ApplicationListener beans get obtained on demand, supporting non-singletons as well; ApplicationListeners will be called in the order according to the Ordered contract; generified ApplicationListener interface
This commit is contained in:
Juergen Hoeller
@@ -1,5 +1,5 @@
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/*
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* Copyright 2002-2007 the original author or authors.
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* Copyright 2002-2009 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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@@ -16,19 +16,16 @@
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package org.springframework.context.event;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.HashSet;
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import java.util.Set;
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import org.aopalliance.intercept.MethodInvocation;
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import org.easymock.EasyMock;
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import static org.easymock.EasyMock.*;
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import static org.junit.Assert.*;
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import org.junit.Test;
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import org.junit.Assert;
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import static org.junit.Assert.assertTrue;
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import org.junit.Test;
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import org.springframework.beans.FatalBeanException;
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import org.springframework.beans.factory.BeanCreationException;
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import org.springframework.beans.factory.BeanCurrentlyInCreationException;
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import org.springframework.beans.factory.config.RuntimeBeanReference;
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import org.springframework.beans.factory.support.RootBeanDefinition;
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import org.springframework.context.ApplicationContext;
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@@ -37,6 +34,7 @@ import org.springframework.context.ApplicationListener;
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import org.springframework.context.BeanThatBroadcasts;
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import org.springframework.context.BeanThatListens;
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import org.springframework.context.support.StaticApplicationContext;
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import org.springframework.core.Ordered;
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/**
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* Unit and integration tests for the ApplicationContext event support.
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@@ -46,70 +44,9 @@ import org.springframework.context.support.StaticApplicationContext;
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*/
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public class ApplicationContextEventTests {
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private AbstractApplicationEventMulticaster getMulticaster() {
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return new AbstractApplicationEventMulticaster() {
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public void multicastEvent(ApplicationEvent event) {
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}
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};
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}
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@Test
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public void multicasterNewCollectionClass() {
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AbstractApplicationEventMulticaster mc = getMulticaster();
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mc.addApplicationListener(new NoOpApplicationListener());
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mc.setCollectionClass(ArrayList.class);
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assertEquals(1, mc.getApplicationListeners().size());
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assertEquals(ArrayList.class, mc.getApplicationListeners().getClass());
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}
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@Test(expected = IllegalArgumentException.class)
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public void multicasterInvalidCollectionClass_NotEvenACollectionType() {
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AbstractApplicationEventMulticaster mc = getMulticaster();
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mc.setCollectionClass(ApplicationContextEventTests.class);
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}
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@Test(expected = FatalBeanException.class)
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public void multicasterInvalidCollectionClass_PassingAnInterfaceNotAConcreteClass() {
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AbstractApplicationEventMulticaster mc = getMulticaster();
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mc.setCollectionClass(List.class);
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}
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@Test(expected = IllegalArgumentException.class)
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public void multicasterNullCollectionClass() {
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AbstractApplicationEventMulticaster mc = getMulticaster();
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mc.setCollectionClass(null);
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}
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@Test
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public void multicasterRemoveAll() {
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AbstractApplicationEventMulticaster mc = getMulticaster();
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mc.addApplicationListener(new NoOpApplicationListener());
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mc.removeAllListeners();
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assertEquals(0, mc.getApplicationListeners().size());
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}
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@Test
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public void multicasterRemoveOne() {
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AbstractApplicationEventMulticaster mc = getMulticaster();
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ApplicationListener one = new NoOpApplicationListener();
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ApplicationListener two = new NoOpApplicationListener();
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mc.addApplicationListener(one);
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mc.addApplicationListener(two);
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mc.removeApplicationListener(one);
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assertEquals(1, mc.getApplicationListeners().size());
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assertTrue("Remaining listener present", mc.getApplicationListeners().contains(two));
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}
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@Test
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public void simpleApplicationEventMulticaster() {
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ApplicationListener listener = EasyMock.createMock(ApplicationListener.class);
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ApplicationEvent evt = new ContextClosedEvent(new StaticApplicationContext());
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listener.onApplicationEvent(evt);
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@@ -117,14 +54,25 @@ public class ApplicationContextEventTests {
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smc.addApplicationListener(listener);
