/* * 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.concurrent.EventExecutor; import io.netty.util.concurrent.Future; import io.netty.util.concurrent.FutureListener; import io.netty.util.concurrent.Promise; import io.netty.util.internal.UnstableApi; import java.net.InetAddress; import java.net.InetSocketAddress; import java.util.ArrayList; import java.util.List; /** * A {@link AbstractAddressResolver} that resolves {@link InetSocketAddress}. */ @UnstableApi public class InetSocketAddressResolver extends AbstractAddressResolver<InetSocketAddress> { final NameResolver<InetAddress> nameResolver; /** * @param executor the {@link EventExecutor} which is used to notify the listeners of the {@link Future} returned * by {@link #resolve(java.net.SocketAddress)} * @param nameResolver the {@link NameResolver} used for name resolution */ public InetSocketAddressResolver(EventExecutor executor, NameResolver<InetAddress> nameResolver) { super(executor, InetSocketAddress.class); this.nameResolver = nameResolver; } @Override protected boolean doIsResolved(InetSocketAddress address) { return !address.isUnresolved(); } @Override protected void doResolve(final InetSocketAddress unresolvedAddress, final Promise<InetSocketAddress> promise) throws Exception { // Note that InetSocketAddress.getHostName() will never incur a reverse lookup here, // because an unresolved address always has a host name. nameResolver.resolve(unresolvedAddress.getHostName()) .addListener(new FutureListener<InetAddress>() { @Override public void operationComplete(Future<InetAddress> future) throws Exception { if (future.isSuccess()) { promise.setSuccess(new InetSocketAddress(future.getNow(), unresolvedAddress.getPort())); } else { promise.setFailure(future.cause()); } } }); } @Override protected void doResolveAll(final InetSocketAddress unresolvedAddress, final Promise<List<InetSocketAddress>> promise) throws Exception { // Note that InetSocketAddress.getHostName() will never incur a reverse lookup here, // because an unresolved address always has a host name. nameResolver.resolveAll(unresolvedAddress.getHostName()) .addListener(new FutureListener<List<InetAddress>>() { @Override public void operationComplete(Future<List<InetAddress>> future) throws Exception { if (future.isSuccess()) { List<InetAddress> inetAddresses = future.getNow(); List<InetSocketAddress> socketAddresses = new ArrayList<InetSocketAddress>(inetAddresses.size()); for (InetAddress inetAddress : inetAddresses) { socketAddresses.add(new InetSocketAddress(inetAddress, unresolvedAddress.getPort())); } promise.setSuccess(socketAddresses); } else { promise.setFailure(future.cause()); } } }); } @Override public void close() { nameResolver.close(); } }