com.zextras.modules.chat.server.LocalXmppConnectionProviderImpl.java Source code

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Here is the source code for com.zextras.modules.chat.server.LocalXmppConnectionProviderImpl.java

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/*
 * Copyright (C) 2017 ZeXtras S.r.l.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation, version 2 of
 * the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License.
 * If not, see <http://www.gnu.org/licenses/>.
 */

package com.zextras.modules.chat.server;

import com.google.inject.Inject;
import com.zextras.lib.ZimbraSSLContextProvider;
import io.netty.bootstrap.Bootstrap;
import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOutboundHandlerAdapter;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.ssl.SslHandler;

import javax.net.ssl.SSLEngine;
import java.io.IOException;

public class LocalXmppConnectionProviderImpl implements LocalXmppConnectionProvider {
    private final ZimbraSSLContextProvider mZimbraSSLContextProvider;

    @Inject
    public LocalXmppConnectionProviderImpl(ZimbraSSLContextProvider zimbraSSLContextProvider) {
        mZimbraSSLContextProvider = zimbraSSLContextProvider;
    }

    @Override
    public Channel openConnection(String host, int port, final ChannelHandler channelHandler) throws IOException {
        ChannelHandler handler = new ChannelInitializer<SocketChannel>() {
            @Override
            protected void initChannel(SocketChannel socketChannel) throws Exception {
                SSLEngine sslEngine = mZimbraSSLContextProvider.get().createSSLEngine();
                sslEngine.setUseClientMode(true);
                SslHandler sslHandler = new SslHandler(sslEngine);
                socketChannel.pipeline().addFirst("ssl", sslHandler);
                socketChannel.pipeline().addLast("handler", channelHandler);
            }
        };
        ChannelFuture channelFuture = new Bootstrap().channel(NioSocketChannel.class).group(new NioEventLoopGroup())
                .handler(handler).connect(host, port);

        try {
            channelFuture.sync();
            if (!channelFuture.isSuccess()) {
                throw channelFuture.cause();
            }

            return channelFuture.channel();
        } catch (Throwable t) {
            throw new IOException(t);
        }
    }
}