| /** |
| * Copyright (C) 2009 Google 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.google.inject; |
| |
| import static com.google.inject.Asserts.assertContains; |
| import com.google.inject.internal.ImmutableList; |
| import com.google.inject.internal.Lists; |
| import com.google.inject.matcher.Matcher; |
| import com.google.inject.matcher.Matchers; |
| import static com.google.inject.matcher.Matchers.any; |
| import static com.google.inject.matcher.Matchers.only; |
| import com.google.inject.spi.InjectionListener; |
| import com.google.inject.spi.TypeEncounter; |
| import com.google.inject.spi.TypeListener; |
| import java.util.List; |
| import java.util.concurrent.atomic.AtomicInteger; |
| import java.util.concurrent.atomic.AtomicReference; |
| import junit.framework.TestCase; |
| import org.aopalliance.intercept.MethodInterceptor; |
| import org.aopalliance.intercept.MethodInvocation; |
| |
| /** |
| * @author jessewilson@google.com (Jesse Wilson) |
| */ |
| public class InjectableTypeListenerTest extends TestCase { |
| |
| private final Matcher<Object> onlyAbc = Matchers.only(new TypeLiteral<A>() {}) |
| .or(only(new TypeLiteral<B>() {})) |
| .or(only(new TypeLiteral<C>() {})); |
| |
| private static MethodInterceptor prefixInterceptor(final String prefix) { |
| return new MethodInterceptor() { |
| public Object invoke(MethodInvocation methodInvocation) throws Throwable { |
| return prefix + methodInvocation.proceed(); |
| } |
| }; |
| } |
| |
| final TypeListener failingInjectableTypeListener = new TypeListener() { |
| int failures = 0; |
| |
| public <I> void hear(TypeLiteral<I> type, TypeEncounter<I> encounter) { |
| throw new ClassCastException("whoops, failure #" + (++failures)); |
| } |
| |
| @Override public String toString() { |
| return "clumsy"; |
| } |
| }; |
| |
| final InjectionListener<Object> failingInjectionListener = new InjectionListener<Object>() { |
| int failures = 0; |
| |
| public void afterInjection(Object injectee) { |
| throw new ClassCastException("whoops, failure #" + (++failures)); |
| } |
| |
| @Override public String toString() { |
| return "goofy"; |
| } |
| }; |
| |
| public void testTypeListenersAreFired() throws NoSuchMethodException { |
| final AtomicInteger firedCount = new AtomicInteger(); |
| |
| final TypeListener typeListener = new TypeListener() { |
| public <I> void hear(TypeLiteral<I> type, TypeEncounter<I> encounter) { |
| assertEquals(new TypeLiteral<A>() {}, type); |
| firedCount.incrementAndGet(); |
| } |
| }; |
| |
| Guice.createInjector(new AbstractModule() { |
| protected void configure() { |
| bindListener(onlyAbc, typeListener); |
| bind(A.class); |
| } |
| }); |
| |
| assertEquals(1, firedCount.get()); |
| } |
| |
| public void testInstallingInjectionListener() { |
| final List<Object> injectees = Lists.newArrayList(); |
| final InjectionListener<Object> injectionListener = new InjectionListener<Object>() { |
| public void afterInjection(Object injectee) { |
| injectees.add(injectee); |
| } |
| }; |
| |
| Injector injector = Guice.createInjector(new AbstractModule() { |
| protected void configure() { |
| bindListener(onlyAbc, new TypeListener() { |
| public <I> void hear(TypeLiteral<I> type, TypeEncounter<I> encounter) { |
| encounter.register(injectionListener); |
| } |
| }); |
| bind(A.class); |
| } |
| }); |
| |
| assertEquals(ImmutableList.of(), injectees); |
| |
| Object a1 = injector.getInstance(A.class); |
| assertEquals(ImmutableList.of(a1), injectees); |
| |
| Object a2 = injector.getInstance(A.class); |
| assertEquals(ImmutableList.of(a1, a2), injectees); |
| |
| Object b1 = injector.getInstance(B.class); |
| assertEquals(ImmutableList.of(a1, a2, b1), injectees); |
| |
| Provider<A> aProvider = injector.getProvider(A.class); |
| assertEquals(ImmutableList.of(a1, a2, b1), injectees); |
| A a3 = aProvider.get(); |
