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// These methods are all very similar, unfortunately there's no way to use Java templates to solve// The redundancy because annotations can not have inheritance, and the ".value()" function is specific// to each class

Stripe Lock in Java:

https://google.github.io/guava/releases/19.0/api/docs/com/google/common/util/concurrent/Striped.html

http://codingjunkie.net/striped-concurrency/

The Simple Logging Facade for Java (SLF4J) serves as a simple facade or abstraction for various logging frameworks (e.g. java.util.logging, logback, log4j) allowing the end user to plug in the desired logging framework at deploymenttime.

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Some good links

https://www.html5rocks.com/en/tutorials/internals/howbrowserswork/ http://taligarsiel.com/ClientSidePerformance.html -- Client side performance tips https://ariya.io/ https://vertx.io/docs/ -- New exciting Framework, Must read. https://javaee.github.io/ -- Very good resource to see various javaee projects and explore enterprise architecture and design concepts. https://projects.eclipse.org/projects/ee4j -- Lots of interesting open source projects by eclipse http://openjdk.java.net/projects/mlvm/ -- the main project for supporting more dynamic languages to jvm. http://esprima.org/ -- EcmaScript parser http://c2.com/ppr/ and http://hillside.net/ -- Good place to learn patterns http://cr.openjdk.java.net/~briangoetz/lambda/Defender%20Methods%20v4.pdf https://validator.w3.org/nu/ -- This will validate your website css and js https://www.cellstream.com/intranet/reference-reading/faq/216-what-is-2-128.html http://shattered.io/ -- An example of SHA1 collision attack.

@MappedSuperclass vs. @Inheritance

MappedSuperClass must be used to inherit properties, associations, and methods. Entity inheritance must be used when you have an entity, and several sub-entities. You can tell if you need one or the other by answering this questions: is there some other entity in the model which could have an association with the base class? If yes, then the base class is in fact an entity, and you should use entity inheritance. If no, then the base class is in fact a class that contains attributes and methods that are common to several unrelated entities, and you should use a mapped superclass. For example: You can have several kinds of messages: SMS messages, email messages, or phone messages. And a person has a list of messages. You can also have a reminder linked to a message, regardless of the kind of message. In this case, Message is clearly an entity, and entity inheritance must be used. All your domain objects could have a creation date, modification date and ID, and you could thus

Hashmap Keyset and EntrySet difference.

If you're concerned about performance when iterating through your hash map, I suggest you have a look at LinkedHashMap . From the docs: Iteration over the collection-views of a LinkedHashMap requires time proportional to the size of the map, regardless of its capacity. Iteration over a HashMap is likely to be more expensive, requiring time proportional to its capacity. HashMap.entrySet() The source-code for this implementation is available. The implementation basically just returns a new HashMap.EntrySet . A class which looks like this: private final class EntrySet extends AbstractSet < Map . Entry < K , V >> { public Iterator < Map . Entry < K , V >> iterator () { return newEntryIterator (); // returns a HashIterator... } // ... } and a HashIterator looks like private abstract class HashIterator < E > implements Iterator < E > { Entry < K , V > next ; // next entry to ret

Things that i do at work.

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