Questions tagged [hibernate]
An object-relational mapping (ORM) framework for the Java programming language.
85
questions
82
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6
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Service layer vs DAO -- Why both?
I have been working with SpringMVC, Hibernate, and some databases in a java web application example.
There are a few different ones that do this, but this Spring 3 and hibernate integration tutorial ...
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votes
5
answers
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What are the advantages of myBatis over Hibernate? [closed]
I've done some research on my own and understand the basic concept. But some insights can only be gained through actual experience.
What are the advantages of myBatis that would make it worth ...
- 817
19
votes
1
answer
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Java application structure: Horizontal vs vertical split
Having a bit of a debate about the starting project structure (using Maven/Eclipse) for a big Java application.
Option 1:
entities (i.e. the whole database using Hibernate classes-first)
services (i....
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19
votes
5
answers
64k
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Do I need to know servlets and JSP to learn spring or hibernate or any other java web frameworks? [closed]
I've been asking a lot of people where to start learning java web development, I already know core java (Threading,Generics,Collections, a little experience with (JDBC)) but I do not know JSPs and ...
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votes
2
answers
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Is Spring + Hibernate prefered instead of EJB 3?
It is my perception that whenever new JEE projects start (where these technologies would be applicable), people prefer to use a combination of Spring + Hibernate instead of EJB 3.
It seems junior ...
- 2,309
9
votes
5
answers
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How to design a complex REST API considering DB performance?
I've been following some tutorials on how to design REST APIs, but I still have some big questions marks. All these tutorials show resources with relatively simple hierarchies, and I would like to ...
- 1,607
9
votes
1
answer
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IntelliJ with Maven compilation
I have a project that needs Hibernate jars.
I added them as dependencies in the pom.xml and Maven compiles my project well.
However, in the IDE, all annotations and calls to Hibernate API are marked ...
- 3,858
8
votes
1
answer
2k
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ORM: runtime proxies vs bytecode instrumentation
What are the benefits of using runtime proxies with an ORM provider like Hibernate or EclipseLink compared to bytecode instrumentation/enhancement?
I know that bytecode instrumentation helps to ...
- 257
7
votes
4
answers
2k
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Examples of mid/large-scale web-apps built without an ORM?
I've been reading a lot of hate spewed on ORMs, and am genuinely interested in finding out if there is a better way of doing things.
Unfortunately, while there are tons of books, blog posts, and ...
- 557
7
votes
3
answers
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How significant are Spring and Hibernate in software development? [closed]
I am a software professional with about 1.6 years of experience in Java. Due to personal reasons, I had to quit my job, and now after 5 to 6 months, I am about start my career again. I am planning to ...
- 87
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votes
1
answer
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Why were annotations introduced in Spring and Hibernate?
I would like to know why were annotations introduced in Spring and Hibernate? For earlier versions of both the frameworks book authors were saying that if we keep configuration in xml files then it ...
7
votes
3
answers
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Best way to deal with Hibernate 1->Many relationship over REST/JSON service
Problem: A Hibernate bi-directional One-to-Many relationship does not map easily to JSON. If default (Jackson) mapping is used there is an infinite recursion issue as the parent contains the children ...
- 179
7
votes
4
answers
8k
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Programmatically extending Hibernate table/entity definitions in Spring, how?
I would like to know if there is a way —maybe with AOP— to extend table/entity definitions so that I can add functionality across the board that requires persistence.
Let me explain what I want to do ...
- 13.9k
6
votes
4
answers
2k
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Performance related doubt in Java with Hibernate
Suppose in some ORM based project (say Hibernate) I am trying to fetch only few columns rather then the whole Object with may be more than 20 attributes. I am writing HQL like "select attr1, attr2 ...
- 174
6
votes
3
answers
2k
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When Business Object fields should not exactly reflect database columns
Main advantage with Hibernate annotations is the fact that a simple POJO (also called a Business Object the most of time) can become persistent through Hibernate annotations (or actually JPA) .
In ...
- 3,858
6
votes
2
answers
1k
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Hibernate set up for beginner
I am learning Hibernate (OR Mapping). I am using Maven for project management. However, I am currently reading a Hibernate book by O'Reilly, and they use ANT for their example. So my question is are ...
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1
answer
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Is this database design good? What JPA Entities should I create for this design?
