如何在微服务中访问一个application.properties

Question

how is the file application.properties handled in microservices? Is there a way to have one global application.properties file that all microservices can access?

Answer 1

Application.properties or Application.yaml used for loading the configuration on startup and inject the property value in variable. Like keyStorePath variable will be injected with value defined in properties file.

Java Code

@Value("${java.keystore.path}")
    private String keyStorePath; 

application.properties

java:
 keystore:
  path: /KeyStore.jks

Yes, You can use centralized configurations that can be used by all microservice, Create Config Server annoted with @EnableConfigServer that will hold configurations for all microservice(instead of local application.properties all microservice on start will come to config server for configuration just we need to provide config server url so that microservices can communicate with config server on startup and have required data).

Config Server Main Class

@SpringBootApplication
@EnableConfigServer
@ComponentScan(basePackages = {"com.abc.*"})
public class ConfigApplication {

    public static void main(String[] args) {
        SpringApplication.run(ConfigApplication.class, args);
    }
}

Property file in config Server

 java:
     keystore:
      path: /KeyStore.jks

Property File in Microservice that will hold the url of Config Server

# MicroServices Properties
spring:
  application:
     name: Microservice1
  profiles:
    active: rds
  cloud:
    config:
      uri: http://localhost:8888
      fail-fast: true
      password: test@123
      username: user