Server/SourceFiles/Core/Infrastructure/DatabaseConnectionPool.cpp - master - Shymer123/LumenServer

Server/SourceFiles/Core/Infrastructure/DatabaseConnectionPool.cpp

76 строк2 KB

Shymer123

Initial commit: LumenServer

20 июн 2026, 12:43

20 июн 2026, 12:43173f14c

#include "DatabaseConnectionPool.h"

namespace Core::Infrastructure {

    DatabaseConnectionPool::DatabaseConnectionPool(size_t poolSize,
                                                   std::function<std::unique_ptr<Storage::Db::IDatabase>()> factory)
        : m_poolSize(poolSize),
          m_factory(factory)
    {}

    bool DatabaseConnectionPool::connect(const Core::Settings::DatabaseSettings& dbSettings)
    {
        std::lock_guard<std::mutex> lock(m_mutex);
        m_dbSettings = dbSettings;

        while(!m_pool.empty())
        {
            m_pool.pop();
        }

        for(size_t i = 0; i < m_poolSize; ++i)
        {
            auto conn = m_factory();
            if(!conn->connect(dbSettings))
            {
                while(!m_pool.empty())
                {
                    m_pool.pop();
                }
                m_connected = false;
                return false;
            }
            m_pool.push(std::move(conn));
        }

        m_connected = true;
        return true;
    }

    std::unique_ptr<Storage::Db::IDatabase> DatabaseConnectionPool::acquire()
    {
        std::unique_lock lock(m_mutex);
        m_cv.wait(lock, [this] { return !m_pool.empty(); });

        if (!m_connected)
        {
            throw std::runtime_error("Connection pool is not connected");
        }

        auto conn = std::move(m_pool.front());
        m_pool.pop();
        return conn;
    }

    void DatabaseConnectionPool::release(std::unique_ptr<Storage::Db::IDatabase> conn)
    {
        {
            std::lock_guard<std::mutex> lock(m_mutex);

            if(conn && m_connected)
            {
                m_pool.push(std::move(conn));
            }
            else
            {
                auto newConn = m_factory();
                if (newConn->connect(m_dbSettings))
                {
                    m_pool.push(std::move(newConn));
                }
            }
        }
        m_cv.notify_one();
    }

} // namespace Core::Infrastructure