Removed dead code
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@ -1,406 +0,0 @@
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/*
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* Copyright 2015 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package dorkbox.network.dns.resolver;
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import static io.netty.util.internal.ObjectUtil.checkNotNull;
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import static io.netty.util.internal.ObjectUtil.intValue;
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import java.util.ArrayList;
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import java.util.List;
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import dorkbox.network.dns.resolver.addressProvider.DnsServerAddressStreamProvider;
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import dorkbox.network.dns.resolver.addressProvider.DnsServerAddressStreamProviders;
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import dorkbox.network.dns.resolver.cache.DefaultDnsCache;
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import dorkbox.network.dns.resolver.cache.DnsCache;
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import io.netty.channel.ChannelFactory;
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import io.netty.channel.EventLoop;
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import io.netty.channel.ReflectiveChannelFactory;
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import io.netty.channel.socket.DatagramChannel;
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import io.netty.channel.socket.InternetProtocolFamily;
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import io.netty.resolver.HostsFileEntriesResolver;
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import io.netty.resolver.ResolvedAddressTypes;
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import io.netty.util.internal.UnstableApi;
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/**
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* A {@link DnsNameResolver} builder.
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*/
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@UnstableApi
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public final
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class DnsNameResolverBuilder {
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private final EventLoop eventLoop;
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private ChannelFactory<? extends DatagramChannel> channelFactory;
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private DnsCache resolveCache;
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private DnsCache authoritativeDnsServerCache;
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private Integer minTtl;
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private Integer maxTtl;
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private Integer negativeTtl;
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private long queryTimeoutMillis = 5000;
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private ResolvedAddressTypes resolvedAddressTypes = DnsNameResolver.DEFAULT_RESOLVE_ADDRESS_TYPES;
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private boolean recursionDesired = true;
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private int maxQueriesPerResolve = 16;
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private boolean traceEnabled;
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private int maxPayloadSize = 4096;
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private HostsFileEntriesResolver hostsFileEntriesResolver = HostsFileEntriesResolver.DEFAULT;
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private DnsServerAddressStreamProvider dnsServerAddressStreamProvider = DnsServerAddressStreamProviders.platformDefault();
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private DnsQueryLifecycleObserverFactory dnsQueryLifecycleObserverFactory = NoopDnsQueryLifecycleObserverFactory.INSTANCE;
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private String[] searchDomains;
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private int ndots = -1;
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private boolean decodeIdn = true;
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/**
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* Creates a new builder.
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*
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* @param eventLoop the {@link EventLoop} the {@link EventLoop} which will perform the communication with the DNS
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* servers.
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*/
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public
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DnsNameResolverBuilder(EventLoop eventLoop) {
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this.eventLoop = eventLoop;
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}
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/**
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* Sets the {@link ChannelFactory} as a {@link ReflectiveChannelFactory} of this type.
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* Use as an alternative to {@link #channelFactory(ChannelFactory)}.
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*
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* @param channelType the type
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*
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* @return {@code this}
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*/
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public
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DnsNameResolverBuilder channelType(Class<? extends DatagramChannel> channelType) {
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return channelFactory(new ReflectiveChannelFactory<DatagramChannel>(channelType));
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}
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/**
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* Sets the {@link ChannelFactory} that will create a {@link DatagramChannel}.
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*
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* @param channelFactory the {@link ChannelFactory}
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*
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* @return {@code this}
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*/
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public
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DnsNameResolverBuilder channelFactory(ChannelFactory<? extends DatagramChannel> channelFactory) {
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this.channelFactory = channelFactory;
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return this;
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}
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/**
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* Sets the cache for resolution results.
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*
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* @param resolveCache the DNS resolution results cache
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*
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* @return {@code this}
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*/
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public
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DnsNameResolverBuilder resolveCache(DnsCache resolveCache) {
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this.resolveCache = resolveCache;
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return this;
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}
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/**
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* Set the factory used to generate objects which can observe individual DNS queries.
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*
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* @param lifecycleObserverFactory the factory used to generate objects which can observe individual DNS queries.
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*
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* @return {@code this}
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*/
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public
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DnsNameResolverBuilder dnsQueryLifecycleObserverFactory(DnsQueryLifecycleObserverFactory lifecycleObserverFactory) {
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this.dnsQueryLifecycleObserverFactory = checkNotNull(lifecycleObserverFactory, "lifecycleObserverFactory");
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return this;
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}
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/**
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* Sets the cache for authoritative NS servers
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*
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* @param authoritativeDnsServerCache the authoritative NS servers cache
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*
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* @return {@code this}
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*/
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public
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DnsNameResolverBuilder authoritativeDnsServerCache(DnsCache authoritativeDnsServerCache) {
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this.authoritativeDnsServerCache = authoritativeDnsServerCache;
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return this;
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}
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/**
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* Sets the minimum and maximum TTL of the cached DNS resource records (in seconds). If the TTL of the DNS
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* resource record returned by the DNS server is less than the minimum TTL or greater than the maximum TTL,
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* this resolver will ignore the TTL from the DNS server and use the minimum TTL or the maximum TTL instead
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* respectively.
