MacOSDnsServerAddressStreamProvider

java.lang.Object
- io.netty.resolver.dns.macos.MacOSDnsServerAddressStreamProvider

All Implemented Interfaces:

DnsServerAddressStreamProvider
```
public final class MacOSDnsServerAddressStreamProvider
extends java.lang.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 java.util.Map<java.lang.String,DnsServerAddresses>`	`currentMappings`
`private java.util.concurrent.atomic.AtomicLong`	`lastRefresh`
`private static InternalLogger`	`logger`
`private static long`	`REFRESH_INTERVAL`
`private static java.util.Comparator<DnsResolver>`	`RESOLVER_COMPARATOR`
`private static java.lang.Throwable`	`UNAVAILABILITY_CAUSE`

Constructor Summary

Constructors
Constructor Description

MacOSDnsServerAddressStreamProvider()

Method Summary

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

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

RESOLVER_COMPARATOR

private static final java.util.Comparator<DnsResolver> RESOLVER_COMPARATOR

UNAVAILABILITY_CAUSE

private static final java.lang.Throwable UNAVAILABILITY_CAUSE

logger

private static final InternalLogger logger

REFRESH_INTERVAL

private static final long REFRESH_INTERVAL

currentMappings

private volatile java.util.Map<java.lang.String,DnsServerAddresses> currentMappings

lastRefresh

private final java.util.concurrent.atomic.AtomicLong lastRefresh

Constructor Detail
- MacOSDnsServerAddressStreamProvider
```
public MacOSDnsServerAddressStreamProvider()
```

Method Detail
- loadNativeLibrary
```
private static void loadNativeLibrary()
```
- isAvailable
```
public static boolean isAvailable()
```
- ensureAvailability
```
public static void ensureAvailability()
```
- unavailabilityCause
```
public static java.lang.Throwable unavailabilityCause()
```
- retrieveCurrentMappings
```
private static java.util.Map<java.lang.String,DnsServerAddresses> retrieveCurrentMappings()
```
- nameServerAddressStream
```
public DnsServerAddressStream nameServerAddressStream(java.lang.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()
```