com.barchart.netty.server.http.websocket.WebSocketHandler.java Source code

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Here is the source code for com.barchart.netty.server.http.websocket.WebSocketHandler.java

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/**
 * Copyright (C) 2011-2014 Barchart, Inc. <http://www.barchart.com/>
 *
 * All rights reserved. Licensed under the OSI BSD License.
 *
 * http://www.opensource.org/licenses/bsd-license.php
 */
package com.barchart.netty.server.http.websocket;

import com.barchart.netty.common.pipeline.PipelineInitializer;

import io.netty.channel.ChannelHandlerAdapter;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelHandler.Sharable;

/**
 * Convenience class for wrapping an existing server pipeline initializer in a
 * ChannelHandler suitable for use as a websocket handler in HttpServer.
 * 
 * This assumes that the pipeline is using addLast() to add all handlers; if you
 * are doing any custom pipeline organization, you should wrap your own web
 * socket handler.
 * 
 * In particular, this means that wrapped pipelines must not include any TLS
 * negotiation, since websockets leaves that up to HTTP/SSL.
 */
@Sharable
public class WebSocketHandler extends ChannelHandlerAdapter {

    PipelineInitializer initializer;

    public WebSocketHandler(final PipelineInitializer initializer_) {
        initializer = initializer_;
    }

    @Override
    public void handlerAdded(final ChannelHandlerContext ctx) throws Exception {
        initializer.initPipeline(ctx.pipeline());
        ctx.pipeline().remove(this);
    }

}