io.netty.resolver.DefaultNameResolver Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
/*
* 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:
*
* 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;
import io.netty.util.internal.SocketUtils;
import io.netty.util.concurrent.EventExecutor;
import io.netty.util.concurrent.Promise;
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.
*/
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);
}
}
}