Spring Boot 2.2 Immutable configuration binding class example

ImmutableStockQuoteSubscriptionProperties.java

package com.example.immutable.configuration.binding;

import lombok.Getter;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.context.properties.ConstructorBinding;

@Getter
@ConfigurationProperties("stock.quote.subscription")
public class ImmutableStockQuoteSubscriptionProperties {

  private final String endpoint;
  private final String apiKey;
  private final SubscriptionType subscriptionType;
  private final boolean enabled;

  @ConstructorBinding
  public ImmutableStockQuoteSubscriptionProperties(String endpoint, String apiKey, SubscriptionType subscriptionType, boolean enabled) {
    this.endpoint = endpoint;
    this.apiKey = apiKey;
    this.subscriptionType = subscriptionType;
    this.enabled = enabled;
  }

  enum SubscriptionType {

    /**
     * Real time stock quotes
     */
    REALTIME,

    /**
     * Stock quotes that are delayed by 15 minutes
     */
    DELAYED,
  }
}