ch.cern.hbase.thirdparty.io.netty.resolver.dns.DnsServerAddressStream Maven / Gradle / Ivy

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/*
 * 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 ch.cern.hbase.thirdparty.io.netty.resolver.dns;

import ch.cern.hbase.thirdparty.io.netty.util.internal.UnstableApi;

import java.net.InetSocketAddress;

/**
 * An infinite stream of DNS server addresses.
 */
@UnstableApi
public interface DnsServerAddressStream {
    /**
     * Retrieves the next DNS server address from the stream.
     */
    InetSocketAddress next();

    /**
     * Get the number of times {@link #next()} will return a distinct element before repeating or terminating.
     * @return the number of times {@link #next()} will return a distinct element before repeating or terminating.
     */
    int size();

    /**
     * Duplicate this object. The result of this should be able to be independently iterated over via {@link #next()}.
     * 
     * Note that {@link #clone()} isn't used because it may make sense for some implementations to have the following
     * relationship {@code x.duplicate() == x}.
     * @return A duplicate of this object.
     */
    DnsServerAddressStream duplicate();
}