[coro_io] rename channel to load_blancer, rename coro_channel to channel

BUILD.bazel

@@ -71,8 +71,8 @@ cc_binary(
 )
 
 cc_binary(
-    name = "coro_http_channel",
-    srcs = ["src/coro_http/examples/channel.cpp"],
+    name = "coro_http_load_blancer",
+    srcs = ["src/coro_http/examples/load_blancer.cpp"],
     copts = YA_BIN_COPT,
     includes = [
         "include",

include/ylt/coro_io/client_pool.hpp

@@ -55,7 +55,7 @@ template <typename client_t, typename io_context_pool_t>
 class client_pools;
 
 template <typename, typename>
-class channel;
+class load_blancer;
 
 template <typename client_t,
           typename io_context_pool_t = coro_io::io_context_pool>
@@ -405,7 +405,7 @@ class client_pool : public std::enable_shared_from_this<
   friend class client_pools;
 
   template <typename, typename>
-  friend class channel;
+  friend class load_blancer;
 
   template <typename T>
   async_simple::coro::Lazy<return_type_with_host<T>> send_request(

include/ylt/coro_io/coro_io.hpp

@@ -364,12 +364,11 @@ post(Func func,
 }
 
 template <typename R>
-struct coro_channel
-    : public asio::experimental::channel<void(std::error_code, R)> {
+struct channel : public asio::experimental::channel<void(std::error_code, R)> {
   using return_type = R;
   using ValueType = std::pair<std::error_code, R>;
   using asio::experimental::channel<void(std::error_code, R)>::channel;
-  coro_channel(coro_io::ExecutorWrapper<> *executor, size_t capacity)
+  channel(coro_io::ExecutorWrapper<> *executor, size_t capacity)
       : executor_(executor),
         asio::experimental::channel<void(std::error_code, R)>(
             executor->get_asio_executor(), capacity) {}
@@ -380,17 +379,17 @@ struct coro_channel
 };
 
 template <typename R>
-inline coro_channel<R> create_channel(
+inline channel<R> create_load_blancer(
     size_t capacity,
     coro_io::ExecutorWrapper<> *executor = coro_io::get_global_executor()) {
-  return coro_channel<R>(executor, capacity);
+  return channel<R>(executor, capacity);
 }
 
 template <typename R>
 inline auto create_shared_channel(
     size_t capacity,
     coro_io::ExecutorWrapper<> *executor = coro_io::get_global_executor()) {
-  return std::make_shared<coro_channel<R>>(executor, capacity);
+  return std::make_shared<channel<R>>(executor, capacity);
 }
 
 template <typename T>

include/ylt/coro_io/channel.hpp → include/ylt/coro_io/load_blancer.hpp

@@ -25,32 +25,33 @@
 #include "io_context_pool.hpp"
 namespace coro_io {
 
-enum class load_blance_algorithm {
+enum class load_blancer_algorithm {
   RR = 0,  // round-robin
   WRR,     // weight round-robin
   random,
 };
 
 template <typename client_t, typename io_context_pool_t = io_context_pool>
-class channel {
+class load_blancer {
   using client_pool_t = client_pool<client_t, io_context_pool_t>;
   using client_pools_t = client_pools<client_t, io_context_pool_t>;
 
  public:
-  struct channel_config {
+  struct load_blancer_config {
     typename client_pool_t::pool_config pool_config;
-    load_blance_algorithm lba = load_blance_algorithm::RR;
-    ~channel_config(){};
+    load_blancer_algorithm lba = load_blancer_algorithm::RR;
+    ~load_blancer_config(){};
   };
 
  private:
   struct RRLoadBlancer {
     std::unique_ptr<std::atomic<uint32_t>> index =
         std::make_unique<std::atomic<uint32_t>>();
     async_simple::coro::Lazy<std::shared_ptr<client_pool_t>> operator()(
-        const channel& channel) {
+        const load_blancer& load_blancer) {
       auto i = index->fetch_add(1, std::memory_order_relaxed);
-      co_return channel.client_pools_[i % channel.client_pools_.size()];
+      co_return load_blancer
+          .client_pools_[i % load_blancer.client_pools_.size()];
     }
   };
 
@@ -84,14 +85,15 @@ class channel {
     }
 
     async_simple::coro::Lazy<std::shared_ptr<client_pool_t>> operator()(
-        const channel& channel) {
+        const load_blancer& load_blancer) {
       int selected = select_host_with_weight_round_robin();
       if (selected == -1) {
         selected = 0;
       }
 
       wrr_current_ = selected;
-      co_return channel.client_pools_[selected % channel.client_pools_.size()];
+      co_return load_blancer
+          .client_pools_[selected % load_blancer.client_pools_.size()];
     }
 
