Design Principles

Identify the aspects of your application that varies and separate them from what stays the same.

Program to an Interface, not to an Implementation.

Strategy Pattern:
Strategy pattern defines a family of algorithms, encapsulates each one, and makes them interchangeable. Strategy lets the algorithm vary independently from the clients that uses it.

Each pattern describes a problem that occurs over and over again in our environments.and then describes the core of the solution to that problem, in such a way that you can use this solution a million times over without ever doing it the same way twice.

Strategy using CDI and Producers:

https://www.nicolaferraro.me/2016/02/24/strategy-pattern-using-cdi/

Comments

Patterns Knowledge

Anti Pattern: Its a pattern which we repeatedly do and which brings negative results. Architecture by implication: Systems lacking a clear and document architecture. Cover Your Assets: Continuing to document and present alternatives, without ever making an architectural decision. Witches Brew: Architectures made by groups resulting in a mix of ideas and lack a clear vision. Gold Plating: Continuing to define an architecture well pass the time which results in no benefits to the architecture. Vendor King: A product dependent architectures leading to a loss of control of architecture and development costs Big Bang Architecture: Designing the entire architecture at the beginning of the project when you know the least about the system.

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.

Cryptography

Crypto - Secret Graphy - To Write CryptoLogy - The science of secrets Symmetric Cryptography: Both the parties have the same keys. Asymmetric Cryptography: Both the parties do not have the same keys. They work on the concept of Public and Private Keys. Its also called as Public Key Cryptography. Its very expensive to encrypt and decrypt using Asymmetric Cryptography. Hence there are systems which use both Symmetric and Asymmetric Cryptography together like ECC. Don't implement your own Crypto. Its very easy to do it incorrectly. Side Channel: When you can observer properties of a function other than their functional behaviour it is called as Side Channel. E.g. Knowing how long it takes to encrypt a text, knowing the length of a particular encrypted text. In cryptography, Kerckhoffs's principle (also called Kerckhoffs's desideratum, assumption, axiom, doctrine or law) was stated by Netherlands born cryptographer Auguste Kerckhoffs in the 19th century: A c

Things that i do at work.

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