Integrate asynco in library, optimize maintenance on both engine

.vscode/settings.json

@@ -61,6 +61,8 @@
         "cinttypes": "cpp",
         "typeinfo": "cpp",
         "any": "cpp",
-        "variant": "cpp"
+        "variant": "cpp",
+        "*.ipp": "cpp",
+        "bitset": "cpp"
     }
 }

README.md

@@ -13,7 +13,7 @@ A small framework for basic MySQL database operations via MySQL/Connector++
 - Response object
 - Thread safe
 - Exceptions and log error callback
-- Can use external time loop for connection management
+- Support my Asynco wrapper around Boost ASIO and support threads
 
 ## Installation
 
@@ -22,6 +22,11 @@ First install dependency MySQL/Connector++
 ```
 sudo apt install libmysqlcppconn-dev
 ```
+If you are going to use with an Asynco wrapper, download the archive from the profile and install the Boost dependencies
+
+```
+sudo apt install libboost-all-dev
+```
 
 Just download the latest release and unzip it into your project. You can turn it on with:
 
@@ -29,7 +34,15 @@ Just download the latest release and unzip it into your project. You can turn it
 #include "mysql/lib/mysql.hpp"
 using namespace marcelb;
 ```
+Compiling
+
+```
+# use with my Asynco lib
+g++ -DMYSQL_USE_ASYNCO test.cpp ../src/* ../../asynco/src/* -o test.o -lmysqlcppconn -lpthread
 
+# or use without asnyco (in multithread)
+g++ test.cpp ../src/* ../../asynco/src/* -o test.o -lmysqlcppconn -lpthread
+```
 ## Usage
 
 ### Internal engine
@@ -46,6 +59,14 @@ using namespace marcelb::mysql;
 */
 MySQL mydb("tcp://192.168.2.10:3306", "user_nm", "passss", "my_db", 5);
 
+mydb.on_error = [](const string& error) {
+    cout << error << endl;
+};
+
+mydb.on_connect = []() {
+    cout << "Init all pool connection done" << endl;
+};
+
 /**
 * Use                                 ------------------              
 */                                   |                  |    
@@ -72,34 +93,16 @@ try {                           |    |              |   |
 }
 ```
 
-### External engine
+### Run async with Asynco
 
 As I developed quite a few wrappers that have some internal thread, I realized that it was inefficient and made it possible to call the necessary functions periodically outside (one thread per whole application or timer (ASIO), or my asynco wrapper).
 
 ```c++
-#include "../lib/mysql.hpp"
-using namespace marcelb::mysql;
-
-#include "../../asynco/lib/timers.hpp"
-using namespace marcelb::asynco;
-/**
-* Init
-*/
-MySQL mydb("tcp://192.168.2.10:3306", "user_nm", "passss", "my_db", 5, time_loop_type::external);
-
-periodic mysql_maintenance ( [&mydb] () {
-    mydb.periodic_maintenance();
-}, MYSQL_PERIODIC_INTERNAL_TIME);
-
-mydb.set_on_error( [](const string& error) {
-    cout << error << endl;  // print or log
-});
-
 /**
 * You can call multiple queries asynchronously                                     
 */                              
                                 
-auto a1 = atask ( [&mydb] () {
+auto a1 = async_ ( [&mydb] () {
     try {
         auto response =  mydb.exec<int,string>("SELECT id,domain FROM records WHERE enabled = 1;");
         for (auto row : response) {
@@ -110,7 +113,7 @@ auto a1 = atask ( [&mydb] () {
     }
 });
 
-auto a2 = atask ( [&mydb] () {
+auto a2 = async_ ( [&mydb] () {
     try {
         auto response =  mydb.exec<string,string>("SELECT zonename,auth_key FROM zones;");
         for (auto row : response) {
@@ -121,7 +124,7 @@ auto a2 = atask ( [&mydb] () {
     }
 });
 
-auto a3 = atask ( [&mydb] () {
+auto a3 = async_ ( [&mydb] () {
     try {
         auto response =  mydb.exec<string,string>("SELECT username,email FROM users WHERE enabled = 1;");
         for (auto row : response) {
@@ -132,9 +135,9 @@ auto a3 = atask ( [&mydb] () {
     }
 });
 
-wait(a1);
-wait(a2);
-wait(a3);
+await(a1);
+await(a2);
+await(a3);
 ```
 
