Questions tagged [spring]

Spring is a module based open source framework to build robust Java / Java EE applications.

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Understanding the data flow in Spring REST layered architecture

I am new to Spring as well as layered architecture. So am a bit confused as how data flows among the different layers. What so far I have understood is: Layers: Controller (which accepts requests) ...
Jignesh M. Khatri's user avatar
5 votes
5 answers
2k views

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 ...
Sriram Sridharan's user avatar
4 votes
0 answers
2k views

Spring bean injection into a hibernate validator constraint

I have a controller method like listed below whose argument is annotated with @Valid to validate PasswordChange object using a Hibernate validator @Constraint. Both PasswordChange and a sample ...
ShaggyInjun's user avatar
3 votes
0 answers
62 views

Cache updates after not related REST request completes

I am wondering about the following scenario - it's in the land of Spring/AOP and Ehcache. Happens in REST Web Application - REST/Service/DAO layers - I have objects in cache (@Repository + @Cacheable)....
hovanessyan's user avatar
3 votes
0 answers
38 views

Approach for querying an arbitrary set of user submitted fields and values in Spring application? Like a shopping site sidebar search?

I am working on a Spring Boot and Angular application which has a requirement to search based on any number of the available filters being applied to a list. For example, a user searches on 'Title' ...
Joe Essey's user avatar
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Camel/EIP/ESB with messaging from a website to process an order; synchronous and asynchronous

I am investigating Camel for connecting various services. I understand the core concepts but I was curious about more specific implementation details. This application would have a browser client ...
berlinbrown2's user avatar
3 votes
1 answer
80 views

Getting instances without using the Spring context

I'm writing a small game of life implementation with Spring, but trying to avoid referencing the Spring context within my code. I have two interfaces, Board and Cell. In each implementation of Board ...
user1690293's user avatar
2 votes
0 answers
478 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....
greenJavaDev's user avatar
1 vote
0 answers
126 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 ...
emeraldjava's user avatar
1 vote
0 answers
5k 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 ...
Bennett Dams's user avatar
1 vote
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31 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 ...
Arun's user avatar
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dealing with too many DTO / Java

We are building an pseudo-rest API (because no body cares/funds for a full blown rest API for internal use - which is OK). So we have elements of Rest API (links for resources, API naming conventions ...
Dexters's user avatar
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1 vote
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644 views

Performance impact of JPARepository save() on a large database table with index

We have a few tables with a large amount of data and with indexes on those tables to help in faster retrieval. We are also using Spring Data JPA JpaRepository for adding data to those tables using the ...
phoenixSid's user avatar
1 vote
0 answers
106 views

Is separating a Spring Boot REST API into interface and implementation a good practice?

I "herited" a lot of Spring Boot code which is basically an asortment of REST Webservices. All those webservices are separated into an interface and an implementation and I find it hard get a grasp of ...
Marged's user avatar
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Putting the rowmapper inside the domain class

Normally in java the RowMapper is placed in its own class. Instead, what about this design, putting the RowMapper inside each domain object, and giving all of them a consistent name: public class ...
Ariel's user avatar
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1 vote
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480 views

Maven plugin to operate at parent and child module levels?

I have a large multi-module java/maven application where each child module is it's own java application and the root parent pom defines the standard dependencies pom.xml - parent pom - child1/pom.xml ...
emeraldjava's user avatar
1 vote
0 answers
2k views

Using import.sql vs persisting JPA entities

In Hibernate ORM & Spring Boot, during the SessionFactory creation, SQL DML statements can be executed to create tables and/or insert data via files such as import.sql defined in the javax....
David Yee's user avatar
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1 vote
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Is there a way to handle shared javascript assets in Spring?

I'm familiar with MVC web frameworks and lately very familiar with Symfony2. I want to start learning Spring, and the first practical problem I would like to try to solve is handling the reuse of ...
dukeofgaming's user avatar
1 vote
0 answers
346 views

Implementing a universal timer for a game with multiple players in spring mvc

I am trying to create a simple online card game with multiple players. Basically, there's a dealer and multiple players. I have have already implemented most of the game and it's working fine. now I ...
user3308224's user avatar
1 vote
0 answers
1k views

Multiple long polling requests: bad idea?

I am designing a web server that handles multiple things such as a user-to-user chat, a user-to-group chat, friends request, forum etc. The chats have to be real-time chats, the friends requests ...
Thüzhen's user avatar
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1 vote
0 answers
871 views

How to integrate google search results in a spring mvc app

Here's what am trying to do (and searching for similar hasn't shown any results anywhere): On my website - provide an input box which will search google for results. I want to display those results ...
happybuddha's user avatar
1 vote
0 answers
649 views

Atmosphere + Long Polling : No message distribution?

