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Is asynchronous jdbc call possible?
...t understand how any of the proposed approaches that wrap JDBC calls in Actors, executors or anything else can help here - can someone clarify.
Surely the basic problem is that the JDBC operations block on socket IO. When it does this it blocks the Thread its running on - end of story. Whatever wra...
Why does calling a method in my derived class call the base class method?
.../override.
You can imagine, that a class, when instantiated, is nothing more than a table of pointers, pointing to the actual implementation of its methods. The following image should visualize this pretty well:
Now there are different ways, a method can be defined. Each behaves different when ...
Design Patterns: Abstract Factory vs Factory Method
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Hope this helps. It describes the various types of factories. I used Head First Design Patterns as my reference. I used yuml.me to diagram.
Static Factory
Is a class with a Static Method to product various sub types of Product.
Simple Factory
Is a class that can produce var...
How do I create a self-signed certificate for code signing on Windows?
How do I create a self-signed certificate for code signing using tools from the Windows SDK?
5 Answers
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Difference between __getattr__ vs __getattribute__
I am trying to understand when to use __getattr__ or __getattribute__ . The documentation mentions __getattribute__ applies to new-style classes. What are new-style classes?
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How do I list one filename per output line in Linux?
I'm using ls -a command to get the file names in a directory, but the output is in a single line.
7 Answers
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Validation failed for one or more entities. See 'EntityValidationErrors' property for more details [
I am having this error when seeding my database with code first approach.
29 Answers
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Recursive Lock (Mutex) vs Non-Recursive Lock (Mutex)
...twice, otherwise no other thread can obtain the mutex. Not all systems supporting pthreads also support recursive mutexes, but if they want to be POSIX conform, they have to .
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NSDate get year/month/day
How can I get the year/month/day of a NSDate object, given no other information? I realize that I could probably do this with something similar to this:
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Remove ActiveRecord in Rails 3
...is out, I thought I'd have a look at rewriting an app I have just started work on in Rails 3 beta, both to get a feel for it and get a bit of a head-start. The app uses MongoDB and MongoMapper for all of its models and therefore has no need for ActiveRecord. In the previous version, I am unloading a...