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io.netty5.resolver.dns

pack-priv final Class NoopDnsQueryLifecycleObserver

extends Object
implements DnsQueryLifecycleObserver
Class Inheritance
All Implemented Interfaces
io.netty5.resolver.dns.DnsQueryLifecycleObserver
Imports
io.netty5.handler.codec.dns.DnsQuestion, .DnsResponseCode, io.netty5.util.concurrent.Future, java.net.InetSocketAddress, java.util.List

Field Summary

Modifier and TypeField and Description
pack-priv static final NoopDnsQueryLifecycleObserver
INSTANCE

Constructor Summary

AccessConstructor and Description
private
NoopDnsQueryLifecycleObserver()

Method Summary

Modifier and TypeMethod and Description
public void
queryCancelled(int
The number of queries remaining.
queriesRemaining)

Implements io.netty5.resolver.dns.DnsQueryLifecycleObserver.queryCancelled.

The query may have been written but it was cancelled at some point.
public DnsQueryLifecycleObserver
queryCNAMEd(DnsQuestion
the question we would use if we issue a new query.
cnameQuestion)

Implements io.netty5.resolver.dns.DnsQueryLifecycleObserver.queryCNAMEd.

The query returned a CNAME which we may attempt to follow with a new query.
public void
queryFailed(Throwable
The cause which for the failure.
cause)

Implements io.netty5.resolver.dns.DnsQueryLifecycleObserver.queryFailed.

The following criteria are possible:
  • IO Error
  • Server responded with an invalid DNS response
  • Server responded with a valid DNS response, but it didn't progress the resolution
public DnsQueryLifecycleObserver
queryNoAnswer(DnsResponseCode
the unexpected response code.
code)

Implements io.netty5.resolver.dns.DnsQueryLifecycleObserver.queryNoAnswer.

The response to the query didn't provide the expected response code, but it didn't return DnsResponseCode#NXDOMAIN so we may try to query again.
public DnsQueryLifecycleObserver
queryRedirected(List<InetSocketAddress>
The name servers the query has been redirected to.
nameServers)

Implements io.netty5.resolver.dns.DnsQueryLifecycleObserver.queryRedirected.

The query has been redirected to another list of DNS servers.
public void
querySucceed()

Implements io.netty5.resolver.dns.DnsQueryLifecycleObserver.querySucceed.

The query received the expected results.
public void
queryWritten(InetSocketAddress
The DNS server address which the query was sent to.
dnsServerAddress, Future<Void>
The future which represents the status of the write operation for the DNS query.
future)

Implements io.netty5.resolver.dns.DnsQueryLifecycleObserver.queryWritten.

The query has been written.
Inherited from java.lang.Object:
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Field Detail

INSTANCEback to summary
pack-priv static final NoopDnsQueryLifecycleObserver INSTANCE

Constructor Detail

NoopDnsQueryLifecycleObserverback to summary
private NoopDnsQueryLifecycleObserver()

Method Detail

queryCancelledback to summary
public void queryCancelled(int queriesRemaining)

Implements io.netty5.resolver.dns.DnsQueryLifecycleObserver.queryCancelled.

Doc from io.netty5.resolver.dns.DnsQueryLifecycleObserver.queryCancelled.

The query may have been written but it was cancelled at some point.

Parameters
queriesRemaining:int

The number of queries remaining.

Annotations
@Override
queryCNAMEdback to summary
public DnsQueryLifecycleObserver queryCNAMEd(DnsQuestion cnameQuestion)

Implements io.netty5.resolver.dns.DnsQueryLifecycleObserver.queryCNAMEd.

Doc from io.netty5.resolver.dns.DnsQueryLifecycleObserver.queryCNAMEd.

The query returned a CNAME which we may attempt to follow with a new query.

Note that multiple queries may be encountering a CNAME. For example a if both DnsRecordType#AAAA and DnsRecordType#A are supported we may query for both.

Parameters
cnameQuestion:DnsQuestion

the question we would use if we issue a new query.

Returns:DnsQueryLifecycleObserver

An observer for the new query which we may issue.

Annotations
@Override
queryFailedback to summary
public void queryFailed(Throwable cause)

Implements io.netty5.resolver.dns.DnsQueryLifecycleObserver.queryFailed.

Doc from io.netty5.resolver.dns.DnsQueryLifecycleObserver.queryFailed.

The following criteria are possible:

  • IO Error
  • Server responded with an invalid DNS response
  • Server responded with a valid DNS response, but it didn't progress the resolution
Parameters
cause:Throwable

The cause which for the failure.

Annotations
@Override
queryNoAnswerback to summary
public DnsQueryLifecycleObserver queryNoAnswer(DnsResponseCode code)

Implements io.netty5.resolver.dns.DnsQueryLifecycleObserver.queryNoAnswer.

Doc from io.netty5.resolver.dns.DnsQueryLifecycleObserver.queryNoAnswer.

The response to the query didn't provide the expected response code, but it didn't return DnsResponseCode#NXDOMAIN so we may try to query again.

Parameters
code:DnsResponseCode

the unexpected response code.

Returns:DnsQueryLifecycleObserver

An observer for the new query which we may issue.

Annotations
@Override
queryRedirectedback to summary
public DnsQueryLifecycleObserver queryRedirected(List<InetSocketAddress> nameServers)

Implements io.netty5.resolver.dns.DnsQueryLifecycleObserver.queryRedirected.

Doc from io.netty5.resolver.dns.DnsQueryLifecycleObserver.queryRedirected.

The query has been redirected to another list of DNS servers.

Parameters
nameServers:List<InetSocketAddress>

The name servers the query has been redirected to.

Returns:DnsQueryLifecycleObserver

An observer for the new query which we may issue.

Annotations
@Override
querySucceedback to summary
public void querySucceed()

Implements io.netty5.resolver.dns.DnsQueryLifecycleObserver.querySucceed.

Doc from io.netty5.resolver.dns.DnsQueryLifecycleObserver.querySucceed.

The query received the expected results.

Annotations
@Override
queryWrittenback to summary
public void queryWritten(InetSocketAddress dnsServerAddress, Future<Void> future)

Implements io.netty5.resolver.dns.DnsQueryLifecycleObserver.queryWritten.

Doc from io.netty5.resolver.dns.DnsQueryLifecycleObserver.queryWritten.

The query has been written.

Parameters
dnsServerAddress:InetSocketAddress

The DNS server address which the query was sent to.

future:Future<Void>

The future which represents the status of the write operation for the DNS query.

Annotations
@Override