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* The default value is {@code 0} and {@link Integer#MAX_VALUE}, which practically tells this resolver to
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* respect the TTL from the DNS server.
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*
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* @param minTtl the minimum TTL
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* @param maxTtl the maximum TTL
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*
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* @return {@code this}
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*/
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public
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DnsNameResolverBuilder ttl(int minTtl, int maxTtl) {
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this.maxTtl = maxTtl;
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this.minTtl = minTtl;
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return this;
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}
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/**
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* Sets the TTL of the cache for the failed DNS queries (in seconds).
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*
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* @param negativeTtl the TTL for failed cached queries
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*
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* @return {@code this}
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*/
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public
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DnsNameResolverBuilder negativeTtl(int negativeTtl) {
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this.negativeTtl = negativeTtl;
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return this;
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}
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/**
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* Sets the timeout of each DNS query performed by this resolver (in milliseconds).
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*
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* @param queryTimeoutMillis the query timeout
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*
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* @return {@code this}
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*/
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public
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DnsNameResolverBuilder queryTimeoutMillis(long queryTimeoutMillis) {
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this.queryTimeoutMillis = queryTimeoutMillis;
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return this;
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}
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/**
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* Compute a {@link ResolvedAddressTypes} from some {@link InternetProtocolFamily}s.
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* An empty input will return the default value, based on "java.net" System properties.
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* Valid inputs are (), (IPv4), (IPv6), (Ipv4, IPv6) and (IPv6, IPv4).
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*
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* @param internetProtocolFamilies a valid sequence of {@link InternetProtocolFamily}s
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*
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* @return a {@link ResolvedAddressTypes}
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*/
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public static
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ResolvedAddressTypes computeResolvedAddressTypes(InternetProtocolFamily... internetProtocolFamilies) {
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if (internetProtocolFamilies == null || internetProtocolFamilies.length == 0) {
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return DnsNameResolver.DEFAULT_RESOLVE_ADDRESS_TYPES;
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}
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if (internetProtocolFamilies.length > 2) {
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throw new IllegalArgumentException("No more than 2 InternetProtocolFamilies");
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}
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switch (internetProtocolFamilies[0]) {
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case IPv4:
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return (internetProtocolFamilies.length >= 2 && internetProtocolFamilies[1] == InternetProtocolFamily.IPv6)
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? ResolvedAddressTypes.IPV4_PREFERRED
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: ResolvedAddressTypes.IPV4_ONLY;
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case IPv6:
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return (internetProtocolFamilies.length >= 2 && internetProtocolFamilies[1] == InternetProtocolFamily.IPv4)
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? ResolvedAddressTypes.IPV6_PREFERRED
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: ResolvedAddressTypes.IPV6_ONLY;
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default:
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throw new IllegalArgumentException("Couldn't resolve ResolvedAddressTypes from InternetProtocolFamily array");
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}
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}
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/**
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* Sets the list of the protocol families of the address resolved.
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* You can use {@link DnsNameResolverBuilder#computeResolvedAddressTypes(InternetProtocolFamily...)}
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* to get a {@link ResolvedAddressTypes} out of some {@link InternetProtocolFamily}s.
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*
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* @param resolvedAddressTypes the address types
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*
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* @return {@code this}
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*/
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public
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DnsNameResolverBuilder resolvedAddressTypes(ResolvedAddressTypes resolvedAddressTypes) {
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this.resolvedAddressTypes = resolvedAddressTypes;
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return this;
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}
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/**
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* Sets if this resolver has to send a DNS query with the RD (recursion desired) flag set.
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*
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* @param recursionDesired true if recursion is desired
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*
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* @return {@code this}
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*/
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public
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DnsNameResolverBuilder recursionDesired(boolean recursionDesired) {
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this.recursionDesired = recursionDesired;
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return this;
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}
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/**
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* Sets the maximum allowed number of DNS queries to send when resolving a host name.
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*
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* @param maxQueriesPerResolve the max number of queries
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*
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* @return {@code this}
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*/
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public
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DnsNameResolverBuilder maxQueriesPerResolve(int maxQueriesPerResolve) {
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this.maxQueriesPerResolve = maxQueriesPerResolve;
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return this;
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}
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/**
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* Sets if this resolver should generate the detailed trace information in an exception message so that
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* it is easier to understand the cause of resolution failure.