 ## License

lib/mysql.hpp

@@ -8,7 +8,6 @@
 #include <string>
 #include <vector>
 #include <tuple>
-#include <ctime>
 #include <chrono>
 using namespace std;
 
@@ -39,6 +38,8 @@ namespace mysql {
  * 
 */
 #define MYSQL_PERIODIC_INTERNAL_TIME 5000
+#define MYSQL_MAX_CONNECTION_INIT_SAME_TIME 10
+#define MYSQL_DELAYED_CONNECT_TIME 1000
 
 /**
  * A class for creating sql responses
@@ -99,13 +100,16 @@ class MySQL {
     queue<Connection*> connection_pool;
     string path, username, password, database;
     uint32_t pool_size;
-    bool run_tloop = true;
+    const uint32_t max_t = thread::hardware_concurrency();
+    uint32_t t = 1;
 #ifdef MYSQL_USE_ASYNCO
     periodic p_loop;
+    // delayed d_connect;
 #else 
-    future<void> tloop_future;
+    future<void> tloop_future, connect_f;
+    bool run_tloop = true;
+
 #endif
-    time_t last_loop_time;
     
     /**
      * Open one database server connection
@@ -154,8 +158,57 @@ class MySQL {
 
     void _tloop(uint32_t b, uint32_t e);
 
+    /**
+     * 
+     */
+
+    vector<pair<int, int>> divide_and_conquer(int n, int t) {
+        vector<pair<int, int>> pairs;
+        int part_size = n / t;
+        int residue = n % t; // Ostatak koji treba rasporediti
+
+        for (int i = 0; i < t; i++) {
+            int start = i * part_size + std::min(i, residue);
+            int end = start + part_size + (i < residue ? 1 : 0);
+            pairs.push_back(make_pair(start, end));
+        }
+        return pairs;
+    }
+
+    /**
+     * Automatically adjusts
+     */
+
+    void auto_adjusts(const uint32_t duration) {
+        if (duration > (MYSQL_PERIODIC_INTERNAL_TIME*2)/3) {
+            if (t < max_t) {
+               t++;     // povećaj broj asinkronih zadataka drugi put
+            }
+
+            else if (on_error) {
+               on_error("Periodic maintenance takes too long");
+            }
+        }
+        
+        else if (duration < MYSQL_PERIODIC_INTERNAL_TIME/3 && t > 1) {
+            t--;     // smanji nema potrebe
+        }
+    }
+
+#ifndef MYSQL_USE_ASYNCO
+    /**
+     * 
+     */
+    uint64_t timestamp() {
+        return chrono::duration_cast<chrono::milliseconds>(
+            chrono::system_clock::now().time_since_epoch()
+        ).count();
+    };
+#endif
+
 public:
     function<void(const string&)> on_error;
+    function<void()> on_connect;
     uint32_t connect_trys = 3;
 
 
@@ -206,13 +259,12 @@ public:
             release_connection(connection);
         } catch (sql::SQLException& e) {
             throw runtime_error(e.what());
-            // std::cerr << "SQLState: " << e.getSQLState() << std::endl;
-            // std::cerr << "Error code: " << e.getErrorCode() << std::endl;
+            // cerr << "SQLState: " << e.getSQLState() << endl;
+            // cerr << "Error code: " << e.getErrorCode() << endl;
         }
         return result;
     }
 