    private:
@@ -138,27 +140,27 @@ class channel {
 
   struct RandomLoadBlancer {
     async_simple::coro::Lazy<std::shared_ptr<client_pool_t>> operator()(
-        const channel& channel) {
+        const load_blancer& load_blancer) {
       static thread_local std::default_random_engine e(std::time(nullptr));
       std::uniform_int_distribution rnd{std::size_t{0},
-                                        channel.client_pools_.size() - 1};
-      co_return channel.client_pools_[rnd(e)];
+                                        load_blancer.client_pools_.size() - 1};
+      co_return load_blancer.client_pools_[rnd(e)];
     }
   };
-  channel() = default;
+  load_blancer() = default;
 
  public:
-  channel(channel&& o)
+  load_blancer(load_blancer&& o)
       : config_(std::move(o.config_)),
         lb_worker(std::move(o.lb_worker)),
         client_pools_(std::move(o.client_pools_)){};
-  channel& operator=(channel&& o) {
+  load_blancer& operator=(load_blancer&& o) {
     this->config_ = std::move(o.config_);
     this->lb_worker = std::move(o.lb_worker);
     this->client_pools_ = std::move(o.client_pools_);
   }
-  channel(const channel& o) = delete;
-  channel& operator=(const channel& o) = delete;
+  load_blancer(const load_blancer& o) = delete;
+  load_blancer& operator=(const load_blancer& o) = delete;
 
   auto send_request(auto op, typename client_t::config& config)
       -> decltype(std::declval<client_pool_t>().send_request(std::move(op),
@@ -185,37 +187,38 @@ class channel {
     return send_request(std::move(op), config_.pool_config.client_config);
   }
 
-  static channel create(const std::vector<std::string_view>& hosts,
-                        const channel_config& config = {},
-                        const std::vector<int>& weights = {},
-                        client_pools_t& client_pools =
-                            g_clients_pool<client_t, io_context_pool_t>()) {
-    channel ch;
+  static load_blancer create(
+      const std::vector<std::string_view>& hosts,
+      const load_blancer_config& config = {},
+      const std::vector<int>& weights = {},
+      client_pools_t& client_pools =
+          g_clients_pool<client_t, io_context_pool_t>()) {
+    load_blancer ch;
     ch.init(hosts, config, weights, client_pools);
     return ch;
   }
 
   /**
-   * @brief return the channel's hosts size.
+   * @brief return the load_blancer's hosts size.
    *
    * @return std::size_t
    */
   std::size_t size() const noexcept { return client_pools_.size(); }
 
  private:
   void init(const std::vector<std::string_view>& hosts,
-            const channel_config& config, const std::vector<int>& weights,
+            const load_blancer_config& config, const std::vector<int>& weights,
             client_pools_t& client_pools) {
     config_ = config;
     client_pools_.reserve(hosts.size());
     for (auto& host : hosts) {
       client_pools_.emplace_back(client_pools.at(host, config.pool_config));
     }
     switch (config_.lba) {
-      case load_blance_algorithm::RR:
+      case load_blancer_algorithm::RR:
         lb_worker = RRLoadBlancer{};
         break;
-      case load_blance_algorithm::WRR: {
+      case load_blancer_algorithm::WRR: {
         if (hosts.empty() || weights.empty()) {
           throw std::invalid_argument("host/weight list is empty!");
         }
@@ -224,13 +227,13 @@ class channel {
         }
         lb_worker = WRRLoadBlancer(weights);
       } break;
-      case load_blance_algorithm::random:
+      case load_blancer_algorithm::random:
       default:
         lb_worker = RandomLoadBlancer{};
     }
     return;
   }
-  channel_config config_;
+  load_blancer_config config_;
   std::variant<RRLoadBlancer, WRRLoadBlancer, RandomLoadBlancer> lb_worker;
   std::vector<std::shared_ptr<client_pool_t>> client_pools_;
 };

include/ylt/standalone/cinatra/coro_http_server.hpp

@@ -7,10 +7,10 @@
 #include "cinatra/mime_types.hpp"
 #include "cinatra_log_wrapper.hpp"
 #include "coro_http_connection.hpp"
-#include "ylt/coro_io/channel.hpp"
 #include "ylt/coro_io/coro_file.hpp"
 #include "ylt/coro_io/coro_io.hpp"
 #include "ylt/coro_io/io_context_pool.hpp"
+#include "ylt/coro_io/load_blancer.hpp"
 #include "ylt/metric/system_metric.hpp"
 
 namespace cinatra {
@@ -208,22 +208,23 @@ class coro_http_server {
   template <http_method... method, typename... Aspects>
   void set_http_proxy_handler(std::string url_path,
                               std::vector<std::string_view> hosts,
-                              coro_io::load_blance_algorithm type =
-                                  coro_io::load_blance_algorithm::random,
+                              coro_io::load_blancer_algorithm type =
+                                  coro_io::load_blancer_algorithm::random,
                               std::vector<int> weights = {},
                               Aspects &&...aspects) {
     if (hosts.empty()) {
       throw std::invalid_argument("not config hosts yet!");
     }
 
