InflightNameResolver.java — netty Source File

Source Code

/*
 * Copyright 2016 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.dns;

import io.netty.resolver.NameResolver;
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.StringUtil;

import java.util.List;
import java.util.concurrent.ConcurrentMap;

import static io.netty.util.internal.ObjectUtil.checkNotNull;

// FIXME(trustin): Find a better name and move it to the 'resolver' module.
final class InflightNameResolver<T> implements NameResolver<T> {

    private final EventExecutor executor;
    private final NameResolver<T> delegate;
    private final ConcurrentMap<String, Promise<T>> resolvesInProgress;
    private final ConcurrentMap<String, Promise<List<T>>> resolveAllsInProgress;

    InflightNameResolver(EventExecutor executor, NameResolver<T> delegate,
                         ConcurrentMap<String, Promise<T>> resolvesInProgress,
                         ConcurrentMap<String, Promise<List<T>>> resolveAllsInProgress) {

        this.executor = checkNotNull(executor, "executor");
        this.delegate = checkNotNull(delegate, "delegate");
        this.resolvesInProgress = checkNotNull(resolvesInProgress, "resolvesInProgress");
        this.resolveAllsInProgress = checkNotNull(resolveAllsInProgress, "resolveAllsInProgress");
    }

    @Override
    public Future<T> resolve(String inetHost) {
        return resolve(inetHost, executor.<T>newPromise());
    }

    @Override
    public Future<List<T>> resolveAll(String inetHost) {
        return resolveAll(inetHost, executor.<List<T>>newPromise());
    }

    @Override
    public void close() {
// ... (62 more lines)