storages::postgres::DistLockStrategy Class Reference

Table of Contents

• Detailed Description
• Public Member Functions
• Member Function Documentation
• Acquire()
• Release()

#include <userver/storages/postgres/dist_lock_strategy.hpp>

Detailed Description

Postgres distributed locking strategy.

Definition at line 17 of file dist_lock_strategy.hpp.

Inheritance diagram for storages::postgres::DistLockStrategy:

Collaboration diagram for storages::postgres::DistLockStrategy:

Public Member Functions
	DistLockStrategy (ClusterPtr cluster, const std::string &table, const std::string &lock_name, const dist_lock::DistLockSettings &settings)
void	Acquire (std::chrono::milliseconds lock_ttl, const std::string &locker_id) override
void	Release (const std::string &locker_id) override
void	UpdateCommandControl (CommandControl cc)

Member Function Documentation

Acquire()

void storages::postgres::DistLockStrategy::Acquire ( std::chrono::milliseconds lock_ttl, const std::string & locker_id )

overridevirtual

Acquires the distributed lock.

Parameters

lock_ttl	The duration for which the lock must be held.
locker_id	Globally unique ID of the locking entity.

Exceptions

LockIsAcquiredByAnotherHostError	when the lock is busy
anything	else when the locking fails, strategy is responsible for cleanup, Release won't be invoked.

Implements dist_lock::DistLockStrategyBase.

Release()

void storages::postgres::DistLockStrategy::Release ( const std::string & locker_id )

overridevirtual

Releases the lock.

Parameters

locker_id

Globally unique ID of the locking entity, must be the same as in Acquire().

Note

Exceptions are ignored.

Implements dist_lock::DistLockStrategyBase.

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The documentation for this class was generated from the following file:

• userver/storages/postgres/dist_lock_strategy.hpp