| A a4 = aProvider.get(); |
| assertEquals(ImmutableList.of(a1, a2, b1, a3, a4), injectees); |
| } |
| |
| public void testAddingInterceptors() throws NoSuchMethodException { |
| final Matcher<Object> buzz = only(C.class.getMethod("buzz")); |
| |
| Injector injector = Guice.createInjector(new AbstractModule() { |
| protected void configure() { |
| bindInterceptor(any(), buzz, prefixInterceptor("ka")); |
| bindInterceptor(any(), any(), prefixInterceptor("fe")); |
| |
| bindListener(onlyAbc, new TypeListener() { |
| public <I> void hear(TypeLiteral<I> type, TypeEncounter<I> encounter) { |
| encounter.bindInterceptor(any(), prefixInterceptor("li")); |
| encounter.bindInterceptor(buzz, prefixInterceptor("no")); |
| } |
| }); |
| } |
| }); |
| |
| // interceptors must be invoked in the order they're bound. |
| C c = injector.getInstance(C.class); |
| assertEquals("kafelinobuzz", c.buzz()); |
| assertEquals("felibeep", c.beep()); |
| } |
| |
| public void testInjectableTypeListenerThrows() { |
| try { |
| Guice.createInjector(new AbstractModule() { |
| protected void configure() { |
| bindListener(onlyAbc, failingInjectableTypeListener); |
| bind(B.class); |
| bind(C.class); |
| } |
| }); |
| fail(); |
| } catch (CreationException expected) { |
| assertContains(expected.getMessage(), |
| "1) Error notifying TypeListener clumsy (bound at " + getClass().getName(), |
| ".configure(InjectableTypeListenerTest.java:", |
| "of " + B.class.getName(), |
| "Reason: java.lang.ClassCastException: whoops, failure #1", |
| "2) Error notifying TypeListener clumsy (bound at " + getClass().getName(), |
| ".configure(InjectableTypeListenerTest.java:", |
| "of " + C.class.getName(), |
| "Reason: java.lang.ClassCastException: whoops, failure #2"); |
| } |
| |
| Injector injector = Guice.createInjector(new AbstractModule() { |
| protected void configure() { |
| bindListener(onlyAbc, failingInjectableTypeListener); |
| } |
| }); |
| try { |
| injector.getProvider(B.class); |
| fail(); |
| } catch (ConfigurationException expected) { |
| assertContains(expected.getMessage(), |
| "1) Error notifying TypeListener clumsy (bound at " + getClass().getName(), |
| ".configure(InjectableTypeListenerTest.java:", |
| "of " + B.class.getName(), |
| "Reason: java.lang.ClassCastException: whoops, failure #3"); |
| } |
| |
| // getting it again should yield the same exception #3 |
| try { |
| injector.getInstance(B.class); |
| fail(); |
| } catch (ConfigurationException expected) { |
| assertContains(expected.getMessage(), |
| "1) Error notifying TypeListener clumsy (bound at " + getClass().getName(), |
| ".configure(InjectableTypeListenerTest.java:", |
| "of " + B.class.getName(), |
| "Reason: java.lang.ClassCastException: whoops, failure #3"); |
| } |
| |
| // non-constructed types do not participate |
| assertSame(Stage.DEVELOPMENT, injector.getInstance(Stage.class)); |
| } |
| |
| public void testInjectionListenerThrows() { |
| Injector injector = Guice.createInjector(new AbstractModule() { |
| protected void configure() { |
| bindListener(onlyAbc, new TypeListener() { |
| public <I> void hear(TypeLiteral<I> type, TypeEncounter<I> encounter) { |
| encounter.register(failingInjectionListener); |
| } |
| }); |
| bind(B.class); |
| } |
| }); |
| |
| try { |
| injector.getInstance(A.class); |
| fail(); |
| } catch (ProvisionException e) { |
| assertContains(e.getMessage(), |
| "1) Error notifying InjectionListener goofy of " + A.class.getName(), |
| " Reason: java.lang.ClassCastException: whoops, failure #1"); |
| } |
| |
| // second time through should be a new cause (#2) |
| try { |
| injector.getInstance(A.class); |
| fail(); |
| } catch (ProvisionException e) { |
| assertContains(e.getMessage(), |
| "1) Error notifying InjectionListener goofy of " + A.class.getName(), |
| " Reason: java.lang.ClassCastException: whoops, failure #2"); |
| } |