I'm experiencing a strange behavior with Atmosphere + Long Polling. I'd like to have a broadcaster per user, so I have registered a broadcaster on resource suspension with id : /user/. I use ...
Zenithar's user avatar
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1 vote
0 answers
2k views

Spring AOP advice order

In Spring AOP, I can add an aspect at the following locations before a method executes (using MethodBeforeAdvice) after a method executes (using AfterReturningAdvice) around a method (both before and ...
Chetter Hummin's user avatar
1 vote
2 answers
376 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 ...
Brooklynn99's user avatar
0 votes
1 answer
217 views

Rest API Layered Architecture Java / Spring / JPA

Currently, all REST applications I work with have a three-layered architecture: Persistence -> Contains "entity" classes with JPA annotations / Spring Data JPA repositories Core -> ...
Lawrence Beutlich's user avatar
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0 answers
57 views

Spring data exchange between components?

Please advise me what pattern to use in following case: I have a Java/Spring Boot application. There is a component with @KafkaListener method which receives Kafka Messages on CRUD of various subject ...
ALZ's user avatar
  • 107
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0 answers
475 views

How to pass the entity's domain to the repository layer - clean architecture and spring JPA

According to Should I use a layer between service and repository for a clean architecture - Spring the Peristance layer is deprecated because the Repository is already an abstraction. UML solution of ...
Adri's user avatar
  • 101
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0 answers
108 views

Design : How to divide the responsibility in micro services

I have two micro services built using spring boot, One micro service is: "payment" Which handles actions related to payments. Like creating a payment link. Getting the latest status of ...
aravind's user avatar
  • 101
0 votes
0 answers
81 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 ...
Tobi Akinyemi's user avatar
0 votes
3 answers
202 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 @...
hfg124g76g1's user avatar
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180 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 ...
desertSniper87's user avatar
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60 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 ...
Siya Stoan Sosibo's user avatar
0 votes
1 answer
151 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 ...
Shubham's user avatar
  • 57
0 votes
0 answers
163 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 ...
Romeo Sierra's user avatar
0 votes
0 answers
56 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 ...
theprogrammer's user avatar
0 votes
0 answers
68 views

Two Web clients and Java server (HTTP and Websockets)

I have 3 software components of a Web Application: 1. JS-client application 1 (JSApp1) 2. Java Spring (REST and Websockets) server app (SRV) 3. JS-client application 2 (JSApp2) My current task is to ...
Andrii's user avatar
  • 41
0 votes
0 answers
2k views

Are prototype beans with constructor parameters an anti-pattern?

Reading on this, Misko Hevery has said “Newables can ask for other Newables in their constructor, but not for Injectables” Now it appears to me that requesting a prototype be instantiated at run-time ...
blindcodifier9734's user avatar
0 votes
1 answer
753 views

Spring JDBC Template without DAO?

I am rather new to writing applications that interact with databases, and I'm curious about a project I'm working on. I have to write a very simple web app which is going to be displaying metric data ...
user3311675's user avatar
-1 votes
1 answer
50 views

Picking data store for Location Tracking Based Application

I have one design problem for one of my projects based on location tracking. The scenario is I have multiple devices(for some business) all over the city and have GPS installed inside, the device is ...
Praveen kumar's user avatar
-1 votes
2 answers
120 views

Best practices for API design for an E-Commerce System

I have a few basic questions on how to implement an API for a basic e-commerce system. The relevant entities are Customer, Puffle, and Review. Each Puffle can have zero or more Reviews. Each Review is ...
Richard Robinson's user avatar
-1 votes
1 answer
140 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,...
Brooklynn99's user avatar
-1 votes
1 answer
780 views

IOC principle - Servlet container implementation

IOC principle can be implemented, using either: Dependency Injection Service locator pattern This article also supports these two approaches for implementing IOC principle. Spring IOC container is ...
user1787812's user avatar
-2 votes
0 answers
18 views

Migrating from Spring Boot WebFlux to MVC

I have a few microservices that I'd like to migrate from Spring WebFlux to Spring MVC. Are there any general tips of how to do this? As I understand it it's difficult to have them both at the same ...
softarn's user avatar
  • 198
-2 votes
1 answer
136 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 ...
Jack's user avatar
  • 265
-3 votes
1 answer
96 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 ...
Hertzu's user avatar
  • 15