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52 lines
1.8 KiB
C++
52 lines
1.8 KiB
C++
#pragma once
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#include <Access/IAccessEntity.h>
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#include <Access/Common/QuotaDefs.h>
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#include <Access/RolesOrUsersSet.h>
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#include <chrono>
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namespace DB
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{
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/** Quota for resources consumption for specific interval.
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* Used to limit resource usage by user.
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* Quota is applied "softly" - could be slightly exceed, because it is checked usually only on each block of processed data.
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* Accumulated values are not persisted and are lost on server restart.
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* Quota is local to server,
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* but for distributed queries, accumulated values for read rows and bytes
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* are collected from all participating servers and accumulated locally.
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*/
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struct Quota : public IAccessEntity
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{
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/// Amount of resources available to consume for each duration.
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struct Limits
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{
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std::optional<QuotaValue> max[static_cast<size_t>(QuotaType::MAX)];
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std::chrono::seconds duration = std::chrono::seconds::zero();
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/// Intervals can be randomized (to avoid DoS if intervals for many users end at one time).
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bool randomize_interval = false;
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friend bool operator ==(const Limits & lhs, const Limits & rhs);
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friend bool operator !=(const Limits & lhs, const Limits & rhs) { return !(lhs == rhs); }
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};
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std::vector<Limits> all_limits;
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/// Key to share quota consumption.
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/// Users with the same key share the same amount of resource.
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QuotaKeyType key_type = QuotaKeyType::NONE;
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/// Which roles or users should use this quota.
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RolesOrUsersSet to_roles;
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bool equal(const IAccessEntity & other) const override;
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std::shared_ptr<IAccessEntity> clone() const override { return cloneImpl<Quota>(); }
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static constexpr const auto TYPE = AccessEntityType::QUOTA;
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AccessEntityType getType() const override { return TYPE; }
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};
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using QuotaPtr = std::shared_ptr<const Quota>;
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}
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