question: private synchronized static Datastore createDatastore ( ) { if ( dataStore == null ) { Morphia m = new Morphia ( ) ; String mongoName = KrakenConfig . getProperty ( "kraken.mongodb.dbname" ) ; dataStore = m . createDatastore ( getMongo ( mongoName ) , mongoName ) ; m . map ( Customer . class ) ; m . map ( Project . class ) ; m . map ( Attribute . class ) ; m . map ( Dimension . class ) ; m . map ( Domain . class ) ; m . map ( ProjectFacetJob . class ) ; m . map ( Metric . class ) ; m . map ( Client . class ) ; m . map ( User . class ) ; m . map ( UserGroup . class ) ; m . map ( ProjectAnalysisJob . class ) ; m . map ( AccessToken . class ) ; m . map ( Relation . class ) ; m . map ( Annotation . class ) ; m . map ( ProjectUser . class ) ; m . map ( State . class ) ; m . map ( Shortcut . class ) ; try { dataStore . ensureIndexes ( ) ; } catch ( Exception e ) { throw new RuntimeException ( e . getMessage ( ) , e ) ; } } return dataStore ; }
target:  Create a single MongoDB Morphia Datastore.