| |
| // we should get errors for all types, but only on getInstance() |
| Provider<B> bProvider = injector.getProvider(B.class); |
| try { |
| bProvider.get(); |
| fail(); |
| } catch (ProvisionException e) { |
| assertContains(e.getMessage(), |
| "1) Error notifying InjectionListener goofy of " + B.class.getName(), |
| " Reason: java.lang.ClassCastException: whoops, failure #3"); |
| } |
| |
| // non-constructed types do not participate |
| assertSame(Stage.DEVELOPMENT, injector.getInstance(Stage.class)); |
| } |
| |
| public void testInjectMembersInjectableTypeListenerFails() { |
| try { |
| Guice.createInjector(new AbstractModule() { |
| protected void configure() { |
| getMembersInjector(A.class); |
| bindListener(onlyAbc, failingInjectableTypeListener); |
| } |
| }); |
| fail(); |
| } catch (CreationException expected) { |
| assertContains(expected.getMessage(), |
| "1) Error notifying TypeListener clumsy (bound at ", |
| InjectableTypeListenerTest.class.getName(), ".configure(InjectableTypeListenerTest.java:", |
| "of " + A.class.getName(), |
| " Reason: java.lang.ClassCastException: whoops, failure #1"); |
| } |
| } |
| |
| public void testConstructedTypeListenerIsTheSameAsMembersInjectorListener() { |
| final AtomicInteger typeEncounters = new AtomicInteger(); |
| final AtomicInteger injections = new AtomicInteger(); |
| |
| final InjectionListener<A> listener = new InjectionListener<A>() { |
| public void afterInjection(A injectee) { |
| injections.incrementAndGet(); |
| assertNotNull(injectee.injector); |
| } |
| }; |
| |
| Injector injector = Guice.createInjector(new AbstractModule() { |
| protected void configure() { |
| bindListener(onlyAbc, new TypeListener() { |
| public <I> void hear(TypeLiteral<I> type, TypeEncounter<I> encounter) { |
| typeEncounters.incrementAndGet(); |
| encounter.register((InjectionListener) listener); |
| } |
| }); |
| |
| bind(A.class); |
| getMembersInjector(A.class); |
| } |
| }); |
| |
| // creating the injector shouldn't trigger injections |
| assertEquals(0, injections.getAndSet(0)); |
| |
| // constructing an A should trigger an injection |
| injector.getInstance(A.class); |
| assertEquals(1, injections.getAndSet(0)); |
| |
| // injecting an A should trigger an injection |
| injector.injectMembers(new A()); |
| assertEquals(1, injections.getAndSet(0)); |
| |
| // getting a provider shouldn't |
| Provider<A> aProvider = injector.getProvider(A.class); |
| MembersInjector<A> aMembersInjector = injector.getMembersInjector(A.class); |
| assertEquals(0, injections.getAndSet(0)); |
| |
| // exercise the provider |
| aProvider.get(); |
| aProvider.get(); |
| assertEquals(2, injections.getAndSet(0)); |
| |
| // exercise the members injector |
| aMembersInjector.injectMembers(new A()); |
| aMembersInjector.injectMembers(new A()); |
| assertEquals(2, injections.getAndSet(0)); |
| |
| // we should only have encountered one type |
| assertEquals(1, typeEncounters.getAndSet(0)); |
| } |
| |
| public void testLookupsAtInjectorCreateTime() { |
| final AtomicReference<Provider<B>> bProviderReference = new AtomicReference<Provider<B>>(); |
| final AtomicReference<MembersInjector<A>> aMembersInjectorReference |
| = new AtomicReference<MembersInjector<A>>(); |
| |
| final InjectionListener<Object> lookupsTester = new InjectionListener<Object>() { |
| public void afterInjection(Object injectee) { |
| assertNotNull(bProviderReference.get().get()); |
| |
| A a = new A(); |
| aMembersInjectorReference.get().injectMembers(a); |
| assertNotNull(a.injector); |
| } |
| }; |
| |
| Guice.createInjector(new AbstractModule() { |
| protected void configure() { |
| bindListener(only(TypeLiteral.get(C.class)), new TypeListener() { |
| public <I> void hear(TypeLiteral<I> type, TypeEncounter<I> encounter) { |
| Provider<B> bProvider = encounter.getProvider(B.class); |
| try { |
