I would like to know how if there is any way to automatically generate a database administration site for a Spring + JPA project. It should take the annotated JPA entities and dynamically generate the site to keep track of any change in the domain Java classes.
I am looking for something similar to the Django admin site (I think you can also do the same with Ruby on Rails), that allows the user:
to see and update the data in the different tables without developing any extra code
to handle relations between tables, different kind of data (numbers, dates, etc)
In the Java world I am only aware of Spring Roo, but it does not fit my needs because I want to integrate it into an already existing third-party project.
Try Play! Framework's CRUD Module
Related
I'm new to Jhipster and I'm trying to understand how Jhipster entity generator work.
I'm trying create 3 simple class: Person, Professor, Student. I created a first entity (Person) and then I would like to create a second one (Professor) and make it extend to the first one but it's not proposed.
How to make the "professor" extends to "Person"? Am I suppose to do it directly on the code or did I miss something somewhere?
As per the docs https://www.jhipster.tech/jhipster-uml/ inheritance is not yet possible by jhipster entity generator yet.
But you can do it manually once entity generator generates the entities.
See this too.
https://github.com/jhipster/jhipster-uml/issues/96
jhipster generates entities not only as classes (spring beans), but also for everything else in the "jhipster-construct": Spring security, relationships, database layout incl. liquibase database refactoring, services, repositories, DTOs, the frontend components with Angular or React, validation and integration and performance tests for back- and frontend. And all in a "best-practice"-manner, with i18n related stuff etc., including two stages, a development and a production profile (with a database for each stage). Additionally, jhipster provides you with all the configuration to deploy contionuously to e.g. heroku with jenkins controlling your git pushes.
To build abstract (java) classes or (java) interfaces isn't possible this way. That may make sense in some business logic, which is to be implemented after generation or there may be other ways than inheritance (e.g. see services and dtos).
The jhipster-generated construct for backend and frontend - or even for microservices and gateways - shows the paths to stay on.
You can manage a lot of things that persons and professors share with OneToOne- or OneToMany-relationships between them and/or additional entities by thinking of database normalization - at least, I have done it this way :-)
I'm new with Spring and I would like to use Spring Data with Jpa, Maven and Mysql in Eclipse environment. Then I'm going to use Tomcat as application server
I read a lot of tutorial but all of them are different from each other therefore don't understand what I have really to do. At the moment I'm confusing between these technology and DAO/DAL structure
Must I use Hibernate?
I have to use it with java JPA and then I have to add Spring data?
If anyone has an example or a tutorial I thank him.
Official spring data link
For spring-data-jpa,maven,mysql,hibernate,eclipse example tutorial
Hibernate is optional, it depends on your use case what you want to do. Its a ORM for mapping your db tables into java objects and have lot of other features like session caching, second level caching, criteria queries, validation, search/filters etc.
If you are just testing queries to load data you can use spring jpa queries directly, you will find examples in spring-data-jpa link
I have two tables, each with about 10 columns. I need to develop a CRUD web application that can search, read, update, create or delete records from this table. The update is limited to two fields - status & a date field.
I was wondering what is the quickest way of achieving this CRUD application. We use java / Oracle Application Server 10g (I know, I know!!), so I guess the CRUD application needs to be in java. Also because it is an internal app I don't really need it to be super robust and fancy and all. Just a basic functionality that works with a web UI. We use vanilla servlets / jsp now.
TL;DR I guess (not sure) my question is about which framework I can use to achieve FASTEST results for a CRUD application for a 2 table schema.
The simplest way for Java/CRUD scaffolding from an existing database
is probably the Telosys Tools code generator
( see https://sites.google.com/site/telosystools/ )
( and tutorials https://sites.google.com/site/telosystutorial/ )
openxava
Others
Spring Roo
JBOSS Forge
You can use Jboss forge creating a simple crud application
Steps to create a simple crud application with JSF CDI and Hibernate are listed here
my question consists of 2 parts
if I have a bean could i automatically generate the form from it
if i have many beans , is it possible to automatically generate a workflow of the automatically generated forms from these beans
i need this to generate form from ontology
I have done something like this using the Play! framework and Empire, which is an implementation of JPA 1 using SPARQL & triple stores in place of SQL & RDBMS.
I created Java beans annotated by Empire, which I can use to persist into my triple store, and combined with Imperium, the Empire plugin for Play!, I can use the Play! framework's built in CRUD form generation to create entry forms for my beans.
