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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
/*
* Copyright 2016 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.util.Collections;
import java.util.List;
/**
* A noop DNS cache that actually never caches anything.
*/
public final class NoopDnsCache implements DnsCache {
public static final NoopDnsCache INSTANCE = new NoopDnsCache();
/**
* Private singleton constructor.
*/
private NoopDnsCache() {
}
@Override
public void clear() {
}
@Override
public boolean clear(String hostname) {
return false;
}
@Override
public List extends DnsCacheEntry> get(String hostname, DnsRecord[] additionals) {
return Collections.emptyList();
}
@Override
public DnsCacheEntry cache(String hostname, DnsRecord[] additional,
InetAddress address, long originalTtl, EventLoop loop) {
return new NoopDnsCacheEntry(address);
}
@Override
public DnsCacheEntry cache(String hostname, DnsRecord[] additional, Throwable cause, EventLoop loop) {
return null;
}
@Override
public String toString() {
return NoopDnsCache.class.getSimpleName();
}
private static final class NoopDnsCacheEntry implements DnsCacheEntry {
private final InetAddress address;
NoopDnsCacheEntry(InetAddress address) {
this.address = address;
}
@Override
public InetAddress address() {
return address;
}
@Override
public Throwable cause() {
return null;
}
@Override
public String toString() {
return address.toString();
}
}
}
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