Questions tagged [spring]
Spring is a module based open source framework to build robust Java / Java EE applications.
281
questions
-3
votes
0answers
42 views
I Need to Mock a Database in Springboot, with Tables, Schemas, and Stored Procedures [closed]
I have a Spring application that interfaces with a database (specifically, a MariaDB database). In the database are several schemas, with a handful of tables and stored procedures in each.
In the ...
0
votes
0answers
35 views
How should I handle keys in production
I'm creating an authorisation service, which does signing using a key.
For local development I was randomly generating a key on application start-up.
Now I'm deploying to the cloud (currently going ...
1
vote
1answer
63 views
Implementing transactional entity lockouts with Spring and JPA
Spring Boot/Java 8/MySQL here.
I have a widgets table in my MySQL DB that is modeled by a JPA entity like so:
@Entity
@Table(name = "widgets")
@Data
public class Widget {
@Column(name = ...
0
votes
3answers
143 views
Is it an anti-pattern to extract common configuration code as a library and reuse it across microservices?
Is it an anti-pattern to extract common configuration code as a library and reuse it across microservices?
I am breaking down a monolith app into a few of microservices. What I stumbled upon is: since ...
0
votes
0answers
19 views
How to draw internal patterns used by the Spring boot framework in UML class diagrams?
I am currently in university and doing some practical work as a module. The professor demands that we work with the waterfall model and we are currently in the design phase.
The requirements for the ...
0
votes
2answers
64 views
Frontend/backend SPA communication: how to handle a list of string options
I have single page application with an Angular frontend and a Spring REST-backend.
What is the proper way to handle a list of string-based options in the fronted the enduser can select from, which ...
0
votes
1answer
25 views
How best to structure my Service/Repository layers when persisting a Many to One object?
I'm working on a project where I need to do CRUD operations on Book and Library objects. Naturally the relationship between Book and Library is Many to One, like so:
@Entity
@Getter
@Setter
@...
1
vote
1answer
201 views
Authentication with JWT in HTTP only cookie without refresh token
The motto of the upcoming question is "I don't know what I don't know".
I would like to know if there are downsides or security risks with an authentication implementation.
Right now, I'm ...
0
votes
2answers
111 views
Which design pattern to use to make a mix of in-sequence and parallel HTTP calls?
We have to make a bunch of HTTP calls from Java/Spring-Boot application which will be mix of in-sequence and parallel.
Level 1 : We make 3 parallel calls to Services 1 , 2 and 3
Level 2: After service ...
0
votes
0answers
34 views
Using JWT token to create spring session
I have a web application like this:
An angular frontend for client and a spring MVC backend for admin panel.
A angular web application requests a JWT token from tomcat/spring MVC.
The angular ...
0
votes
1answer
71 views
How to use single Spring-Boot instance to cater to multiple environments?
We have a Spring-Boot Web application currently deployed to 7 environments (DEV, SIT, UAT, Pre-Prod, Prod, etc.). This application connects to other REST services, which has different URLs for each of ...
-2
votes
1answer
51 views
Approach to build a modularity Java (Web) Application
I'm on the way to build a modular Java web project with some pluggable modules - like Jira and Confluence for example.
My first thought was to build a project with Spring and OSGi, I started finding a ...
2
votes
4answers
295 views
How to compare passwords which is stored in DB in encrypted form in secure way?
Recently In an interview I was asked this question -
Question- If are storing passwords in encrypted format in DB and in future when user login into our website how will we perform authentication?
Me:...
0
votes
2answers
84 views
Interface and Implementation Classes
I know various forms of this question have come up before, but none of them quite seem to answer in a way that I can apply to / understand in relation to what I regularly see others doing. ...
0
votes
1answer
97 views
Does it make sense to create a WAR anymore?
This is more specific to spring boot projects and applications whose main USP is its APIs. Now that we can simply create a JAR file deploy it anywhere, what is the point of WARs? Is there a specific ...
0
votes
1answer
167 views
Spring Boot + MongoDB project structure and database creation
I'm planning to start a new Spring Boot project with MongoDB. I'm very familiar with Spring Boot, but all of my past projects used MySQL.
