import lombok.Setter;
import org.springframework.boot.context.properties.ConfigurationProperties;
+import javax.validation.constraints.NotEmpty;
+import javax.validation.constraints.NotNull;
+
@ConfigurationProperties(prefix = "sumup.gateway")
@Getter
@Setter
public class ApplicationProperties
{
+ @NotNull
+ @NotEmpty
+ private String topic;
private Integer partition;
}