wzhangNJ commented on issue #4157:
URL: https://github.com/apache/shenyu/issues/4157#issuecomment-1305116006
shenyu的dubbo插件alibaba和apache 两个版本，
AlibabaDubboServiceBeanListener的onApplicationEvent方法
因为onApplicationEvent的这段代码导致了Map<String, ServiceBean> serviceBean =
contextRefreshedEvent.getApplicationContext().getBeansOfType(ServiceBean.class);可能加载不进来
```
if (!registered.compareAndSet(false, true)) {
return;
}
```
我查看你了alibaba和apache两个版本的区别，发现apache的代码逻辑判断更严谨些
shenyu apache dubbo
```
public void onApplicationEvent(final ContextRefreshedEvent
contextRefreshedEvent) {
// Fix bug(https://github.com/apache/shenyu/issues/415), upload
dubbo metadata on ContextRefreshedEvent
Map<String, ServiceBean> serviceBean =
contextRefreshedEvent.getApplicationContext().getBeansOfType(ServiceBean.class);
if (serviceBean.isEmpty()) {
return;
}
if (!registered.compareAndSet(false, true)) {
return;
}
for (Map.Entry<String, ServiceBean> entry : serviceBean.entrySet()) {
handler(entry.getValue());
}
serviceBean.values().stream().findFirst().ifPresent(bean -> {
publisher.publishEvent(buildURIRegisterDTO(bean));
});
}
```
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