com.github.rmannibucau.featuredmock.http.DefaultFeaturedHttpServer.java Source code

Introduction

Here is the source code for com.github.rmannibucau.featuredmock.http.DefaultFeaturedHttpServer.java

Source

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF 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 com.github.rmannibucau.featuredmock.http;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelOption;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;

import javax.net.ssl.SSLEngine;
import java.io.IOException;
import java.net.ServerSocket;
import java.util.logging.Level;
import java.util.logging.Logger;

class DefaultFeaturedHttpServer implements FeaturedHttpServer {
    private static final Logger LOGGER = Logger.getLogger(FeaturedHttpServer.class.getName());

    private final String host;
    private final int port;
    private final int threads;
    private final ContentTypeMapper[] mappers;
    private final SSLEngine engine;

    private NioEventLoopGroup workerGroup;

    public DefaultFeaturedHttpServer(final String host, final int port, final int threads,
            final ContentTypeMapper[] mappers, final SSLEngine engine) {
        this.host = host;
        if (port <= 0) { // generate a port
            this.port = findNextAvailablePort();
        } else {
            this.port = port;
        }
        this.threads = Math.max(threads, 1);
        this.engine = engine;
        this.mappers = mappers;
    }

    @Override
    public int getPort() {
        return port;
    }

    private static int findNextAvailablePort() {
        ServerSocket serverSocket = null;
        try {
            serverSocket = new ServerSocket(0);
            return serverSocket.getLocalPort();
        } catch (final IOException e) {
            LOGGER.log(Level.SEVERE, e.getMessage(), e);
        } finally {
            if (serverSocket != null) {
                try {
                    serverSocket.close();
                } catch (final IOException e) {
                    // no-op
                }
            }
        }
        return 0;
    }

    @Override
    public FeaturedHttpServer start() {
        workerGroup = new NioEventLoopGroup(threads, new FeaturedThreadFactory());

        try {
            final ServerBootstrap bootstrap = new ServerBootstrap();
            bootstrap.option(ChannelOption.SO_REUSEADDR, true).option(ChannelOption.SO_SNDBUF, 1024)
                    .option(ChannelOption.TCP_NODELAY, true).group(workerGroup)
                    .channel(NioServerSocketChannel.class)
                    .childHandler(new FeaturedChannelInitializer(mappers, engine)).bind(host, port)
                    .addListener(new ChannelFutureListener() {
                        @Override
                        public void operationComplete(final ChannelFuture future) throws Exception {
                            if (!future.isSuccess()) {
                                LOGGER.severe("Can't start HTTP server");
                            } else {
                                LOGGER.info(String.format("Server started on http://%s:%s", host, port));
                            }
                        }
                    }).sync();
        } catch (final InterruptedException e) {
            LOGGER.log(Level.SEVERE, e.getMessage(), e);
        }

        return this;
    }

    @Override
    public void stop() {
        if (workerGroup != null) {
            workerGroup.shutdownGracefully();
            LOGGER.info(String.format("Server http://%s:%s stopped", host, port));
        }
    }
}