feat(Cmake/Database): separate database lib from common (#5334)

* feat(Core/Database): separate databse lib from common

* 1

src/server/database/Database/MySQLConnection.h

@@ -0,0 +1,129 @@
+/*
+ * Copyright (C) 2016+     AzerothCore <www.azerothcore.org>
+ * Copyright (C) 2008-2016 TrinityCore <http://www.trinitycore.org/>
+ * Copyright (C) 2005-2009 MaNGOS <http://getmangos.com/>
+ */
+
+#include <ace/Activation_Queue.h>
+
+#include "DatabaseWorkerPool.h"
+#include "Transaction.h"
+#include "Util.h"
+
+#ifndef _MYSQLCONNECTION_H
+#define _MYSQLCONNECTION_H
+
+class DatabaseWorker;
+class PreparedStatement;
+class MySQLPreparedStatement;
+class PingOperation;
+
+enum ConnectionFlags
+{
+    CONNECTION_ASYNC = 0x1,
+    CONNECTION_SYNCH = 0x2,
+    CONNECTION_BOTH = CONNECTION_ASYNC | CONNECTION_SYNCH
+};
+
+struct MySQLConnectionInfo
+{
+    MySQLConnectionInfo() = default;
+    MySQLConnectionInfo(const std::string& infoString)
+    {
+        Tokenizer tokens(infoString, ';');
+
+        if (tokens.size() != 5)
+            return;
+
+        uint8 i = 0;
+
+        host.assign(tokens[i++]);
+        port_or_socket.assign(tokens[i++]);
+        user.assign(tokens[i++]);
+        password.assign(tokens[i++]);
+        database.assign(tokens[i++]);
+    }
+
+    std::string user;
+    std::string password;
+    std::string database;
+    std::string host;
+    std::string port_or_socket;
+};
+
+typedef std::map<uint32 /*index*/, std::pair<std::string /*query*/, ConnectionFlags /*sync/async*/>> PreparedStatementMap;
+
+class MySQLConnection
+{
+    template <class T> friend class DatabaseWorkerPool;
+    friend class PingOperation;
+
+public:
+    MySQLConnection(MySQLConnectionInfo& connInfo);                               //! Constructor for synchronous connections.
+    MySQLConnection(ACE_Activation_Queue* queue, MySQLConnectionInfo& connInfo);  //! Constructor for asynchronous connections.
+    virtual ~MySQLConnection();
+
+    virtual uint32 Open();
+    void Close();
+    bool PrepareStatements();
+
+public:
+    bool Execute(const char* sql);
+    bool Execute(PreparedStatement* stmt);
+    ResultSet* Query(const char* sql);
+    PreparedResultSet* Query(PreparedStatement* stmt);
+    bool _Query(const char* sql, MYSQL_RES** pResult, MYSQL_FIELD** pFields, uint64* pRowCount, uint32* pFieldCount);
+    bool _Query(PreparedStatement* stmt, MYSQL_RES** pResult, uint64* pRowCount, uint32* pFieldCount);
+
+    void BeginTransaction();
+    void RollbackTransaction();
+    void CommitTransaction();
+    bool ExecuteTransaction(SQLTransaction& transaction);
+
+    operator bool () const { return m_Mysql != nullptr; }
+    void Ping() { mysql_ping(m_Mysql); }
+
+    uint32 GetLastError() { return mysql_errno(m_Mysql); }
+
+protected:
+    bool LockIfReady()
+    {
+        /// Tries to acquire lock. If lock is acquired by another thread
+        /// the calling parent will just try another connection
+        return m_Mutex.try_lock();
+    }
+
+    void Unlock()
+    {
+        /// Called by parent databasepool. Will let other threads access this connection
+        m_Mutex.unlock();
+    }
+
+    MYSQL* GetHandle()  { return m_Mysql; }
+    MySQLPreparedStatement* GetPreparedStatement(uint32 index);
+    void PrepareStatement(uint32 index, const char* sql, ConnectionFlags flags);
+
+    virtual void DoPrepareStatements() = 0;
+
+protected:
+    std::vector<MySQLPreparedStatement*> m_stmts;         //! PreparedStatements storage
+    PreparedStatementMap                 m_queries;       //! Query storage
+    bool                                 m_reconnecting;  //! Are we reconnecting?
+    bool                                 m_prepareError;  //! Was there any error while preparing statements?
+
+private:
+    bool _HandleMySQLErrno(uint32 errNo);
+
+private:
+    ACE_Activation_Queue* m_queue;                      //! Queue shared with other asynchronous connections.
+    DatabaseWorker*       m_worker;                     //! Core worker task.
+    MYSQL*                m_Mysql;                      //! MySQL Handle.
+    MySQLConnectionInfo&  m_connectionInfo;             //! Connection info (used for logging)
+    ConnectionFlags       m_connectionFlags;            //! Connection flags (for preparing relevant statements)
+    std::mutex            m_Mutex;
+
+    MySQLConnection(MySQLConnection const& right) = delete;
+    MySQLConnection& operator=(MySQLConnection const& right) = delete;
+};
+
+#endif