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Reactive Streams Netty driver

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/*
 * Copyright (c) 2011-2019 Pivotal Software Inc, All Rights Reserved.
 *
 * Licensed 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 reactor.netty.udp;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.EventLoopGroup;
import reactor.core.publisher.Mono;
import reactor.netty.Connection;
import reactor.netty.resources.ConnectionProvider;
import reactor.netty.resources.LoopResources;

/**
 * @author Stephane Maldini
 */
final class UdpClientConnect extends UdpClient {

	static final UdpClientConnect INSTANCE = new UdpClientConnect();

	@Override
	protected Mono connect(Bootstrap b) {
		//Default group and channel
		if (b.config()
				.group() == null) {

			UdpResources loopResources = UdpResources.get();
			EventLoopGroup elg = loopResources.onClient(LoopResources.DEFAULT_NATIVE);

			b.group(elg)
			 .channel(loopResources.onDatagramChannel(elg));
		}

		return ConnectionProvider.newConnection()
		                         .acquire(b);
	}
}