Morphia : Returning errors

Question

I am using Morphia for MongoDB and was wondering how error handling works in morphia ?

For example, when I am doing a

dao.save(MyEntity)

How do I know for sure that my save was successful ? Is there some kinda exception handling I can do ?

Thank you

Answer 1

On the one had there are exceptions if something goes wrong with the connections. Check the configuration options in https://github.com/mongodb/mongo-java-driver/blob/master/src/main/com/mongodb/MongoClientOptions.java, especially the write concern. Those settings are a trade-off between security and performance (and single instance vs replica set make a difference as well). You'll need to find the best combination for your use case.

On the other hand: If you are doing the initial save (basically an insert and not an update), the server generates and sets the ObjectId. If it is set, the server has saved the document.