-
     /**
      * Destruktor
      * close all connections

src/mysql.cpp

@@ -3,24 +3,55 @@
 marcelb::mysql::MySQL::MySQL(const string _path, const string _username, const string _password, const string _db, const uint32_t _available):
 #ifdef MYSQL_USE_ASYNCO
    p_loop(periodic( [&] () {
-      cout << "U asynco" << endl;
-      try {
-         auto start = rtime_ms();
-         _tloop(0, connection_pool.size());
-         cout << "loop--------------------------- nema error, trajalo: " << rtime_ms() - start << endl;
-      } catch (...) {
-         // cout << "Bude neki error u loopu" << endl;
-         if(on_error) {
-            on_error("Bude neki error u loopu");
+      const uint64_t start = rtime_ms();
+      auto pairs = divide_and_conquer(connection_pool.size(), t);
+
+      vector<future<void>> fuve;
+      for (auto& pair : pairs) {
+         fuve.push_back(async_ ([&, pair](){
+            _tloop(pair.first, pair.second);
+         }));
+      }
+
+      for (auto& fu : fuve) {
+         try {
+            await_(fu);
+         } catch (...) {
+            if(on_error) {
+               on_error("Error in maintenance periodic loop.");
+            }
          }
       }
+      
+      auto_adjusts(rtime_ms() - start);
+
    }, MYSQL_PERIODIC_INTERNAL_TIME)),
 #else 
    tloop_future (async(launch::async, [&](){
       while (run_tloop) {
-         cout << "U STD async" << endl;
          usleep(MYSQL_PERIODIC_INTERNAL_TIME*1000);
-         _tloop(0, connection_pool.size());
+
+         const uint64_t start = timestamp();
+         auto pairs = divide_and_conquer(connection_pool.size(), t);
+
+         vector<future<void>> fuve;
+         for (auto& pair : pairs) {
+            fuve.push_back(async (launch::async, [&, pair](){
+               _tloop(pair.first, pair.second);
+            }));
+         }
+
+         for (auto& fu : fuve) {
+            try {
+               fu.get();
+            } catch (...) {
+               if(on_error) {
+                  on_error("Error in maintenance periodic loop.");
+               }
+            }
+         }
+
+         auto_adjusts(timestamp() - start);
       }
       return;
    })),
@@ -33,9 +64,6 @@ marcelb::mysql::MySQL::MySQL(const string _path, const string _username, const s
    
    drv = get_mysql_driver_instance();
    connect_pool();
-
-   // set on initialization to avoid the error
-   last_loop_time = time(nullptr);
 }
 
 
@@ -68,11 +96,28 @@ Connection* marcelb::mysql::MySQL::create_connection() {
 }
 
 void marcelb::mysql::MySQL::connect_pool() {
-   lock_guard<mutex> lock(io);
-   for (uint32_t i=0; i<pool_size; i++) {
-      Connection* connection = create_connection();
-      connection_pool.push(connection);
-   }
+   auto connect_ = [&]() -> void {
+      const uint32_t tens = pool_size/MYSQL_MAX_CONNECTION_INIT_SAME_TIME;
+      for (uint32_t i=0; i<pool_size; i++) {
+         Connection* connection = create_connection();
+         {  
+            lock_guard<mutex> lock(io);
+            connection_pool.push(connection);
+         }
+         if ((i+1)%tens == 0) {
+            usleep(MYSQL_DELAYED_CONNECT_TIME*1000);
+         }
+      }
+      if (on_connect) {
+         on_connect();
+      }
+   };
+
+#ifdef MYSQL_USE_ASYNCO
+   async_ (connect_);
+#else 
+   connect_f = async (launch::async, connect_);
+#endif
 }
 
 void marcelb::mysql::MySQL::disconnect_pool() {
@@ -108,35 +153,18 @@ bool marcelb::mysql::MySQL::disconnect_connection(Connection* connection) {
 }
 
