Introducing Myself

Wei Xia (夏桅 )Computer Software Professional

My Basic Data

• My name: Wei Xia• My gender: male• My hobbies: quite a lot• My date of birth: 1982-8-27• My constellation: Virgo• My degree: Bachelor, CS• Height: 176 cm• Weight: 66 kg• Health: excellent• Blood type: O• Marriage condition: married

2000 - Entering UESTC

• UESTC– University of Electronic Science and Technology– Located in Chengdu, Sichuan, P.R.China– One of the best colleges in south-west China

• College entrance exam– 570, the second highest score in my high school

• Start to learn programming– Pascal (a course in school)– HTML (built my first homepage website)– Java (tried to build a dynamic web page)

2002 - Entering Technical Office of News Center

• A small team to build and maintain the website and network– http://www.news.uestc.edu.cn/

• In the 2nd year I became the technical director• Technologies we used there

– ASP/VBScript (before 2002)– ASP.NET/C# (from 2003)– XML + XSL rendering– Web Service interface

• Technologies we learned there– C/C++/C#/XML/everything...

2003 - The Graduation Project

• A O/R mapping tool to generate class wrappers for database• Most DB operations won't need SQL querying• Tables and views are mapped with strong typed classes• Supported database

– SQL Server– Oracle– MySQL– PostgreSQL

• Supported language– C#– VB.NET– JScript

2003 - The Attempt to Start a Company

• An American investor wants to build a online C2C shopping system like today's Taobao in China

• We built a small team– I'm a PM and major developer– With a UI designer– Plus a junior tester

• Technologies used– ASP.NET, SQL Server, XML/XSL, customized protocol based on HTTP

(for bank interface), etc.• After 6 months of work the project finally failed due to

– At that time I was too young to manage a project– The investor underestimated the complexity of the shopping system

2004 - Microsoft Community Star

• In 2003~2005 I spent a lot of time in CSDN (China's biggest developers network) to discuss technical problems

• I also helped thousands of people to solve their technical problems in the forum

• In 2004 Microsoft elected meas a Community Star

• In 2005 & 2006 Microsoftelected me as a MVP (Most Valuable Professional)

2005 - Microsoft MVP

2006 - Microsoft MVP

2006 - Translated a Book "Enterprise Service with the .NET Framework"

• A book to introduce COM+ (Enterprise Service) in .NET• English version written by

– Christian Nagel

• Chinese version translated by– Wei Xia (major translator)– Xuegen Jin (reviewer)

2008 - FDelta Binary Differ Tool

• Problems to solve– Replicate large amount of data (GBs) between multiple sites across

different countries on limited network bandwidth (KBps)

– The data is usually product builds which update daily

• Approach– Implement an binary diff algorithm to calculate differences (delta)

between different versions of data in binary level

– Base data is needed to copy once. Later only delta is needed to copy over network

– New versions of data can be assembled with base data and delta

– Replication performance is improved 5-10 times in this way

2009 - Marriage

2010 - Code Merge Tool• Problems to solve

– Some code (millions of lines) is wrote upon a base layer (millions of lines of code), however the base layer is significantly changed (30%+ API re-write with different signatures)

– The team needs a compilable code to do manual merge process

• Approach– Write a compiler front-end like analyzer to parse out references to base

layer and inter references inside the new layer– Comment out all code in new layer which has invalid reference to base

layer– Comment out all code which has reference to commented code– Now the code can compile, although cannot run– The reference tree becomes a map to determine merge sequences– Hundreds of human-month efforts is saved

2010 - Kid (Ling)

2010 - DevTest Cloud, a PaaS solution

• Turns Microsoft development server & tools as a cloud platform• Combines VMM 2008 R2, SharePoint 2010, and TFS 2010 together using

DDTK toolkit, Hyper-V API, TFS Object Model, and SharePoint API, into single web interface (ASP.NET MVC)

• Multi-tenant/project/user/VM concepts• Designed for high security projects where developers can perform coding

work while can't take code out of office. E.g. outsourcing projects• Testers can use VMs to do test work (Test Manager & VMM integrated)• PMs can read project reports via web (TFS Report & SQL Reporting Service

integrated)• Billing system

2011 - CloudApp, a SaaS solution

• Delivers desktop software in cloud way• Based on Microsoft RemoteApp technology but overcomes most of its

disadvantages• Clustering support, theoretically the number of cluster nodes is not

limited at all. Load balancing is implemented too• App profiles automatically roam between cluster nodes (not AD user

profile roaming)• User can access files from local hard disk or server storage (cloud storage),

or both - upon administrator's settings, keeping transparent experience (not using \\tsclient namespace)

• User can request software on a web page, and track usage on the web page too

• Upgrading a software is as easy as close and reopen apps, which can be done in several seconds

• IME support

2012 - ?

Hobbies besides Programming

• Reading books– Technologies, history, psychology, etc.

• Playing basketball, billiards, badminton, ping pong, etc.• Swimming• Travelling around the world• Computer games

– Quake 3, Starcraft, Age of Empires 3, etc.

Great People I like

• John Carmack, id Software– Who created the Quake 3 engine and game

• Steve Jobs, Apple– The ultimate genius of art, technology, and business

• Ma Yun, Alibaba– Who created Taobao, the biggest C2C platform in China

THANKS!