-    auto channel = std::make_shared<coro_io::channel<coro_http_client>>(
-        coro_io::channel<coro_http_client>::create(hosts, {.lba = type},
-                                                   weights));
+    auto load_blancer =
+        std::make_shared<coro_io::load_blancer<coro_http_client>>(
+            coro_io::load_blancer<coro_http_client>::create(
+                hosts, {.lba = type}, weights));
     auto handler =
-        [this, channel, type](
+        [this, load_blancer, type](
             coro_http_request &req,
             coro_http_response &response) -> async_simple::coro::Lazy<void> {
-      co_await channel->send_request(
+      co_await load_blancer->send_request(
           [this, &req, &response](
               coro_http_client &client,
               std::string_view host) -> async_simple::coro::Lazy<void> {
@@ -247,22 +248,23 @@ class coro_http_server {
   template <http_method... method, typename... Aspects>
   void set_websocket_proxy_handler(std::string url_path,
                                    std::vector<std::string_view> hosts,
-                                   coro_io::load_blance_algorithm type =
-                                       coro_io::load_blance_algorithm::random,
+                                   coro_io::load_blancer_algorithm type =
+                                       coro_io::load_blancer_algorithm::random,
                                    std::vector<int> weights = {},
                                    Aspects &&...aspects) {
     if (hosts.empty()) {
       throw std::invalid_argument("not config hosts yet!");
     }
 
-    auto channel = std::make_shared<coro_io::channel<coro_http_client>>(
-        coro_io::channel<coro_http_client>::create(hosts, {.lba = type},
-                                                   weights));
+    auto load_blancer =
+        std::make_shared<coro_io::load_blancer<coro_http_client>>(
+            coro_io::load_blancer<coro_http_client>::create(
+                hosts, {.lba = type}, weights));
 
     set_http_handler<cinatra::GET>(
         url_path,
-        [channel](coro_http_request &req,
-                  coro_http_response &resp) -> async_simple::coro::Lazy<void> {
+        [load_blancer](coro_http_request &req, coro_http_response &resp)
+            -> async_simple::coro::Lazy<void> {
           websocket_result result{};
           while (true) {
             result = co_await req.get_conn()->read_websocket();
@@ -275,7 +277,7 @@ class coro_http_server {
               break;
             }
 
-            co_await channel->send_request(
+            co_await load_blancer->send_request(
                 [&req, result](
                     coro_http_client &client,
                     std::string_view host) -> async_simple::coro::Lazy<void> {

src/coro_http/examples/CMakeLists.txt

@@ -28,11 +28,11 @@ else()
 endif()
 
 add_executable(coro_http_example example.cpp)
-add_executable(coro_http_channel channel.cpp)
+add_executable(coro_http_load_blancer load_blancer.cpp)
 add_executable(coro_chat_room chat_room.cpp)
 
 if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND CMAKE_SYSTEM_NAME MATCHES "Windows") # mingw-w64
     target_link_libraries(coro_http_example wsock32 ws2_32)
-    target_link_libraries(coro_http_channel wsock32 ws2_32)
+    target_link_libraries(coro_http_load_blancer wsock32 ws2_32)
     target_link_libraries(coro_chat_room wsock32 ws2_32)
 endif()

src/coro_http/examples/example.cpp

@@ -17,6 +17,7 @@
 
 #include "ylt/coro_http/coro_http_client.hpp"
 #include "ylt/coro_http/coro_http_server.hpp"
+#include "ylt/coro_io/coro_io.hpp"
 
 using namespace std::chrono_literals;
 using namespace coro_http;
@@ -569,12 +570,12 @@ void http_proxy() {
   coro_http_server proxy_wrr(2, 8090);
   proxy_wrr.set_http_proxy_handler<GET, POST>(
       "/", {"127.0.0.1:9001", "127.0.0.1:9002", "127.0.0.1:9003"},
-      coro_io::load_blance_algorithm::WRR, {10, 5, 5});
+      coro_io::load_blancer_algorithm::WRR, {10, 5, 5});
 
   coro_http_server proxy_rr(2, 8091);
   proxy_rr.set_http_proxy_handler<GET, POST>(
       "/", {"127.0.0.1:9001", "127.0.0.1:9002", "127.0.0.1:9003"},
-      coro_io::load_blance_algorithm::RR);
+      coro_io::load_blancer_algorithm::RR);
 
   coro_http_server proxy_random(2, 8092);
   proxy_random.set_http_proxy_handler<GET, POST>(
@@ -628,8 +629,8 @@ void http_proxy() {
   assert(!resp_random.resp_body.empty());
 }
 
-void coro_channel() {
-  auto ch = coro_io::create_channel<int>(10000);
+void coro_load_blancer() {
+  auto ch = coro_io::create_load_blancer<int>(10000);
   auto ec = async_simple::coro::syncAwait(coro_io::async_send(ch, 41));
   assert(!ec);
   ec = async_simple::coro::syncAwait(coro_io::async_send(ch, 42));
@@ -660,6 +661,6 @@ int main() {
   test_gzip();
 #endif
   http_proxy();
-  coro_channel();
+  coro_load_blancer();
   return 0;
 }