Each of my projects has the following directory, that holds ...
0
votes
0answers
47 views
How can I design a secure content verification web application?
In my country, there is a high number of fraudulent doctor's sick letter as they are manually written on paper. I'm designing a web application to combat this issue and have the whole process ...
2
votes
0answers
120 views
Determining when to use Serverless vs Containerized application (AWS Lambda vs ECS) - Is Java Spring dead?
I work for an organization that heavily leverages AWS. There is a strong push that every team move from containers deployed on ECS to leverage AWS Lambda and step functions for (almost) every project....
2
votes
1answer
71 views
What are the best way to publish application event in a spring boot application?
My goal is to collect/publish different types of information from the application. We use Kafka for the event bus. Consider the following sample code.
class UserService {
public User ...
2
votes
1answer
728 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]
...
1
vote
0answers
33 views
Reusable module using spring framework with spring-boot application modules?
I have a maven module which will handle DB interactions for various scenarios. I want this module to use spring framework so we can leverage the standard DI and integration test capabilities. This ...
-1
votes
3answers
197 views
Should methods with business logic be made private? [duplicate]
So I am writing a project using Spring Boot. All of my logic resides in @Service classes. I have separated each service class based on entity. For example - If I have two independent entities A and B, ...
0
votes
1answer
58 views
Structure and placement of a exporting module
Its an infrastructure monitoring application.
We have a spring boot (2.x) based Service Oriented Architecture (SOA) with multiple modules in our project and the center point is a REST services module ...
1
vote
2answers
201 views
Confusion about layered architecture
Given a layered architecture consisting of
presentation layer
business logic layer
data (access) layer
and a SPA web application communicating through REST endpoints with the backend (eg Angular and ...
1
vote
2answers
112 views
Authenticating requests from third party users to our APIs
We have a web app which has certain APIs. Users of our webapp will use these APIs when they login to our webapp (like how many records me as a user do I own, user specific, etc). We are creating ...
1
vote
0answers
334 views
How to achieve both: clean (hexagonal) architecture with JPA goodies?
How do I achieve two things at the same time writing Java Spring Application:
Clean Architecture
JPA goodies (@Transactional, Optimistic Locking, dirty checking, etc.)
I like the idea of database/...
2
votes
3answers
161 views
Layered architecture horizontal dependencies
I'm working on a spring boot REST service.
It's divided into three layers: REST controllers, services, persistence/DAO.
We have multiple services and persistence repositories. We have the following ...
1
vote
1answer
85 views
Where to handle duplicate key exceptions in multy layer application
+-------------+ +--------+ +----------+
| repository +-------->+service +------->+controller|
+-------------+ +-^------+ +------------+
+-------------+ | ...
0
votes
1answer
4k views
Best practice for references in DTOs and entities in Spring
Given the following architecture and frameworks:
Spring Boot Application with Spring Data JPA (Hibernate is used as OR mapper); layered architecture as followed.
REST layer
Service layer
Persistence ...
0
votes
2answers
760 views
How to design front-end to handle multiple back-end versions
In my company, we're using Spring Boot to implement backend API and React to implement frontend including Web interface and Android/iOS apps.
Since our product is an Enterprise software, customers ...
4
votes
2answers
342 views
How to avoid DI dependency cycle for observer pattern
In my project I'm using the observer pattern in several places, i.e. the subject notifies the observers about something, and expect them to act. The subject does not know anything about the details of ...
1
vote
2answers
101 views
Web server archicture
This may seem like an odd question but it's something I've yet to find a "proper" answer for. I've tried googling but I don't get anything useful (maybe I'm looking for the wrong terms).
I'm ...
1
vote
1answer
188 views
Spring Boot/Batch: Should every Job be separate Maven module?
I'm building a backend service powered by Spring Batch which enables to define and Jobs.
Currently, I have several jobs, that essentially, aren't related one to another.
So,
I have one application....
2
votes
1answer
279 views
How to build a modular/extensible Spring Boot application?
I'm developing a Spring boot / Batch application.
