776e38af88
Motivation: The resolver API and implementations should be considered stable by now so we should not mark these with @UnstableApi Modifications: Remove @UnstableApi annotation from API and implementation of resolver Result: Make it explicit that the API is considered stable
79 lines
2.5 KiB
Java
79 lines
2.5 KiB
Java
/*
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* Copyright 2018 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 io.netty.resolver.dns;
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import io.netty.channel.EventLoop;
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import io.netty.handler.codec.dns.DnsRecord;
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import java.net.InetAddress;
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import java.net.InetSocketAddress;
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import java.util.ArrayList;
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import java.util.List;
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import static java.util.Objects.requireNonNull;
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/**
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* {@link AuthoritativeDnsServerCache} implementation which delegates all operations to a wrapped {@link DnsCache}.
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* This implementation is only present to preserve a upgrade story.
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*/
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final class AuthoritativeDnsServerCacheAdapter implements AuthoritativeDnsServerCache {
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private static final DnsRecord[] EMPTY = new DnsRecord[0];
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private final DnsCache cache;
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AuthoritativeDnsServerCacheAdapter(DnsCache cache) {
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this.cache = requireNonNull(cache, "cache");
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}
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@Override
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public DnsServerAddressStream get(String hostname) {
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List<? extends DnsCacheEntry> entries = cache.get(hostname, EMPTY);
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if (entries == null || entries.isEmpty()) {
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return null;
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}
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if (entries.get(0).cause() != null) {
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return null;
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}
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List<InetSocketAddress> addresses = new ArrayList<>(entries.size());
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int i = 0;
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do {
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InetAddress addr = entries.get(i).address();
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addresses.add(new InetSocketAddress(addr, DefaultDnsServerAddressStreamProvider.DNS_PORT));
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} while (++i < entries.size());
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return new SequentialDnsServerAddressStream(addresses, 0);
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}
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@Override
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public void cache(String hostname, InetSocketAddress address, long originalTtl, EventLoop loop) {
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// We only cache resolved addresses.
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if (!address.isUnresolved()) {
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cache.cache(hostname, EMPTY, address.getAddress(), originalTtl, loop);
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}
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}
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@Override
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public void clear() {
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cache.clear();
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}
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@Override
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public boolean clear(String hostname) {
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return cache.clear(hostname);
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}
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}
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