异常抛出介绍及处理方式

1. AuboException 头文件

• 异常处理接口定义在type_def.h中

• type() 方法可以错误类型

• code() 方法可以返回错误码

• what() 方法可以返回错误信息

   enum error_type
      {
          parse_error = -32700,
          invalid_request = -32600,
          method_not_found = -32601,
          invalid_params = -32602,
          internal_error = -32603,
          server_error,
          invalid
      };
  
      class AuboException : public std::exception
      {
      public:
          AuboException(int code, const std::string &prefix,
                        const std::string &message) noexcept
              : code_(code), message_(prefix + "-" + message)
          {
          }
  
          AuboException(int code, const std::string &message) noexcept
              : code_(code), message_(message)
          {
          }
  
          error_type type() const
          {
              if (code_ >= -32603 && code_ <= -32600) {
                  return static_cast<error_type>(code_);
              } else if (code_ >= -32099 && code_ <= -32000) {
                  return server_error;
              } else if (code_ == -32700) {
                  return parse_error;
              }
              return invalid;
          }
  
          int code() const { return code_; }
          const char *what() const noexcept override { return message_.c_str(); }
  
      private:
          int code_;
          std::string message_;
      };
  

2. 处理方式

采用try{...}catch(){...}方式捕获异常，方式如下：

    try{
        ...//出现异常的代码
    }
    catch (const arcs::aubo_sdk::AuboException& e) {
        //打印异常信息
        std::cout << "An exception occurs: " << e.what() << std::endl; 
        //打印错误码
        std::cout << "Exception code: " << e.code() << std::endl;
        //打印异常类型
        std::cout << "Exception type: " << e.type() << std::endl;
    }

3. 示例

• 例如，填写一个错误的IP，SDK就会抛出异常

  #include "aubo_sdk/rpc.h"
  
  using namespace arcs::common_interface;
  using namespace arcs::aubo_sdk;
  
  int main(int argc, char** argv)
  {
      auto rpc_cli = std::make_shared<RpcClient>();
      try {
          //填写一个错误的IP 000.000.000.000
          std::string ip_local = "000.000.000.000";
          rpc_cli->connect(ip_local, 30004);
          rpc_cli->login("aubo", "123456");
      }
      catch (const arcs::aubo_sdk::AuboException& e) {
          std::cout << "An exception occurs: " << e.what() << std::endl;
          std::cout << "Exception code: " << e.code() << std::endl;
          std::cout << "Exception type: " << e.type() << std::endl;
      }
  }
  

• 运行结果