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#include <Client/ConnectionPool.h>
#include <boost/functional/hash.hpp>
namespace DB
{
ConnectionPoolPtr ConnectionPoolFactory::get(
unsigned max_connections,
String host,
UInt16 port,
String default_database,
String user,
String password,
String quota_key,
String cluster,
String cluster_secret,
String client_name,
Protocol::Compression compression,
Protocol::Secure secure,
Priority priority)
{
Key key{
max_connections, host, port, default_database, user, password, quota_key, cluster, cluster_secret, client_name, compression, secure, priority};
std::lock_guard lock(mutex);
auto [it, inserted] = pools.emplace(key, ConnectionPoolPtr{});
if (!inserted)
if (auto res = it->second.lock())
return res;
ConnectionPoolPtr ret
{
new ConnectionPool(
max_connections,
host,
port,
default_database,
user,
password,
quota_key,
cluster,
cluster_secret,
client_name,
compression,
secure,
priority),
[key, this](auto ptr)
{
{
std::lock_guard another_lock(mutex);
pools.erase(key);
}
delete ptr;
}
};
it->second = ConnectionPoolWeakPtr(ret);
return ret;
}
size_t ConnectionPoolFactory::KeyHash::operator()(const ConnectionPoolFactory::Key & k) const
{
using boost::hash_combine;
using boost::hash_value;
size_t seed = 0;
hash_combine(seed, hash_value(k.max_connections));
hash_combine(seed, hash_value(k.host));
hash_combine(seed, hash_value(k.port));
hash_combine(seed, hash_value(k.default_database));
hash_combine(seed, hash_value(k.user));
hash_combine(seed, hash_value(k.password));
hash_combine(seed, hash_value(k.cluster));
hash_combine(seed, hash_value(k.cluster_secret));
hash_combine(seed, hash_value(k.client_name));
hash_combine(seed, hash_value(k.compression));
hash_combine(seed, hash_value(k.secure));
hash_combine(seed, hash_value(k.priority.value));
return seed;
}
ConnectionPoolFactory & ConnectionPoolFactory::instance()
{
static ConnectionPoolFactory ret;
return ret;
}
}
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