/*
* Copyright 2013 Netflix, Inc.
*
* 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.netflix.governator.guice.lazy;
import com.google.inject.AbstractModule;
import com.google.inject.Guice;
import com.google.inject.Inject;
import com.google.inject.Injector;
import com.google.inject.Provider;
import com.netflix.governator.LifecycleInjectorBuilderProvider;
import com.netflix.governator.guice.LifecycleInjector;
import com.netflix.governator.guice.LifecycleInjectorBuilder;
import com.netflix.governator.guice.mocks.AnnotatedFineGrainedLazySingletonObject;
import com.netflix.governator.guice.mocks.LazySingletonObject;
import org.testng.Assert;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Test;
import java.util.concurrent.Callable;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.Executors;
public class TestFineGrainedLazySingleton extends LifecycleInjectorBuilderProvider
{
public static class InjectedAnnotatedProvider
{
public final Provider<AnnotatedFineGrainedLazySingletonObject> provider;
@Inject
public InjectedAnnotatedProvider(Provider<AnnotatedFineGrainedLazySingletonObject> provider)
{
this.provider = provider;
}
}
@BeforeMethod
public void setup()
{
AnnotatedFineGrainedLazySingletonObject.constructorCount.set(0);
AnnotatedFineGrainedLazySingletonObject.postConstructCount.set(0);
LazySingletonObject.constructorCount.set(0);
LazySingletonObject.postConstructCount.set(0);
}
@FineGrainedLazySingleton
public static class DeadLockTester
{
@Inject
public DeadLockTester(final Injector injector) throws InterruptedException
{
final CountDownLatch latch = new CountDownLatch(1);
Executors.newSingleThreadExecutor().submit
(
new Callable<Object>()
{
@Override
public Object call() throws Exception
{
injector.getInstance(AnnotatedFineGrainedLazySingletonObject.class);
latch.countDown();
return null;
}
}
);
latch.await();
}
}
@Test
public void testDeadLock() throws InterruptedException
{
AbstractModule module = new AbstractModule()
{
@Override
protected void configure()
{
binder().bindScope(LazySingleton.class, LazySingletonScope.get());
binder().bindScope(FineGrainedLazySingleton.class, FineGrainedLazySingletonScope.get());
}
};
Injector injector = Guice.createInjector(module);
injector.getInstance(DeadLockTester.class); // if FineGrainedLazySingleton is not used, this line will deadlock
Assert.assertEquals(AnnotatedFineGrainedLazySingletonObject.constructorCount.get(), 1);
}
@Test(dataProvider = "builders")
public void testUsingAnnotation(LifecycleInjectorBuilder lifecycleInjectorBuilder)
{
Injector injector = lifecycleInjectorBuilder.createInjector();
Assert.assertEquals(AnnotatedFineGrainedLazySingletonObject.constructorCount.get(), 0);
Assert.assertEquals(AnnotatedFineGrainedLazySingletonObject.postConstructCount.get(), 0);
AnnotatedFineGrainedLazySingletonObject instance = injector.getInstance(AnnotatedFineGrainedLazySingletonObject.class);
Assert.assertEquals(AnnotatedFineGrainedLazySingletonObject.constructorCount.get(), 1);
Assert.assertEquals(AnnotatedFineGrainedLazySingletonObject.postConstructCount.get(), 1);
AnnotatedFineGrainedLazySingletonObject instance2 = injector.getInstance(AnnotatedFineGrainedLazySingletonObject.class);
Assert.assertEquals(AnnotatedFineGrainedLazySingletonObject.constructorCount.get(), 1);
Assert.assertEquals(AnnotatedFineGrainedLazySingletonObject.postConstructCount.get(), 1);
Assert.assertSame(instance, instance2);
}
@Test(dataProvider = "builders")
public void testUsingInWithProviderAndAnnotation(LifecycleInjectorBuilder lifecycleInjectorBuilder)
{
Injector injector = lifecycleInjectorBuilder.createInjector();
Assert.assertEquals(AnnotatedFineGrainedLazySingletonObject.constructorCount.get(), 0);
Assert.assertEquals(AnnotatedFineGrainedLazySingletonObject.postConstructCount.get(), 0);
InjectedAnnotatedProvider injectedProvider = injector.getInstance(InjectedAnnotatedProvider.class);
Assert.assertEquals(AnnotatedFineGrainedLazySingletonObject.constructorCount.get(), 0);
Assert.assertEquals(AnnotatedFineGrainedLazySingletonObject.postConstructCount.get(), 0);
AnnotatedFineGrainedLazySingletonObject instance = injectedProvider.provider.get();
Assert.assertEquals(AnnotatedFineGrainedLazySingletonObject.constructorCount.get(), 1);
Assert.assertEquals(AnnotatedFineGrainedLazySingletonObject.postConstructCount.get(), 1);
AnnotatedFineGrainedLazySingletonObject instance2 = injectedProvider.provider.get();
Assert.assertEquals(AnnotatedFineGrainedLazySingletonObject.constructorCount.get(), 1);
Assert.assertEquals(AnnotatedFineGrainedLazySingletonObject.postConstructCount.get(), 1);
Assert.assertSame(instance, instance2);
}
}