io.netty.resolver.dns.BiDnsQueryLifecycleObserverFactory Maven / Gradle / Ivy
/*
* Copyright 2017 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.handler.codec.dns.DnsQuestion;
import io.netty.util.internal.UnstableApi;
import static io.netty.util.internal.ObjectUtil.checkNotNull;
/**
* Combines two {@link DnsQueryLifecycleObserverFactory} into a single {@link DnsQueryLifecycleObserverFactory}.
*/
@UnstableApi
public final class BiDnsQueryLifecycleObserverFactory implements DnsQueryLifecycleObserverFactory {
private final DnsQueryLifecycleObserverFactory a;
private final DnsQueryLifecycleObserverFactory b;
/**
* Create a new instance.
* @param a The {@link DnsQueryLifecycleObserverFactory} that will receive events first.
* @param b The {@link DnsQueryLifecycleObserverFactory} that will receive events second.
*/
public BiDnsQueryLifecycleObserverFactory(DnsQueryLifecycleObserverFactory a, DnsQueryLifecycleObserverFactory b) {
this.a = checkNotNull(a, "a");
this.b = checkNotNull(b, "b");
}
@Override
public DnsQueryLifecycleObserver newDnsQueryLifecycleObserver(DnsQuestion question) {
return new BiDnsQueryLifecycleObserver(a.newDnsQueryLifecycleObserver(question),
b.newDnsQueryLifecycleObserver(question));
}
}