I wrote both Empire and Imperium, fwiw. There are other frameworks for semantic web bean persistence, such as Alibaba, but none that I'm aware of that integrate nicely with JPA or a web framework such as Play! which will support the CRUD form generation automatically.
You could try looking at Appfuse. You can watch a video demo of CRUD with Struts2 at http://demo.appfuse.org/ to see if it is going to be of use to you.
may i know in eclipse, is there any feature that will auto generate domain objects with all table relationship properly mapped in class?
can provide me with some reference articles on this?
You can use something like Hibernate to accomplish this
This plugin set for Eclipse called Hibernate Tools for Eclipse and ANT will do most of the work for you.
In particular it will do Reverse Engineering: The most powerful feature of Hibernate Tools is a database reverse engineering tool that can generate domain model classes and Hibernate mapping files, annotated EJB3 entity beans, HTML documentation or even an entire JBoss Seam application in seconds!
Telosys code generator does this kind of job.
It's an Eclipse plugin, it uses the database schema to create a light model
that is used to generate the Java code.
There are some predefined templates available on GitHub (for JPA, POJO, Documentation, Spring MVC, etc )
See http://www.telosys.org
and http://marketplace.eclipse.org/content/telosys-tools
Templates : https://github.com/telosys-templates-v3
Articles about code generation with Telosys :
https://modeling-languages.com/telosys-tools-the-concept-of-lightweight-model-for-code-generation/
https://dzone.com/articles/telosys-a-code-generation-tool-by-laurent-guerin
You can use Hibernate Tools 3.0.0.GA either via Eclipse or ANT to auto-generate your hibernate domain entities directly from your database tables.
See tutorial here :
http://docs.jboss.org/tools/3.0.0.GA/en/hibernatetools/html_single/index.html
I have a solution for you i.e to create auto generate domain objects with all table relationship properly mapped in class ...Try Dal4j yes you can find it in sourceforge.net/p/dal4j/wiki/ DAL4j is a Command Line and Framework tool that can be used to reverse engineer a MySQL or SQLServer database schema into a set of JPA Entity Beans.
DAL4j can be useful for scenarios where there is an existing database schema but a technology other that JPA is used by applications to interact with the database. DAL4j can provide an easy way to migrate your code base from other technologies such as JDBC or Hibernate to JPA.
The beans generated can be 1 or two types: Simple or Framework. Simple beans are standard pojo classes managed by your application using JPA semantics. Framework generated pojos use the DAL4j framework DAO generic to simplify CRUD operations.
DAL4j provides optional hooks to allow you integrate encryption/decryption of data fields that must be encrypted in the database.
Last, DAL4j provides a set of Generic classes that can be used to simplify creation of Session Beans which perform CRUD operations using generated Entities.
I think you will find this article feasible....
You want an object relational mapping of which Hibernate is the most popular for Java. The hibernate tools are typically better for taking annotated classes and using them to generate a schema, as opposed to vice versa, which is what you sound like you're doing. I suspect you'll be doing a lot of hand-annotating if you're working with a legacy DB schema.
if you use grails, you can generate domain objects with GRAG http://sourceforge.net/projects/grag
I use eclipse for java development, but when it comes to generating domain entities I use Net beans.
Create an EJB module, and then right click and generate entities.
You need to set up the database also you can select the tables you want visually.
Regards
Lyju
It feels like another rather common question that people always run into.
The link below links to a blog detailed enough for me to learn how to generate entities from database schema the first time.
http://shengwangi.blogspot.com/2014/12/how-to-create-java-classes-from-tables.html
Just in case, the following link refers to eclipse help page. This link should never expire:
http://help.eclipse.org/juno/index.jsp?topic=%2Forg.eclipse.jpt.doc.user%2Ftasks021.htm
I downloaded JBoss and failed to understand how it works. I think the plugin that I used is Hibernate Tools but I am not sure as I did not install any new plugin for this purpose. I am using Eclipse Luna for EE.
Hope this helps.
I got so tired of manually coding this kind of stuff so I made a tool to generate models, dao, and dao implementation from a schema. It's oriented towards spring boot and only tested on MySQL, but for those that don't want to use Hibernate and just want to work with jdbc/sql and JdbcTemplate, or just want POJOs with getter/setters generated for tables, then this could perhaps be something to kick off the coding.
Called Jassd (Java Automated Spring Source-code for Databases generator), I'm "jazzed" to introduce this tool: https://github.com/aforslund/jassd