storages::postgres::NotifyScope Class Reference

Table of Contents

• Detailed Description
• Public Member Functions

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

Detailed Description

RAII scope for receiving notifications.

Used for waiting for notifications on PostgreSQL connections. Created by calling storages::postgres::Cluster::Listen(). Exclusively holds a connection from a pool.

Non-copyable.

Usage synopsis

auto scope = cluster.Listen("channel");
cluster.Execute(pg::ClusterHostType::kMaster,
                "select pg_notify('channel', NULL)");
auto ntf = scope.WaitNotify(engine::Deadline::FromDuration(100ms));

Definition at line 37 of file notify.hpp.

Public Member Functions
	NotifyScope (detail::ConnectionPtr conn, std::string_view channel, OptionalCommandControl cmd_ctl)
	NotifyScope (NotifyScope &&) noexcept
NotifyScope &	operator= (NotifyScope &&) noexcept
	NotifyScope (const NotifyScope &)=delete
NotifyScope &	operator= (const NotifyScope &)=delete
Notification	WaitNotify (engine::Deadline deadline)
	Wait for notification on connection.

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

• userver/storages/postgres/notify.hpp