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Java EE web development, where do I start and what skills do I need? [closed]

I want to learn, at least at a basic level, how to build Java web applications (coming from a .NET background). I would like to be able to build, deploy a simple CMS type application from the ground up. ...
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START_STICKY and START_NOT_STICKY

...ices that use this mode should always check for this case and deal with it appropriately. START_NOT_STICKY says that, after returning from onStartCreated(), if the process is killed with no remaining start commands to deliver, then the service will be stopped instead of restarted. This makes a lot m...
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Data Modeling with Kafka? Topics and Partitions

...y. this scene is very good as a example. The user's events on your web or app can be logged by your Web sever and then sent to Kafka broker through the producer. In producer, you could specific the partition method, for example : event type (different event is saved in different partition) or event...
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What's the difference between the atomic and nonatomic attributes?

... astronomicalEvents; that lists data I want to display in the UI. When the application launches the pointer points to an empty array, then the app pulls data from the web. When the web request completes (in a different thread) the app builds a new array then atomically sets the property to a new poi...
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Valid to use (anchor tag) without href attribute?

...ter Bootstrap to build a site, and a lot of its functionality depends on wrapping things in <a> , even if they're just going to execute Javascript. I've had problems with the href="#" tactic that Bootstrap's documentation recommends, so I was trying to find a different solution. ...
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What are best practices that you use when writing Objective-C and Cocoa? [closed]

...(including the cell itself) opaque for performance. That means setting the appropriate background color in everything. 3.6) When using an NSURLConnection, as a rule you may well want to implement the delegate method: - (NSCachedURLResponse *)connection:(NSURLConnection *)connection ...
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Manually raising (throwing) an exception in Python

...cific in your message, e.g.: raise ValueError('A very specific bad thing happened.') Don't raise generic exceptions Avoid raising a generic Exception. To catch it, you'll have to catch all other more specific exceptions that subclass it. Problem 1: Hiding bugs raise Exception('I know Python!')...
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what is the difference between a portlet and a servlet?

...ortlets The packaging and deployment are essentially the same, WAR/EARs. Application Session exists in both Servlet and Portlet containers. It is one of the ways of of sharing data (crude Inter-Portlet Communication) from the render phase to the action phase (or any lower phases) in the portlet co...
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What is the recommended approach towards multi-tenant databases in MongoDB?

I'm thinking of creating a multi-tenant app using MongoDB. I don't have any guesses in terms of how many tenants I'd have yet, but I would like to be able to scale into the thousands. ...
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What is a Portable Class Library?

...in the shade. UPDATE May 20 2013: Very practical coverage of practical application and implications of this for cross-device stuff (think Xamarin Studio) in Tablet Show podcast with Atley Hunter. Key takeaway:- PCLs are a very useful constraint to impose on onself in cross-device scenarios. One ...