I am new to Spring and Couchdb. I have made a login interface in Spring that authenticates the user using Spring-Security.
Can anybody tell how to add user information at the time of log-in in a Couchdb Database ?
Well, there is no defintion of "spring-mvc annotation" based project.
In this case, someone is trying to differentiate between the usage of annotations and xml-configuration based dependency injection and project configuration.
In case you are not familiar with the old way of using spring-mvc, you might take a look on this example.
If you are planning to use spring-mvc in a new project, i would strongly recommend to use spring and spring-mvc with an annotation based style, as described in the spring reference.
Related
So I'm about to learn Spring MVC. But what I don't understand is why should I use Spring MVC if I can implement the MVC pattern using a single servlet conroller and JSPs? What advantages does Spring MVC provide over simple java MVC pattern?
Actually yes, you can do it. Question is if you should do it. Spring MVC gives you better organization of your code.
Pure MVC Frameworks like Spring MVC are obsolete today. When combined with templating engines like Thymeleaf, it lacks functionality and developers usually reinvent JSF. For single-page apps based on some popular JS frameworks that need REST backend, JAX-RS is way cleaner and better than Spring MVC REST.
So no, today you don't need Spring MVC and can stick with pure Java EE. For simple, toy-like applications where servlets are enough, you don't really need it but it may be better to use it. For anything serious, MVC is outdated and Spring has nothing to offer.
Edit 2017: Spring offers JAX-RS integration. However, it has several pitfalls, for example Spring won't automatically register classes annotated with #Path for you. Details can be found in Dzone Article
The best way to realize that it's better to play with these technologies for yourself, if you want to try spring MVC I recommend you start with spring boot because you can create projects with more agility without configuring xml files
Spring Boot
Some Features
Create stand-alone Spring applications
Embed Tomcat, Jetty or Undertow directly (no need to deploy WAR files)
Provide opinionated 'starter' POMs to simplify your Maven configuration
Automatically configure Spring whenever possible
Provide production-ready features such as metrics, health checks and
externalized configuration
Absolutely no code generation and no requirement for XML configuration
One of the ideas applied in Spring (not invented by Spring) is
Do not reinvent a wheel.
Having a single controller is not a good idea I'd say - breaking separation of concerns principle.
You can learn more about MVC from Spring documentation.
I am a newbie in web development. I'm using servlets and JSP for web development.However, I've learnt lately that Spring Framework is apt for that which incorporate servlets, jsp etc. So, my question is that can I now run my program using Spring framework ? Like, I have 2 jsp codes, and 1 servlet class. So, how can I migrate the code in Spring Framework ? what additional things or codes do I need to maintain ?
Migrating an existing J2EE project is easy.
You will get rid of a lot of "boilerplate" code in the process. The easiest way to do it in my opinion will be to use SpringToolSuite.
Import your project in STS and then add "Maven" nature to it. In the pom configuration you can edit all the jars that you need and mention the spring framework. Once all this is setup it will be just a matter of minutes to change the code if it is small.
You can follow these video tutorials about maven and spring to learn about it.
JavaBrains
There are more tutorials by "New Circle training" on youtube for the same.
I would also recommend you to read Spring in action 3rd edition-Manning
This book is a must and the best way to learn spring framework. Hope this helps
I have a really simple question, that I just can't find the answer.
If I want to use only Spring Security, do I need Spring core or any other dependency?
In this link, in the bottom I see only spring security jars as dependencies, but still I couldn't get it to work. I only got it to work when I used a lot more of spring jars (core, context, and more).
So, what are the minimal dependencies I need for using Spring Security? All I need is an authorization and authentication framework, and I want as little dependencies as possible.
Thank you!
For every spring extension you need to use Srping core, because every extension is build on top of spring core
I am trying to develop Annotation based Spring Hibernate standalone application to connect to DB. I've gone through the some blogs and wondered like we should not make use of hibernateTemplate becoz coupling your application tightly to the spring framework. For this reason, Spring recommends that HibernateTemplate no longer be used.Further more my requirement is changed to Spring Hibernate with AOP using Declarative Transaction management.I am new to AOP concepts. Can any one please give an example on Spring Hibernate Connection through AOP. That would be a great help to me.
Thanks in advance.
If you are looking for exemples of project structures, you may want to use maven archetypes which provide you an already working Spring + Hibernate or Spring + JPA configuration.
They may provide you also a web layer (or not) but you can remove it if you want.
To try that, install maven and type:
mvn archetype:generate
By the way, I don't think using HibernateTemplate is a big deal. Many people still use it. But you'd better inject the Hibernate session factory and use contextual sessions with getCurrentSession()
I'd use JPA instead of plain Hibernate. You can of course use Hibernate as a provider. I guess that you know how to run Spring container in standalone application. Just follow the steps from documentation here. Use LocalContainerEntityManagerFactoryBean. Then read about transaction management.
There is a new feature that lets you start JPA without persistence.xml file. Read here.
If you still want to use plain Hibernate follow the docs.
Ive been working now with the Spring Framework 3.0.5 and Spring Security 3.0.5 for several time. I know that Spring Framework uses DI and AOP. I also know that Spring Security uses DI, for example when writing custom handlers or filters. Im not sure whether Spring Security also uses AOP - so my first question is: does it?
Well, Id also like to know how Spring Security can be used for non-spring-based applications. Its written in their documentation that this is possible. Well, I wonder how - it seems like it uses DI, so how should it work in a simple java web application? I guess at least a web container which supports dependency injection is needed, correct? (Which one could that be?)
Thank you for answering :-)
[EDIT]
documentation says:
"documentation says: "Spring Security provides comprehensive security services for J2EE-based enterprise software applications. There is a particular emphasis on supporting projects built using The Spring Framework, which is the leading J2EE solution for enterprise software development. If you're not using Spring for developing enterprise applications, we warmly encourage you to take a closer look at it. Some familiarity with Spring - and in particular dependency injection principles - will help you get up to speed with Spring Security more easily.""
j2ee-based enterprise software applications......... emphasis on supporting projects using spring framework...... well this means it should be possible to work with it without Spring Framework itself!
?
AND:
Even though we use Spring to configure Spring Seurity, your application doesn't have to be Spring-based. Many people use Spring Security with web frameworks such as Struts, for example.
This is from the spring security homepage. well....
Does it use AOP ?
Yes spring-security uses AOP for its method security (you'd have to search the page to find it).
Can you use spring-security without spring ?
Generally no.
As you need to define spring beans for several spring-security elements.
But! You can use Acegi security without spring as far as I know. Which should give you close to the same functionality.
Can you secure a non-J2EE application
Definitely.
Anything that can run in a servlet container can be secured with spring-security. You just need Spring's IoC/DI.
This answer can help you on the minimal spring-security dependencies.