mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-25 09:02:00 +00:00
106 lines
3.0 KiB
C++
106 lines
3.0 KiB
C++
#pragma once
|
||
|
||
#include <statdaemons/PoolBase.h>
|
||
|
||
#include <DB/Client/Connection.h>
|
||
|
||
|
||
namespace DB
|
||
{
|
||
|
||
using Poco::SharedPtr;
|
||
|
||
|
||
/** Интерфейс для пулов соединений.
|
||
*
|
||
* Использование (на примере обычного ConnectionPool):
|
||
* ConnectionPool pool(...);
|
||
*
|
||
* void thread()
|
||
* {
|
||
* sqxxl::Pool::Entry connection = pool.get();
|
||
* connection->sendQuery("SELECT 'Hello, world!' AS world");
|
||
* }
|
||
*/
|
||
class IConnectionPool : private boost::noncopyable
|
||
{
|
||
public:
|
||
typedef PoolBase<Connection>::Entry Entry;
|
||
virtual Entry get(Settings * settings = nullptr) = 0;
|
||
virtual ~IConnectionPool() {}
|
||
};
|
||
|
||
typedef SharedPtr<IConnectionPool> ConnectionPoolPtr;
|
||
typedef std::vector<ConnectionPoolPtr> ConnectionPools;
|
||
|
||
|
||
|
||
/** Обычный пул соединений, без отказоустойчивости.
|
||
*/
|
||
class ConnectionPool : public PoolBase<Connection>, public IConnectionPool
|
||
{
|
||
public:
|
||
typedef IConnectionPool::Entry Entry;
|
||
typedef PoolBase<Connection> Base;
|
||
|
||
ConnectionPool(unsigned max_connections_,
|
||
const String & host_, UInt16 port_, const String & default_database_,
|
||
const String & user_, const String & password_,
|
||
const DataTypeFactory & data_type_factory_,
|
||
const String & client_name_ = "client",
|
||
Protocol::Compression::Enum compression_ = Protocol::Compression::Enable,
|
||
Poco::Timespan connect_timeout_ = Poco::Timespan(DBMS_DEFAULT_CONNECT_TIMEOUT_SEC, 0),
|
||
Poco::Timespan receive_timeout_ = Poco::Timespan(DBMS_DEFAULT_RECEIVE_TIMEOUT_SEC, 0),
|
||
Poco::Timespan send_timeout_ = Poco::Timespan(DBMS_DEFAULT_SEND_TIMEOUT_SEC, 0))
|
||
: Base(max_connections_, &Logger::get("ConnectionPool (" + Poco::Net::SocketAddress(host_, port_).toString() + ")")),
|
||
host(host_), port(port_), default_database(default_database_),
|
||
user(user_), password(password_),
|
||
client_name(client_name_), compression(compression_), data_type_factory(data_type_factory_),
|
||
connect_timeout(connect_timeout_), receive_timeout(receive_timeout_), send_timeout(send_timeout_)
|
||
{
|
||
}
|
||
|
||
|
||
/** Выделяет соединение для работы. */
|
||
Entry get(Settings * settings = nullptr) override
|
||
{
|
||
if (settings)
|
||
return Base::get(settings->queue_max_wait_ms.totalMilliseconds());
|
||
else
|
||
return Base::get(-1);
|
||
}
|
||
|
||
const std::string & getHost() const
|
||
{
|
||
return host;
|
||
}
|
||
|
||
protected:
|
||
/** Создает новый объект для помещения в пул. */
|
||
ConnectionPtr allocObject() override
|
||
{
|
||
return new Connection(
|
||
host, port, default_database, user, password,
|
||
data_type_factory, client_name, compression,
|
||
connect_timeout, receive_timeout, send_timeout);
|
||
}
|
||
|
||
private:
|
||
String host;
|
||
UInt16 port;
|
||
String default_database;
|
||
String user;
|
||
String password;
|
||
|
||
String client_name;
|
||
Protocol::Compression::Enum compression; /// Сжимать ли данные при взаимодействии с сервером.
|
||
|
||
const DataTypeFactory & data_type_factory;
|
||
|
||
Poco::Timespan connect_timeout;
|
||
Poco::Timespan receive_timeout;
|
||
Poco::Timespan send_timeout;
|
||
};
|
||
|
||
}
|