clients::dns::Resolver Class Reference

#include <userver/clients/dns/resolver.hpp>

Detailed Description

Caching DNS resolver implementation.

Usually retrieved from clients::dns::Component.

Combines file-based (/etc/hosts) name resolution with network-based one.

Definition at line 28 of file resolver.hpp.

Classes
struct	LookupSourceCounters

Public Member Functions
	Resolver (engine::TaskProcessor &fs_task_processor, const ::userver::static_config::DnsClient &config)
	Resolver (const Resolver &)=delete
	Resolver (Resolver &&)=delete
AddrVector	Resolve (const std::string &name, engine::Deadline deadline)
const LookupSourceCounters &	GetLookupSourceCounters () const
	Returns lookup source counters.
void	ReloadHosts ()
	Forces the reload of lookup table file. Waits until the reload is done.
void	FlushNetworkCache ()
	Resets the network results cache.
void	FlushNetworkCache (const std::string &name)
	Removes the specified domain name from the network results cache.
void	WriteMetrics (utils::statistics::Writer &writer) const

Member Function Documentation

Resolve()

AddrVector clients::dns::Resolver::Resolve	(	const std::string &	name,
		engine::Deadline	deadline )

Performs a domain name resolution.

Sources are tried in the following order:

• Cached file lookup table
• Cached network resolution results
• Network name servers

Exceptions

clients::dns::NotResolvedException

if none of the sources provide a result within the specified deadline.

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

• userver/clients/dns/resolver.hpp