Java tutorial
/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package com.neoba.messages; import com.neoba.Constants; import com.neoba.Dsyncserver; import io.netty.buffer.ByteBuf; import static io.netty.buffer.Unpooled.buffer; import java.util.UUID; import org.apache.log4j.Logger; /** * * @author Atul Vinayak */ public class UserLogoutMessage { private boolean session_not_found; Logger logger = Logger.getLogger(UserLogoutMessage.class); public UserLogoutMessage(UUID sessid) { if (Dsyncserver.usersessions.containsKey(sessid)) { Dsyncserver.usersessions.remove(sessid); Dsyncserver.useragents.remove(sessid); } else { session_not_found = true; logger.error(sessid + " no such session"); } logger.debug(sessid + " current sessions- " + Dsyncserver.usersessions.get(sessid)); logger.debug(sessid + " and useragents- " + Dsyncserver.useragents.get(sessid)); } public ByteBuf result() { ByteBuf reply = buffer(6); reply.writeByte(Constants.VERSION); reply.writeByte(Constants.LOGOUT); if (session_not_found) { reply.writeInt(Constants.W_ERR_SESSION_NOT_FOUND); } else { reply.writeInt(Constants.W_SUCCESS); } return reply; } }