spring boot @refreshscope 不更新数据源 [英] spring boot @refreshscope doesn't update datasource

问题描述

如果 DB.URL 的环境变量发生变化，我将尝试更新 DB 数据源.下面是我的课，

I am trying to update DB datasource if the environment variable for DB.URL changes. Below is my class,

@SpringBootApplication
@ConfigurationProperties(value="myapp")
public class MyApp {
@Value("${myapp.db.url}")
String databaseURL;

@Value("${myapp.db.username}")
String databaseUsername;

@Value("${myapp.db.password}")
String databasePassword;

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

@Bean
@RefreshScope
@Primary
public DataSource getDataSource() {
    return DataSourceBuilder.create().username(databaseUsername).password(databasePassword).url(databaseURL)
            .driverClassName("org.postgresql.Driver").build();
}
}

但是当我更新环境 DB.URL 时，它不会向新数据库发出请求.

But when I update environment DB.URL it doesn't make request to new DB.

我参考了文档，因为可以更新数据源，http://projects.spring.io/spring-cloud/spring-cloud.html#_refresh_scope

I have referred the documentation as it is possible to update datasource, http://projects.spring.io/spring-cloud/spring-cloud.html#_refresh_scope

我的班级缺少什么?

推荐答案

如果将 @RefreshScope 添加到类而不从方法中删除.然后 @Value 变量将被刷新.并且数据源会改变.

If you add @RefreshScope to class without removing from method. Then @Value variables will be refreshed. And datasource will change.

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