任务

跑通sofa插件，研究sofa协议实现原理

sofa + nacos

启动 admin 后，更改 sofa 插件的配置和状态。

image.png

启动网关。然后更改 sofa 的注册中心信息，启动 sofa 的例子。

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com:
  alipay:
    sofa:
      rpc:
        registry-address: nacos://127.0.0.1:8848

发起请求：/sofa/findById，报空指针异常：

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java.lang.NullPointerException: null
	at org.dromara.soul.plugin.sofa.proxy.SofaProxyService.genericInvoker(SofaProxyService.java:81)

追溯空指针的原因，可以看到原因大概是，SofaProxyService中没有成功注入sofaParamResolveService的bean，而注入操作是在SofaPluginConfiguration的配置中完成的。

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public class SofaProxyService {

    private final SofaParamResolveService sofaParamResolveService;
    
    public SofaProxyService(final SofaParamResolveService sofaParamResolveService) {
        this.sofaParamResolveService = sofaParamResolveService;
    }
    ...
}
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@Configuration
@ConditionalOnClass(SofaPlugin.class)
public class SofaPluginConfiguration {
    @Bean
    public SoulPlugin sofaPlugin(final ObjectProvider<SofaParamResolveService> sofaParamResolveService) {
        return new SofaPlugin(new SofaProxyService(sofaParamResolveService.getIfAvailable()));
    }
    ...
}

研究了好一会，没发现原因，明天继续…