WebSocketSendHandler.java

/*
 * Copyright 2013 The Netty Project
 *
 * The Netty Project 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 org.jboss.aerogear.io.netty.handler.codec.sockjs.transport;

import io.netty.channel.*;
import io.netty.handler.codec.http.websocketx.TextWebSocketFrame;
import org.jboss.aerogear.io.netty.handler.codec.sockjs.protocol.Frame;
import io.netty.util.ReferenceCountUtil;
import io.netty.util.internal.logging.InternalLogger;
import io.netty.util.internal.logging.InternalLoggerFactory;

class WebSocketSendHandler extends ChannelHandlerAdapter {
    private static final InternalLogger logger = InternalLoggerFactory.getInstance(WebSocketSendHandler.class);

    @Override
    public void write(final ChannelHandlerContext ctx, final Object msg, final ChannelPromise promise)
            throws Exception {
        if (msg instanceof Frame) {
            final Frame sockJsFrame = (Frame) msg;
            ctx.writeAndFlush(new TextWebSocketFrame(sockJsFrame.content().copy()))
                    .addListener(new ChannelFutureListener() {
                @Override
                public void operationComplete(final ChannelFuture future) throws Exception {
                    if (future.isSuccess()) {
                        promise.setSuccess();
                    }
                }
            });
            sockJsFrame.release();
        } else {
            ctx.write(ReferenceCountUtil.retain(msg), promise);
        }
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        logger.error("Caught : ", cause);
        super.exceptionCaught(ctx, cause);
    }

}