ObjectEchoClientHandler Class — netty Architecture

Source Code

example/src/main/java/io/netty/example/objectecho/ObjectEchoClientHandler.java lines 32–69

public class ObjectEchoClientHandler extends ChannelInboundHandlerAdapter {

    private final List<Integer> firstMessage;

    /**
     * Creates a client-side handler.
     */
    public ObjectEchoClientHandler() {
        firstMessage = new ArrayList<Integer>(ObjectEchoClient.SIZE);
        for (int i = 0; i < ObjectEchoClient.SIZE; i ++) {
            firstMessage.add(Integer.valueOf(i));
        }
    }

    @Override
    public void channelActive(ChannelHandlerContext ctx) {
        // Send the first message if this handler is a client-side handler.
        ChannelFuture future = ctx.writeAndFlush(firstMessage);
        future.addListener(FIRE_EXCEPTION_ON_FAILURE); // Let object serialisation exceptions propagate.
    }

    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) {
        // Echo back the received object to the server.
        ctx.write(msg);
    }

    @Override
    public void channelReadComplete(ChannelHandlerContext ctx) {
        ctx.flush();
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
        cause.printStackTrace();
        ctx.close();
    }
}