 void marcelb::mysql::MySQL::_tloop(uint32_t b, uint32_t e) {
-   if (!run_tloop) {
-      return;
-   }
    for (size_t i=b; i<connection_pool.size() && i<e; i++) {
       try {
-         Connection *conn = nullptr;
-         {
-            lock_guard<mutex> lock(io);
-            conn = connection_pool.front();
-            connection_pool.pop();
-         }
+         Connection *conn = nullptr;      // provjeri ovdje svugdje možeš li koristiti release i ocupacy sada
+         conn = occupy_connection();
          if (conn->isValid()) {
-            cout << "Validno----" << endl;
-            connection_pool.push(conn);
-            condition.notify_one();
+            release_connection(conn);
          } else {
-            cout << "Nije validno----" << endl;
             if (!conn->isClosed()){
-               cout << "Zatvori----" << endl;
-
-                  conn->close();
+               disconnect_connection(conn);
             }
             Connection *n_conn = create_connection();
-            {
-               cout << "Otvori----" << endl;
-               lock_guard<mutex> lock(io);
-               connection_pool.push(n_conn);
-               condition.notify_one();
-            }
+            release_connection(n_conn);
 
          }
       } catch (const SQLException &error) {
@@ -145,16 +173,9 @@ void marcelb::mysql::MySQL::_tloop(uint32_t b, uint32_t e) {
          }
       }
    }
-
-   last_loop_time = time(nullptr);
 }
 
 Connection* marcelb::mysql::MySQL::occupy_connection() {
-   if (last_loop_time + (MYSQL_PERIODIC_INTERNAL_TIME*3/1000) < time(nullptr)) {
-      if (on_error) {
-         on_error("The time loop is not executing properly");
-      }
-   }
    unique_lock<mutex> lock(io);
    while (connection_pool.empty()) {
       condition.wait(lock);
@@ -171,9 +192,11 @@ void marcelb::mysql::MySQL::release_connection(Connection* connection) {
 }
 
 marcelb::mysql::MySQL::~MySQL() {
+#ifdef MYSQL_USE_ASYNCO
+   p_loop.stop();
+#else
    run_tloop = false;
-#ifndef MYSQL_USE_ASYNCO
-      tloop_future.get();
+   tloop_future.get();
 #endif
    disconnect_pool();
 }

test/compile.sh

@@ -1,2 +1,2 @@
-# g++ -DMYSQL_USE_ASYNCO test.cpp ../src/* ../../asynco/src/* -o test.o -lmysqlcppconn -lpthread
-g++ test.cpp ../src/* ../../asynco/src/* -o test.o -lmysqlcppconn -lpthread
+g++ -DMYSQL_USE_ASYNCO test.cpp ../src/* ../../asynco/src/* -o test.o -lmysqlcppconn -lpthread
+# g++ test.cpp ../src/* ../../asynco/src/* -o test.o -lmysqlcppconn -lpthread

test/test.cpp

@@ -15,17 +15,21 @@ using namespace marcelb::mysql;
 int main() {
     auto inis = rtime_ms();
     try {
-        const int n = 5;
+        const int n = 10;
         // MySQL mydb("tcp://192.168.2.10:3306", "dinio", "H€r5elfInd1aH@nds", "dinio", 5, time_loop_type::internal);
         MySQL mydb("tcp://bitelex.ddns.net:3306", "dinio", "H€r5elfInd1aH@nds", "dinio", n);
         // MySQL mydb("tcp://bitelex.ddns.net:3306", "dinio", "H€r5elfInd1aH@nds", "dinio", 5);
 
-        cout << "init: " << rtime_ms() - inis << endl;
+        cout << "--------------init: " << rtime_ms() - inis << endl;
 
         mydb.on_error = [](const string& error) {
             cout << error << endl;
         };
 
+        mydb.on_connect = []() {
+            cout << "Init all pool connection done" << endl;
+        };
+
         // periodic mysql_tloop ( [&mydb] () {
         //     auto l_start = rtime_ms();
         //     vector<future<void>> to_wait;
@@ -203,7 +207,9 @@ while (true) {
 
     } catch (const SQLException error) {
         cout << error.what() << endl;
-    } catch (const string error) {
+    } catch (const exception& error) {
+        cout << error.what() << endl;
+    } catch (const string& error) {
         cout << error << endl;
     } catch (...) {
         cout << "Jebi ga" << endl;