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#include "DiskLocal.h"
#include "DiskSelector.h"
#include <IO/WriteHelpers.h>
#include <Common/escapeForFileName.h>
#include <Common/quoteString.h>
#include <Common/logger_useful.h>
#include <Interpreters/Context.h>
#include <set>
namespace DB
{
namespace ErrorCodes
{
extern const int EXCESSIVE_ELEMENT_IN_CONFIG;
extern const int UNKNOWN_DISK;
extern const int LOGICAL_ERROR;
}
void DiskSelector::assertInitialized() const
{
if (!is_initialized)
throw Exception(ErrorCodes::LOGICAL_ERROR, "DiskSelector not initialized");
}
void DiskSelector::initialize(const Poco::Util::AbstractConfiguration & config, const String & config_prefix, ContextPtr context, DiskValidator disk_validator)
{
Poco::Util::AbstractConfiguration::Keys keys;
config.keys(config_prefix, keys);
auto & factory = DiskFactory::instance();
constexpr auto default_disk_name = "default";
bool has_default_disk = false;
for (const auto & disk_name : keys)
{
if (!std::all_of(disk_name.begin(), disk_name.end(), isWordCharASCII))
throw Exception(ErrorCodes::EXCESSIVE_ELEMENT_IN_CONFIG, "Disk name can contain only alphanumeric and '_' ({})", disk_name);
if (disk_name == default_disk_name)
has_default_disk = true;
auto disk_config_prefix = config_prefix + "." + disk_name;
if (disk_validator && !disk_validator(config, disk_config_prefix))
continue;
disks.emplace(disk_name, factory.create(disk_name, config, disk_config_prefix, context, disks));
}
if (!has_default_disk)
{
disks.emplace(
default_disk_name,
std::make_shared<DiskLocal>(
default_disk_name, context->getPath(), 0, context, config, config_prefix));
}
is_initialized = true;
}
DiskSelectorPtr DiskSelector::updateFromConfig(
const Poco::Util::AbstractConfiguration & config, const String & config_prefix, ContextPtr context) const
{
assertInitialized();
Poco::Util::AbstractConfiguration::Keys keys;
config.keys(config_prefix, keys);
auto & factory = DiskFactory::instance();
std::shared_ptr<DiskSelector> result = std::make_shared<DiskSelector>(*this);
constexpr auto default_disk_name = "default";
DisksMap old_disks_minus_new_disks(result->getDisksMap());
for (const auto & disk_name : keys)
{
if (!std::all_of(disk_name.begin(), disk_name.end(), isWordCharASCII))
throw Exception(ErrorCodes::EXCESSIVE_ELEMENT_IN_CONFIG, "Disk name can contain only alphanumeric and '_' ({})", disk_name);
auto disk_config_prefix = config_prefix + "." + disk_name;
if (!result->getDisksMap().contains(disk_name))
{
result->addToDiskMap(disk_name, factory.create(disk_name, config, disk_config_prefix, context, result->getDisksMap()));
}
else
{
auto disk = old_disks_minus_new_disks[disk_name];
disk->applyNewSettings(config, context, disk_config_prefix, result->getDisksMap());
old_disks_minus_new_disks.erase(disk_name);
}
}
old_disks_minus_new_disks.erase(default_disk_name);
if (!old_disks_minus_new_disks.empty())
{
WriteBufferFromOwnString warning;
if (old_disks_minus_new_disks.size() == 1)
writeString("Disk ", warning);
else
writeString("Disks ", warning);
int num_disks_removed_from_config = 0;
for (const auto & [name, disk] : old_disks_minus_new_disks)
{
/// Custom disks are not present in config.
if (disk->isCustomDisk())
continue;
if (num_disks_removed_from_config++ > 0)
writeString(", ", warning);
writeBackQuotedString(name, warning);
}
if (num_disks_removed_from_config > 0)
{
LOG_WARNING(
&Poco::Logger::get("DiskSelector"),
"{} disappeared from configuration, this change will be applied after restart of ClickHouse",
warning.str());
}
}
return result;
}
DiskPtr DiskSelector::tryGet(const String & name) const
{
assertInitialized();
auto it = disks.find(name);
if (it == disks.end())
return nullptr;
return it->second;
}
DiskPtr DiskSelector::get(const String & name) const
{
auto disk = tryGet(name);
if (!disk)
throw Exception(ErrorCodes::UNKNOWN_DISK, "Unknown disk {}", name);
return disk;
}
const DisksMap & DiskSelector::getDisksMap() const
{
assertInitialized();
return disks;
}
void DiskSelector::addToDiskMap(const String & name, DiskPtr disk)
{
assertInitialized();
auto [_, inserted] = disks.emplace(name, disk);
if (!inserted)
throw Exception(ErrorCodes::LOGICAL_ERROR, "Disk with name `{}` is already in disks map", name);
}
void DiskSelector::shutdown()
{
assertInitialized();
for (auto & e : disks)
e.second->shutdown();
}
}
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