I am trying my hands on JPA. For this I am thinking of using the example of a student admission process as shown in the diagram below.
Is this design good ?
Any suggestions for improvement are more ...
- 207
5
votes
3
answers
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What reading is recommended for an experienced Java/SQL Developer moving to Apache/Tomcat, Postgres, Hibernate [closed]
I am taking over management and development of a website developed in Java using Hibernate and Postgres, running on Apache/Tomcat. I am an experienced Java developer, and have experience in Ruby on ...
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4
votes
2
answers
3k
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Micro-service database management?
Most people say when building micro-services, that it's best to have separate databases for each of the microservices.
E.g:
User-microservice:
DB - User
userId
name
Etc...
Review-microservice:
...
- 173
4
votes
3
answers
6k
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Best practices for retrieving data scattered over multiple tables
In the company I work with, we have a 3-layer architecture in our micro-services and the flow is like this:
Repository/DAO (entity) => Service (entity) => Controller (dto)
At the Controller ...
- 57
4
votes
2
answers
2k
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What's the correct approach to DAO layer in presence of ORM framework
I'm using JPA/Hibernate but probably it doesn't limit question.
Currently I'm writing my data access code in my web controller classes. Thanks to JPA, in most cases this code is very simple, ...
- 141
4
votes
3
answers
2k
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Allowing users to add their own custom fields in a Spring MVC Hibernate application - What's an ideal approach?
We all may have seen applications like JIRA, or many CRM or other applications that allow its users to define their own custom fields to an entity, and do a variety of stuff with it, like making them ...
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3
votes
1
answer
133
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Handling ground-breaking changes in a production system - Insert intermediate level Management object
As our client request, we are proceeding to change the base of our system. We already have the following structure:
A class has many students. (simple typical one - to - many)
Now we must change ...
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3
votes
1
answer
84
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Dealing with Users and User-Owned Data in an API
I have a question about the way I am architecting an API.
Structure
My API structure so far is like so (there is about 10 classes total, but many are similar, so I've reduced to these classes, and ...
3
votes
1
answer
4k
views
What is the best way to manage Hibernate sessions in a Struts-1 application?
I am now the owner of a Struts-1 application, and the Hibernate session management is all over the place. I have searched online documentation but have not found a clear explanation of the best way ...
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3
votes
1
answer
1k
views
How to paginate local and remote data?
My team is currently facing a problem that we don't know how to tackle.
Some technical details: we use Java 8, Hibernate, Spring, MySQL, and AngularJS for the front-end.
We need to do pagination on ...
- 33
3
votes
1
answer
3k
views
Are there any alternatives to Hibernate Envers 3.6.2.Final?
I'm currently evaluating Hibernate Envers 3.6.2.Final; an auditing module part of Hibernate.
As far as I am in my evaluation, I feel a little disappointed by Envers. I would expect much more from it ...
- 135
3
votes
2
answers
392
views
What to do when putting logic into the database seems to be the only option?
I am currently working on an application that models a complex business process that consists of many steps, each having a 1:n relationship with subsequent steps. The software is written Java using ...
- 149
2
votes
1
answer
261
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How to correctly translate UML Association, Aggregation and Composition to a Hibernate mapping?
There is a number of questions about the differences between UML Association, Aggregation and Composition out there and many many answers, some practical and some phylosofical. Here I'm asking we talk ...
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2
votes
2
answers
366
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Query with a lot of fields and joins
I have to map a legacy database with tables that have a lot of fields and relations.
For example (simplified code),
@Entity
@Table(name = "VISIT")
public class VisitEntity {
@Id
private ...
- 29
2
votes
1
answer
6k
views
How to represent and validate website URLs for a JPA entity
I have an application that will allow the user to enter and store (in a DB) a website URL for a company. The only requirement (as of now) beyond entry of the website URL is to validate that the URL is ...
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votes
1
answer
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How, in Three Tier Architecture is Database Access Achieved
So I am attempting to make an application based on the architecture proposed by this image;
(source: ibm.com)
[1]
However, I am getting very confused with how data access is achieved between the data ...
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2
votes
1
answer
8k
views
Java desktop application using MVC + Hibernate
I'm developing a Java desktop application. I'm planning to use MVC architecture described at Oracle site: Java SE Application Design With MVC.
I need to store data in database so I decide to use ...
