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前言：使用dubbo做为通信组件，如果接口需要鉴权，和日志记录需要怎样处理；

1 鉴权：

1.1 在bootstrap.yml 中定义过滤器：
dubbo.provider.filter: 过滤器的名字：

1.2 resources 目录下创建配置文件：
1） resources 创建目录：/META-INF/dubbo
2） 创建文件名字为org.apache.dubbo.rpc.Filter 的纯文本文件：

3） 定义过滤器：
过滤器名字=过滤器路径地址

4）服务提供端：DubboTokenFilter：

package org.lgx.bluegrass.bluegrasses.dubbofilter;import org.apache.dubbo.rpc.*;
import org.apache.dubbo.rpc.filter.TokenFilter;
import org.lgx.bluegrass.api.common.dto.ResponseDTO;
import org.lgx.bluegrass.bluegrasses.util.ApplicationContextUtils;
import org.lgx.bluegrass.bluegrasses.util.RedisUtil;
import org.springframework.util.StringUtils;/*** @Description TODO* @Date 2023/3/7 15:38* @Author lgx* @Version 1.0*/
public class DubboTokenFilter extends TokenFilter {private RedisUtil redisUtil;@Overridepublic Result invoke(Invoker<?> invoker, Invocation invocation) throws RpcException {String isNeedToken = invoker.getUrl().getParameter(Constants.TOKEN_KEY);// 是否需要进行token 验证if (StringUtils.hasText(isNeedToken)) {// 获取消费端传入的tokenString clientToken1 = invocation.getAttachment("dubbo_accesstoken");// 获取服务端的tokenString serverToken = getServerToken();//  token验证并且统一封装返回结果if (!serverToken.equals(clientToken1)) {// token 异常则直接封装ResponseDTO 并返回return AsyncRpcResult.newDefaultAsyncResult(ResponseDTO.defaultResponse("token illegal"), invocation);// 也可以抛出异常// Class<?> serviceType = invoker.getInterface();// throw new RpcException("Invalid token! Forbid invoke remote service " + serviceType + " method " + invocation.getMethodName() + "() from consumer " + RpcContext.getContext().getRemoteHost() + " to provider " + RpcContext.getContext().getLocalHost());}}return invoker.invoke(invocation);}// 从redis 中获取token 业务自行实现private String getServerToken() {if (null == redisUtil) {redisUtil = (RedisUtil) ApplicationContextUtils.getBean("redisUtil");}String accessToken = redisUtil.get("dubbo_accesstoken");return "1234";}
}

ResponseDTO 封装类：

// loomback 插件
@Data
@Accessors(chain = true)
public class ResponseDTO<T> implements Serializable {private static final long serialVersionUID = 3918877423924837166L;private int code = 200;private T body;private String msg;private boolean redirect = true;private List<ResponseMessage> messages;private List<String> message = new ArrayList<>();private int errNum;private String errorMsg;private Object errorObject;private boolean success = true;public static <T> ResponseDTO defaultResponse(T t) {return new ResponseDTO().setCode(BizHttpStatus.HTTP_STATUS_200.getStatus()).setBody(t);}
}

RedisUtil 封装类：stringRedisTemplate bean 自行配置实现

@Component
public class RedisUtil {@Autowired@Qualifier("stringRedisTemplate")private StringRedisTemplate redisTemplate;public void setRedisTemplate(StringRedisTemplate redisTemplate) {this.redisTemplate = redisTemplate;}public StringRedisTemplate getRedisTemplate() {return this.redisTemplate;}/*** 获取指定 key 的值** @param key* @return*/public String get(String key) {return redisTemplate.opsForValue().get(key);}/*** 设置指定 key 的值** @param key* @param value*/public void set(String key, String value) {redisTemplate.opsForValue().set(key, value);}
}

服务业务类提供者：
DubboTestServiceImpl：

import org.apache.dubbo.config.annotation.DubboService;
import org.lgx.bluegrass.api.common.dto.ResponseDTO;
import org.lgx.bluegrass.api.service.DubboTestService;/*** @Description TODO* @Date 2023/2/23 15:50* @Author lgx* @Version 1.0*/
// dubbo 服务暴露标识，token = "1234" 定义token验证标识
@DubboService(token = "1234")
public class DubboTestServiceImpl implements DubboTestService {@Overridepublic ResponseDTO test(String token) {return ResponseDTO.defaultResponse("hello es"+ token);}
}

