Examples with Statement org.neo4j.kernel.api.Statement used on opensource projects

Example 61 with Statement

use of org.neo4j.kernel.api.Statement in project neo4j by neo4j.

the class MultiIndexPopulationConcurrentUpdatesIT method launchCustomIndexPopulation.

private void launchCustomIndexPopulation(Map<String, Integer> labelNameIdMap, int propertyId, List<NodeUpdates> updates) throws Exception {
    NeoStores neoStores = getNeoStores();
    LabelScanStore labelScanStore = getLabelScanStore();
    ThreadToStatementContextBridge transactionStatementContextBridge = getTransactionStatementContextBridge();
    try (Transaction transaction = embeddedDatabase.beginTx()) {
        Statement statement = transactionStatementContextBridge.get();
        DynamicIndexStoreView storeView = new DynamicIndexStoreViewWrapper(labelScanStore, LockService.NO_LOCK_SERVICE, neoStores, updates);
        SchemaIndexProviderMap providerMap = new DefaultSchemaIndexProviderMap(getSchemaIndexProvider());
        JobScheduler scheduler = getJobScheduler();
        StatementTokenNameLookup tokenNameLookup = new StatementTokenNameLookup(statement.readOperations());
        indexService = IndexingServiceFactory.createIndexingService(Config.empty(), scheduler, providerMap, storeView, tokenNameLookup, getIndexRules(neoStores), NullLogProvider.getInstance(), IndexingService.NO_MONITOR, () -> {
        });
        indexService.start();
        IndexRule[] rules = createIndexRules(labelNameIdMap, propertyId);
        indexService.createIndexes(rules);
        transaction.success();
    }
}

Example 62 with Statement

use of org.neo4j.kernel.api.Statement in project neo4j by neo4j.

the class MyCoreAPI method makeNode.

public long makeNode(String label) throws ProcedureException {
    long result;
    try (Transaction tx = graph.beginTransaction(KernelTransaction.Type.explicit, AnonymousContext.write())) {
        Statement statement = this.txBridge.get();
        long nodeId = statement.dataWriteOperations().nodeCreate();
        int labelId = statement.tokenWriteOperations().labelGetOrCreateForName(label);
        statement.dataWriteOperations().nodeAddLabel(nodeId, labelId);
        result = nodeId;
        tx.success();
    } catch (Exception e) {
        log.error("Failed to create node: " + e.getMessage());
        throw new ProcedureException(Status.Procedure.ProcedureCallFailed, "Failed to create node: " + e.getMessage(), e);
    }
    return result;
}

Example 63 with Statement

use of org.neo4j.kernel.api.Statement in project neo4j by neo4j.

the class BuiltInProcedures method listConstraints.

@Description("List all constraints in the database.")
@Procedure(name = "db.constraints", mode = READ)
public Stream<ConstraintResult> listConstraints() {
    Statement statement = tx.acquireStatement();
    ReadOperations operations = statement.readOperations();
    TokenNameLookup tokens = new StatementTokenNameLookup(operations);
    return asList(operations.constraintsGetAll()).stream().map((constraint) -> constraint.prettyPrint(tokens)).sorted().map(ConstraintResult::new).onClose(statement::close);
}

Example 64 with Statement

use of org.neo4j.kernel.api.Statement in project neo4j by neo4j.

the class IndexPopulationJobTest method before.

@Before
public void before() throws Exception {
    db = (GraphDatabaseAPI) new TestGraphDatabaseFactory().newImpermanentDatabase();
    kernel = db.getDependencyResolver().resolveDependency(KernelAPI.class);
    stateHolder = new KernelSchemaStateStore(NullLogProvider.getInstance());
    indexStoreView = indexStoreView();
    try (KernelTransaction tx = kernel.newTransaction(KernelTransaction.Type.implicit, AUTH_DISABLED);
        Statement statement = tx.acquireStatement()) {
        labelId = statement.tokenWriteOperations().labelGetOrCreateForName(FIRST.name());
        statement.tokenWriteOperations().labelGetOrCreateForName(SECOND.name());
        tx.success();
    }
}

Example 65 with Statement

use of org.neo4j.kernel.api.Statement in project neo4j by neo4j.

the class IndexRecoveryIT method createSomeBananas.

private Set<IndexEntryUpdate> createSomeBananas(Label label) {
    Set<IndexEntryUpdate> updates = new HashSet<>();
    try (Transaction tx = db.beginTx()) {
        ThreadToStatementContextBridge ctxSupplier = db.getDependencyResolver().resolveDependency(ThreadToStatementContextBridge.class);
        try (Statement statement = ctxSupplier.get()) {
            int labelId = statement.readOperations().labelGetForName(label.name());
            int propertyKeyId = statement.readOperations().propertyKeyGetForName(key);
            LabelSchemaDescriptor schemaDescriptor = SchemaDescriptorFactory.forLabel(labelId, propertyKeyId);
            for (int number : new int[] { 4, 10 }) {
                Node node = db.createNode(label);
                node.setProperty(key, number);
                updates.add(IndexEntryUpdate.add(node.getId(), schemaDescriptor, number));
            }
        }
        tx.success();
        return updates;
    }
}