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#include <Access/SettingsProfilesCache.h>
#include <Access/AccessControl.h>
#include <Access/SettingsProfile.h>
#include <Access/SettingsProfilesInfo.h>
#include <Common/quoteString.h>
namespace DB
{
namespace ErrorCodes
{
extern const int THERE_IS_NO_PROFILE;
}
SettingsProfilesCache::SettingsProfilesCache(const AccessControl & access_control_)
: access_control(access_control_) {}
SettingsProfilesCache::~SettingsProfilesCache() = default;
void SettingsProfilesCache::ensureAllProfilesRead()
{
/// `mutex` is already locked.
if (all_profiles_read)
return;
all_profiles_read = true;
subscription = access_control.subscribeForChanges<SettingsProfile>(
[&](const UUID & id, const AccessEntityPtr & entity)
{
if (entity)
profileAddedOrChanged(id, typeid_cast<SettingsProfilePtr>(entity));
else
profileRemoved(id);
});
for (const UUID & id : access_control.findAll<SettingsProfile>())
{
auto profile = access_control.tryRead<SettingsProfile>(id);
if (profile)
{
all_profiles.emplace(id, profile);
profiles_by_name[profile->getName()] = id;
}
}
}
void SettingsProfilesCache::profileAddedOrChanged(const UUID & profile_id, const SettingsProfilePtr & new_profile)
{
std::lock_guard lock{mutex};
auto it = all_profiles.find(profile_id);
if (it == all_profiles.end())
{
all_profiles.emplace(profile_id, new_profile);
profiles_by_name[new_profile->getName()] = profile_id;
}
else
{
auto old_profile = it->second;
it->second = new_profile;
if (old_profile->getName() != new_profile->getName())
profiles_by_name.erase(old_profile->getName());
profiles_by_name[new_profile->getName()] = profile_id;
}
profile_infos_cache.clear();
mergeSettingsAndConstraints();
}
void SettingsProfilesCache::profileRemoved(const UUID & profile_id)
{
std::lock_guard lock{mutex};
auto it = all_profiles.find(profile_id);
if (it == all_profiles.end())
return;
profiles_by_name.erase(it->second->getName());
all_profiles.erase(it);
profile_infos_cache.clear();
mergeSettingsAndConstraints();
}
void SettingsProfilesCache::setDefaultProfileName(const String & default_profile_name)
{
std::lock_guard lock{mutex};
ensureAllProfilesRead();
if (default_profile_name.empty())
{
default_profile_id = {};
return;
}
auto it = profiles_by_name.find(default_profile_name);
if (it == profiles_by_name.end())
throw Exception(ErrorCodes::THERE_IS_NO_PROFILE, "Settings profile {} not found", backQuote(default_profile_name));
default_profile_id = it->second;
}
void SettingsProfilesCache::mergeSettingsAndConstraints()
{
/// `mutex` is already locked.
for (auto i = enabled_settings.begin(), e = enabled_settings.end(); i != e;)
{
auto enabled = i->second.lock();
if (!enabled)
i = enabled_settings.erase(i);
else
{
mergeSettingsAndConstraintsFor(*enabled);
++i;
}
}
}
void SettingsProfilesCache::mergeSettingsAndConstraintsFor(EnabledSettings & enabled) const
{
SettingsProfileElements merged_settings;
if (default_profile_id)
{
SettingsProfileElement new_element;
new_element.parent_profile = *default_profile_id;
merged_settings.emplace_back(new_element);
}
for (const auto & [profile_id, profile] : all_profiles)
if (profile->to_roles.match(enabled.params.user_id, enabled.params.enabled_roles))
{
SettingsProfileElement new_element;
new_element.parent_profile = profile_id;
merged_settings.emplace_back(new_element);
}
merged_settings.merge(enabled.params.settings_from_enabled_roles);
merged_settings.merge(enabled.params.settings_from_user);
auto info = std::make_shared<SettingsProfilesInfo>(access_control);
info->profiles = merged_settings.toProfileIDs();
substituteProfiles(merged_settings, info->profiles_with_implicit, info->names_of_profiles);
info->settings = merged_settings.toSettingsChanges();
info->constraints = merged_settings.toSettingsConstraints(access_control);
enabled.setInfo(std::move(info));
}
void SettingsProfilesCache::substituteProfiles(
SettingsProfileElements & elements,
std::vector<UUID> & substituted_profiles,
std::unordered_map<UUID, String> & names_of_substituted_profiles) const
{
/// We should substitute profiles in reversive order because the same profile can occur
/// in `elements` multiple times (with some other settings in between) and in this case
/// the last occurrence should override all the previous ones.
boost::container::flat_set<UUID> substituted_profiles_set;
size_t i = elements.size();
while (i != 0)
{
auto & element = elements[--i];
if (!element.parent_profile)
continue;
auto profile_id = *element.parent_profile;
element.parent_profile.reset();
if (substituted_profiles_set.count(profile_id))
continue;
auto profile_it = all_profiles.find(profile_id);
if (profile_it == all_profiles.end())
continue;
const auto & profile = profile_it->second;
const auto & profile_elements = profile->elements;
elements.insert(elements.begin() + i, profile_elements.begin(), profile_elements.end());
i += profile_elements.size();
substituted_profiles.push_back(profile_id);
substituted_profiles_set.insert(profile_id);
names_of_substituted_profiles.emplace(profile_id, profile->getName());
}
std::reverse(substituted_profiles.begin(), substituted_profiles.end());
}
std::shared_ptr<const EnabledSettings> SettingsProfilesCache::getEnabledSettings(
const UUID & user_id,
const SettingsProfileElements & settings_from_user,
const boost::container::flat_set<UUID> & enabled_roles,
const SettingsProfileElements & settings_from_enabled_roles)
{
std::lock_guard lock{mutex};
ensureAllProfilesRead();
EnabledSettings::Params params;
params.user_id = user_id;
params.settings_from_user = settings_from_user;
params.enabled_roles = enabled_roles;
params.settings_from_enabled_roles = settings_from_enabled_roles;
auto it = enabled_settings.find(params);
if (it != enabled_settings.end())
{
auto from_cache = it->second.lock();
if (from_cache)
return from_cache;
enabled_settings.erase(it);
}
std::shared_ptr<EnabledSettings> res(new EnabledSettings(params));
enabled_settings.emplace(std::move(params), res);
mergeSettingsAndConstraintsFor(*res);
return res;
}
std::shared_ptr<const SettingsProfilesInfo> SettingsProfilesCache::getSettingsProfileInfo(const UUID & profile_id)
{
std::lock_guard lock{mutex};
ensureAllProfilesRead();
if (auto pos = this->profile_infos_cache.get(profile_id))
return *pos;
SettingsProfileElements elements = all_profiles[profile_id]->elements;
auto info = std::make_shared<SettingsProfilesInfo>(access_control);
info->profiles.push_back(profile_id);
info->profiles_with_implicit.push_back(profile_id);
substituteProfiles(elements, info->profiles_with_implicit, info->names_of_profiles);
info->settings = elements.toSettingsChanges();
info->constraints.merge(elements.toSettingsConstraints(access_control));
profile_infos_cache.add(profile_id, info);
return info;
}
}
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