Package io.netty.resolver.dns.macos

Class MacOSDnsServerAddressStreamProvider

java.lang.Object

io.netty.resolver.dns.macos.MacOSDnsServerAddressStreamProvider

All Implemented Interfaces:

DnsServerAddressStreamProvider

public final class MacOSDnsServerAddressStreamProvider
extends Object
implements DnsServerAddressStreamProvider

DnsServerAddressStreamProvider implementation which makes use of the same mechanism as Apple's open source mDNSResponder to retrieve the current nameserver configuration of the system.

Field Summary

Fields

Modifier and Type	Field	Description
private Map<String,DnsServerAddresses>	currentMappings
private final AtomicLong	lastRefresh
private static final InternalLogger	logger
private static final long	REFRESH_INTERVAL
private static final Comparator<DnsResolver>	RESOLVER_COMPARATOR
private static final Throwable	UNAVAILABILITY_CAUSE

Constructor Summary

Constructors

Constructor	Description
MacOSDnsServerAddressStreamProvider()

Method Summary

Modifier and Type	Method	Description
static void	ensureAvailability()
static boolean	isAvailable()
private static void	loadNativeLibrary()
DnsServerAddressStream	nameServerAddressStream(String hostname)	Ask this provider for the name servers to query for hostname.
private static DnsResolver[]	resolvers()
private static Map<String,DnsServerAddresses>	retrieveCurrentMappings()
static Throwable	unavailabilityCause()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

RESOLVER_COMPARATOR

private static final Comparator<DnsResolver> RESOLVER_COMPARATOR

UNAVAILABILITY_CAUSE

private static final Throwable UNAVAILABILITY_CAUSE

logger

private static final InternalLogger logger

REFRESH_INTERVAL

private static final long REFRESH_INTERVAL

currentMappings

private volatile Map<String,DnsServerAddresses> currentMappings

lastRefresh

private final AtomicLong lastRefresh

Constructor Details

MacOSDnsServerAddressStreamProvider

public MacOSDnsServerAddressStreamProvider()

Method Details

loadNativeLibrary

private static void loadNativeLibrary()

isAvailable

public static boolean isAvailable()

ensureAvailability

public static void ensureAvailability()

unavailabilityCause

public static Throwable unavailabilityCause()

retrieveCurrentMappings

private static Map<String,DnsServerAddresses> retrieveCurrentMappings()

nameServerAddressStream

public DnsServerAddressStream nameServerAddressStream(String hostname)

Description copied from interface: DnsServerAddressStreamProvider

Ask this provider for the name servers to query for hostname.

Specified by:

nameServerAddressStream in interface DnsServerAddressStreamProvider

Parameters:

hostname - The hostname for which to lookup the DNS server addressed to use. If this is the final DnsServerAddressStreamProvider to be queried then generally empty string or '.' correspond to the default DnsServerAddressStream.

Returns:

The DnsServerAddressStream which should be used to resolve hostname.

resolvers

private static DnsResolver[] resolvers()