服务定义：DubboThreeService：

public interface DubboThreeService {ResponseDTO testOne(String token);
}

5） 消费端：同服务提供端1），2）,3）,相同 ，定义好过滤器
定义消费端token 填充：
DubboTokenFilter

public class DubboTokenFilter implements Filter {private RedisUtil redisUtil;@Overridepublic Result invoke(Invoker<?> invoker, Invocation inv) throws RpcException {if (null == redisUtil) {Object obj = ApplicationContextUtils.getBean("redisUtil");if (null != obj){redisUtil = (RedisUtil) obj;}}String isNeedToken = invoker.getUrl().getParameter(Constants.TOKEN_KEY);// 是否需要进行token 验证if (StringUtils.hasText(isNeedToken)) {// Constants.TOKEN_KEY, "1234"， 便于跳过duboo 内置的token 验证// "1234" 对应服务提供端业务实现类中定义的token @DubboService(token = "1234")inv.setAttachment(Constants.TOKEN_KEY, "1234");// 设置本次真正需要验证的tokeninv.setAttachment("dubbo_accesstoken", "1234qazwsxedc");}// 远程接口调用return invoker.invoke(inv);}
}

6 ） 消费端测试：

@RestController
public class DubboRpcController {@DubboReferenceprivate DubboTestService  dubboTestService;@RequestMapping(value = "/dubbo-test", method = RequestMethod.GET)public String index(@RequestParam("token") String token) {return dubboTestService.test(token).toString();}
}

2 日志记录：

DubboAccessLogFilter：

import org.apache.dubbo.common.logger.Logger;
import org.apache.dubbo.common.logger.LoggerFactory;
import org.apache.dubbo.common.utils.ConfigUtils;
import org.apache.dubbo.rpc.*;
import org.apache.dubbo.rpc.support.AccessLogData;import java.util.Date;/*** @Description TODO* @Date 2023/3/8 16:48* @Author lgx* @Version 1.0*/
public class DubboAccessLogFilter implements Filter {private static final Logger logger = LoggerFactory.getLogger(DubboAccessLogFilter.class);@Overridepublic Result invoke(Invoker<?> invoker, Invocation inv) throws RpcException {try {// 是否需要对改接口进行日志记录String accessLogKey = invoker.getUrl().getParameter("accesslog");if (ConfigUtils.isNotEmpty(accessLogKey)) {// 请求的数据AccessLogData logData = this.buildAccessLogData(invoker, inv);// save logsaveLog(logData);}} catch (Throwable var5) {logger.warn("Exception in AccessLogFilter of service(" + invoker + " -> " + inv + ")", var5);}return invoker.invoke(inv);}// 自行实现数据的保存private void saveLog(AccessLogData logData) {}private AccessLogData buildAccessLogData(Invoker<?> invoker, Invocation inv) {AccessLogData logData = AccessLogData.newLogData();logData.setServiceName(invoker.getInterface().getName());logData.setMethodName(inv.getMethodName());logData.setVersion(invoker.getUrl().getParameter("version"));logData.setGroup(invoker.getUrl().getParameter("group"));logData.setInvocationTime(new Date());logData.setTypes(inv.getParameterTypes());logData.setArguments(inv.getArguments());return logData;}
}

服务业务提供端：

// accesslog  日志记录标识
@DubboService(accesslog = "123")
public class DubboTestServiceTwoImpl implements DubboTestTwoService {@Overridepublic ResponseDTO sayHello() {Map<String,Object> result = new HashMap<>(1<<2);result.put("data","Hello !");result.put("success",true);result.put("code",200);return ResponseDTO.defaultResponse(result);}
}

3 数据统一封装：

AppendedFilter:

import org.apache.dubbo.rpc.*;
import org.lgx.bluegrass.api.common.dto.ResponseDTO;/*** @Description TODO* @Date 2023/3/7 11:00* @Author lgx* @Version 1.0*/
public class AppendedFilter implements Filter {@Overridepublic Result invoke(Invoker<?> invoker, Invocation invocation) throws RpcException {Result result = invoker.invoke(invocation);Result appResponse = ((AsyncRpcResult) result).getAppResponse();Object data = appResponse.getValue();if (data instanceof ResponseDTO) {return result;}// 统一进行ResponseDTO 格式数据封装返回appResponse.setValue(ResponseDTO.defaultResponse(data));return result;}
}

参考：
1 调用拦截扩展；