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112 lines
3.1 KiB
C++
112 lines
3.1 KiB
C++
#pragma once
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#include <statdaemons/PoolBase.h>
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#include <DB/Client/Connection.h>
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namespace DB
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{
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using Poco::SharedPtr;
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/** Интерфейс для пулов соединений.
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*
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* Использование (на примере обычного ConnectionPool):
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* ConnectionPool pool(...);
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*
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* void thread()
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* {
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* sqxxl::Pool::Entry connection = pool.get();
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* connection->sendQuery("SELECT 'Hello, world!' AS world");
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* }
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*/
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class IConnectionPool : private boost::noncopyable
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{
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public:
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typedef PoolBase<Connection>::Entry Entry;
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virtual Entry get(Settings * settings = nullptr) = 0;
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virtual std::vector<Entry> getMany(unsigned max_connections, Settings * settings = nullptr)
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{
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return std::vector<Entry>{ get(settings) };
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}
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virtual ~IConnectionPool() {}
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};
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typedef SharedPtr<IConnectionPool> ConnectionPoolPtr;
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typedef std::vector<ConnectionPoolPtr> ConnectionPools;
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/** Обычный пул соединений, без отказоустойчивости.
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*/
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class ConnectionPool : public PoolBase<Connection>, public IConnectionPool
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{
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public:
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typedef IConnectionPool::Entry Entry;
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typedef PoolBase<Connection> Base;
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ConnectionPool(unsigned max_connections_,
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const String & host_, UInt16 port_, const String & default_database_,
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const String & user_, const String & password_,
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const DataTypeFactory & data_type_factory_,
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const String & client_name_ = "client",
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Protocol::Compression::Enum compression_ = Protocol::Compression::Enable,
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Poco::Timespan connect_timeout_ = Poco::Timespan(DBMS_DEFAULT_CONNECT_TIMEOUT_SEC, 0),
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Poco::Timespan receive_timeout_ = Poco::Timespan(DBMS_DEFAULT_RECEIVE_TIMEOUT_SEC, 0),
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Poco::Timespan send_timeout_ = Poco::Timespan(DBMS_DEFAULT_SEND_TIMEOUT_SEC, 0))
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: Base(max_connections_, &Logger::get("ConnectionPool (" + Poco::Net::SocketAddress(host_, port_).toString() + ")")),
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host(host_), port(port_), default_database(default_database_),
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user(user_), password(password_),
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client_name(client_name_), compression(compression_), data_type_factory(data_type_factory_),
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connect_timeout(connect_timeout_), receive_timeout(receive_timeout_), send_timeout(send_timeout_)
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{
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}
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/** Выделяет соединение для работы. */
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Entry get(Settings * settings = nullptr) override
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{
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if (settings)
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return Base::get(settings->queue_max_wait_ms.totalMilliseconds());
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else
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return Base::get(-1);
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}
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const std::string & getHost() const
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{
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return host;
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}
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protected:
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/** Создает новый объект для помещения в пул. */
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ConnectionPtr allocObject() override
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{
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return new Connection(
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host, port, default_database, user, password,
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data_type_factory, client_name, compression,
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connect_timeout, receive_timeout, send_timeout);
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}
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private:
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String host;
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UInt16 port;
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String default_database;
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String user;
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String password;
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String client_name;
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Protocol::Compression::Enum compression; /// Сжимать ли данные при взаимодействии с сервером.
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const DataTypeFactory & data_type_factory;
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Poco::Timespan connect_timeout;
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Poco::Timespan receive_timeout;
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Poco::Timespan send_timeout;
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};
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}
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