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Posted to commits@servicecomb.apache.org by "Aithosa (via GitHub)" <gi...@apache.org> on 2025/02/10 18:08:33 UTC
[I] 关于动态配置读取 [servicecomb-java-chassis]
Aithosa opened a new issue, #4714:
URL: https://github.com/apache/servicecomb-java-chassis/issues/4714
我注意到`3.x`版本把原本完全使用`archaius API`读取配置的部分全部换掉了，在`DynamicPropertiesImpl`中通过`Environment`来读取配置，这是为什么，为了更接入Spring原生的操作吗？
然后我按照文档[在程序中读取配置信息](https://servicecomb.apache.org/references/java-chassis/zh_CN/config/read-config.html)试了下，使用`dynamicProperties.getStringProperty()`无法读到配置的变化，然后我看了下`[servicecomb-java-chassis](https://github.com/apache/servicecomb-java-chassis)`的测试:
```java
HashMap<String, Object> updated = new HashMap<>();
updated.put(stringPropertyName, newValue);
EventManager.post(ConfigurationChangedEvent.createIncremental(updated));
```
运行没有问题，但是按照文档那样以非mock的方式测试就读不到配置的变化，请问是有什么遗漏的额外配置吗？我测试时用的是基于[开发第一个微服务应用](https://servicecomb.apache.org/references/java-chassis/zh_CN/start/first-sample.html)里bmi那个示例改写的。
```Java
@RestSchema(schemaId = "ProviderController")
@RequestMapping(path = "/provider")
public class ProviderController {
private DynamicProperties dynamicProperties;
@Autowired
private Environment environment;
private String example;
@Autowired
public ProviderController(DynamicProperties dynamicProperties) {
this.dynamicProperties = dynamicProperties;
// 在构造函数中注册回调，这样配置变化时会自动更新 example 值
this.example = this.dynamicProperties.getStringProperty("basic.example",
value -> {
System.out.println("Configuration changed, new value: " + value);
this.example = value;
}, "not set");
}
@GetMapping(path = "/example")
public String getExampleValue() {
String dynamicValue = dynamicProperties.getStringProperty("basic.example", "not set");
String envValue = environment.getProperty("basic.example", "not set");
System.out.println("Dynamic value: " + dynamicValue);
System.out.println("Environment value: " + envValue);
return example;
}
}
```
不管是用 `dynamicProperties` 还是 `environment` 都读不到变化。
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Re: [I] 关于动态配置读取 [servicecomb-java-chassis]
Posted by "Aithosa (via GitHub)" <gi...@apache.org>.
Aithosa commented on issue #4714:
URL: https://github.com/apache/servicecomb-java-chassis/issues/4714#issuecomment-2649741847
我链接配置中心试了下在上面修改配置可以动态读取了。
不过`DynamicProperties`不能像archaius一样读取配置中心以外配置文件的变化吗？
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Re: [I] 关于动态配置读取 [servicecomb-java-chassis]
Posted by "liubao68 (via GitHub)" <gi...@apache.org>.
liubao68 commented on issue #4714:
URL: https://github.com/apache/servicecomb-java-chassis/issues/4714#issuecomment-2650644041
你参考配置中心的扩展或者DEMO的示例代码，写一个监听配置文件变化的source即可。
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Re: [I] 关于动态配置读取 [servicecomb-java-chassis]
Posted by "liubao68 (via GitHub)" <gi...@apache.org>.
liubao68 commented on issue #4714:
URL: https://github.com/apache/servicecomb-java-chassis/issues/4714#issuecomment-2649616089
你连接配置中心就可以了。测试代码是经过特殊处理的，新增了一个基于内存的配置中心。
删除archaius等组件主要原因是这些组件停止维护和演进了，影响未来演进，用了新的方式替换，参考： https://servicecomb.apache.org/references/java-chassis/zh_CN/introduce3.x.x.html 。
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