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/*
* Copyright (c) 2013 Cisco Systems, Inc. and others. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 which accompanies this distribution,
* and is available at http://www.eclipse.org/legal/epl-v10.html
*/
package org.onap.ccsdk.sli.plugins.fabricdiscovery;
import io.netty.bootstrap.Bootstrap;
import io.netty.buffer.Unpooled;
import io.netty.channel.Channel;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.http.HttpClientCodec;
import io.netty.handler.codec.http.HttpObjectAggregator;
import io.netty.handler.codec.http.websocketx.CloseWebSocketFrame;
import io.netty.handler.codec.http.websocketx.PingWebSocketFrame;
import io.netty.handler.codec.http.websocketx.TextWebSocketFrame;
import io.netty.handler.codec.http.websocketx.WebSocketClientHandshakerFactory;
import io.netty.handler.codec.http.websocketx.WebSocketVersion;
import java.net.URI;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class WebSocketClient {
private static final Logger LOG = LoggerFactory.getLogger(WebSocketClient.class);
private final URI uri;
private final Bootstrap bootstrap = new Bootstrap();
private final WebSocketClientHandler clientHandler;
private Channel clientChannel;
private final EventLoopGroup group = new NioEventLoopGroup();
public WebSocketClient(final URI uri, final IClientMessageCallback clientMessageCallback) {
this.uri = uri;
clientHandler = new WebSocketClientHandler(WebSocketClientHandshakerFactory.newHandshaker(uri,
WebSocketVersion.V13, null, false, null), clientMessageCallback);
// last null could be replaced with DefaultHttpHeaders
initialize();
}
public void initialize() {
String protocol = uri.getScheme();
if (!"ws".equals(protocol)) {
throw new IllegalArgumentException("Unsupported protocol: " + protocol);
}
bootstrap.group(group).channel(NioSocketChannel.class).handler(new ChannelInitializer<SocketChannel>() {
@Override
public void initChannel(final SocketChannel ch) throws Exception {
ChannelPipeline pipeline = ch.pipeline();
pipeline.addLast("http-codec", new HttpClientCodec());
pipeline.addLast("aggregator", new HttpObjectAggregator(8192));
pipeline.addLast("ws-handler", clientHandler);
}
});
}
public void connect() throws InterruptedException {
LOG.info("WebSocket Client connecting");
clientChannel = bootstrap.connect(uri.getHost(), uri.getPort()).sync().channel();
clientHandler.handshakeFuture().sync();
}
public void writeAndFlush(final String message) {
clientChannel.writeAndFlush(new TextWebSocketFrame(message));
}
public void writeAndFlush(final Object message) {
clientChannel.writeAndFlush(message);
}
public void ping() {
clientChannel.writeAndFlush(new PingWebSocketFrame(Unpooled.copiedBuffer(new byte[] { 1, 2, 3, 4, 5, 6 })));
}
public void close(final String reasonText) throws InterruptedException {
CloseWebSocketFrame closeWebSocketFrame = new CloseWebSocketFrame(1000, reasonText);
clientChannel.writeAndFlush(closeWebSocketFrame);
// WebSocketClientHandler will close the connection when the server
// responds to the CloseWebSocketFrame.
clientChannel.closeFuture().sync();
group.shutdownGracefully();
}
}
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