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

Example 16 with CursorFactory

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

the class ParallelNodeCursorTransactionStateTestBase method shouldScanAllNodesFromMultipleThreads.

@Test
void shouldScanAllNodesFromMultipleThreads() throws InterruptedException, ExecutionException, TransactionFailureException, InvalidTransactionTypeKernelException {
    // given
    ExecutorService service = Executors.newFixedThreadPool(4);
    CursorFactory cursors = testSupport.kernelToTest().cursors();
    int size = 128;
    LongArrayList ids = new LongArrayList();
    try (KernelTransaction tx = beginTransaction()) {
        Write write = tx.dataWrite();
        for (int i = 0; i < size; i++) {
            ids.add(write.nodeCreate());
        }
        org.neo4j.internal.kernel.api.Read read = tx.dataRead();
        Scan<NodeCursor> scan = read.allNodesScan();
        // when
        Future<LongList> future1 = service.submit(singleBatchWorker(scan, () -> cursors.allocateNodeCursor(NULL), NodeCursor::nodeReference, size / 4));
        Future<LongList> future2 = service.submit(singleBatchWorker(scan, () -> cursors.allocateNodeCursor(NULL), NodeCursor::nodeReference, size / 4));
        Future<LongList> future3 = service.submit(singleBatchWorker(scan, () -> cursors.allocateNodeCursor(NULL), NodeCursor::nodeReference, size / 4));
        Future<LongList> future4 = service.submit(singleBatchWorker(scan, () -> cursors.allocateNodeCursor(NULL), NodeCursor::nodeReference, size / 4));
        // then
        LongList ids1 = future1.get();
        LongList ids2 = future2.get();
        LongList ids3 = future3.get();
        LongList ids4 = future4.get();
        TestUtils.assertDistinct(ids1, ids2, ids3, ids4);
        LongList concat = TestUtils.concat(ids1, ids2, ids3, ids4);
        assertEquals(ids.toSortedList(), concat.toSortedList());
        tx.rollback();
    } finally {
        service.shutdown();
        service.awaitTermination(1, TimeUnit.MINUTES);
    }
}

Example 17 with CursorFactory

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

the class ParallelNodeCursorTransactionStateTestBase method shouldScanAllNodesFromRandomlySizedWorkers.

@Test
void shouldScanAllNodesFromRandomlySizedWorkers() throws InterruptedException, TransactionFailureException, InvalidTransactionTypeKernelException {
    // given
    ExecutorService service = Executors.newFixedThreadPool(4);
    int size = 128;
    LongArrayList ids = new LongArrayList();
    try (KernelTransaction tx = beginTransaction()) {
        Write write = tx.dataWrite();
        for (int i = 0; i < size; i++) {
            ids.add(write.nodeCreate());
        }
        Read read = tx.dataRead();
        Scan<NodeCursor> scan = read.allNodesScan();
        CursorFactory cursors = testSupport.kernelToTest().cursors();
        // when
        List<Future<LongList>> futures = new ArrayList<>();
        for (int i = 0; i < 10; i++) {
            futures.add(service.submit(randomBatchWorker(scan, () -> cursors.allocateNodeCursor(NULL), NODE_GET)));
        }
        // then
        List<LongList> lists = futures.stream().map(TestUtils::unsafeGet).collect(Collectors.toList());
        TestUtils.assertDistinct(lists);
        LongList concat = TestUtils.concat(lists);
        assertEquals(ids.toSortedList(), concat.toSortedList());
        tx.rollback();
    } finally {
        service.shutdown();
        service.awaitTermination(1, TimeUnit.MINUTES);
    }
}

Example 18 with CursorFactory

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

the class ParallelNodeLabelScanTestBase method shouldScanAllNodesFromMultipleThreads.

