netty5/resolver-dns/src/main/java/io/netty/resolver/dns/NoopDnsCnameCache.java

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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:
*
* http://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.util.internal.UnstableApi;
@UnstableApi
public final class NoopDnsCnameCache implements DnsCnameCache {
public static final NoopDnsCnameCache INSTANCE = new NoopDnsCnameCache();
private NoopDnsCnameCache() { }
@Override
public String get(String hostname) {
return null;
}
@Override
public void cache(String hostname, String cname, long originalTtl, EventLoop loop) {
// NOOP
}
@Override
public void clear() {
// NOOP
}
@Override
public boolean clear(String hostname) {
return false;
}
}