2017-02-02 10:32:33 +01:00
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/*
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* Copyright 2017 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.resolver.dns;
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import io.netty.util.internal.UnstableApi;
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/**
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* Provides an opportunity to override which {@link DnsServerAddressStream} is used to resolve a specific hostname.
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* <p>
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* For example this can be used to represent <a href="https://linux.die.net/man/5/resolver">/etc/resolv.conf</a> and
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* <a href="https://developer.apple.com/legacy/library/documentation/Darwin/Reference/ManPages/man5/resolver.5.html">
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* /etc/resolver</a>.
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*/
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@UnstableApi
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public interface DnsServerAddressStreamProvider {
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/**
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* Ask this provider for the name servers to query for {@code hostname}.
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* @param hostname The hostname for which to lookup the DNS server addressed to use.
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2017-03-31 02:02:16 +02:00
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* If this is the final {@link DnsServerAddressStreamProvider} to be queried then generally empty
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* string or {@code '.'} correspond to the default {@link DnsServerAddressStream}.
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* @return The {@link DnsServerAddressStream} which should be used to resolve {@code hostname}.
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2017-02-02 10:32:33 +01:00
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*/
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DnsServerAddressStream nameServerAddressStream(String hostname);
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}
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