老平臺已死，整理個文檔留下作記念

1，平臺的服務器總體架構

2，項目結構

3，業務結構

4，技術實現

5，業務舉例

登陸頁：

登陸：

其它的服務只是業務不一樣，這裏省略...

6，應用的啓動過程資源準備

7，json的封裝

public static void CrossDomain2(HttpServletResponse response, HttpServletRequest request, Object msg) throws IOException {

        response.setContentType("application/json");

        final String call = request.getParameter("callBack");

        final ObjectMapper mapper = new ObjectMapper();

        String resp = mapper.writeValueAsString(msg);

        if (!Strings.isNullOrEmpty(call)) {resp = call + "(" + resp + ")";}

        PrintWriter out = response.getWriter();

        out.write(resp);

        out.flush();

        out.close(); }

8，cookie域的算法

//構造cookie

final long time = System.currentTimeMillis();

        String userId = String.valueOf(uid);

        String USERINFO = userId + "," + userName + "," + time;

        String u = Base64.encode(USERINFO + "," +

                buildUserInfoSign(String.valueOf(userId), userName, String.valueOf(time)));

        u = URLEncoder.encode(u, "utf-8");

        String key = URLEncoder.encode(Base64.encode("USERINFO"), "UTF-8");

        Cookie cookie = new Cookie(key, u);

//構造cookie加密部分

    public static String buildUserInfoSign(String id, String name, String time) {

        String userInfoSrc = id + name + time;

        String key = ConfigurationUtils.get("login.cookieKey");

        String userInfo = userInfoSrc + key;

        String md5UserInfo = MD5Utils.digestAsHex(userInfo);

        return md5UserInfo;

    }

//解析cookie

public static int getUserId(HttpServletRequest request) {

        int userId = 0;

        String value = getCookieValueByKey(request);

        if (!Strings.isNullOrEmpty(value)) {

            String val[] = value.split(",");

            userId = Integer.parseInt(val[0]);

        }

        return userId;

}

public static String getCookieValueByKey(HttpServletRequest request) {

        String value = "";

        Cookie[] cookies = request.getCookies();

        String name = "USERINFO";

        try {

            name = Base64.encode(name);

            name = URLEncoder.encode(name, "utf-8");

        } catch (Exception e) {

            log.error("USERINFO解碼出錯!{}", e.getMessage());

        }

        if (cookies != null && cookies.length > 0) {

            for (Cookie cookie : cookies) {

                String nameStr = cookie.getName();

                if (nameStr.equals(name)) {

                    value = cookie.getValue();

                    break;

                }

            }

        }

        if (!Strings.isNullOrEmpty(value)) {

            try {

                value = URLDecoder.decode(value, "UTF-8");

                value = Base64.decode2Str(value);

            } catch (Exception e) {

                log.error("URL解碼出錯!{}", e.getMessage());

            }

            String val[] = value.split(",");

            String sign = buildUserInfoSign(val[0], val[1], val[2]);

            if (!Strings.isNullOrEmpty(sign) && !Strings.isNullOrEmpty(val[3]) && sign.equals(val[3])) {

                return value;

            } else {

                return "";}

        }

        return "";

    }

9,http的理解和封裝

public class HeadlessServlet extends HttpServlet implements InjectionProxy

裏面加了一個對自定以的註解的過濾；

protected boolean filters(final HeadlessServletRequest request, final HeadlessServletResponse response) throws ServletException, IOException {

        final Parameter parameter = this.getClass().getAnnotation(Parameter.class);

        if (null == parameter)

            return true;// filter methods

if (!Strings.isNullOrEmpty(parameter.method()) && !request.getMethod().equalsIgnoreCase(parameter.method())) {

            notFound(response);

            return false;

        }

        // filter parameters

        boolean flag = true, emptyCheck = false;

        try {

            final Map<String, String[]> parameterMap = request.getParameterMap();

            for (String name : parameter.value()) {

                if (name.endsWith(":")) {

                    name = name.substring(0, name.length() - 1);

                    emptyCheck = true;

                }

                flag = parameterMap.containsKey(name);

                if (emptyCheck) {

                    // must has parameter.

                    flag = flag && parameterMap.get(name) != null;

                    flag = flag && parameterMap.get(name).length > 0;

                    flag = flag && !Strings.isNullOrEmpty(parameterMap.get(name)[0]);

                }

                if (!flag)

                    break;

                emptyCheck = false;

            }

            return flag;

        } finally {

            if (!flag) {

                response.sendInvalidParameters();

            }

        }

    }

10，db設計

11，老平臺小結

老平臺採用的架構很簡單，一個Guice+Servlet，簡單的把一個url映射到一個特定的Servlet, 這裏借用Guice-servlet，省去了原生的servlet配置文件複雜的嫌疑，簡單的使用Guice容器， 把所需資源按照分類和層級一一放到容器中初始化，簡化了實例化的過程，提升了效率；業 務也不復雜，很容易從其它的遊戲平臺移植過來，業務的技術難點有兩個，一個是跟其它服 務器的交互和通訊，另一個是緩存的使用；對於跟其它服務器的交互，主要是基於http 請求，若是對這一部分比較熟悉，只要文檔給的比較規範，開發和調試起來仍是徹底沒有問 題的；而後是緩存的問題，這裏主要使用的Redis，一個key-value數據庫，經過把常常用的 數據從db中查詢出來，放到redis裏面，須要的時候從redis裏面取得，這大大提高了性能， 若是redis不穩定，能夠直接從db裏取得，保證了程序的健壯性；暫未進行過併發性測試， 目前能支撐2000w用戶的使用已經算是一個還不錯的架構。