I want to make a small CRUD application using Spring Core and also I want to use Spring Data JPA.
How can I make such application without any web dependency or others like without using Spring MVC and Spring Boot.
Simple Spring Core + Spring Data JPA crud application.
Forget about whether it is recommended or not but is it possible?
Spring Boot is a architecture and it is not a framework. If you want to use Spring Core + Spring Data Jpa without spring-boot then go with maven quickstart.
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I'm working on project, that uses Spring framework (Spring MVC, JDBC etc.) Project is not so big and uses Jetty servlet container, PostgreSQL database with standard DAO classes(sql requests). I need to make it possible to use Spring Boot and Hibernate/Spring JPA with repositories instead SQL queries. I found a few states describes migration to spring boot: https://www.baeldung.com/spring-boot-migration https://3ldn.nl/2016/02/16/spring-boot-in-an-existing-application-part-1/ Now I make small example with Hibernate - generate few Entities and make CRUD operations with Hibernate instead sql queries.
But I need to update existing project for using Spring Boot and I need to use Spring JPA Repositories.
I add spring boot dependencies in dependencyManagment section. What steps I need to do`s next?
I've solved my task and succesfully migrate project to spring boot with JPA/Hibernate.
Its very simple task! and all what you need to migrate is:
0) solve all dependencies issues and remove all tags from boot dependencies.
1) How to use JPA Repositories without Spring Boot
2) How to migrate existing Spring project to Spring Boot
that is all.
My problem is when we use Spring boot like framework, we can easily handle AOP. but how we handle AOP with jersy jaxrs project
Spring Boot is just a bootstrapping framework. For REST we can use Spring Boot to bootstrap Spring MVC or Jersey fully integrated with Spring. If you choose the latter route, then you can use the Spring AOP with Jersey. All you need to do is make your Jersey resources Spring #Components to able to intercept them. See an official example of Spring Boot and Jersey.
If you don't want to use Spring Boot to bootstrap your Jersey app, then you can still integrate Spring with Jersey. Remember the AOP is not tied to Spring Boot, it is tied to the Spring Framework, which are different things. You can see an example of Jersey with Spring (without Spring Boot) here.
If you don't want to involve Spring at all, then Jersey has a DI framework, HK2, which has it's own AOP. You can see a full example here
ive been tasked with a total refactor of legacy code. It's a simple webservice, just an http request, then business logic with possibly a few database calls and a few other microservice calls, then a json response. I am being pushed not to use spring boot because no one else around me has used it before, and I was told jersey does everything spring boot does. I've never used jersey so im trying to find out how to do things that spring boot makes simple (ie repository layer with spring-data, caching, spring-consul, spring-zuul, spring-actuator, spring-circuit-breaker) It looks like jersey does do an analog of spring-security, bean validation, and easy insertion of servlet filters, but not everything spring-boot does. Is there an easy way to wire in a JPA type repository in jersey? I cant find it in the docs at https://jersey.java.net/documentation/latest/index.html.
I think about it this way. There are different layers in your application. You have a service layer, and you have a "REST layer". You access the Spring repositories with the service layer. Then you have the REST layer. With Spring, you have Spring MVC which is its web layer implementation, that you can also use as REST services. There is also Jersey, which is completely independent of Spring, which is a another REST layer options.
That be said, when using Spring MVC as the REST layer, adding the service layer with Spring data is seamless. But Jersey also has integration with Spring, that allows us to use Spring at the service layer inside our Jersey REST services. You check out this post which has some links to example of how this can be done (no hacking, this is supported out of the box). Using this approach, you can just injector your Spring data repositories into your Jersey resource class
interface PetsRepository extends JpaRepository<Pets, Long> {}
#Path("/pets")
class PetsResource {
#Autowired
private PetsRepository repo;
}
Now lets talk about Spring Boot. Spring Boot is just a bootstrapping framework. What it does is allow you to easily bootstrap an application without all the boilerplate configuration you would need without it. When your using Spring Boot for your REST services, you're not actually using Spring Boot itself as the REST service engine. You are only using it to bootstrap Spring MVC and maybe your Spring Data. But Spring MVC is the actual REST service engine.
Now like I said before, Jersey has support for integrating Spring into into it (for the service layer). Because of this support, Spring Boot has also provided a bootstrap configuration to integrate this support seamlessly. So instead of using the manual configuration that you would see in one of the examples linked to above, Spring Boot handles this configuration for us. So we can use Jersey as the REST layer, and Spring beans as the service layer. Check out the links below
See also:
Spring Boot docs for Jersey support
I am using spring boot in my application, i want to know how to use Spring boot, iBatis and MySQL. While i am trying to find the reference for Spring boot with iBatis projects its automatically redirect to myBatis. I need a example project or site for referring this. I have example for mybatis but i want ibatis with spring boot.
I think, you shouldn't think how you may connect them. Just read docs about iBatis(MyBatis). But the following link special for you http://www.mybatis.org/spring-boot-starter/mybatis-spring-boot-autoconfigure/
I am building a project with Dropwizard, Couchbase and ElasticSearch.
I am looking for a persistence layer like an ODM for Dropwizard and CouchBase. I looked over and found Spring-data-couchbase. Can I integrate DropWizard with Spring-data-couchbase and just use Spring-data-couchbase just for persistence? If I just use Spring-data-couchbase will it create an IOC container?
if you are looking for an ODM layer, we recently added a light one to the Java SDK, see Entity Mapping: http://blog.couchbase.com/javasdk-2.2-dp
Also if you are looking to use Spring Data Couchbase, you should maybe look into Spring boot, that basically does the same things as DropWizard. But of course Spring Data Couchbase is more integrated with Spring Boot than DropWizard.
As for DropWizard and Spring, yes I guess you would drag some Spring dependency in there so it might create some stuff that already have an equivalent in Dropwizard. But I have no knowledge of Dropwizard so, not sure.