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- /*
- * Copyright 2011 James Moger.
- *
- * Licensed 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 com.iciql.test;
-
- import static org.junit.Assert.assertEquals;
- import static org.junit.Assert.assertTrue;
-
- import java.util.List;
- import java.util.concurrent.atomic.AtomicInteger;
-
- import org.junit.After;
- import org.junit.Before;
- import org.junit.Test;
-
- import com.iciql.Db;
- import com.iciql.Query;
- import com.iciql.test.models.Product;
- import com.iciql.util.Utils;
-
- /**
- * Tests concurrency and alias instance sharing.
- */
- public class ConcurrencyTest {
-
- private Db db;
- private int numberOfTests = 200;
-
- @Before
- public void setUp() {
- db = Db.open("jdbc:h2:mem:", "sa", "sa");
- db.insertAll(Product.getList());
- }
-
- @After
- public void tearDown() {
- db.close();
- }
-
- @Test
- public void testAliasSharing() throws Exception {
- // Single-threaded example of why aliases can NOT be shared.
- Product p = new Product();
- Query<Product> query1 = db.from(p);
- Query<Product> query2 = db.from(p);
-
- // if you could share alias instances both counts should be equal
- long count1 = query1.where(p.category).is("Beverages").selectCount();
- long count2 = query2.where(p.category).is("Beverages").selectCount();
-
- // but they aren't
- assertEquals(0, count1);
- assertEquals(2, count2);
- assertTrue(count1 != count2);
- }
-
- @Test
- public void testConcurrencyFinal() throws Exception {
- // Multi-threaded example of why aliases can NOT be shared.
- //
- // This test looks like it _could_ work and you may find that it _can_
- // work, but you should also find that it _will_ fail.
-
- List<Thread> threads = Utils.newArrayList();
- final AtomicInteger failures = new AtomicInteger(0);
- final Product p = new Product();
- for (int i = 0; i < numberOfTests; i++) {
- final int testNumber = i;
- Thread t = new Thread(new Runnable() {
- public void run() {
- try {
- int testCase = testNumber % 10;
- test(testCase, p);
- } catch (Throwable rex) {
- failures.incrementAndGet();
- System.err.println("EXPECTED ERROR");
- rex.printStackTrace();
- }
- }
- }, "ICIQL-" + i);
- t.start();
- threads.add(t);
- }
-
- // wait till all threads complete
- for (Thread t : threads) {
- t.join();
- }
-
- assertTrue("This should fail. Try running a few more times.", failures.get() > 0);
- }
-
- @Test
- public void testConcurrencyThreadLocal() throws Exception {
- List<Thread> threads = Utils.newArrayList();
- final AtomicInteger failures = new AtomicInteger(0);
- final ThreadLocal<Product> tl = Utils.newThreadLocal(Product.class);
- for (int i = 0; i < numberOfTests; i++) {
- final int testNumber = i;
- Thread t = new Thread(new Runnable() {
- public void run() {
- try {
- int testCase = testNumber % 10;
- test(testCase, tl.get());
- } catch (Throwable rex) {
- failures.incrementAndGet();
- rex.printStackTrace();
- }
- }
- }, "ICIQL-" + i);
- t.start();
- threads.add(t);
- }
-
- // wait till all threads complete
- for (Thread t : threads) {
- t.join();
- }
-
- assertEquals("ThreadLocal should never fail!", 0, failures.get());
- }
-
- private void test(int testCase, Product p) throws AssertionError {
- List<Product> list;
- switch (testCase) {
- case 0:
- list = db.from(p).where(p.productName).is("Chai").select();
- assertEquals(1, list.size());
- assertEquals("Chai", list.get(0).productName);
- break;
- case 1:
- list = db.from(p).where(p.category).is("Condiments").select();
- assertEquals(5, list.size());
- break;
- case 3:
- list = db.from(p).where(p.productName).is("Aniseed Syrup").select();
- assertEquals(1, list.size());
- assertEquals("Aniseed Syrup", list.get(0).productName);
- break;
- case 4:
- list = db.from(p).where(p.productName).like("Chef%").select();
- assertEquals(2, list.size());
- assertTrue(list.get(0).productName.startsWith("Chef"));
- assertTrue(list.get(1).productName.startsWith("Chef"));
- break;
- case 6:
- list = db.from(p).where(p.unitsInStock).exceeds(0).select();
- assertEquals(9, list.size());
- break;
- case 7:
- list = db.from(p).where(p.unitsInStock).is(0).select();
- assertEquals(1, list.size());
- assertEquals("Chef Anton's Gumbo Mix", list.get(0).productName);
- break;
- case 9:
- list = db.from(p).where(p.productId).is(7).select();
- assertEquals(1, list.size());
- assertTrue(7 == list.get(0).productId);
- break;
- default:
- list = db.from(p).select();
- assertEquals(10, list.size());
- }
- }
- }
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