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2
votes
1
answer
340
views
Sorting rows off an autoincrementing primary key
Is it a bad practice to rely on an auto-incrementing primary key to sort rows in a table? A coworker and I were having an argument about this subject. We need to be able to find the last-inserted row ...
- 121
2
votes
1
answer
356
views
Can I reduce locking for this scenario using Hibernate and H2
My Java application uses Hibernate and H2.
It process music files within folders. Typically for a folder it would read the files in the folder and store each file as a Song class in database, then ...
- 123
2
votes
1
answer
111
views
How to optimize a bloated entity that causes a huge query
I have an application that exposes a series of Web services. One of my entities has a bunch of one-to-many and many-to-many relations to other entities. My transactionality level is at DAO, and I'd ...
- 267
2
votes
2
answers
2k
views
Using Hibernate Criteria framework for complex queries vs. just making views in DB
I like using Hibernate for regular simple CRUD operations.
However, I am trying to understand why anyone would resort to its Criteria framework to assemble complex recordset criteria as opposed to ...
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2
votes
2
answers
259
views
How to handle deleting record with associated records?
This is not a technical question but rather about the right logic on handling delete with foreign key constraint. In my exercise app, I cascaded the record with OneToMany relationship with other ...
- 121
2
votes
1
answer
258
views
Is it a good design to have separate Hibernate entities for general user info and user password digest?
I'm developing an app with a user management system. There is a database table named user with the following columns:
| Column Name | Column Type |
|-----------------|-------------|
| userId ...
- 121
2
votes
1
answer
4k
views
Best way to handle lazy models with mapstruct and spring transnational scope
In a typical Java Spring Web APP:
we have the following layers:
Model [DB Models]
Repositories [where you have queries to DB]
Services [Business service where you have the @Transactional annotation]
...
- 441
2
votes
1
answer
157
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Reattachment of full entity graphs for frontend/backend applications which communicates using REST API/JSON?
I am trying to develop business application with separated backend (persistence, business logic, server side workflows) and frontend (presentation, some business logic) which communicates using REST ...
- 1,003
2
votes
2
answers
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How do I integrate hibernate and REST web service in java?
I am going to develop which will be web application as well as mobile (android / iOS / windows) application. The database in this application will be managed by Hibernate. Also as it is cross platform ...
2
votes
1
answer
1k
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Hibernate building HQL queries
I just read hibernate reference and they say that you should use constans for HQL queries. However that is not always possible, for example if you do search function and have 10 criterias (not jpa ...
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2
votes
0
answers
39
views
DataBase design generated by hibernate Many to Many for MariaDB
Hi I am in middle of designing DB and Got a little bit confused about DB Design.
I am Using Hibernate as ORM Tool ahd mapping between Page and Step entity in hibernate.
@ManyToMany(fetch = FetchType....
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1
vote
4
answers
3k
views
When using Hibernate can we forget about Database Design?
We started (just me and my friend) working on a website. As a part design phase we have finished the drawing a Site Map, decided on the content in each of the web page and the navigation.
As we want ...
- 1,027
1
vote
3
answers
816
views
infrastructure software/technologies for developing web service [closed]
[Edit: Thanks S.Lott for the hints]
I'm developing a web service from scratch. The service could have potential of 10,000 requests a day. Actually, to be honest, requirements aren't that clear at this ...
1
vote
1
answer
327
views
ORM: Keep entities coherent in a cache or retrieve entities each time?
We have a tricky question in a project using Java & Hibernate, with a model containing bi-directional relationships.
As it's a small project with few users, few entities, and few rows involved in ...
- 113
1
vote
1
answer
587
views
Does separating Domain model and Persistence model have impact on transactional aspect?
In this post, there is:
For example, with your own persistence model, you are not able to
benefit from the built-in change tracking functionality. And that
means you will not be able to ...
- 3,858
1
vote
1
answer
831
views
How to reuse boilerplate code for Hibernate session management?
My Java application uses Hibernate as an ORM framework. I find myself often writing code like this:
Session session = HibernateUtil.getSessionFactory().openSession();
try {
session....
- 3,137
1
vote
1
answer
2k
views
DTO and JPA Version
I have DB tables representing Employees and Departments. The server side(JavaEE) contains JPA entities representing the same.
The client is a standalone client and communicates with the server using ...
- 11