All Questions
16 questions
1vote
1answer
96views
Refactoring duplicated code with abstraction and generics
I have written simple command line project with Spring. And from what I think quality of code is pretty poor. I see what I could improve to remove duplicated code, but somehow I have no idea what ...
- 85
1vote
1answer
3kviews
Handling multiple optional parameters in Spring
I have an endpoint in my RestAPI which can receive 3 optional parameters and then find information in the database with these parameters, also it is possible to combine the parameters. So, in my ...
- 13
3votes
0answers
51views
Separation of database and network calls
I have a API and the corresponding service method is like this: ...
1vote
3answers
1kviews
User Id generator
Hi guys below is my code to generate random long unique Ids, I use System.nanoTime to generate long Id but now to make sure that it doesn't clash in the database with previously created Id I get all ...
2votes
1answer
116views
Copying notes takes a very long time
I am working on a Spring-MVC application in which we have note like functionality. Notes can have attachments, history, etc. There is a method to copy notes. When a note has a large number of ...
- 257
2votes
0answers
4kviews
Pagination using Spring MVC and Hibernate
My company develops a Spring web application that exposes a REST API and right now we're starting to look into pagination for the methods that load data from some heavy tables. We initially looked ...
- 121
1vote
1answer
6kviews
Map DTOs and Models within the Service Layer due to a missing Business Layer
The following is the story of a UserCredentialsDto that arrived at one of my endpoints and how it finds its way through all the layers namely REST Layer Service ...
- 193
0votes
1answer
1kviews
How to avoid duplicate code due to the impossibility of using multiple inheritance
I'm working on a Spring - Hibernate App, and I have a question about how to correctly avoid duplicate code and using Hibernate, due to the impossibility of using use multiple inheritance (I usually ...
- 113
0votes
1answer
46views
Implementation of getUsersWithStatuses based on getUsersWithStatus
In my code I have method which gets users from database with concrete status. And now I have to add new method which gets users from database with list of statuses. I don't know, is it better to ...
- 121
4votes
1answer
168views
Code for my first crud app
I would like to ask more experienced developers to review my code, it's my first app, self-made, I know there is a lot to improve, it would be great if you could just point the main errors. I'm ...
- 173
2votes
0answers
173views
Implementing a long-running entity lock
Requirement I have an entity named ImportData which can be processed once in order to extract data from a file fed to the application. I need to make sure that, in ...
3votes
1answer
6kviews
Customize data types in a generated model with hibernate
I have a Spring/Hibernate application with the following domain class (irrelevant code stripped for brevity): ...
- 123
1vote
1answer
63views
Retrieving three separate sorted lists of items
I need to search for records based on their area, postcode, city and sort each group ...
3votes
2answers
207views
Performance enhancement for collection manipulation
I have below snippet of code which gets all the available menu items for a zone(top or left)and adds the widgets for which user has access to an ArrayList collection. For now the getWidgetsByZone(zone)...
- 747
5votes
1answer
4kviews
Create better Base DAO class
I created a DAO class which is base class for all other DAO classes. I use Spring Framework 4 and Hibernate 4. Question: Is there anything that could be done better? ...
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