By Anghel Leonard
Hibernate and MongoDB are a strong blend of open resource patience and NoSQL applied sciences for contemporary Java-based company and cloud program builders. Hibernate is the prime open resource Java-based patience, item relational administration engine, lately repositioned as an item grid administration engine. MongoDB is a starting to be, renowned open resource NoSQL framework, in particular renowned between cloud program and large info builders. With those , firm and cloud builders have a "complete out of the field" answer.
Pro Hibernate and MongoDB indicates you ways to take advantage of and combine Hibernate and MongoDB. extra particularly, this publication publications you thru the bootstrap; construction transactions; dealing with queries and question entities; and mappings. Then, this e-book explores the rules and methods for taking those software ideas to the cloud, utilizing the OpenShift Platform as a provider (PaaS) and extra.
during this booklet, you get case stories:
- An firm software utilizing Hibernate and MongoDB. then,
- A cloud software (OpenShip) migrated from the firm software case examine
After analyzing or utilizing this ebook, you return away with the event from case reviews that provide you with attainable frameworks or templates so you might follow on your personal particular software or cloud program construction context.
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Sample text
It also provides the two-phase commit mechanism for simulating transactions over multiple documents. org/manual/tutorial/perform-two-phasecommits/. But both mechanisms omit the most powerful feature of transactional systems—the rollback operation. Thus, if you need transactions, using MongoDB can be a delicate or even inappropriate choice. MongoDB is not an alternative to SQL as a “fashion” choice and should be used only if it satisfies your application needs better than an RDBMS. You should choose MongoDB when your database model doesn’t imply transactions or when you can shape your database model not to need transactions.
The key is just text and the value is the generated number. nextInt(1000)); 53 Chapter 4 ■ Hibernate OGM at Work 5. insert(basicDBObject); Done! Now, put those five steps together. Listing 4-1 shows the result. Listing 4-1. Random; /** * Hello world! getMessage()); } } } 54 Chapter 4 ■ Hibernate OGM at Work Testing Start the MongoDB server as in Chapter 1. Next, since you are in NetBeans (or Eclipse), there’s a Run button that does the magic. ”, everything worked perfectly.
Figure 2-2 shows some identifiers of different Java types and how they look in MongoDB. Figure 2-2. Correspondence between Java-style primary keys and MongoDB identifiers 28 Chapter 2 ■ Hibernate OGM and MongoDB Storing Associations Probably the most powerful feature of relational databases relies on associations. Any database of any meaningful capability take advantages of associations: one-to-one, one-to-many, many-to-one, and many-to-many. In the relational model, associations require storing additional information, known as navigation information for associations.