nettyTimeServerDemo.TimeServerHandler.java Source code

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Here is the source code for nettyTimeServerDemo.TimeServerHandler.java

Source

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package nettyTimeServerDemo;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerAdapter;
import io.netty.channel.ChannelHandlerContext;
import static java.lang.System.currentTimeMillis;

/**
 *
 * @author allen
 */
public class TimeServerHandler extends ChannelHandlerAdapter {

    private int counter;

    public TimeServerHandler() {
        counter = 0;
    } //TimeServerHandler()

    /**
     *
     * @param ctx
     * @param msg
     * @throws Exception
     */
    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        /*
        ByteBuf buf = (ByteBuf) msg;
        byte[] req = new byte[buf.readableBytes()];
        buf.readBytes(req);
                
        String body = new String(req, "UTF-8").substring(0, req.length - System.getProperty("line.separator").length());
        */

        String body = (String) msg;

        System.out.println("The time server receive order : " + body + " ; the counter is : " + ++counter);

        String currentTime = "QUERY TIME ORDER".equalsIgnoreCase(body)
                ? new java.util.Date(currentTimeMillis()).toString()
                : "BAD ORDER";
        currentTime += System.getProperty("line.separator");

        ByteBuf resp = Unpooled.copiedBuffer(currentTime.getBytes());
        ctx.write(resp);
    } //channelRead()

    /**
     *
     * @param ctx
     * @throws Exception
     */
    @Override
    public void channelReadComplete(ChannelHandlerContext ctx) throws Exception {
        ctx.flush();
    } //channelReadComplete()        

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

} //TimeServerHandler