/*
 * Copyright 2011-2016 the original author or authors.
 *
 * 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
 *
 *      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.lettuce.core.server;

import java.util.concurrent.TimeUnit;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.*;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;

/**
 * Tiny netty server to generate random base64 data on message reception.
 *
 * @author Mark Paluch
 */
public class RandomResponseServer {

    private EventLoopGroup bossGroup;
    private EventLoopGroup workerGroup;
    private Channel channel;

    public void initialize(int port) throws InterruptedException {

        bossGroup = new NioEventLoopGroup(1);
        workerGroup = new NioEventLoopGroup();

        ServerBootstrap b = new ServerBootstrap();
        b.group(bossGroup, workerGroup).channel(NioServerSocketChannel.class).option(ChannelOption.SO_BACKLOG, 100)
                .childHandler(new ChannelInitializer<SocketChannel>() {
                    @Override
                    public void initChannel(SocketChannel ch) throws Exception {
                        ChannelPipeline p = ch.pipeline();
                        // p.addLast(new LoggingHandler(LogLevel.INFO));
                        p.addLast(new RandomServerHandler());
                    }
                });

        // Start the server.
        ChannelFuture f = b.bind(port).sync();

        channel = f.channel();
    }

    public void shutdown() {
        channel.close();
        bossGroup.shutdownGracefully(100, 100, TimeUnit.MILLISECONDS);
        workerGroup.shutdownGracefully(100, 100, TimeUnit.MILLISECONDS);
    }
}

/*
 * Copyright 2011-2016 the original author or authors.
 *
 * 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
 *
 *      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.lettuce.core.server;

import java.util.concurrent.TimeUnit;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.*;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;

/**
 * Tiny netty server to generate random base64 data on message reception.
 *
 * @author Mark Paluch
 */
public class RandomResponseServer {

    private EventLoopGroup bossGroup;
    private EventLoopGroup workerGroup;
    private Channel channel;

    public void initialize(int port) throws InterruptedException {

        bossGroup = Resources.bossGroup;
        workerGroup = Resources.workerGroup;

        ServerBootstrap b = new ServerBootstrap();
        b.group(bossGroup, workerGroup).channel(NioServerSocketChannel.class).option(ChannelOption.SO_BACKLOG, 100)
                .childHandler(new ChannelInitializer<SocketChannel>() {
                    @Override
                    public void initChannel(SocketChannel ch) throws Exception {
                        ChannelPipeline p = ch.pipeline();
                        // p.addLast(new LoggingHandler(LogLevel.INFO));
                        p.addLast(new RandomServerHandler());
                    }
                });

        // Start the server.
        ChannelFuture f = b.bind(port).sync();

        channel = f.channel();
    }

    public void shutdown() {
        channel.close();
    }

    private static class Resources {

        private static final EventLoopGroup bossGroup;
        private static final EventLoopGroup workerGroup;

        static {
            bossGroup = new NioEventLoopGroup(1);
            workerGroup = new NioEventLoopGroup();

            Runtime.getRuntime().addShutdownHook(new Thread(() -> {
                bossGroup.shutdownGracefully(0, 0, TimeUnit.MILLISECONDS);
                workerGroup.shutdownGracefully(0, 0, TimeUnit.MILLISECONDS);

            }, "RandomResponseServer-shutdown"));
        }

    }
}

Improve test server resource handling