c1b1d6268a
Motivation: At the moment there is not way for the user to know if resolving a domain was failed because the domain was unkown or because of an IO error / timeout. If it was caused by an timeout / IO error the user may want to retry the query. Also if the query was failed because of an IO error / timeout we should not cache it. Modifications: - Add DnsNameResolverTimeoutException and include it in the UnkownHostException if the domain could not be resolved because of an timeout. This will allow the user to retry the query when inspecting the cause. - Do not cache IO errors / timeouts - Add unit test Result: Easier for users to implement retries for DNS querys and not cache IO errors / timeouts.
36 lines
1.3 KiB
Java
36 lines
1.3 KiB
Java
/*
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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.handler.codec.dns.DnsQuestion;
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import io.netty.util.internal.UnstableApi;
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import java.net.InetSocketAddress;
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/**
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* A {@link DnsNameResolverException} raised when {@link DnsNameResolver} failed to perform a successful query because
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* of an timeout. In this case you may want to retry the operation.
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*/
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@UnstableApi
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public final class DnsNameResolverTimeoutException extends DnsNameResolverException {
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private static final long serialVersionUID = -8826717969627131854L;
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public DnsNameResolverTimeoutException(
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InetSocketAddress remoteAddress, DnsQuestion question, String message) {
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super(remoteAddress, question, message);
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}
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}
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