feat: c++ 对齐其他语言SDK (#33)

* feat: c++ 对齐其他语言SDK

1. 限流接口支持传入method
2. 去掉grpc以及动态权重调整的代码
3. 支持非二次寻址
4. 支持环境变量配置

* feat：修复用例失败问题

* feat: 默认地址导致用例失败问题

Author: andrewshan

.github/workflows/clang-format-check.yml

@@ -32,6 +32,10 @@ int main(int argc, char** argv) {
   // 建议将该配置放置在文件中，并通过如下方式创建consumer对象
   // polaris::ConsumerApi* consumer = polaris::ConsumerApi::CreateFromFile(config_file_path);
   std::string config =
+      "global:\n"
+      "  serverConnector:\n"
+      "    addresses:\n"
+      "    - 127.0.0.1:8091\n"
       "consumer:\n"
       "  loadBalancer:\n"
       "    type: ringHash\n"

examples/consumer/get_route_go_cst.cpp

@@ -44,6 +44,10 @@ int main(int argc, char** argv) {
   // 此处使用配置字符串开启set路由插件，建议将该配置放置在文件中，并通过如下方式创建consumer对象
   // polaris::ConsumerApi* consumer = polaris::ConsumerApi::CreateFromFile(config_file_path);
   std::string config =
+      "global:\n"
+      "  serverConnector:\n"
+      "    addresses:\n"
+      "    - 127.0.0.1:8091\n"
       "consumer:\n"
       "  serviceRouter:\n"
       "    chain:\n"

examples/consumer/get_route_with_set.cpp

@@ -44,6 +44,8 @@ int main(int argc, char** argv) {
   std::string err_msg, content =
                            "global:\n"
                            "  serverConnector:\n"
+                           "    addresses:\n"
+                           "    - 127.0.0.1:8091\n"                           
                            "consumer:\n"
                            "  healthCheck:\n"
                            "    when: always\n"

examples/consumer/health_check.cpp

@@ -0,0 +1,4 @@
+global:
+  serverConnector:
+    addresses:
+      - 127.0.0.1:8091

examples/consumer/polaris.yaml

@@ -0,0 +1,4 @@
+global:
+  serverConnector:
+    addresses:
+      - 127.0.0.1:8091

examples/fork/polaris.yaml

@@ -0,0 +1,4 @@
+global:
+  serverConnector:
+    addresses:
+      - 127.0.0.1:8091

examples/provider/polaris.yaml

@@ -0,0 +1,4 @@
+global:
+  serverConnector:
+    addresses:
+      - 127.0.0.1:8091

examples/quickstart/polaris.yaml

@@ -64,6 +64,9 @@ struct ServiceKey {
   std::string name_;
 };
 
+/// @brief 判断ServiceKey数据是否为空
+bool isEmpty(ServiceKey const &lhs);
+
 /// @brief 实现比较函数用于ServiceKey作为map的key
 bool operator<(ServiceKey const &lhs, ServiceKey const &rhs);