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/*
* Copyright 2000-2014 Vaadin Ltd.
*
* 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.vaadin.util;
import static org.junit.Assert.assertNull;
import java.lang.reflect.Field;
import java.util.Map;
import java.util.concurrent.atomic.AtomicBoolean;
import org.easymock.EasyMock;
import org.junit.Assert;
import org.junit.Test;
import com.vaadin.server.VaadinRequest;
import com.vaadin.server.VaadinService;
import com.vaadin.server.VaadinSession;
import com.vaadin.ui.UI;
public class TestCurrentInstance {
@Test
public void testInitiallyCleared() throws Exception {
assertCleared();
}
@Test
public void testClearedAfterRemove() throws Exception {
CurrentInstance.set(TestCurrentInstance.class, this);
Assert.assertEquals(this,
CurrentInstance.get(TestCurrentInstance.class));
CurrentInstance.set(TestCurrentInstance.class, null);
assertCleared();
}
@Test
public void testClearedAfterRemoveInheritable() throws Exception {
CurrentInstance.setInheritable(TestCurrentInstance.class, this);
Assert.assertEquals(this,
CurrentInstance.get(TestCurrentInstance.class));
CurrentInstance.setInheritable(TestCurrentInstance.class, null);
assertCleared();
}
@Test
public void testInheritableThreadLocal() throws Exception {
final AtomicBoolean threadFailed = new AtomicBoolean(true);
CurrentInstance.setInheritable(TestCurrentInstance.class, this);
Assert.assertEquals(this,
CurrentInstance.get(TestCurrentInstance.class));
Thread t = new Thread() {
@Override
public void run() {
Assert.assertEquals(TestCurrentInstance.this,
CurrentInstance.get(TestCurrentInstance.class));
threadFailed.set(false);
}
};
t.start();
CurrentInstance.set(TestCurrentInstance.class, null);
assertCleared();
while (t.isAlive()) {
Thread.sleep(1000);
}
Assert.assertFalse("Thread failed", threadFailed.get());
}
@Test
public void testClearedAfterRemoveInSeparateThread() throws Exception {
final AtomicBoolean threadFailed = new AtomicBoolean(true);
CurrentInstance.setInheritable(TestCurrentInstance.class, this);
Assert.assertEquals(this,
CurrentInstance.get(TestCurrentInstance.class));
Thread t = new Thread() {
@Override
public void run() {
try {
Assert.assertEquals(TestCurrentInstance.this,
CurrentInstance.get(TestCurrentInstance.class));
CurrentInstance.set(TestCurrentInstance.class, null);
assertCleared();
threadFailed.set(false);
} catch (Exception e) {
e.printStackTrace();
}
}
};
t.start();
while (t.isAlive()) {
Thread.sleep(1000);
}
Assert.assertFalse("Thread failed", threadFailed.get());
// Clearing the threadlocal in the thread should not have cleared it
// here
Assert.assertEquals(this,
CurrentInstance.get(TestCurrentInstance.class));
// Clearing the only remaining threadlocal should free all memory
CurrentInstance.set(TestCurrentInstance.class, null);
assertCleared();
}
@Test
public void testClearedWithClearAll() throws Exception {
CurrentInstance.set(TestCurrentInstance.class, this);
Assert.assertEquals(this,
CurrentInstance.get(TestCurrentInstance.class));
CurrentInstance.clearAll();
assertCleared();
}
private void assertCleared() throws SecurityException,
NoSuchFieldException, IllegalAccessException {
Assert.assertNull(getInternalCurrentInstanceVariable().get());
}
private InheritableThreadLocal<Map<Class<?>, CurrentInstance>> getInternalCurrentInstanceVariable()
throws SecurityException, NoSuchFieldException,
IllegalAccessException {
Field f = CurrentInstance.class.getDeclaredField("instances");
f.setAccessible(true);
return (InheritableThreadLocal<Map<Class<?>, CurrentInstance>>) f
.get(null);
}
public void testInheritedClearedAfterRemove() {
}
private static class UIStoredInCurrentInstance extends UI {
@Override
protected void init(VaadinRequest request) {
}
}
private static class SessionStoredInCurrentInstance extends VaadinSession {
public SessionStoredInCurrentInstance(VaadinService service) {
super(service);
}
}
@Test
public void testRestoringNullUIWorks() throws Exception {
// First make sure current instance is empty
CurrentInstance.clearAll();
// Then store a new UI in there
Map<Class<?>, CurrentInstance> old = CurrentInstance
.setCurrent(new UIStoredInCurrentInstance());
// Restore the old values and assert that the UI is null again
CurrentInstance.restoreInstances(old);
assertNull(CurrentInstance.get(UI.class));
}
@Test
public void testRestoringNullSessionWorks() throws Exception {
// First make sure current instance is empty
CurrentInstance.clearAll();
// Then store a new session in there
Map<Class<?>, CurrentInstance> old = CurrentInstance
.setCurrent(new SessionStoredInCurrentInstance(EasyMock
.createNiceMock(VaadinService.class)));
// Restore the old values and assert that the session is null again
CurrentInstance.restoreInstances(old);
assertNull(CurrentInstance.get(VaadinSession.class));
assertNull(CurrentInstance.get(VaadinService.class));
}
}
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