Each index supports associating any number of key-value pairs with any number of entities (nodes or relationships), where each association between entity and key-value pair is performed individually. To begin with, let’s add a few nodes to the indexes:
// Actors Node reeves = graphDb.createNode(); reeves.setProperty( "name", "Keanu Reeves" ); actors.add( reeves, "name", reeves.getProperty( "name" ) ); Node bellucci = graphDb.createNode(); bellucci.setProperty( "name", "Monica Bellucci" ); actors.add( bellucci, "name", bellucci.getProperty( "name" ) ); // multiple values for a field, in this case for search only // and not stored as a property. actors.add( bellucci, "name", "La Bellucci" ); // Movies Node theMatrix = graphDb.createNode(); theMatrix.setProperty( "title", "The Matrix" ); theMatrix.setProperty( "year", 1999 ); movies.add( theMatrix, "title", theMatrix.getProperty( "title" ) ); movies.add( theMatrix, "year", theMatrix.getProperty( "year" ) ); Node theMatrixReloaded = graphDb.createNode(); theMatrixReloaded.setProperty( "title", "The Matrix Reloaded" ); theMatrixReloaded.setProperty( "year", 2003 ); movies.add( theMatrixReloaded, "title", theMatrixReloaded.getProperty( "title" ) ); movies.add( theMatrixReloaded, "year", 2003 ); Node malena = graphDb.createNode(); malena.setProperty( "title", "Malèna" ); malena.setProperty( "year", 2000 ); movies.add( malena, "title", malena.getProperty( "title" ) ); movies.add( malena, "year", malena.getProperty( "year" ) );
Note that there can be multiple values associated with the same entity and key.
Next up, we’ll create relationships and index them as well:
// we need a relationship type RelationshipType ACTS_IN = RelationshipType.withName( "ACTS_IN" ); // create relationships Relationship role1 = reeves.createRelationshipTo( theMatrix, ACTS_IN ); role1.setProperty( "name", "Neo" ); roles.add( role1, "name", role1.getProperty( "name" ) ); Relationship role2 = reeves.createRelationshipTo( theMatrixReloaded, ACTS_IN ); role2.setProperty( "name", "Neo" ); roles.add( role2, "name", role2.getProperty( "name" ) ); Relationship role3 = bellucci.createRelationshipTo( theMatrixReloaded, ACTS_IN ); role3.setProperty( "name", "Persephone" ); roles.add( role3, "name", role3.getProperty( "name" ) ); Relationship role4 = bellucci.createRelationshipTo( malena, ACTS_IN ); role4.setProperty( "name", "Malèna Scordia" ); roles.add( role4, "name", role4.getProperty( "name" ) );
After these operations, our example graph looks like this:
Figure 34.1. Movie and Actor Graph
