Examples with CursorFactory org.neo4j.internal.kernel.api.CursorFactory used on opensource projects

Example 21 with CursorFactory

use of org.neo4j.internal.kernel.api.CursorFactory in project neo4j by neo4j.

the class FulltextIndexTransactionState method updateSearcher.

private void updateSearcher(QueryContext context, CursorContext cursorContext, MemoryTracker memoryTracker) throws Exception {
    Read read = context.getRead();
    CursorFactory cursors = context.cursors();
    ReadableTransactionState state = context.getTransactionStateOrNull();
    // Clear this, so we don't filter out entities who have had their changes reversed since last time.
    modifiedEntityIdsInThisTransaction.clear();
    writer.resetWriterState();
    try (NodeCursor nodeCursor = visitingNodes ? cursors.allocateFullAccessNodeCursor(cursorContext) : null;
        RelationshipScanCursor relationshipCursor = visitingNodes ? null : cursors.allocateRelationshipScanCursor(cursorContext);
        PropertyCursor propertyCursor = cursors.allocateFullAccessPropertyCursor(cursorContext, memoryTracker)) {
        state.accept(txStateVisitor.init(read, nodeCursor, relationshipCursor, propertyCursor));
    }
    currentSearcher = writer.getNearRealTimeSearcher();
    toCloseLater.add(currentSearcher);
    lastUpdateRevision = state.getDataRevision();
}

Example 22 with CursorFactory

use of org.neo4j.internal.kernel.api.CursorFactory in project neo4j by neo4j.

the class CachingExpandIntoTest method shouldComputeDegreeWithoutType.

@Test
void shouldComputeDegreeWithoutType() throws Exception {
    // GIVEN
    long node;
    try (KernelTransaction tx = transaction()) {
        Write write = tx.dataWrite();
        node = nodeWithDegree(tx, 42);
        relate(tx, node, "R1", write.nodeCreate());
        relate(tx, node, "R2", write.nodeCreate());
        relate(tx, write.nodeCreate(), "R3", node);
        relate(tx, node, "R4", node);
        tx.commit();
    }
    try (KernelTransaction tx = transaction()) {
        Read read = tx.dataRead();
        CursorFactory cursors = tx.cursors();
        try (NodeCursor nodes = cursors.allocateNodeCursor(tx.cursorContext())) {
            CachingExpandInto expand = new CachingExpandInto(tx.dataRead(), OUTGOING, MEMORY_TRACKER);
            read.singleNode(node, nodes);
            assertThat(nodes.next()).isEqualTo(true);
            assertThat(nodes.supportsFastDegreeLookup()).isEqualTo(true);
            Degrees degrees = nodes.degrees(ALL_RELATIONSHIPS);
            assertThat(degrees.outgoingDegree()).isEqualTo(45);
            assertThat(degrees.incomingDegree()).isEqualTo(2);
            assertThat(degrees.totalDegree()).isEqualTo(46);
        }
    }
}