com.relayrides.pushy.apns.MockFeedbackServer.java Source code

Introduction

Here is the source code for com.relayrides.pushy.apns.MockFeedbackServer.java

Source

/* Copyright (c) 2013 RelayRides
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package com.relayrides.pushy.apns;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.buffer.ByteBuf;
import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.MessageToByteEncoder;
import io.netty.handler.ssl.SslHandler;
import io.netty.util.concurrent.Future;
import io.netty.util.concurrent.GenericFutureListener;

import java.util.ArrayList;
import java.util.List;

public class MockFeedbackServer {

    private final int port;
    private final NioEventLoopGroup eventLoopGroup;

    private final ArrayList<ExpiredToken> expiredTokens = new ArrayList<ExpiredToken>();

    private volatile boolean closeWhenDone = false;

    private Channel channel;

    private class ExpiredTokenEncoder extends MessageToByteEncoder<ExpiredToken> {

        @Override
        protected void encode(final ChannelHandlerContext context, final ExpiredToken expiredToken,
                final ByteBuf out) {
            out.writeInt((int) (expiredToken.getExpiration().getTime() / 1000L));
            out.writeShort(expiredToken.getToken().length);
            out.writeBytes(expiredToken.getToken());
        }
    }

    private class MockFeedbackServerHandler extends ChannelInboundHandlerAdapter {

        private final MockFeedbackServer feedbackServer;

        public MockFeedbackServerHandler(final MockFeedbackServer feedbackServer) {
            this.feedbackServer = feedbackServer;
        }

        @Override
        public void channelActive(final ChannelHandlerContext context) {

            context.pipeline().get(SslHandler.class).handshakeFuture()
                    .addListener(new GenericFutureListener<Future<Channel>>() {

                        public void operationComplete(final Future<Channel> future) {
                            if (future.isSuccess()) {
                                final List<ExpiredToken> expiredTokens = feedbackServer
                                        .getAndClearAllExpiredTokens();

                                ChannelFuture lastWriteFuture = null;

                                for (final ExpiredToken expiredToken : expiredTokens) {
                                    lastWriteFuture = context.write(expiredToken);
                                }

                                if (feedbackServer.closeWhenDone) {
                                    if (lastWriteFuture != null) {
                                        lastWriteFuture.addListener(ChannelFutureListener.CLOSE);
                                    } else {
                                        context.close();
                                    }
                                }

                                context.flush();
                            } else {
                                throw new RuntimeException("Failed to complete TLS handshake.", future.cause());
                            }
                        }
                    });
        }
    }

    public MockFeedbackServer(final int port) {
        this(port, null);
    }

    public MockFeedbackServer(final int port, final NioEventLoopGroup eventLoopGroup) {
        this.port = port;
        this.eventLoopGroup = eventLoopGroup;
    }

    public synchronized void start() throws InterruptedException {
        final ServerBootstrap bootstrap = new ServerBootstrap();

        bootstrap.group(this.eventLoopGroup);
        bootstrap.channel(NioServerSocketChannel.class);

        final MockFeedbackServer server = this;
        bootstrap.childHandler(new ChannelInitializer<SocketChannel>() {

            @Override
            protected void initChannel(final SocketChannel channel) throws Exception {
                channel.pipeline().addLast("ssl", new SslHandler(SSLTestUtil.createSSLEngineForMockServer()));
                channel.pipeline().addLast("encoder", new ExpiredTokenEncoder());
                channel.pipeline().addLast("handler", new MockFeedbackServerHandler(server));
            }
        });

        this.channel = bootstrap.bind(this.port).await().channel();
    }

    public synchronized void shutdown() throws InterruptedException {
        if (this.channel != null) {
            this.channel.close().await();
        }

        this.closeWhenDone = true;
        this.expiredTokens.clear();
        this.channel = null;
    }

    public synchronized void addExpiredToken(final ExpiredToken expiredToken) {
        this.expiredTokens.add(expiredToken);
    }

    private synchronized List<ExpiredToken> getAndClearAllExpiredTokens() {
        final ArrayList<ExpiredToken> tokensToReturn = new ArrayList<ExpiredToken>(this.expiredTokens);
        this.expiredTokens.clear();

        return tokensToReturn;
    }

    public void setCloseWhenDone(final boolean closeWhenDone) {
        this.closeWhenDone = closeWhenDone;
    }
}