Hibernate with MongoDB

问题:

I'm looking for resources showing how to integrate MongoDB with Hibernate (preferably from within spring) so that I can switch between a RDBMS and a NoSql alternative: does anyone have experience doing this?

回答1:

You can't easily do this. The point of Hibernate is to map Java Objects to a relational database. Although Hibernate abstracts a lot of details away you still need to understand how relational databases work with things such as foreign and primary keys, and the performance implications of queries you run. MongoDB requires an entire different way of designing your database focusing on objects instead of columns and tables. while you may be able to create a Hibernate dialect for MongoDB creating a design that would work on both a relational database and a NoSql database will give you a design that works poorly on both.

回答2:

What about Hibernate OGM? It provides JPA for No-SQL databases.

回答3:

Migration would be easier if you use Spring MongoTemplate (similar to HibernateTemplate).
Among its features is support for JPA annotations (although, I'm not sure to what extent).
See more: http://www.springsource.org/spring-data/mongodb

You'll need the following:

1. Add spring-data-mongodb JAR to your project (available in maven central).
2. Add mongo-java-driver JAR to your project (available in maven central).
3. Use the provided MongoTemplate class in a similar manner to HibernateTemplate. E.g.: mongoTemplate.findById(id, MyClass.class);
mongoTemplate.insert(myObject);

Here's a concrete example with code: use-spring-and-hibernate-with-mongodb

回答4:

There is nice work done earlier as:

• http://pragmaticintegrator.wordpress.com/2011/07/14/use-spring-and-hibernate-with-mongodb/
• http://pragmaticintegrator.wordpress.com/2011/07/27/unit-test-your-springhibernate-and-mongodb-setup/#comments

refer to these links. it will be helpful to you.

回答5:

There is also kundera, which uses JPA-annotations to read/write your object from/to a mongodb. If you ara familiar with hibernate, it should be quite straightformard to use.

I recently tried Morphia, which takes the same approach, but with its own annotations. It works fine

回答6:

May this blog helps: http://drorbr.blogspot.com/2010/02/migrating-springhibernate-application.html Here Dror Bereznitsky describes nicely how to integrate a sping/hibernate based solution with mongodb.

回答7:

For the sake of completeness, PlayORM also supports MongoDB now. PlayORM is an object NoSQL mapping solution so you can write POJO’s and let it deal with all the details of marshalling/unmarshalling to MongoDB. Visit its documentation here

回答8:

Well just to give you an example, I am doing somehting simmilar. In ColdFusion, Hibernate is integrated and in order to save your Hibernate Object, you hvae to do EntitySave(Obj). However what we have done is build the Orm object, and then use a mongoDB Coldfusion component and just save the object by going mongo.Save(obj,collectionName).

回答9:

If you are using Java then you can use Hibernate OGM it provides Java Persistence support for NoSQL databases.

For more details visit http://hibernate.org/ogm/