Using the Configuration Center in Spring Cloud

Updated on 2024-08-14 GMT+08:00

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When the configuration center is used in Spring Cloud, you need to add the following dependencies to the project:

<dependency> 
  <groupId>com.huaweicloud</groupId>  
  <artifactId>spring-cloud-starter-huawei-config</artifactId> 
</dependency>

If the dependencies have been directly or indirectly included in the project, you do not need to add them. Spring Cloud contains the configuration items listed in Table 1. The values of these configuration items specify the identity of microservices in the configuration center and the interaction between microservices and the configuration center.

**Table 1** Common configuration items of Spring Cloud
Item	Description	Default Value	Remarks
spring.cloud.servicecomb.discovery.appName	Application	default	-
spring.cloud.servicecomb.discovery.serviceName	Microservice name	-	If no service name exists, use spring.application.name.
spring.cloud.servicecomb.discovery.version	Microservice version	-	-
server.env	Environment	-	The value is the environment ID. Example value: production or development.
spring.cloud.servicecomb.config.enabled	Whether to enable dynamic configuration	true	-
spring.cloud.servicecomb.config.serverType	Configuration center type	config-center	For ServiceComb engine 1.x, the value is config-center. For ServiceComb engine 2.x, the value is kie (recommended) or config-center.
spring.cloud.servicecomb.config.serverAddr	Access address. The format is *http(s)://{ip}:{port}*. Use commas (,) to separate multiple addresses.	-	-
spring.cloud.servicecomb.config.fileSource	List of YAML configuration items, which are separated by commas (,)	-	This parameter is valid only when the configuration center is config-center.

Spring Cloud users who use ServiceComb engine 1.x need to frequently add configuration files in YAML format to the configuration center. Spring Cloud Huawei provides the configuration item spring.cloud.servicecomb.config.fileSource to enable users to configure configuration files in YAML format. The value of this configuration item is the key list of the key-value system. Multiple keys are separated by commas (,). The values of these keys are text content in YAML format. Spring Cloud Huawei performs special processing and parsing on the values of these keys.

After accessing the configuration center, you can use the @Value and @ConfigurationProperties labels to inject configurations for Spring Cloud applications. Alternatively, you can also use Environment to read configurations and @RefreshScope to dynamically change configurations. For details, see the developer guide of the community.

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