io.netty.resolver.DefaultNameResolver Maven / Gradle / Ivy
/*
* Copyright 2015 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;
import io.netty.util.internal.SocketUtils;
import io.netty.util.concurrent.EventExecutor;
import io.netty.util.concurrent.Promise;
import io.netty.util.internal.UnstableApi;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.Arrays;
import java.util.List;
/**
* A {@link InetNameResolver} that resolves using JDK's built-in domain name lookup mechanism.
* Note that this resolver performs a blocking name lookup from the caller thread.
*/
@UnstableApi
public class DefaultNameResolver extends InetNameResolver {
public DefaultNameResolver(EventExecutor executor) {
super(executor);
}
@Override
protected void doResolve(String inetHost, Promise promise) throws Exception {
try {
promise.setSuccess(SocketUtils.addressByName(inetHost));
} catch (UnknownHostException e) {
promise.setFailure(e);
}
}
@Override
protected void doResolveAll(String inetHost, Promise> promise) throws Exception {
try {
promise.setSuccess(Arrays.asList(SocketUtils.allAddressesByName(inetHost)));
} catch (UnknownHostException e) {
promise.setFailure(e);
}
}
}