| bProvider.get(); |
| fail(); |
| } catch (IllegalStateException expected) { |
| assertEquals("This Provider cannot be used until the Injector has been created.", |
| expected.getMessage()); |
| } |
| bProviderReference.set(bProvider); |
| |
| MembersInjector<A> aMembersInjector = encounter.getMembersInjector(A.class); |
| try { |
| aMembersInjector.injectMembers(new A()); |
| fail(); |
| } catch (IllegalStateException expected) { |
| assertEquals( |
| "This MembersInjector cannot be used until the Injector has been created.", |
| expected.getMessage()); |
| } |
| aMembersInjectorReference.set(aMembersInjector); |
| |
| encounter.register(lookupsTester); |
| } |
| }); |
| |
| // this ensures the type listener fires, and also the afterInjection() listener |
| bind(C.class).asEagerSingleton(); |
| } |
| }); |
| |
| lookupsTester.afterInjection(null); |
| } |
| |
| public void testLookupsPostCreate() { |
| Injector injector = Guice.createInjector(new AbstractModule() { |
| protected void configure() { |
| bindListener(only(TypeLiteral.get(C.class)), new TypeListener() { |
| public <I> void hear(TypeLiteral<I> type, TypeEncounter<I> encounter) { |
| assertNotNull(encounter.getProvider(B.class).get()); |
| |
| A a = new A(); |
| encounter.getMembersInjector(A.class).injectMembers(a); |
| assertNotNull(a.injector); |
| } |
| }); |
| } |
| }); |
| |
| injector.getInstance(C.class); |
| } |
| |
| /** |
| * We had a bug where we weren't notifying of types encountered for member injection when those |
| * types had no members to be injected. Constructed types are always injected because they always |
| * have at least one injection point: the class constructor. |
| */ |
| public void testTypesWithNoInjectableMembersAreNotified() { |
| final AtomicInteger notificationCount = new AtomicInteger(); |
| |
| Guice.createInjector(new AbstractModule() { |
| protected void configure() { |
| bindListener(onlyAbc, new TypeListener() { |
| public <I> void hear(TypeLiteral<I> type, TypeEncounter<I> encounter) { |
| notificationCount.incrementAndGet(); |
| } |
| }); |
| |
| bind(C.class).toInstance(new C()); |
| } |
| }); |
| |
| assertEquals(1, notificationCount.get()); |
| } |
| |
| public void testEncounterCannotBeUsedAfterHearReturns() { |
| final AtomicReference<TypeEncounter<?>> encounterReference = new AtomicReference<TypeEncounter<?>>(); |
| |
| Guice.createInjector(new AbstractModule() { |
| protected void configure() { |
| bindListener(any(), new TypeListener() { |
| public <I> void hear(TypeLiteral<I> type, TypeEncounter<I> encounter) { |
| encounterReference.set(encounter); |
| } |
| }); |
| |
| bind(C.class); |
| } |
| }); |
| TypeEncounter<?> encounter = encounterReference.get(); |
| |
| try { |
| encounter.register(new InjectionListener<Object>() { |
| public void afterInjection(Object injectee) {} |
| }); |
| fail(); |
| } catch (IllegalStateException expected) { |
| } |
| |
| try { |
| encounter.bindInterceptor(any(), new MethodInterceptor() { |
| public Object invoke(MethodInvocation methodInvocation) throws Throwable { |
| return methodInvocation.proceed(); |
| } |
| }); |
| fail(); |
| } catch (IllegalStateException expected) { |
| } |
| |
| try { |
| encounter.addError(new Exception()); |
| fail(); |
| } catch (IllegalStateException expected) { |
| } |
| |
| try { |
| encounter.getMembersInjector(A.class); |
| fail(); |
| } catch (IllegalStateException expected) { |
| } |
| |
| try { |
| encounter.getProvider(B.class); |
| fail(); |
| } catch (IllegalStateException expected) { |
| } |
| } |
| |
| // TODO: recursively accessing a lookup should fail |
| |
| static class A { |
| @Inject Injector injector; |
| @Inject Stage stage; |
| } |
| |
| static class B {} |
| |
| public static class C { |
| public String buzz() { |
| return "buzz"; |
| } |
| |
| public String beep() { |
| return "beep"; |
| } |
| } |
| } |