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replay(listener);
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smc.multicastEvent(evt);
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verify(listener);
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}
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@Test
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public void testEvenPublicationInterceptor() throws Throwable {
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public void orderedListeners() {
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MyOrderedListener1 listener1 = new MyOrderedListener1();
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MyOrderedListener2 listener2 = new MyOrderedListener2(listener1);
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SimpleApplicationEventMulticaster smc = new SimpleApplicationEventMulticaster();
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smc.addApplicationListener(listener2);
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smc.addApplicationListener(listener1);
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smc.multicastEvent(new MyEvent(this));
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smc.multicastEvent(new MyOtherEvent(this));
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}
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@Test
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public void testEventPublicationInterceptor() throws Throwable {
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MethodInvocation invocation = EasyMock.createMock(MethodInvocation.class);
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ApplicationContext ctx = EasyMock.createMock(ApplicationContext.class);
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@@ -134,37 +82,15 @@ public class ApplicationContextEventTests {
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interceptor.afterPropertiesSet();
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expect(invocation.proceed()).andReturn(new Object());
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expect(invocation.getThis()).andReturn(new Object());
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ctx.publishEvent(isA(MyEvent.class));
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replay(invocation, ctx);
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interceptor.invoke(invocation);
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verify(invocation, ctx);
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}
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@Test
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public void listenerAndBroadcasterWithUnresolvableCircularReference() {
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StaticApplicationContext context = new StaticApplicationContext();
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context.setDisplayName("listener context");
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context.registerBeanDefinition("broadcaster", new RootBeanDefinition(BeanThatBroadcasts.class));
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RootBeanDefinition listenerDef = new RootBeanDefinition(BeanThatListens.class);
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listenerDef.getConstructorArgumentValues().addGenericArgumentValue(new RuntimeBeanReference("broadcaster"));
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context.registerBeanDefinition("listener", listenerDef);
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try {
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context.refresh();
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fail("Should have thrown BeanCreationException with nested BeanCurrentlyInCreationException");
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}
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catch (BeanCreationException ex) {
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assertTrue(ex.contains(BeanCurrentlyInCreationException.class));
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}
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}
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@Test
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public void listenerAndBroadcasterWithResolvableCircularReference() {
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public void listenerAndBroadcasterWithCircularReference() {
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StaticApplicationContext context = new StaticApplicationContext();
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context.registerBeanDefinition("broadcaster", new RootBeanDefinition(BeanThatBroadcasts.class));
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RootBeanDefinition listenerDef = new RootBeanDefinition(BeanThatListens.class);
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@@ -177,6 +103,7 @@ public class ApplicationContextEventTests {
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Assert.assertEquals("The event was not received by the listener", 2, broadcaster.receivedCount);
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}
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public static class MyEvent extends ApplicationEvent {
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public MyEvent(Object source) {
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@@ -184,11 +111,52 @@ public class ApplicationContextEventTests {
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}
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}
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private static final class NoOpApplicationListener implements ApplicationListener {
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public static class MyOtherEvent extends ApplicationEvent {
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public MyOtherEvent(Object source) {
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super(source);
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}
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}
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public static class MyOrderedListener1 implements ApplicationListener, Ordered {
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public final Set<ApplicationEvent> seenEvents = new HashSet<ApplicationEvent>();
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public void onApplicationEvent(ApplicationEvent event) {
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this.seenEvents.add(event);
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}
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public int getOrder() {
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return 0;
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}
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}
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public interface MyOrderedListenerIfc<E extends ApplicationEvent> extends ApplicationListener<E>, Ordered {
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}
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public static abstract class MyOrderedListenerBase implements MyOrderedListenerIfc<MyEvent> {
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public int getOrder() {
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return 1;
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}
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}
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public static class MyOrderedListener2 extends MyOrderedListenerBase {
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private final MyOrderedListener1 otherListener;
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public MyOrderedListener2(MyOrderedListener1 otherListener) {
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this.otherListener = otherListener;
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}
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public void onApplicationEvent(MyEvent event) {
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assertTrue(otherListener.seenEvents.contains(event));
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}
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}
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}
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