quot...