Is there any way I can generate a database or update its structure with a command line tool using my JPA-annotated project classes? I'm using Hibernate 4.3.7 as a JPA provider and Spring 4.1.2 as general configuration and wiring handler.
You can use this
Or just use <property name="hbm2ddl.auto">update</property> in your config to update automatically on start.
Related
I am trying to set this property (hibernate.id.generator.stored_last_used) in application.properties of a quarkus application. But quarkus is ignoring stating that it a Unrecognized configuration key.
How to set few hibernate properties which are not recognized by quarkus-hibernate-orm extension?
I believe you can use the persistence.xml.
In this Quarkus Hibernate ORM guide - Setting up and configuring Hibernate ORM with a persistence.xml is written:
Alternatively, you can use a META-INF/persistence.xml to set up Hibernate ORM. This is useful for:
when you have relatively complex settings requiring the full flexibility of the configuration
I have built a web application using MVC pattern and Hibernate. I am trying to configure my hibernate to create schemas for my classes by using following property
<property name="hibernate.hbm2ddl.auto">create</property>
But, I found out that this drops the previous existing schema and re-creates schema on each application run. Is there anyway I configure my hibernate to create schemas only on my first application run and for any future application run just update the rows in existing database?
As YomanTaMero mentioned instead of :
<property name="hibernate.hbm2ddl.auto">create</property>
try this:
<property name="hibernate.hbm2ddl.auto">update</property>
Noticed "update" above?
I am using Spring Boot Data JPA for my project and would like to add the Hibernate facet. However, this seems to require the use of hibernate.cfg.xml to use for the path property in the facet to work. This completely defeats the purpose of Spring Boot and the auto configury shenanigans it provides. My workaround is to use the JPA facet with Hibernate as the default provider, but I would like to use the Hibernate facet instead. Any help is appreciated.
In Hibernate, I can use hbm2dll tool to import data files after hibernate generates the schema from my model. This is fine, but I want to load the file with my database schema and make hibernate use that instead of generating one.
Let's say I have some database configured in my hibernate config
<property name="javax.persistence.jdbc.url" value="jdbc:hsqldb:."/>
Now before I run my test I want to load the db with some schema defined in my schema.sql file. And I don't want to use Spring, I know there is support for it there.
I know I could use hibernate.hbm2ddl to generate schema when SessionFactory is created but I'd rather want to load my manually defined schema. Something like <jdbc:embedded-database> from spring-jdbc.
Is there any support for that in Hibernate?
link1 and link2 might help you out.
Also you can set hibernate.hbm2ddl to none, and add your import.sql file in the classpath which will be executed at the server startup.
My current Spring 3.0 project is integrating with Flyway.
Thanks to the google site so there are document I can counting on. But unfortunately there is not much talking about integration with JPA.
So the questions is:
How to integrate Flyway with persistence.xml? And how does it work? Each time JPA provider will auto generate schema update so how we run a script before or after then?
I guess the query by flyway so far does not support HQL and such so is there any sample code then I can go through to know how to integrate the migration event? Design an interceptor or a new aspect?What to do on a domain level?
Any hint is appreciated. Thanks in advance.
Flyway has no support for JPA and Spring. It basically runs your SQL (not HQL) scripts in order and keeps track of them. And does it well. It remains agnostic to how you use your database and how you produce your upgrade scripts.
However, there's hope. Your persistence provider will most likely support updating existing schema (I know hibernate and eclipselink can), running ALTER and CREATE statements on startup. The migration SQL scripts aren't perfect and it won't always work, but it's a good start. Log these scripts, collect into SQL file, clean-up and use as V_*.sql file supplied to Flyway.
UPDATE: although there is no direct support for spring framework, you can easily integrate it with existing Spring application. This approach is proven to work on production and plays nicely:
<bean id="flyway" class="com.googlecode.flyway.core.Flyway" init-method="migrate">
<property name="dataSource" ref="..."/>
...
</bean>
Bonus: it works great with Java configuration (with Scala) as well:
#Bean(initMethod = "migrate")
def flyway() = {
val fly = new Flyway()
fly.setDataSource(dataSource)
fly
}