What I'd like to do is to have a separated module for every job. This is a reasonable decision because different tasks (Spring Batch Job) have ...
0
votes
0answers
3k views
Spring Data MongoDB: Update document based on multiple identifiers with Composite ID vs. MongoTemplate upsert vs. MongoRepository find & save
I'm wondering for best practices to upsert a document based on two identifiers.
@Document(collection = "cars")
public class CarEntity {
@Id
private ObjectId id;
private String ...
0
votes
1answer
3k views
Is it okay to have one Service with two different Repositories in Spring Boot MVC?
I have a backend Spring Boot API that should have one(?) endpoint that returns some statistics to display in a frontend. These statistics are calculated from data that comes from two different ...
-1
votes
2answers
146 views
is this microservice design fine?
I have recently decided upon a micro service design to merge two Spring Boot applications.
I basically have 2 applications that deliver two entirely different front ends, but share user accounts.
...
3
votes
2answers
390 views
Where to save JWT token?
We(in my company) use to save the JWT token in the cookie. The web application is on Spring boot + JSP application. So the flow is, in a successful login service send a JWT token, that token has been ...
2
votes
1answer
103 views
Handling OAuth 2.0 access token
I am creating a rest template to consume REST API secured by OAuth 2.0.
The provider has implemented an expiry for the access token for 5 mins. So Using the rest template, I will be calling the ...
0
votes
1answer
46 views
Where Should You Add a Shared Maven Module as a Dependency in an N-tier Architecture
In a simple web architecture using Spring and Maven where it consists of following layers:
Controller
Service
Repository
Shared
Where in shared module all the classes that are used among different ...
0
votes
2answers
131 views
How to design a process and use the business rules for sending alerts/notifications
Currently working on designing a process which demands me to send alerts like email notifications to the users which meet a business criteria(we can also call business rules).
I want to make this ...
3
votes
1answer
361 views
Is this a good design for wrapping asynchronous API calls into a RESTful interface?
I'm working with an API that has many asynchronous calls and handlers. I'd like to extend these with a RESTful interface and endpoints in spring. I'm imagining the usual Controller and Service layers, ...
1
vote
0answers
18 views
Spring Security SAML and RSA session
This is probably a design/architectural question.
My app uses RSA initiated SSO using SAML for authentication and from there on my app uses its own session to manage the request. There is a flaw in ...
-1
votes
1answer
56 views
If you use Spring dependency injection does the unit test require some Spring stuff?
I completely understand, I think, how injecting a dependency of a class allows that dependency to be mocked and the class to be tested with the mocked version.
What I am not sure about is if you use @...
-3
votes
1answer
90 views
Should vanilla solutions be avoided in Spring web applications?
I am making a Java and Spring webapp that scrapes data from a web and then publishes it through an API. Some of the raw scrapped data is in the form of Set<SomeObject> which I then convert to a ...
1
vote
1answer
132 views
Best approach to handle user statuses and keep their history
I am developing a Spring application which has a few different modules. There will be a bunch of users added in the database.
I want to add a feature, which will allow me to track users' availability,...
-1
votes
1answer
121 views
What is the best practice to insert two similar records in sql server db table which will be sent to two different destinations?
I am working on parsing a file and inserting records into SQL Server DB.The database table structure will be something like this:
A Users table which contains (id, name, address, destinationName,...
0
votes
0answers
82 views
oauth2 + angular - Most elegant way to pass the JWT auth token
I have an angular application, which is querying an API as a client (written on Spring Boot 2.2.1 + Spring 5.2.1) that supports 3rd party authentication over OAuth2. The API has altogether 3 different ...
0
votes
0answers
47 views
Is it a good practice to store session in two different places?
I have a use case like this and I am wondering if this solution is a good practice or not.
Say I have a website called dashboard.com and this is only for US region. When users login here, I am ...
11
votes
3answers
4k views
“Depend on abstractions, not on concretions” what is the exact meaning of this term
I was reading SOLID principles on a website, in which for D - Dependency Inversion Principle it says:
“Depend on abstractions, not on concretions”
In other words. we should design our software in ...
