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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.Before;
import org.junit.Ignore;
import org.junit.Test;
import com.iciql.Db;
import com.iciql.IciqlException;
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 int numberOfTests = 800;
@Before
public void setUp() {
Db db = IciqlSuite.openNewDb();
db.insertAll(Product.getList());
}
@Test
public void testAliasSharing() throws Exception {
Db db = IciqlSuite.openCurrentDb();
try {
// 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 = 0;
try {
count1 = query1.where(p.category).is("Beverages").selectCount();
} catch (IciqlException e) {
assertEquals(IciqlException.CODE_UNMAPPED_FIELD, e.getIciqlCode());
}
long count2 = query2.where(p.category).is("Beverages").selectCount();
// but they aren't
assertEquals(0, count1);
assertEquals(2, count2);
assertTrue(count1 != count2);
} finally {
db.close();
}
}
@Test
@Ignore
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 (AssertionError e) {
failures.incrementAndGet();
} catch (IciqlException e) {
failures.incrementAndGet();
if (e.getIciqlCode() != IciqlException.CODE_UNMAPPED_FIELD) {
System.err.println("UNEXPECTED ERROR in testConcurrencyFinal()");
e.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
@Ignore
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 (AssertionError e) {
failures.incrementAndGet();
} catch (IciqlException e) {
failures.incrementAndGet();
if (e.getIciqlCode() != IciqlException.CODE_UNMAPPED_FIELD) {
System.err.println("UNEXPECTED ERROR in testConcurrencyThreadLocal()");
e.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 {
Db db = IciqlSuite.openCurrentDb();
try {
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());
}
} finally {
db.close();
}
}
}
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