121 lines
2.4 KiB
C++
121 lines
2.4 KiB
C++
/*
|
|
* Copyright (c) 2016 MariaDB Corporation Ab
|
|
*
|
|
* Use of this software is governed by the Business Source License included
|
|
* in the LICENSE.TXT file and at www.mariadb.com/bsl11.
|
|
*
|
|
* Change Date: 2020-01-01
|
|
*
|
|
* On the date above, in accordance with the Business Source License, use
|
|
* of this software will be governed by version 2 or later of the General
|
|
* Public License.
|
|
*/
|
|
|
|
#include "shard_map.hh"
|
|
|
|
#include <algorithm>
|
|
|
|
#include <maxscale/alloc.h>
|
|
|
|
Shard::Shard():
|
|
m_last_updated(time(NULL))
|
|
{
|
|
}
|
|
|
|
Shard::~Shard()
|
|
{
|
|
}
|
|
|
|
bool Shard::add_location(std::string db, SERVER* target)
|
|
{
|
|
std::transform(db.begin(), db.end(), db.begin(), ::tolower);
|
|
return m_map.insert(std::make_pair(db, target)).second;
|
|
}
|
|
|
|
void Shard::replace_location(std::string db, SERVER* target)
|
|
{
|
|
std::transform(db.begin(), db.end(), db.begin(), ::tolower);
|
|
m_map[db] = target;
|
|
}
|
|
|
|
SERVER* Shard::get_location(std::string db)
|
|
{
|
|
SERVER* rval = NULL;
|
|
std::transform(db.begin(), db.end(), db.begin(), ::tolower);
|
|
ServerMap::iterator iter = m_map.find(db);
|
|
|
|
if (iter != m_map.end())
|
|
{
|
|
rval = iter->second;
|
|
}
|
|
|
|
return rval;
|
|
}
|
|
|
|
bool Shard::stale(double max_interval) const
|
|
{
|
|
time_t now = time(NULL);
|
|
|
|
return difftime(now, m_last_updated) > max_interval;
|
|
}
|
|
|
|
bool Shard::empty() const
|
|
{
|
|
return m_map.size() == 0;
|
|
}
|
|
|
|
void Shard::get_content(ServerMap& dest)
|
|
{
|
|
for (ServerMap::iterator it = m_map.begin(); it != m_map.end(); it++)
|
|
{
|
|
dest.insert(*it);
|
|
}
|
|
}
|
|
|
|
bool Shard::newer_than(const Shard& shard) const
|
|
{
|
|
return m_last_updated > shard.m_last_updated;
|
|
}
|
|
|
|
ShardManager::ShardManager()
|
|
{
|
|
spinlock_init(&m_lock);
|
|
}
|
|
|
|
ShardManager::~ShardManager()
|
|
{
|
|
}
|
|
|
|
Shard ShardManager::get_shard(std::string user, double max_interval)
|
|
{
|
|
mxs::SpinLockGuard guard(m_lock);
|
|
|
|
ShardMap::iterator iter = m_maps.find(user);
|
|
|
|
if (iter == m_maps.end() || iter->second.stale(max_interval))
|
|
{
|
|
// No previous shard or a stale shard, construct a new one
|
|
|
|
if (iter != m_maps.end())
|
|
{
|
|
m_maps.erase(iter);
|
|
}
|
|
|
|
return Shard();
|
|
}
|
|
|
|
// Found valid shard
|
|
return iter->second;
|
|
}
|
|
|
|
void ShardManager::update_shard(Shard& shard, std::string user)
|
|
{
|
|
mxs::SpinLockGuard guard(m_lock);
|
|
ShardMap::iterator iter = m_maps.find(user);
|
|
|
|
if (iter == m_maps.end() || shard.newer_than(iter->second))
|
|
{
|
|
m_maps[user] = shard;
|
|
}
|
|
}
|