@Test
void shouldScanAllNodesFromMultipleThreads() throws InterruptedException, ExecutionException {
    // given
    ExecutorService service = Executors.newFixedThreadPool(4);
    Scan<NodeLabelIndexCursor> scan = read.nodeLabelScan(BAR_LABEL);
    CursorFactory cursors = testSupport.kernelToTest().cursors();
    try {
        // when
        Supplier<NodeLabelIndexCursor> allocateCursor = () -> cursors.allocateNodeLabelIndexCursor(NULL);
        Future<LongList> future1 = service.submit(singleBatchWorker(scan, allocateCursor, NODE_GET, NUMBER_OF_NODES));
        Future<LongList> future2 = service.submit(singleBatchWorker(scan, allocateCursor, NODE_GET, NUMBER_OF_NODES));
        Future<LongList> future3 = service.submit(singleBatchWorker(scan, allocateCursor, NODE_GET, NUMBER_OF_NODES));
        Future<LongList> future4 = service.submit(singleBatchWorker(scan, allocateCursor, NODE_GET, NUMBER_OF_NODES));
        // then
        LongList ids1 = future1.get();
        LongList ids2 = future2.get();
        LongList ids3 = future3.get();
        LongList ids4 = future4.get();
        assertDistinct(ids1, ids2, ids3, ids4);
        assertEquals(BAR_NODES, LongSets.immutable.withAll(concat(ids1, ids2, ids3, ids4)));
    } finally {
        service.shutdown();
        service.awaitTermination(1, TimeUnit.MINUTES);
    }
}

Example 19 with CursorFactory

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

the class ParallelNodeLabelScanTransactionStateTestBase method shouldScanAllNodesFromRandomlySizedWorkers.

@Test
void shouldScanAllNodesFromRandomlySizedWorkers() throws InterruptedException, KernelException {
    // given
    ExecutorService service = Executors.newFixedThreadPool(4);
    int size = 2000;
    try (KernelTransaction tx = beginTransaction()) {
        int label = tx.tokenWrite().labelGetOrCreateForName("L");
        LongList ids = createNodesWithLabel(tx.dataWrite(), label, size);
        Read read = tx.dataRead();
        Scan<NodeLabelIndexCursor> scan = read.nodeLabelScan(label);
        CursorFactory cursors = testSupport.kernelToTest().cursors();
        // when
        List<Future<LongList>> futures = new ArrayList<>();
        for (int i = 0; i < 10; i++) {
            futures.add(service.submit(randomBatchWorker(scan, () -> cursors.allocateNodeLabelIndexCursor(tx.cursorContext()), NODE_GET)));
        }
        // then
        List<LongList> lists = futures.stream().map(TestUtils::unsafeGet).collect(Collectors.toList());
        assertDistinct(lists);
        assertEquals(ids.toSortedList(), concat(lists).toSortedList());
        tx.rollback();
    } finally {
        service.shutdown();
        service.awaitTermination(1, TimeUnit.MINUTES);
    }
}

Example 20 with CursorFactory

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

the class ParallelNodeLabelScanTransactionStateTestBase method parallelTxStateScanStressTest.

@Test
void parallelTxStateScanStressTest() throws KernelException, InterruptedException {
    int label = label("L");
    MutableLongSet existingNodes = LongSets.mutable.withAll(createNodesWithLabel(label, 1000));
    int workers = Runtime.getRuntime().availableProcessors();
    ExecutorService threadPool = Executors.newFixedThreadPool(workers);
    CursorFactory cursors = testSupport.kernelToTest().cursors();
    ThreadLocalRandom random = ThreadLocalRandom.current();
    try {
        for (int i = 0; i < 1000; i++) {
            MutableLongSet allNodes = LongSets.mutable.withAll(existingNodes);
            try (KernelTransaction tx = beginTransaction()) {
                int nodeInTx = random.nextInt(1000);
                allNodes.addAll(createNodesWithLabel(tx.dataWrite(), label, nodeInTx));
                Scan<NodeLabelIndexCursor> scan = tx.dataRead().nodeLabelScan(label);
                List<Future<LongList>> futures = new ArrayList<>(workers);
                for (int j = 0; j < workers; j++) {
                    futures.add(threadPool.submit(randomBatchWorker(scan, () -> cursors.allocateNodeLabelIndexCursor(tx.cursorContext()), NODE_GET)));
                }
                List<LongList> lists = futures.stream().map(TestUtils::unsafeGet).collect(Collectors.toList());
                assertDistinct(lists);
                LongList concat = concat(lists);
                assertEquals(allNodes, LongSets.immutable.withAll(concat), format("nodes=%d, seen=%d, all=%d", nodeInTx, concat.size(), allNodes.size()));
                assertEquals(allNodes.size(), concat.size(), format("nodes=%d", nodeInTx));
                tx.rollback();
            }
        }
    } finally {
        threadPool.shutdown();
        threadPool.awaitTermination(1, TimeUnit.MINUTES);
    }
}