create unique user in application

[Leonardo de Araujo Domingues]

How best to create profiles with unique id? That is, in one application, 

users with UID's there, they should be treated as a primary key in SQL, 

in short, there may be only one user at UID.

Example:

*Create user:

UID: 1

name: Leonard

email: leo...@mail.com

*Result: OK

*Create user:

UID: 1

name: Bill

email: Bi...@mail.com

*Result: FAILED: User already exists with UID "1"

I'm using the Embedded (neo4j-community - v1.7) in applications Java!

Thanks!

--
Leonardo de Araújo Domingues
Graduando em Sistemas de Informação - UFPB/Campus IV
Laborarório de Aplicação em Vídeo Digital - LAVID/UFPB

[Peter Neubauer]

Leonardo,
for this usecase, there is the UniqueFactory for indexes, see
http://api.neo4j.org/current/org/neo4j/graphdb/index/UniqueFactory.html

which is exposed even through REST, see

http://docs.neo4j.org/chunked/snapshot/rest-api-unique-indexes.html

Is that what you are looking for?

Cheers,

/peter neubauer

G:  neubauer.peter
S:  peter.neubauer
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T:   @peterneubauer

If you can write, you can code - @coderdojomalmo
If you can sketch, you can use a graph database - @neo4j

[Leonardo de Araujo Domingues]

I got using IndexManager (http://api.neo4j.org/current/org/neo4j/graphdb/index/IndexManager.html).

For when the application sends me a UID, just need to verify that the UID already exists in the DBNeo4J,

and if not, will be registered, otherwise I throw an exception.

Anyway, your post will help me a lot because I saw that I need!

Thank you!

2012/5/14 Peter Neubauer <peter.n...@neotechnology.com>

[Michael Hunger]

Please use the UniqueFactory as outlined, it uses the index-manager under the hood but does so in a transactional and atomic safe way.

Michael