@Test
public void schema() throws Exception {
try (ODatabaseDocumentTx db = createDatabase()) {
OSchema schema = db.getMetadata().getSchema();
OClass eventData = schema.createClass("EventData");
eventData.createProperty("type", OType.STRING);
eventData.createProperty("timestamp", OType.LONG);
eventData.createProperty("userId", OType.STRING);
eventData.createProperty("sessionId", OType.STRING);
eventData.createProperty("attributes", OType.EMBEDDEDMAP);