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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 2017 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.ChannelFuture;
import io.netty.handler.codec.dns.DnsQuestion;
import io.netty.handler.codec.dns.DnsResponseCode;
import io.netty.util.internal.UnstableApi;

import java.net.InetSocketAddress;
import java.util.List;

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

/**
 * Combines two {@link DnsQueryLifecycleObserver} into a single {@link DnsQueryLifecycleObserver}.
 */
@UnstableApi
public final class BiDnsQueryLifecycleObserver implements DnsQueryLifecycleObserver {
    private final DnsQueryLifecycleObserver a;
    private final DnsQueryLifecycleObserver b;

    /**
     * Create a new instance.
     * @param a The {@link DnsQueryLifecycleObserver} that will receive events first.
     * @param b The {@link DnsQueryLifecycleObserver} that will receive events second.
     */
    public BiDnsQueryLifecycleObserver(DnsQueryLifecycleObserver a, DnsQueryLifecycleObserver b) {
        this.a = checkNotNull(a, "a");
        this.b = checkNotNull(b, "b");
    }

    @Override
    public void queryWritten(InetSocketAddress dnsServerAddress, ChannelFuture future) {
        try {
            a.queryWritten(dnsServerAddress, future);
        } finally {
            b.queryWritten(dnsServerAddress, future);
        }
    }

    @Override
    public void queryCancelled(int queriesRemaining) {
        try {
            a.queryCancelled(queriesRemaining);
        } finally {
            b.queryCancelled(queriesRemaining);
        }
    }

    @Override
    public DnsQueryLifecycleObserver queryRedirected(List nameServers) {
        try {
            a.queryRedirected(nameServers);
        } finally {
            b.queryRedirected(nameServers);
        }
        return this;
    }

    @Override
    public DnsQueryLifecycleObserver queryCNAMEd(DnsQuestion cnameQuestion) {
        try {
            a.queryCNAMEd(cnameQuestion);
        } finally {
            b.queryCNAMEd(cnameQuestion);
        }
        return this;
    }

    @Override
    public DnsQueryLifecycleObserver queryNoAnswer(DnsResponseCode code) {
        try {
            a.queryNoAnswer(code);
        } finally {
            b.queryNoAnswer(code);
        }
        return this;
    }

    @Override
    public void queryFailed(Throwable cause) {
        try {
            a.queryFailed(cause);
        } finally {
            b.queryFailed(cause);
        }
    }

    @Override
    public void querySucceed() {
        try {
            a.querySucceed();
        } finally {
            b.querySucceed();
        }
    }
}