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Easy Redis Java client and Real-Time Data Platform. Valkey compatible. Sync/Async/RxJava3/Reactive API. Client side caching. Over 50 Redis based Java objects and services: JCache API, Apache Tomcat, Hibernate, Spring, Set, Multimap, SortedSet, Map, List, Queue, Deque, Semaphore, Lock, AtomicLong, Map Reduce, Bloom filter, Scheduler, RPC
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/*
* Copyright 2018 The Netty Project
*
* The Netty Project licenses this file to you under the Apache License,
* version 2.0 (the "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at:
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
package io.netty.resolver.dns;
import io.netty.channel.EventLoop;
import io.netty.handler.codec.dns.DnsRecord;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.util.ArrayList;
import java.util.List;
import static io.netty.util.internal.ObjectUtil.checkNotNull;
/**
* {@link AuthoritativeDnsServerCache} implementation which delegates all operations to a wrapped {@link DnsCache}.
* This implementation is only present to preserve a upgrade story.
*/
final class AuthoritativeDnsServerCacheAdapter implements AuthoritativeDnsServerCache {
private static final DnsRecord[] EMPTY = new DnsRecord[0];
private final DnsCache cache;
AuthoritativeDnsServerCacheAdapter(DnsCache cache) {
this.cache = checkNotNull(cache, "cache");
}
@Override
public DnsServerAddressStream get(String hostname) {
List extends DnsCacheEntry> entries = cache.get(hostname, EMPTY);
if (entries == null || entries.isEmpty()) {
return null;
}
if (entries.get(0).cause() != null) {
return null;
}
List addresses = new ArrayList(entries.size());
int i = 0;
do {
InetAddress addr = entries.get(i).address();
addresses.add(new InetSocketAddress(addr, DefaultDnsServerAddressStreamProvider.DNS_PORT));
} while (++i < entries.size());
return new SequentialDnsServerAddressStream(addresses, 0);
}
@Override
public void cache(String hostname, InetSocketAddress address, long originalTtl, EventLoop loop) {
// We only cache resolved addresses.
if (!address.isUnresolved()) {
cache.cache(hostname, EMPTY, address.getAddress(), originalTtl, loop);
}
}
@Override
public void clear() {
cache.clear();
}
@Override
public boolean clear(String hostname) {
return cache.clear(hostname);
}
}
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