NeoEMF Blueprints connector uses the Tinkergraph representation as its default serialization mechanism.
To enable Neo4j-based storage you need to provide a specific option to the Resource#save() method using the dedicated BlueprintsNeo4jConfig:
resource.save(new BlueprintsNeo4jConfig().asMap());Note that this builder can be used to set Blueprints generic options as well as Neo4j specific options.
Yes, you can save and load a NeoEMF model in your database by specifying its path in the URI used to create a resource:
Resource resource = resourceSet.createResource(<uri_to_my_database>);Please note that your database has to be supported by NeoEMF. Existing non-modeling data (such as your own application data, manually stored information, etc) will not be accessible through the NeoEMF API.
WARNING: Using an existing database with the Blueprints-Neo4j connector will lock the database and reject any new connection. This is caused by the embedded Neo4j instance that allows only one connection per database.
Not for now, the Blueprints-Neo4j connector uses an embedded Neo4j instance to save models that cannot be accessed and set by the client application. Since we received several questions related to this feature we put it on top of our backend integration todo list!
NeoEMF is designed to be compatible with existing generated EMF code.
However, the adapter which is in charge of the transformation from standard EMF objects to NeoEMF objects has not been implemented yet and an UnsupportedOperationException is thrown.
A workaround is to create a new EMF Generator Model using NeoEMF importer and generate the code from it.
The adapter implementation will be part of a next release.
The current version of NeoEMF relies on Guava 15 to be compatible with HBase.
If you use a newer version of Guava in your project you may get NoSuchMethodErrors from NeoEMF or one of its components.
We recommend to downgrade your Guava version if possible.
Note that the next major release of NeoEMF (1.1.0) will not depend on Guava and will be compatible with any Guava version used in your client application.