io.netty.resolver.dns.ThreadLocalNameServerAddressStream Maven / Gradle / Ivy
/*
* Copyright 2024 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.util.concurrent.FastThreadLocal;
import java.net.InetSocketAddress;
/**
* A thread local based address stream for a specific hostname.
*/
final class ThreadLocalNameServerAddressStream implements DnsServerAddressStream {
private final String hostname;
private final DnsServerAddressStreamProvider dnsServerAddressStreamProvider;
private final FastThreadLocal threadLocal = new FastThreadLocal() {
@Override
protected DnsServerAddressStream initialValue() {
return dnsServerAddressStreamProvider.nameServerAddressStream(hostname);
}
};
ThreadLocalNameServerAddressStream(DnsServerAddressStreamProvider dnsServerAddressStreamProvider) {
this(dnsServerAddressStreamProvider, "");
}
ThreadLocalNameServerAddressStream(DnsServerAddressStreamProvider dnsServerAddressStreamProvider, String hostname) {
this.dnsServerAddressStreamProvider = dnsServerAddressStreamProvider;
this.hostname = hostname;
}
@Override
public InetSocketAddress next() {
return threadLocal.get().next();
}
@Override
public DnsServerAddressStream duplicate() {
return new ThreadLocalNameServerAddressStream(dnsServerAddressStreamProvider, hostname);
}
@Override
public int size() {
return threadLocal.get().size();
}
}