Understanding projectTo in SDN

[Stacy Tyler Young]

Inside beforeCommit() of my txn event handler I am setting a field on the node. I need to make that value available in the spring context. I've tried projectTo but not sure I'm understanding its use:

            node.setProperty( "key", "foo" );

            String className = node.getProperty("__type__").toString();

            Class cls = Class.forName( className );

            template.projectTo( node, cls );

[Stacy Tyler Young]

Took a look at the Neo4jEntityPersister source, ok so projectTo is not what I had thought.

Which leads me back to the original question, is it possible to update node properties during a transaction and them reflected back in spring context?

Thanks!

Stace

Should properties set directly on the node inside a txn event handler be visible 

[Michael Hunger]

projectTo creates a new entity instance around your node. If you save it, your change will be persisted. But it is not updated in the original entity instance, b/c there is no local cache.

Would it be possible for this specific use-case to hold your own entity cache? (only of those entity types that are potentially updated) ?

Another possible option is to use template.fetch(entity) after the commit.

HTH,

Michael

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