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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);
    }
}
Also used : StorageReader(org.neo4j.storageengine.api.StorageReader) KernelTransactionImplementation(org.neo4j.kernel.impl.api.KernelTransactionImplementation) InternalTransaction(org.neo4j.kernel.impl.coreapi.InternalTransaction) CountsDelta(org.neo4j.storageengine.api.CountsDelta) TransactionCountingStateVisitor(org.neo4j.storageengine.api.txstate.TransactionCountingStateVisitor)

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();
}
Also used : BeforeEach(org.junit.jupiter.api.BeforeEach) Arrays(java.util.Arrays) Sets.immutable(org.eclipse.collections.api.factory.Sets.immutable) LongSupplier(java.util.function.LongSupplier) DefaultIdController(org.neo4j.internal.id.DefaultIdController) CursorContext(org.neo4j.io.pagecache.context.CursorContext) NORMAL(org.neo4j.kernel.impl.store.record.RecordLoad.NORMAL) Config(org.neo4j.configuration.Config) Value(org.neo4j.values.storable.Value) NullLogProvider(org.neo4j.logging.NullLogProvider) INTERNAL(org.neo4j.storageengine.api.TransactionApplicationMode.INTERNAL) EMPTY_BYTE_ARRAY(org.apache.commons.lang3.ArrayUtils.EMPTY_BYTE_ARRAY) StorageNodeCursor(org.neo4j.storageengine.api.StorageNodeCursor) DEFAULT_DATABASE_NAME(org.neo4j.configuration.GraphDatabaseSettings.DEFAULT_DATABASE_NAME) StorageRelationshipScanCursor(org.neo4j.storageengine.api.StorageRelationshipScanCursor) Duration(java.time.Duration) PageCacheTracer(org.neo4j.io.pagecache.tracing.PageCacheTracer) 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Aggregations

StorageReader (org.neo4j.storageengine.api.StorageReader)12 CommandCreationContext (org.neo4j.storageengine.api.CommandCreationContext)5 TransactionState (org.neo4j.kernel.api.txstate.TransactionState)4 KernelTransactionImplementation (org.neo4j.kernel.impl.api.KernelTransactionImplementation)4 StorageEngine (org.neo4j.storageengine.api.StorageEngine)4 BeforeEach (org.junit.jupiter.api.BeforeEach)3 Dependencies (org.neo4j.collection.Dependencies)3 IndexingService (org.neo4j.kernel.impl.api.index.IndexingService)3 ArrayList (java.util.ArrayList)2 Test (org.junit.jupiter.api.Test)2 CursorContext (org.neo4j.io.pagecache.context.CursorContext)2 ConstraintIndexCreator (org.neo4j.kernel.impl.api.state.ConstraintIndexCreator)2 TxState (org.neo4j.kernel.impl.api.state.TxState)2 StorageCommand (org.neo4j.storageengine.api.StorageCommand)2 TokenHolders (org.neo4j.token.TokenHolders)2 TokenHolder (org.neo4j.token.api.TokenHolder)2 IOException (java.io.IOException)1 ByteBuffer (java.nio.ByteBuffer)1 OpenOption (java.nio.file.OpenOption)1 Path (java.nio.file.Path)1