S/W Design and Arquitecture

After having read Ready Player One by Ernest Cline, I want to talk about the next two quotes: Morrow wrote in his autobiography that he’d left GSS because ... he felt that the OASIS had evolved into something horrible. “It had become a self-imposed prison for humanity,” he wrote. “A pleasant place for the world to hide from its problems while human civilization slowly collapses, primarily due to neglect.” (p. 120) and (Halliday speaking) “I created the OASIS because I never felt at home in the real world. I didn’t know how to connect with people there. I was afraid, for all of my life. Right up until I knew it was ending. That was when I realized, as terrifying and painful as reality can be, it’s also the only place where you can find true happiness. Because reality is real.” (p. 364) These quotes are so captivating and I agree with both of them. If we think about nowadays (October 30, 2017), our OASIS is each one of the places where people try to escape from reality, ...

Using microservices is one of my favorite things on projects, they make it easier to reuse already done software written on any programming language. The only drawback is the complexity of organizing those microservices. Another problem is to define how small your microservice should be. This microservice can scale horizontally by running many instances behind a load-balancer. As Martin Fowler and James Lewis said, a microservice has the next characteristics: Componentization via Services Organized around Business Capabilities Products not Projects Smart endpoints and dumb pipes Decentralized Governance Decentralized Data Management Infrastructure Automation Design for failure Evolutionary Design For me, the best implementation of microservices are APIs and packages that can be called in order to create or transform a piece of information with certain operations/instructions. Now a days we don't create a server entirely, we use a package to create an endpoint that ca...

UML everywhere, or that is what every professor at my university has taught me. In addition there are other ways of viewing the software architecture. 4 + 1 View is one of this ways, 4 + 1? Yes! isn't that 5? Well this is because the called "5th View" are the scenarios. View Name Logical View Development View Process View Physical View Scenarios Description What components are going to be made and how they will behave What belongs to what during the development Concurrency and synchronized stuff SW (Software) and HW (Hardware) relations AND the how the system looks when finished Interactions between the components Diag...

The SOLID principles are great to reduce the possibility of things going wrong, but how can they do it? Well as the reading says, by minimizing class dependencies. These principles are: S ingle Responsibility Principle  O pen/Closed Principle  L iskov Substitution Principle  I nterface Segregation Principle  D ependency Inversion Principle A great example of the Single Responsibility Principle is the usage of microservices. This services have a main purpose and most of the time they only work for that. For example an OCR (Optical Character Recognition) microservice should only accept an input, try to recognize the text inside the image and return a result, nothing less, nothing more. Any variation should be coded outside the microservice to have a different result. An image that can help you understand it is the next one: For the Open/Closed Principle I think that a good example is the ToString in which you only change the "behavior" of the class...