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

Example 26 with GraphDatabaseService

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

the class ExactDepthPathFinder method instantiateTraverser.

@Override
protected Traverser instantiateTraverser(Node start, Node end) {
    GraphDatabaseService db = start.getGraphDatabase();
    TraversalDescription side = db.traversalDescription().breadthFirst().uniqueness(uniqueness).order(new BranchOrderingPolicy() {

        @Override
        public BranchSelector create(TraversalBranch startSource, PathExpander expander) {
            return new LiteDepthFirstSelector(startSource, startThreshold, expander);
        }
    });
    return db.bidirectionalTraversalDescription().startSide(side.expand(expander).evaluator(toDepth(onDepth / 2))).endSide(side.expand(expander.reverse()).evaluator(toDepth(onDepth - onDepth / 2))).collisionEvaluator(atDepth(onDepth)).traverse(start, end);
}

Example 27 with GraphDatabaseService

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

the class KernelRecoveryTest method shouldHandleWritesProperlyAfterRecovery.

@Test
public void shouldHandleWritesProperlyAfterRecovery() throws Exception {
    // Given
    EphemeralFileSystemAbstraction fs = fsRule.get();
    GraphDatabaseService db = newDB(fs);
    long node1 = createNode(db);
    // And given the power goes out
    EphemeralFileSystemAbstraction crashedFs = fs.snapshot();
    db.shutdown();
    try {
        db = newDB(crashedFs);
        long node2 = createNode(db);
        db.shutdown();
        // Then the logical log should be in sync
        File logFile = new File(storeDir, PhysicalLogFile.DEFAULT_NAME + PhysicalLogFile.DEFAULT_VERSION_SUFFIX + "0");
        assertThat(logEntries(crashedFs, logFile), containsExactly(// Tx before recovery
        startEntry(-1, -1), commandEntry(node1, NodeCommand.class), commandEntry(ReadOperations.ANY_LABEL, NodeCountsCommand.class), commitEntry(2), // Tx after recovery
        startEntry(-1, -1), commandEntry(node2, NodeCommand.class), commandEntry(ReadOperations.ANY_LABEL, NodeCountsCommand.class), commitEntry(3), // checkpoint
        checkPoint(new LogPosition(0, 250))));
    } finally {
        crashedFs.close();
    }
}

Example 28 with GraphDatabaseService

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

the class RecoveryRequiredCheckerTest method createSomeDataAndCrash.

private FileSystemAbstraction createSomeDataAndCrash(File store, EphemeralFileSystemAbstraction fileSystem) throws IOException {
    final GraphDatabaseService db = new TestGraphDatabaseFactory().setFileSystem(fileSystem).newImpermanentDatabase(store);
    try (Transaction tx = db.beginTx()) {
        db.createNode();
        tx.success();
    }
    EphemeralFileSystemAbstraction snapshot = fileSystem.snapshot();
    db.shutdown();
    return snapshot;
}

Example 29 with GraphDatabaseService

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

the class BatchInsertTest method setSingleProperty.

@Test
public void setSingleProperty() throws Exception {
    BatchInserter inserter = newBatchInserter();
    long node = inserter.createNode(null);
    String value = "Something";
    String key = "name";
    inserter.setNodeProperty(node, key, value);
    GraphDatabaseService db = switchToEmbeddedGraphDatabaseService(inserter);
    assertThat(getNodeInTx(node, db), inTx(db, hasProperty(key).withValue(value)));
    db.shutdown();
}

Example 30 with GraphDatabaseService

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

the class BatchInsertTest method switchToEmbeddedGraphDatabaseService.

private GraphDatabaseService switchToEmbeddedGraphDatabaseService(BatchInserter inserter) {
    inserter.shutdown();
    TestGraphDatabaseFactory factory = new TestGraphDatabaseFactory();
    factory.setFileSystem(fileSystemRule.get());
    GraphDatabaseService db = factory.newImpermanentDatabaseBuilder(new File(inserter.getStoreDir())).setConfig(configuration()).newGraphDatabase();
    try (Transaction tx = db.beginTx()) {
        db.schema().awaitIndexesOnline(10, TimeUnit.SECONDS);
        tx.success();
    }
    return db;
}