Beginning Java Google App Engine by Kyle Roche, Jeff Douglas

By Kyle Roche, Jeff Douglas

I used to be very pissed off with my buy and that i was once considering to jot down a assessment out of frustration. even if, after i have obvious the 5-star reports from different clients, i could not think my eyes. One overview was once raving concerning the code samples (absolutely ridiculous) after which I observed another reader leaving a remark for the evaluate announcing that he is been engaged on the pattern code for weeks and nonetheless could not make it paintings and that i can relate to that.

I pre-order this booklet from Amazon and whilst I begin analyzing it, it was once a complete sadness. i have been engaged on GAE/J for some time now and that i received this publication in particular to benefit extra approximately Google bills. the instance tasks will not be entire and it calls for you to fill within the blanks to cause them to paintings. i have additionally checked out the opposite chapters they usually lack in content material. The e-book attempts to provide you total, breadth-first view of the know-how (as you will count on from a newbie point book), yet whereas doing so it mentions approximately bunch of GAE subject matters, yet fails on giving strong insurance for that subject. in particular in bankruptcy four, whilst the author(s) discuss frameworks, they do not point out approximately gotchas on the right way to make those frameworks paintings on the first position, simply because in case you are utilizing Spring, BlazeDS and GraniteDS (or the other frameworks, you must do definite tweaks to make those frameworks/technologies/APIs paintings with GAE, simply because many of the Java APIs are "black-listed" by way of the App Engine for the most obvious reasons.

If you are a newbie, this isn't a booklet for you. in case you are complicated, nonetheless this publication does not offer you adequate in-depth info of the GAE/J issues. In end, it truly is unhappy to claim, yet this publication is lifeless! it can save you funds simply by going to Google's App Engine web site and locate extra updated and entire details, simply because they retain changing/upgrading the SDKs for GWT and the App Engine virtually each month.

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Beginning Java Google App Engine

I used to be very pissed off with my buy and that i was once considering to put in writing a evaluation out of frustration. although, after i have visible the 5-star stories from different clients, i could not think my eyes. One overview used to be raving in regards to the code samples (absolutely ridiculous) after which I observed another reader leaving a remark for the evaluate asserting that he is been engaged on the pattern code for weeks and nonetheless could not make it paintings and that i can relate to that.

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You can see how quickly and easily you can leverage the power of Google Web Toolkit to build a pretty impressive application. Local Development Server The App Engine SDK comes with a local development server for App Engine testing and debugging. This is required because the Java Runtime on App Engine is slightly different from the standard distribution. For example, you can’t open ports or sockets in App Engine. To make a remote HTTP request you need to implement App Engine’s URL Fetch service (covered in Chapter 8).

There are a few key methods to browse to get an idea of what’s going on with the sample application. Look for the onModuleLoad() method. It should look similar to the code in Listing 3-2. Listing 3-2. setFocus(true); } }); Without ever even using GWT you can quickly browse the code and follow exactly what is happening. The method loads the Google Web Toolkit elements in an order and fashion that lays out your page perfectly. Take the following lines, for example. html file from the web application archive (war directory) you can see the following HTML elements.

App Engine supports Java servlets, JDO, JPA, JCache, and JavaMail. In traditional software environments you’d have to replicate your production environment by building a development environment to properly test your applications. App Engine provides a lightweight, local development server that allows for quick testing and debugging of all features. This even includes a development authentication engine. Where Do We Start? Like any other platform or development environment, the first step is to download and configure the SDK and the development environment.

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