Good news everyone, A request that's often come up on the mailing list is a mechanism for automatically indexing properties of nodes and relationships.
As of today's SNAPSHOT, auto-indexing is part of Neo4j which means nodes and relationships can now be indexed based on convention, requiring far less effort and code from the developer's point of view. Getting hold of an automatic index is straightforward: AutoIndexer<Node> nodeAutoIndexer = graphDb.index().getNodeAutoIndexer(); AutoIndex<Node> nodeAutoIndex = nodeAutoIndexer.getAutoIndex(); Once you've got an instance of AutoIndex, you can use it as a read-only Index<Node>. The AutoIndexer interface also supports runtime changes and enabling/disabling the auto indexing functionality. To support the new features, there are new Config options you can pass to the startup configuration map in EmbeddedGraphDatabase, the most important of which are: Config.NODE_AUTO_INDEXING (defaults to "false") Config.RELATIONSHIP_AUTO_INDEXING (defaults to "false") If set to "true" (independently of each other) these properties will enable auto indexing functionality and at the successful finish() of each transaction, all newly added properties on the primitives for which auto indexing is enabled will be added to a special AutoIndex (and deleted or changed properties will be updated accordingly too). There are options for fine grained control to determine properties are indexed, default behaviors and so forth. For example, by default all properties are indexed. If you want only properties "name" and "age" for Nodes and "since" and "until" for Relationships to be auto indexed, simply set the initial configuration as follows: Config.NODE_KEYS_INDEXABLE = "name, age"; Config.RELATIONSHIP_KEYS_INDEXABLE="since, until"; For the semantics of the auto-indexing operations, constraints and more detailed examples, see the documentation available at http://docs.neo4j.org/chunked/1.4-SNAPSHOT/auto-indexing.html We're pretty excited about this feature since we think it'll make your lives as developers much more productive in a range of use-cases. If you're comfortable with using SNAPSHOT versions of Neo4j, please try it out and let us know what you think - we'd really value your feedback. If you're happier with using packaged milestones then this feature will be available from 1.4 M05 in a couple of weeks from now. _______________________________________________ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
