Examples with Label org.neo4j.graphdb.Label used on opensource projects

Example 76 with Label

use of org.neo4j.graphdb.Label in project neo4j by neo4j.

the class LabelRecoveryTest method shouldRecoverNodeWithDynamicLabelRecords.

/**
     * Reading a node command might leave a node record which referred to
     * labels in one or more dynamic records as marked as heavy even if that
     * node already had references to dynamic records, changed in a transaction,
     * but had no labels on that node changed within that same transaction.
     * Now defensively only marks as heavy if there were one or more dynamic
     * records provided when providing the record object with the label field
     * value. This would give the opportunity to load the dynamic records the
     * next time that record would be ensured heavy.
     */
@Test
public void shouldRecoverNodeWithDynamicLabelRecords() throws Exception {
    // GIVEN
    database = new TestGraphDatabaseFactory().setFileSystem(fs).newImpermanentDatabase();
    Node node;
    Label[] labels = new Label[] { label("a"), label("b"), label("c"), label("d"), label("e"), label("f"), label("g"), label("h"), label("i"), label("j"), label("k") };
    try (Transaction tx = database.beginTx()) {
        node = database.createNode(labels);
        tx.success();
    }
    // WHEN
    try (Transaction tx = database.beginTx()) {
        node.setProperty("prop", "value");
        tx.success();
    }
    EphemeralFileSystemAbstraction snapshot = fs.snapshot();
    database.shutdown();
    database = new TestGraphDatabaseFactory().setFileSystem(snapshot).newImpermanentDatabase();
    // THEN
    try (Transaction ignored = database.beginTx()) {
        node = database.getNodeById(node.getId());
        for (Label label : labels) {
            assertTrue(node.hasLabel(label));
        }
    }
}

Example 77 with Label

use of org.neo4j.graphdb.Label in project neo4j by neo4j.

the class RelationshipProxyTest method createDropRelationshipLongArrayProperty.

@Test
public void createDropRelationshipLongArrayProperty() {
    Label markerLabel = DynamicLabel.label("marker");
    String testPropertyKey = "testProperty";
    byte[] propertyValue = RandomUtils.nextBytes(1024);
    try (Transaction tx = db.beginTx()) {
        Node start = db.createNode(markerLabel);
        Node end = db.createNode(markerLabel);
        Relationship relationship = start.createRelationshipTo(end, withName("type"));
        relationship.setProperty(testPropertyKey, propertyValue);
        tx.success();
    }
    try (Transaction tx = db.beginTx()) {
        Relationship relationship = db.getRelationshipById(0);
        assertArrayEquals(propertyValue, (byte[]) relationship.getProperty(testPropertyKey));
        tx.success();
    }
    try (Transaction tx = db.beginTx()) {
        Relationship relationship = db.getRelationshipById(0);
        relationship.removeProperty(testPropertyKey);
        tx.success();
    }
    try (Transaction tx = db.beginTx()) {
        Relationship relationship = db.getRelationshipById(0);
        assertFalse(relationship.hasProperty(testPropertyKey));
        tx.success();
    }
}

Example 78 with Label

use of org.neo4j.graphdb.Label in project neo4j by neo4j.

the class TestConcurrentIteratorModification method shouldNotThrowConcurrentModificationExceptionWhenUpdatingWhileIterating.

@Test
public void shouldNotThrowConcurrentModificationExceptionWhenUpdatingWhileIterating() {
    // given
    GraphDatabaseService graph = dbRule.getGraphDatabaseAPI();
    Label label = Label.label("Bird");
    Node node1, node2, node3;
    try (Transaction tx = graph.beginTx()) {
        node1 = graph.createNode(label);
        node2 = graph.createNode(label);
        tx.success();
    }
    // when
    Set<Node> result = new HashSet<>();
    try (Transaction tx = graph.beginTx()) {
        node3 = graph.createNode(label);
        ResourceIterator<Node> iterator = graph.findNodes(label);
        node3.removeLabel(label);
        graph.createNode(label);
        while (iterator.hasNext()) {
            result.add(iterator.next());
        }
        tx.success();
    }
    // then does not throw and retains view from iterator creation time
    assertEquals(asSet(node1, node2), result);
}

Example 79 with Label

use of org.neo4j.graphdb.Label in project neo4j by neo4j.

the class NodeProxyTest method createDropNodeLongStringProperty.

@Test
public void createDropNodeLongStringProperty() {
    Label markerLabel = Label.label("marker");
    String testPropertyKey = "testProperty";
    String propertyValue = RandomStringUtils.randomAscii(255);
    try (Transaction tx = db.beginTx()) {
        Node node = db.createNode(markerLabel);
        node.setProperty(testPropertyKey, propertyValue);
        tx.success();
    }
    try (Transaction tx = db.beginTx()) {
        Node node = Iterators.single(db.findNodes(markerLabel));
        assertEquals(propertyValue, node.getProperty(testPropertyKey));
        tx.success();
    }
    try (Transaction tx = db.beginTx()) {
        Node node = Iterators.single(db.findNodes(markerLabel));
        node.removeProperty(testPropertyKey);
        tx.success();
    }
    try (Transaction tx = db.beginTx()) {
        Node node = Iterators.single(db.findNodes(markerLabel));
        assertFalse(node.hasProperty(testPropertyKey));
        tx.success();
    }
}

Example 80 with Label

use of org.neo4j.graphdb.Label in project neo4j by neo4j.

the class TestTransactionEvents method nodeCanBecomeSchemaIndexableInBeforeCommitByAddingProperty.

@Test
public void nodeCanBecomeSchemaIndexableInBeforeCommitByAddingProperty() throws Exception {
    // Given we have a schema index...
    GraphDatabaseService db = dbRule.getGraphDatabaseAPI();
    Label label = label("Label");
    IndexDefinition index;
    try (Transaction tx = db.beginTx()) {
        index = db.schema().indexFor(label).on("indexed").create();
        tx.success();
    }
    // ... and a transaction event handler that likes to add the indexed property on nodes
    db.registerTransactionEventHandler(new TransactionEventHandler.Adapter<Object>() {

        @Override
        public Object beforeCommit(TransactionData data) throws Exception {
            Iterator<Node> nodes = data.createdNodes().iterator();
            if (nodes.hasNext()) {
                Node node = nodes.next();
                node.setProperty("indexed", "value");
            }
            return null;
        }
    });
    // When we create a node with the right label, but not the right property...
    try (Transaction tx = db.beginTx()) {
        db.schema().awaitIndexesOnline(10, TimeUnit.SECONDS);
        Node node = db.createNode(label);
        node.setProperty("random", 42);
        tx.success();
    }
    // Then we should be able to look it up through the index.
    try (Transaction ignore = db.beginTx()) {
        Node node = db.findNode(label, "indexed", "value");
        assertThat(node.getProperty("random"), is((Object) 42));
    }
}