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

Example 6 with CursorFactory

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

the class ParallelRelationshipCursorTransactionStateTestBase method shouldScanAllRelationshipsFromMultipleThreads.

@Test
void shouldScanAllRelationshipsFromMultipleThreads() throws InterruptedException, ExecutionException, KernelException {
    // 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();
        int type = tx.tokenWrite().relationshipTypeGetOrCreateForName("R");
        for (int i = 0; i < size; i++) {
            ids.add(write.relationshipCreate(write.nodeCreate(), type, write.nodeCreate()));
        }
        org.neo4j.internal.kernel.api.Read read = tx.dataRead();
        Scan<RelationshipScanCursor> scan = read.allRelationshipsScan();
        // when
        Future<LongList> future1 = service.submit(singleBatchWorker(scan, () -> cursors.allocateRelationshipScanCursor(NULL), REL_GET, size / 4));
        Future<LongList> future2 = service.submit(singleBatchWorker(scan, () -> cursors.allocateRelationshipScanCursor(NULL), REL_GET, size / 4));
        Future<LongList> future3 = service.submit(singleBatchWorker(scan, () -> cursors.allocateRelationshipScanCursor(NULL), REL_GET, size / 4));
        Future<LongList> future4 = service.submit(singleBatchWorker(scan, () -> cursors.allocateRelationshipScanCursor(NULL), REL_GET, 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 7 with CursorFactory

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

the class ParallelRelationshipCursorTransactionStateTestBase method shouldScanAllRelationshipFromRandomlySizedWorkers.

@Test
void shouldScanAllRelationshipFromRandomlySizedWorkers() throws InterruptedException, KernelException {
    // given
    ExecutorService service = Executors.newFixedThreadPool(4);
    int size = 128;
    LongArrayList ids = new LongArrayList();
    try (KernelTransaction tx = beginTransaction()) {
        Write write = tx.dataWrite();
        int type = tx.tokenWrite().relationshipTypeGetOrCreateForName("R");
        for (int i = 0; i < size; i++) {
            ids.add(write.relationshipCreate(write.nodeCreate(), type, write.nodeCreate()));
        }
        Read read = tx.dataRead();
        Scan<RelationshipScanCursor> scan = read.allRelationshipsScan();
        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.allocateRelationshipScanCursor(NULL), REL_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 8 with CursorFactory

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

the class ParallelRelationshipCursorTransactionStateTestBase method shouldScanAllRelationshipsFromMultipleThreadWithBigSizeHints.

@Test
void shouldScanAllRelationshipsFromMultipleThreadWithBigSizeHints() throws InterruptedException, ExecutionException, KernelException {
    // 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();
        int type = tx.tokenWrite().relationshipTypeGetOrCreateForName("R");
        for (int i = 0; i < size; i++) {
            ids.add(write.relationshipCreate(write.nodeCreate(), type, write.nodeCreate()));
        }
        org.neo4j.internal.kernel.api.Read read = tx.dataRead();
        Scan<RelationshipScanCursor> scan = read.allRelationshipsScan();
        // when
        Supplier<RelationshipScanCursor> allocateCursor = () -> cursors.allocateRelationshipScanCursor(NULL);
        Future<LongList> future1 = service.submit(singleBatchWorker(scan, allocateCursor, REL_GET, 100));
        Future<LongList> future2 = service.submit(singleBatchWorker(scan, allocateCursor, REL_GET, 100));
        Future<LongList> future3 = service.submit(singleBatchWorker(scan, allocateCursor, REL_GET, 100));
        Future<LongList> future4 = service.submit(singleBatchWorker(scan, allocateCursor, REL_GET, 100));
        // 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());
    } finally {
        service.shutdown();
        service.awaitTermination(1, TimeUnit.MINUTES);
    }
}

Example 9 with CursorFactory

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

the class ParallelRelationshipCursorTransactionStateTestBase method parallelTxStateScanStressTest.

@Test
void parallelTxStateScanStressTest() throws InterruptedException, KernelException {
    LongSet existingRelationships = createRelationships(77);
    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 allRels = LongSets.mutable.withAll(existingRelationships);
            try (KernelTransaction tx = beginTransaction()) {
                int relationshipsInTx = random.nextInt(100);
                Write write = tx.dataWrite();
                int type = tx.tokenWrite().relationshipTypeGetOrCreateForName("R");
                for (int j = 0; j < relationshipsInTx; j++) {
                    allRels.add(write.relationshipCreate(write.nodeCreate(), type, write.nodeCreate()));
                }
                Scan<RelationshipScanCursor> scan = tx.dataRead().allRelationshipsScan();
                List<Future<LongList>> futures = new ArrayList<>(workers);
                for (int j = 0; j < workers; j++) {
                    futures.add(threadPool.submit(randomBatchWorker(scan, () -> cursors.allocateRelationshipScanCursor(NULL), REL_GET)));
                }
                List<LongList> lists = futures.stream().map(TestUtils::unsafeGet).collect(Collectors.toList());
                TestUtils.assertDistinct(lists);
                LongList concat = TestUtils.concat(lists);
                assertEquals(allRels, LongSets.immutable.withAll(concat), format("relationships=%d, seen=%d, all=%d", relationshipsInTx, concat.size(), allRels.size()));
                assertEquals(allRels.size(), concat.size(), format("relationships=%d", relationshipsInTx));
                tx.rollback();
            }
        }
    } finally {
        threadPool.shutdown();
        threadPool.awaitTermination(1, TimeUnit.MINUTES);
    }
}

Example 10 with CursorFactory

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

the class ParallelNodeCursorTestBase method shouldScanAllNodesFromMultipleThreads.

@Test
void shouldScanAllNodesFromMultipleThreads() throws InterruptedException, ExecutionException {
    // given
    ExecutorService service = Executors.newFixedThreadPool(4);
    Scan<NodeCursor> scan = read.allNodesScan();
    CursorFactory cursors = testSupport.kernelToTest().cursors();
    try {
        // when
        Future<LongList> future1 = service.submit(singleBatchWorker(scan, () -> cursors.allocateNodeCursor(NULL), NodeCursor::nodeReference, 32));
        Future<LongList> future2 = service.submit(singleBatchWorker(scan, () -> cursors.allocateNodeCursor(NULL), NodeCursor::nodeReference, 32));
        Future<LongList> future3 = service.submit(singleBatchWorker(scan, () -> cursors.allocateNodeCursor(NULL), NodeCursor::nodeReference, 32));
        Future<LongList> future4 = service.submit(singleBatchWorker(scan, () -> cursors.allocateNodeCursor(NULL), NodeCursor::nodeReference, 32));
        // 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).toSortedList();
        assertEquals(NODE_IDS, concat);
    } finally {
        service.shutdown();
        service.awaitTermination(1, TimeUnit.MINUTES);
    }
}