barcode maker vb.net Making a Move in Objective-C

Generator QR Code in Objective-C Making a Move

Making a Move
Encode QR In Objective-C
Using Barcode drawer for iPhone Control to generate, create QR Code JIS X 0510 image in iPhone applications.
www.OnBarcode.com
Barcode Drawer In Objective-C
Using Barcode generation for iPhone Control to generate, create Barcode image in iPhone applications.
www.OnBarcode.com
When you make your move, Deep Green sends it, along with game and state information, to the web service on the server. The server records the move under the game. It was an important design goal of mine that the server should not have to know anything about chess except that the players move in turn. But I didn t want to have to code and maintain the chess rules in several places.
Generating Barcode In Objective-C
Using Barcode maker for iPhone Control to generate, create Barcode image in iPhone applications.
www.OnBarcode.com
QR Code Printer In Objective-C
Using Barcode generation for iPhone Control to generate, create QR Code 2d barcode image in iPhone applications.
www.OnBarcode.com
Getting Notified
Drawing GTIN - 12 In Objective-C
Using Barcode encoder for iPhone Control to generate, create GTIN - 12 image in iPhone applications.
www.OnBarcode.com
Creating Code 128A In Objective-C
Using Barcode generation for iPhone Control to generate, create Code 128C image in iPhone applications.
www.OnBarcode.com
When you make your move, the opponent should know about it. And that s exactly what Deep Green does. Since iPhone OS doesn t allow third-party processes to run in the background, developers are left to using the Apple Push Notification Service (APNS) in
EAN 128 Generation In Objective-C
Using Barcode creator for iPhone Control to generate, create EAN 128 image in iPhone applications.
www.OnBarcode.com
GS1 - 12 Creation In Objective-C
Using Barcode generator for iPhone Control to generate, create GTIN - 12 image in iPhone applications.
www.OnBarcode.com
CHAPTER 2: Chess on the Net: Correspondence Gaming with Deep Green
QR Code Drawer In Visual Basic .NET
Using Barcode generator for .NET framework Control to generate, create QR-Code image in .NET framework applications.
www.OnBarcode.com
Quick Response Code Recognizer In Java
Using Barcode recognizer for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
situations like this, where you want to tell the user about an event, even when your app isn t running on the user s device. I m not going to cover APNS in this chapter, but I ll briefly explain what it is because it s a very useful feature to implement. Each iPhone OS device maintains a persistent connection with Apple s Push Notification server (cloud). When APNS receives a notification request from a developer s application server, it pushes it to the given device that can then display a message, play a sound, update the app icon badge, or do any combination of these depending on the user s preferences. The tricky part, from your perspective as a developer, is the communication between your server and APNS. Not only does it require a persistent, raw socket connection, but it also requires properly issued and applied certificates (and if you ve been developing iPhone apps for a while, you know what a circus that can all be). This can all be done, of course, and I wouldn t be surprised if third-party services were available by the time you read this. If you want to roll your own solution, however, I suggest you read iPhone SDK 3 Projects from Apress. There s a whole chapter devoted to this topic.
Code 128A Recognizer In VB.NET
Using Barcode decoder for Visual Studio .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
Universal Product Code Version A Maker In Java
Using Barcode creator for Android Control to generate, create Universal Product Code version A image in Android applications.
www.OnBarcode.com
The Tools of the Trade
Draw Barcode In None
Using Barcode drawer for Online Control to generate, create Barcode image in Online applications.
www.OnBarcode.com
Encoding Barcode In None
Using Barcode drawer for Office Excel Control to generate, create Barcode image in Office Excel applications.
www.OnBarcode.com
Now, how do you tie these things together How do you establish our web service, and where Which database should you be using How do you communicate with the server Before I knew the answers to these questions, the only thing I knew was that I didn t want to host the solution myself. I ve been doing a lot of LAMP (Linux, Apache, MySQL, PHP) over the years, but I treasure my sleep (with two little kids, even more so) and didn t want to have to worry if my server was up and running. And what about load balancing What if users started playing a lot, which I sure hoped they would Would the solution scale I had no idea until a friend of mine pointed me to Google App Engine. It was a nobrainer: build your web services using the feature-rich and elegant Python scripting language, have your objects stored in a high-performance object datastore, deploy once, and become hosted on Google s own infrastructure with thousands of servers worldwide, maintained and monitored for you. Sounds expensive, right Actually, it s free. What s not to love The service is free up to certain quotas, which, at least for a chess game, seem very generous. Check with the current Google App Engine Terms of Service at http://code.google.com/appengine/terms.html. Over a certain limit of traffic, you ll start being charged. I guess you could say it bears the price of success: more users, more money.
Barcode Maker In Java
Using Barcode creator for Java Control to generate, create Barcode image in Java applications.
www.OnBarcode.com
EAN-13 Supplement 5 Generator In VS .NET
Using Barcode creation for VS .NET Control to generate, create EAN13 image in VS .NET applications.
www.OnBarcode.com
CHAPTER 2: Chess on the Net: Correspondence Gaming with Deep Green
UPC-A Supplement 2 Decoder In None
Using Barcode scanner for Software Control to read, scan read, scan image in Software applications.
www.OnBarcode.com
Make Code-39 In Objective-C
Using Barcode encoder for iPad Control to generate, create Code 39 Extended image in iPad applications.
www.OnBarcode.com
Google App Engine (GAE) lets you install and deploy websites and web applications and will take care of load balancing and replicating your datastores. You can even serve your applications securely using https://. Google also offers a Java SDK, if that s a better fit for you. I hadn t seriously used either Python or Java when I started coding the web service, but I felt Python was a better choice because of its increased popularity and momentum over the last years, while Java seemed to have had its days of glory. Even if you don t know Python, you ll quickly realize from my examples that it s very easy to pick up, especially if you ve already used another scripting language such as PHP. It s not totally unlike Objective-C either. The official website, http://python.org, offers a wealth of information but may not necessarily be the easiest place to start. I ended up buying Dr. Drew McCormack s e-book for the iPhone, Scientific Scripting with Python, available from the Mental Faculty at http://www.mentalfaculty.com/ python_scripting. I m not a scientist, not even a mad one, but with the e-book, I was up to speed after a few hours of reading.
Generating UCC - 12 In .NET
Using Barcode printer for Reporting Service Control to generate, create USS-128 image in Reporting Service applications.
www.OnBarcode.com
Painting EAN 128 In Java
Using Barcode drawer for Java Control to generate, create UCC.EAN - 128 image in Java applications.
www.OnBarcode.com
Stop Talking, Start Coding!
OK, let s get our hands dirty. We ll start by implementing the web service on GAE and then the client code on the iPhone for interacting with the web service. I ll do some basic stuff to begin with, so if you want to follow along, take a moment and sign up with GAE at http://appengine.google.com if you haven t done so already. As I said, it s free. You need to download and install the SDK. I hadn t used GAE before, so I ll quickly take you through the same easy steps I went through mostly to illustrate how simple it is.
Copyright © OnBarcode.com . All rights reserved.