Examples with StorageReader org.neo4j.storageengine.api.StorageReader used on opensource projects

Example 11 with StorageReader

use of org.neo4j.storageengine.api.StorageReader in project neo4j by neo4j.

the class TransactionCountingStateVisitorTraceIT method traceStateWithChanges.

private void traceStateWithChanges(Consumer<Transaction> transactionalOperation) throws KernelException {
    try (var transaction = database.beginTx()) {
        var internalTransaction = (InternalTransaction) transaction;
        KernelTransactionImplementation kernelTransaction = (KernelTransactionImplementation) internalTransaction.kernelTransaction();
        var cursorContext = kernelTransaction.cursorContext();
        transactionalOperation.accept(transaction);
        cursorContext.getCursorTracer().reportEvents();
        assertZeroCursor(cursorContext);
        var transactionState = kernelTransaction.txState();
        var counts = new CountsDelta();
        try (StorageReader storageReader = kernelTransaction.newStorageReader();
            var stateVisitor = new TransactionCountingStateVisitor(EMPTY, storageReader, transactionState, counts, cursorContext)) {
            transactionState.accept(stateVisitor);
        }
        assertTwoCursor(cursorContext);
    }
}

Example 12 with StorageReader

use of org.neo4j.storageengine.api.StorageReader in project neo4j by neo4j.

the class NeoStoresTest method reinitializeStores.

private void reinitializeStores(DatabaseLayout databaseLayout) {
    Dependencies dependencies = new Dependencies();
    Config config = Config.defaults(GraphDatabaseSettings.fail_on_missing_files, false);
    dependencies.satisfyDependency(config);
    closeStorageEngine();
    IdGeneratorFactory idGeneratorFactory = new DefaultIdGeneratorFactory(fs, immediate(), databaseLayout.getDatabaseName());
    TokenHolders tokenHolders = new TokenHolders(createReadOnlyTokenHolder(TokenHolder.TYPE_PROPERTY_KEY), createReadOnlyTokenHolder(TokenHolder.TYPE_LABEL), createReadOnlyTokenHolder(TokenHolder.TYPE_RELATIONSHIP_TYPE));
    storageEngine = new RecordStorageEngine(databaseLayout, config, pageCache, fs, nullLogProvider(), tokenHolders, new DatabaseSchemaState(nullLogProvider()), new StandardConstraintRuleAccessor(), i -> i, NO_LOCK_SERVICE, mock(Health.class), idGeneratorFactory, new DefaultIdController(), immediate(), PageCacheTracer.NULL, true, INSTANCE, writable(), CommandLockVerification.Factory.IGNORE, LockVerificationMonitor.Factory.IGNORE);
    life = new LifeSupport();
    life.add(storageEngine);
    life.add(storageEngine.schemaAndTokensLifecycle());
    life.start();
    NeoStores neoStores = storageEngine.testAccessNeoStores();
    pStore = neoStores.getPropertyStore();
    nodeStore = neoStores.getNodeStore();
    storageReader = storageEngine.newReader();
}