自定義環境倉庫

Spring Cloud Config 支援透過允許您建立和整合自定義 EnvironmentRepository 實現來增強其配置管理能力。這使得您可以為應用新增獨特的配置源。實現 Ordered 介面並指定 getOrder 方法還可以讓您在複合配置設定中設定自定義倉庫的優先順序。如果不這樣做，自定義倉庫預設會被賦予最低優先順序。

下面是建立和配置自定義 EnvironmentRepository 的示例

public class CustomConfigurationRepository implements EnvironmentRepository, Ordered {

    @Override
    public Environment findOne(String application, String profile, String label) {
        // Simulate fetching configuration from a custom source
        final Map<String, String> properties = Map.of(
            "key1", "value1",
            "key2", "value2",
            "key3", "value3"
        );
        Environment environment = new Environment(application, profile);
        environment.add(new PropertySource("customPropertySource", properties));
        return environment;
    }

    @Override
    public int getOrder() {
        return 0;
    }
}

@Configuration
@Profile("custom")
public class AppConfig {
    @Bean
    public CustomConfigurationRepository customConfigurationRepository() {
        return new CustomConfigurationRepository();
    }
}

透過此設定，如果您在 Spring 應用的配置中啟用 custom profile，您的自定義環境倉庫將被整合到配置服務端。例如，在您的 application.properties 或 application.yml 中指定 custom profile 如下：

spring:
  application:
    name: configserver
  profiles:
    active: custom

現在，訪問配置服務端地址：

https://:8080/any-client/dev/latest

將返回自定義倉庫的預設值，如下所示：

{
  "name": "any-client",
  "profiles": ["dev"],
  "label": "latest",
  "propertySources": [
    {
      "name": "customPropertySource",
      "source": {
        "key1": "value1",
        "key2": "value2",
        "key3": "value3"
      }
    }
  ]
}