I'm new to java, hibernate, spring roo and spring mvc.
I'm using Hibernate annotations and POJO classes.
My IDE is Spring Source (based on Eclipse)
What hibernate query editor do you suggest for testing hibernate queries?
I've tried installing jboss hibernate tools for eclipse, but had no success in configuration.
When I try to browse Database, I'm getting this error
An internal error occurred during:
"Fetching children of Database".
org.slf4j.spi.LocationAwareLogger.log(Lorg/slf4j/Marker;Ljava/lang/String;ILjava/lang/String;[Ljava/lang/Object;Ljava/lang/Throwable;)V
I've tried to configure maven to use older version slf4j (1.5.8) but that didn't resolved the issue.
I've found recommendation for HQE editor,
but it's not available https://hqe.dev.java.net (Not found)
What is the easiest way to try Hibernate Queries? What tool do you suggest?
I am not sure why we need query editor for hibernate. Since the idea of hibernate was to make sure normal java developers can write query without sql knowledge.
When I developed hql, I used to just create join using java objects in eclipse. and then copy that to the query. And run the application to see if the query is fetching desired result. This method is tiresome, but still you don't write much of queries in hibernate, and also you will get used to syntax with just few queries.
And usually you will fetch by lazy loading and never use hql.
Still if you have a better way, I will check this blog.
Try Squirrel. It can do queries using hibernate.
Related
A maven JEE project using JSF, JPA (EclipseLink 2.3) is using MySQL comminity edition as the database. With the size of the database exceeding 20GB, there are database related peformance issues. As a solution, I am going to use ObjectDB.
I am doing to use two persistence units for each database and migrate objects. Will it work? If not, is there any other recommendation? I tired the web to search, but could not find any totorial explaining how to do it ?
I have searched. I can't find the exact way that matches what I have. I installed Eclipse for Java EE. I then went to help and install new software. Put in the jboss url, downloaded the Hibernate libraries. Everything went fine. I also installed the JDBC driver for MySQL. I tested it. It works. Downloaded and installed slf4j because I read someone that said to (hey, I'm learning).
I started a new Java EE project, and uh, I'm kind of stuck after that. It's a "Hello World" at the moment.
I can't find out what to do. I've seen tutorials where it says create a Hibernate project, but what if I want to add it later after I start a "normal" project? I don't want to manually look for the Hibernate.jar in the download folder. I installed it and want to know how to get to it.
I also saw lots of things that said JPA and Hibernate. Are they the same thing?
EDIT: I was able to find Hibernate by right clicking on the project, new, scroll down to hibernate. I am still interested in JPA and Hibernate.
JPA stands for "Java Persistence API", and it is a specification. It basically defines the APIs and behaviors of a persistence layer, and there are different implementations of the JPA specification. Hibernate is one of these implementations. There are a few others, e.g.:
http://www.oracle.com/technetwork/middleware/toplink/overview/index.html
http://openjpa.apache.org/
The JPA specification can be found here:
http://jcp.org/aboutJava/communityprocess/final/jsr317/index.html
I"m trying to create a Java EE project using a mongo database. I am unable to find any good working examples.How do you correctly set up JPA for the project?
Java EE 6 (or in JPA 2.0 as an part of it) does not have any defined support for MongoDB or for NoSQL databases in general.
That's why how it is done depends fully from JPA provider implementation. If you use EclipseLink, maybe you can try to follow example given in this blog post and present further questions about what exactly is not working.
Hey you should at least check out Arun Gupta's blog post on this at https://blogs.oracle.com/arungupta/entry/java_ee_6_and_nosql. Gupta is the Oracle Java EE Evangelist and this entry covers using EclipseLink for a JPA connection to MongoDB and deploying to Glassfish. If you search his blog, there is also an earlier entry on how to use the Java driver included with MongoDB in a Java EE project. I haven't tried the example with an EntityManager but am thinking about doing so.
I am trying to add Eclipse Dali JPA integration and to specify Hibernate as the JPA implementation. I have gathered different instructions but am struggling with specifying the user library when configuring the project facet. The page here (http://docs.redhat.com/docs/en-US/JBoss_Developer_Studio/4.0/html/Hibernate_Tools_Reference_Guide/dali_integration.html) shows an option that says Library Provided by Target Runtime but I don't have this option. I have User Library and Disable Library Configuration. I'd rather not download the hibernate jars and store them separately for eclipse configuration when I already have them specified in the project with maven. And the disable option leaves the configuration in error.
Anyone have any tips for getting that option or another suggested Hibernate/JPA configuration within Eclipse?
Thanks all.
If you are already doing library management with Maven and m2e, you should select Disable Library Configuration option. Yours is exactly the scenario that option was intended for. If you specify the errors you get when you follow this approach, someone may be able to help find the complete solution.
Alternatively, follow the User Library option and create a user library using the Hibernate jars you already have locally. There is no need to re-download them.
I have a running dynamic web project in Eclipse (Java EE + Maven + Spring). I am at the point where I need to integrate a persistence layer and want to use Hibernate with a MySql database.
I am wondering what plugins would be useful for me at this point? For Hibernate should I install hibernate tools or is it not necessary? Are then any plugins that are most widely use for connecting / exploring database connections that would be appropriate for the type of project I am working on? Thanks.
Hibernate Tools is definitely a nice plugin (that provides wizards, a nice console useful to setup the HQL queries, a mapping editor, etc). I'm actually tempted to say: why not using it? I use it in conjunction with the database support provided by the Eclipse Data Tools Platform (that is included in the Eclipse IDE for Java EE Developers or available via the update manager). In your case, I would maybe just consider using SpringSource Tools Suite as base instead of a vanilla Eclipse.
Update: As reminded by BalusC in a comment, the Hibernate Tools also include a database reverse engineering tool which is maybe the most powerful feature. I should have mentioned it, this is now fixed.
You can look at http://fast-code.sourceforge.net/ as well. You can create FooService and FooServiceImpl and the configurations just by typing foo. It has nice way to create unit tests as well.