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This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging 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).

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/*
 * 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:
 *
 *   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.dns;

import io.netty.channel.ChannelFactory;
import io.netty.channel.EventLoop;
import io.netty.channel.socket.DatagramChannel;
import io.netty.resolver.AddressResolver;
import io.netty.resolver.AddressResolverGroup;
import io.netty.resolver.NameResolver;
import io.netty.resolver.RoundRobinInetAddressResolver;
import io.netty.util.internal.UnstableApi;

import java.net.InetAddress;
import java.net.InetSocketAddress;

/**
 * A {@link AddressResolverGroup} of {@link DnsNameResolver}s that supports random selection of destination addresses if
 * multiple are provided by the nameserver. This is ideal for use in applications that use a pool of connections, for
 * which connecting to a single resolved address would be inefficient.
 */
@UnstableApi
public class RoundRobinDnsAddressResolverGroup extends DnsAddressResolverGroup {

    public RoundRobinDnsAddressResolverGroup(DnsNameResolverBuilder dnsResolverBuilder) {
        super(dnsResolverBuilder);
    }

    public RoundRobinDnsAddressResolverGroup(
            Class channelType,
            DnsServerAddressStreamProvider nameServerProvider) {
        super(channelType, nameServerProvider);
    }

    public RoundRobinDnsAddressResolverGroup(
            ChannelFactory channelFactory,
            DnsServerAddressStreamProvider nameServerProvider) {
        super(channelFactory, nameServerProvider);
    }

    /**
     * We need to override this method, not
     * {@link #newNameResolver(EventLoop, ChannelFactory, DnsServerAddressStreamProvider)},
     * because we need to eliminate possible caching of {@link io.netty.resolver.NameResolver#resolve}
     * by {@link InflightNameResolver} created in
     * {@link #newResolver(EventLoop, ChannelFactory, DnsServerAddressStreamProvider)}.
     */
    @Override
    protected final AddressResolver newAddressResolver(EventLoop eventLoop,
                                                                          NameResolver resolver)
            throws Exception {
        return new RoundRobinInetAddressResolver(eventLoop, resolver).asAddressResolver();
    }
}