| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.jena.tdb2.store; |
| |
| import org.apache.jena.dboe.base.file.Location; |
| import org.apache.jena.query.Dataset; |
| import org.apache.jena.rdf.model.Resource; |
| import org.apache.jena.rdf.model.ResourceFactory; |
| import org.apache.jena.system.Txn; |
| import org.apache.jena.tdb2.TDB2Factory; |
| import org.apache.jena.vocabulary.RDFS; |
| import org.junit.After; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| import static org.junit.Assert.*; |
| |
| public class TestVisibilityOfChanges { |
| private Dataset dataset; |
| |
| @Before |
| public void before() { |
| dataset = TDB2Factory.connectDataset(Location.mem()); |
| } |
| |
| @After |
| public void after() { |
| dataset.close(); |
| } |
| |
| @Test |
| public void visibilityOfNewlyCreatedResources() { |
| Resource resource = ResourceFactory.createResource(); |
| assertFalse(Txn.calculateRead(dataset, () -> dataset.getDefaultModel().containsResource(resource))); |
| Txn.executeWrite(dataset, () -> { |
| dataset.getDefaultModel().add(resource, RDFS.label, "I exist!"); |
| assertTrue(dataset.getDefaultModel().containsResource(resource)); |
| rinseCache(); |
| assertTrue("A newly created resource should be visible within the write transaction", |
| dataset.getDefaultModel().containsResource(resource)); |
| }); |
| assertTrue("A newly created resource should be visible after commit", |
| Txn.calculateRead(dataset, () -> dataset.getDefaultModel().containsResource(resource))); |
| } |
| |
| @Test |
| public void testIsolation() { |
| Resource resource = ResourceFactory.createResource(); |
| Txn.executeWrite(dataset, () -> { |
| assertFalse(dataset.getDefaultModel().containsResource(resource)); |
| dataset.getDefaultModel().add(resource, RDFS.label, "I exist!"); |
| rinseCache(); |
| executeAndWait(() -> Txn.executeRead(dataset, () -> dataset.getDefaultModel().containsResource(resource))); |
| assertTrue("A read transaction should not pollute the nonPresent cache if there's a write transaction", |
| dataset.getDefaultModel().containsResource(resource)); |
| }); |
| } |
| |
| |
| private void rinseCache() { |
| int cacheSize = 2000; |
| for (int i = 0; i < cacheSize; i++) { |
| Resource newResource = ResourceFactory.createResource(); |
| dataset.getDefaultModel().add(newResource, RDFS.label, ""); |
| } |
| } |
| |
| private void executeAndWait(Runnable runnable) { |
| Thread thread = new Thread(runnable); |
| thread.start(); |
| try { |
| thread.join(); |
| } catch (InterruptedException e) { |
| fail(); |
| } |
| } |
| } |