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*
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* @param traceEnabled true if trace is enabled
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*
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* @return {@code this}
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*/
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public
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DnsNameResolverBuilder traceEnabled(boolean traceEnabled) {
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this.traceEnabled = traceEnabled;
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return this;
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}
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/**
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* Sets the capacity of the datagram packet buffer (in bytes). The default value is {@code 4096} bytes.
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*
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* @param maxPayloadSize the capacity of the datagram packet buffer
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*
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* @return {@code this}
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*/
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public
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DnsNameResolverBuilder maxPayloadSize(int maxPayloadSize) {
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this.maxPayloadSize = maxPayloadSize;
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return this;
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}
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/**
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* @param hostsFileEntriesResolver the {@link HostsFileEntriesResolver} used to first check
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* if the hostname is locally aliased.
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*
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* @return {@code this}
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*/
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public
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DnsNameResolverBuilder hostsFileEntriesResolver(HostsFileEntriesResolver hostsFileEntriesResolver) {
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this.hostsFileEntriesResolver = hostsFileEntriesResolver;
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return this;
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}
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/**
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* Set the {@link DnsServerAddressStreamProvider} which is used to determine which DNS server is used to resolve
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* each hostname.
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*
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* @return {@code this}.
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*/
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public
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DnsNameResolverBuilder nameServerProvider(DnsServerAddressStreamProvider dnsServerAddressStreamProvider) {
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this.dnsServerAddressStreamProvider = checkNotNull(dnsServerAddressStreamProvider, "dnsServerAddressStreamProvider");
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return this;
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}
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/**
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* Set the list of search domains of the resolver.
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*
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* @param searchDomains the search domains
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*
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* @return {@code this}
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*/
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public
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DnsNameResolverBuilder searchDomains(Iterable<String> searchDomains) {
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checkNotNull(searchDomains, "searchDomains");
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final List<String> list = new ArrayList<String>(4);
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for (String f : searchDomains) {
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if (f == null) {
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break;
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}
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// Avoid duplicate entries.
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if (list.contains(f)) {
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continue;
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}
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list.add(f);
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}
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this.searchDomains = list.toArray(new String[list.size()]);
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return this;
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}
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/**
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* Set the number of dots which must appear in a name before an initial absolute query is made.
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* The default value is {@code 1}.
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*
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* @param ndots the ndots value
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*
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* @return {@code this}
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*/
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public
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DnsNameResolverBuilder ndots(int ndots) {
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this.ndots = ndots;
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return this;
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}
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/**
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* Set if domain / host names should be decoded to unicode when received.
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* See <a href="https://tools.ietf.org/html/rfc3492">rfc3492</a>.
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*
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* @param decodeIdn if should get decoded
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*
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* @return {@code this}
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*/
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public
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DnsNameResolverBuilder decodeIdn(boolean decodeIdn) {
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this.decodeIdn = decodeIdn;
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return this;
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}
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/**
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* Returns a new {@link DnsNameResolver} instance.
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*
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* @return a {@link DnsNameResolver}
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*/
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public
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DnsNameResolver build() {
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if (resolveCache != null && (minTtl != null || maxTtl != null || negativeTtl != null)) {
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throw new IllegalStateException("resolveCache and TTLs are mutually exclusive");
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}
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if (authoritativeDnsServerCache != null && (minTtl != null || maxTtl != null || negativeTtl != null)) {
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throw new IllegalStateException("authoritativeDnsServerCache and TTLs are mutually exclusive");
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}
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DnsCache resolveCache = this.resolveCache != null ? this.resolveCache : newCache();
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DnsCache authoritativeDnsServerCache = this.authoritativeDnsServerCache != null ? this.authoritativeDnsServerCache : newCache();
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return new DnsNameResolver(eventLoop,
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channelFactory,
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resolveCache,
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authoritativeDnsServerCache,
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dnsQueryLifecycleObserverFactory,
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queryTimeoutMillis,
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resolvedAddressTypes,
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recursionDesired,
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maxQueriesPerResolve,
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traceEnabled,
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maxPayloadSize,
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hostsFileEntriesResolver,
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dnsServerAddressStreamProvider,
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searchDomains,
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ndots,
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decodeIdn);
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}
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private
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DnsCache newCache() {
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return new DefaultDnsCache(intValue(minTtl, 0), intValue(maxTtl, Integer.MAX_VALUE), intValue(negativeTtl, 0));
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}
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}
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