What does REST stand for?
REST stands for REpresentational State Transfer.
What is a resource?
Anything that can be named is a resource. Usually that nouns that define our model.
What are safe REST operations?
Safe operations are operations that don't change things. These...
What is the delegating filter proxy?
Delegating filter proxy is a servlet filter registered with the web container that delegates the requests to a Filter implementation on the Spring context side. That is there a 2 places servlet filters are attached...
Hibernate is an ORM framework that implements Java Persistence API (JPA).For Hibernate to work we need 3 things:Hibernate configuration (hibernate.properties or hibernate.cfg.xml)
Mapping metadata (XML or annotation-based) - info for instructing Hibernate on how the entities have to...
What is the difference between checked and unchecked exceptions?
Checked exceptions are exceptions that are checked at compile time - that fact enforces the developer to either catch it and handle or declare as being thrown and it will be...
MVC is an abbreviation for a design pattern. What does it stand for and what is the idea behind it?
MVC stands for Model-View-Controller. The idea is to separate these three concepts rather than mixing them - as it is very...
What is the concept of AOP? Which problem does it solve?Aspect Oriented Programming (alias AOP) is a concept of separating cross-cutting parts of an application. For example suppose you want to add logging or some security functions to different...
I've been reading Logback documentation today and found an interesting moment about its speed of logging.Assuming we have set a logging level higher than DEBUG (INFO, WARN or ERROR) and then we try to log something like:
Object someObject =...
There is something interesting about Camel Routes.Usually they are defined in the beginning and assumed to have the same endpoints. But today I had a situation when depending on the .process() execution the result endpoint had to be dynamic.So...
Some background...In this series of posts I will give the answers I found for each of the Core Spring 4.2 Study Guide questions (you can download the guide at http://vojtechruzicka.com/wp-content/uploads/2016/10/Core-Spring-4.2-Certification-Study-Guide.pdf)Suppose you have 2 teams working on two different layers of...
Servlets are programs that run on Web server (or Application server, which is usually called servelt container) and act as a middle layer between the web browser and database (or other application).Incoming (request)
Servlet
Outgoing (response)Data from HTML forms, applets and custom...