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litl_phil wrote: While it's nice that Google and Acer share the vision of cloud-based computing, it's also worth noting that we at litl already have a webbook on the market (available at litl.com) that runs our own cloud-based OS. Unlike Chrome, litlOS is focused on creating a new and better web experience for the home, so we don't have the usual browser interface, we have our own innovative UI. In conjunction with easel mode (litl's inverted-V position) and our growing cohort of litl channels (special apps t...
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Google App Engine Unveils Its Second Language: Java
Unfortunately at this stage there are several things you can't do using APP engine with Java

Only today I've discovered that Google added support to Java for its App Engine. This is a great news for the Java community. From the Google announcement:

This release includes an early look at our Java runtime, integration with Google Web Toolkit, and a Google Plugin for Eclipse, giving you an end-to-end Java solution for AJAX web applications. Our support for the Java language is still under development and we're eager to get your help and input.


Unfortunately at this stage there are several things you can't do using APP engine with Java. I found this interesting list on byteonic's blog:

1. Cannot write to the filesystem. Must use Data Store for persistence.

2. Cannot open a socket or access another host directly.

3. Cannot spawn a sub-process or thread.

4. Cannot make other kinds of system calls.

5. Cannot create a new java.lang.ThreadGroup nor a new java.lang.Thread. However, operations against the current thread, such as Thread.currentThread().dumpStack() is allowed.

6. The features of the java.lang.System class that do not apply to App Engine are disabled.

7. The System methods such as: exit(), gc(), runFinalization() and runFinalizersOnExit() do nothing.

8. Cannot directly invoke JNI code

9. Application is allowed full, unrestricted, reflective access to its own and JRE classes. However, An application cannot reflect against any other classes not belonging to itself, and it can not use the setAccessible() method to circumvent these restrictions

Moreover Google has published a page where all the Java classes unsupported has been listed: Will It Play in App Engine ?.

Read the original blog entry...

About Marco Casario
Marco Casario is CEO of Comtaste, a company devoted to develop Rich Internet Applications on the Web and for mobile devices.

He collaborates intensively with Adobe Italy as a speaker at conferences and as a consultant for Flash, Flex, and Flash Lite.

Learn more about Marco Casario at his blog http://casario.blogs.com. In 2005, Marco has founded Comtaste, a company dedicated to exploring new frontiers in Rich Internet Applications and the convergence between the web and the world of mobile devices — MobyMobile and YouThru are representative of their recent work. He is founder of the biggest worldwide Flash Lite User Group and of www.augitaly.com, a reference point for the Italian community of Adobe users, in which he carries out the role of Channel Manager for the section dedicated to Flex.

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