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HotSwappableTargetSourceTests.java
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HotSwappableTargetSourceTests.java
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/*
* Copyright 2002-2019 the original author or authors.
*
* 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
*
* https://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 org.springframework.aop.target;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.springframework.aop.framework.Advised;
import org.springframework.aop.framework.ProxyFactory;
import org.springframework.aop.support.DefaultPointcutAdvisor;
import org.springframework.aop.testfixture.interceptor.SerializableNopInterceptor;
import org.springframework.beans.factory.support.DefaultListableBeanFactory;
import org.springframework.beans.factory.xml.XmlBeanDefinitionReader;
import org.springframework.beans.testfixture.beans.Person;
import org.springframework.beans.testfixture.beans.SerializablePerson;
import org.springframework.beans.testfixture.beans.SideEffectBean;
import org.springframework.core.testfixture.io.SerializationTestUtils;
import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;
import static org.springframework.core.testfixture.io.ResourceTestUtils.qualifiedResource;
/**
* @author Rod Johnson
* @author Chris Beams
*/
public class HotSwappableTargetSourceTests {
/** Initial count value set in bean factory XML */
private static final int INITIAL_COUNT = 10;
private DefaultListableBeanFactory beanFactory;
@BeforeEach
public void setup() {
this.beanFactory = new DefaultListableBeanFactory();
new XmlBeanDefinitionReader(this.beanFactory).loadBeanDefinitions(
qualifiedResource(HotSwappableTargetSourceTests.class, "context.xml"));
}
/**
* We must simulate container shutdown, which should clear threads.
*/
@AfterEach
public void close() {
// Will call pool.close()
this.beanFactory.destroySingletons();
}
/**
* Check it works like a normal invoker
*/
@Test
public void testBasicFunctionality() {
SideEffectBean proxied = (SideEffectBean) beanFactory.getBean("swappable");
assertThat(proxied.getCount()).isEqualTo(INITIAL_COUNT);
proxied.doWork();
assertThat(proxied.getCount()).isEqualTo((INITIAL_COUNT + 1));
proxied = (SideEffectBean) beanFactory.getBean("swappable");
proxied.doWork();
assertThat(proxied.getCount()).isEqualTo((INITIAL_COUNT + 2));
}
@Test
public void testValidSwaps() {
SideEffectBean target1 = (SideEffectBean) beanFactory.getBean("target1");
SideEffectBean target2 = (SideEffectBean) beanFactory.getBean("target2");
SideEffectBean proxied = (SideEffectBean) beanFactory.getBean("swappable");
assertThat(proxied.getCount()).isEqualTo(target1.getCount());
proxied.doWork();
assertThat(proxied.getCount()).isEqualTo((INITIAL_COUNT + 1));
HotSwappableTargetSource swapper = (HotSwappableTargetSource) beanFactory.getBean("swapper");
Object old = swapper.swap(target2);
assertThat(old).as("Correct old target was returned").isEqualTo(target1);
// TODO should be able to make this assertion: need to fix target handling
// in AdvisedSupport
//assertEquals(target2, ((Advised) proxied).getTarget());
assertThat(proxied.getCount()).isEqualTo(20);
proxied.doWork();
assertThat(target2.getCount()).isEqualTo(21);
// Swap it back
swapper.swap(target1);
assertThat(proxied.getCount()).isEqualTo(target1.getCount());
}
@Test
public void testRejectsSwapToNull() {
HotSwappableTargetSource swapper = (HotSwappableTargetSource) beanFactory.getBean("swapper");
assertThatIllegalArgumentException().as("Shouldn't be able to swap to invalid value").isThrownBy(() ->
swapper.swap(null))
.withMessageContaining("null");
// It shouldn't be corrupted, it should still work
testBasicFunctionality();
}
@Test
public void testSerialization() throws Exception {
SerializablePerson sp1 = new SerializablePerson();
sp1.setName("Tony");
SerializablePerson sp2 = new SerializablePerson();
sp1.setName("Gordon");
HotSwappableTargetSource hts = new HotSwappableTargetSource(sp1);
ProxyFactory pf = new ProxyFactory();
pf.addInterface(Person.class);
pf.setTargetSource(hts);
pf.addAdvisor(new DefaultPointcutAdvisor(new SerializableNopInterceptor()));
Person p = (Person) pf.getProxy();
assertThat(p.getName()).isEqualTo(sp1.getName());
hts.swap(sp2);
assertThat(p.getName()).isEqualTo(sp2.getName());
p = (Person) SerializationTestUtils.serializeAndDeserialize(p);
// We need to get a reference to the client-side targetsource
hts = (HotSwappableTargetSource) ((Advised) p).getTargetSource();
assertThat(p.getName()).isEqualTo(sp2.getName());
hts.swap(sp1);
assertThat(p.getName()).isEqualTo(sp1.getName());
}
}