Aspect Oriented Programming[1] (AOP) lets you decorate classes and methods with extra behavior. Assuming that you're working with Neo4j in an embedded application, you'd use a library like AspectJ [2][3] to add "advice" to the Node.delete (actually the NodeImpl class) to perform your logic before the actual method is called, giving you the opportunity to *not* call the actual method.
Personally, I always find it a bit scary to use AOP, but when it works it seems magical. Cheers, Andreas [1] http://en.wikipedia.org/wiki/Aspect-oriented_programming [2] http://en.wikipedia.org/wiki/AspectJ [3] http://www.eclipse.org/aspectj/ On May 24, 2011, at 12:41 PM, Jose Angel Inda Herrera wrote: > El 5/24/2011 9:12 AM, Andreas Kollegger escribió: >> Hi Jose, >> >> Perhaps the event framework[1] would suit your purpose. The >> TransactionEventHandler [2] includes operations for intercepting a >> transaction before it is committed. >> >> Otherwise, to intercept the Node.delete call itself, you'd have to look into >> using AOP. >> >> Cheers, >> Andreas >> >> [1] http://wiki.neo4j.org/content/Event_framework >> [2] >> http://components.neo4j.org/neo4j/1.4.M02/apidocs/org/neo4j/graphdb/event/TransactionEventHandler.html >> >> On May 24, 2011, at 6:59 AM, Jose Angel Inda Herrera wrote: >> >>> how could include a function in the Node class I check if a node is >>> being removed or not. for example, have an attribute in the class that >>> implements a node when it is created, and when it is called the delete >>> function to change the value attribute and thus can control whether to >>> delete or not. I need help on this >>> _______________________________________________ >>> Neo4j mailing list >>> User@lists.neo4j.org >>> https://lists.neo4j.org/mailman/listinfo/user >> _______________________________________________ >> Neo4j mailing list >> User@lists.neo4j.org >> https://lists.neo4j.org/mailman/listinfo/user > thanks andreas, but you can explain to me that is AOP and how using > thanks and cheers > _______________________________________________ > Neo4j mailing list > User@lists.neo4j.org > https://lists.neo4j.org/mailman/listinfo/user _______________________________________________ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
