ClickHouse/dbms/src/IO/ConnectionTimeouts.h

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#pragma once
#include <Poco/Timespan.h>
#include <Interpreters/Settings.h>
namespace DB
{
struct ConnectionTimeouts
{
Poco::Timespan connection_timeout;
Poco::Timespan send_timeout;
Poco::Timespan receive_timeout;
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Poco::Timespan tcp_keep_alive_timeout;
ConnectionTimeouts() = default;
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ConnectionTimeouts(const Poco::Timespan & connection_timeout_,
const Poco::Timespan & send_timeout_,
const Poco::Timespan & receive_timeout_)
: connection_timeout(connection_timeout_),
send_timeout(send_timeout_),
receive_timeout(receive_timeout_),
tcp_keep_alive_timeout(0)
{
}
ConnectionTimeouts(const Poco::Timespan & connection_timeout_,
const Poco::Timespan & send_timeout_,
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const Poco::Timespan & receive_timeout_,
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const Poco::Timespan & tcp_keep_alive_timeout_)
: connection_timeout(connection_timeout_),
send_timeout(send_timeout_),
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receive_timeout(receive_timeout_),
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tcp_keep_alive_timeout(tcp_keep_alive_timeout_)
{
}
static Poco::Timespan saturate(const Poco::Timespan & timespan, const Poco::Timespan & limit)
{
if (limit.totalMicroseconds() == 0)
return timespan;
else
return (timespan > limit) ? limit : timespan;
}
ConnectionTimeouts getSaturated(const Poco::Timespan & limit) const
{
return ConnectionTimeouts(saturate(connection_timeout, limit),
saturate(send_timeout, limit),
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saturate(receive_timeout, limit),
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saturate(tcp_keep_alive_timeout, limit));
}
/// Timeouts for the case when we have just single attempt to connect.
static ConnectionTimeouts getTCPTimeoutsWithoutFailover(const Settings & settings)
{
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return ConnectionTimeouts(settings.connect_timeout, settings.send_timeout, settings.receive_timeout, settings.tcp_keep_alive_timeout);
}
/// Timeouts for the case when we will try many addresses in a loop.
static ConnectionTimeouts getTCPTimeoutsWithFailover(const Settings & settings)
{
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return ConnectionTimeouts(settings.connect_timeout_with_failover_ms, settings.send_timeout, settings.receive_timeout, settings.tcp_keep_alive_timeout);
}
static ConnectionTimeouts getHTTPTimeouts(const Settings & settings)
{
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return ConnectionTimeouts(settings.http_connection_timeout, settings.http_send_timeout, settings.http_receive_timeout);
}
};
}