在实现时,我遇到了Spring Cache Abstraction VS接口的问题.
可以说我有以下界面：
package com.example.cache;
public interface IAddItMethod
{
Integer addIt(String key);
}
以下两个实现：
package com.example.cache;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.stereotype.Component;
@Component
public class MethodImplOne implements IAddItMethod
{
@Override
@Cacheable(value="integersPlusOne",key="#keyOne")
public Integer addIt(String keyOne)
{
return new Integer(Integer.parseInt(keyOne) + 1);
}
}
.
package com.example.cache;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.stereotype.Component;
@Component
public class MethodImplTwo implements IAddItMethod
{
@Override
@Cacheable(value="integersPlusTwo",key="#keyTwo")
public Integer addIt(String keyTwo)
{
return new Integer(Integer.parseInt(keyTwo) + 2);
}
}
请注意,IAddItMethod不是指定@Cacheable的那个.我们可以在没有@Cacheable注释的情况下使用其他实现(ex MethodImplThree).
我们有一个简单的beans.xml：
context:component-scan base-package="com.example.cache"
除此之外,还有两个jUnit测试用例：
package com.example.cache;
import static org.junit.Assert.assertEquals;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = {"classpath:beans.xml"})
public class MethodImplOneTest
{
@Autowired
@Qualifier("methodImplOne")
private IAddItMethod classUnderTest;
@Test
public void testInit()
{
int number = 1;
assertEquals(new Integer(number + 1),classUnderTest.addIt("" + number));
}
}
.
package com.example.cache;
import static org.junit.Assert.assertEquals;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = {"classpath:beans.xml"})
public class MethodImplTwoTest
{
@Autowired
@Qualifier("methodImplTwo")
private IAddItMethod classUnderTest;
@Test
public void testInit()
{
int number = 1;
assertEquals(new Integer(number + 2),classUnderTest.addIt("" + number));
}
}
当我单独运行测试时,它们会成功.
但是,如果我一起运行它们(选择包,右键单击,运行为),第二个(不一定是MethodImplTwoTest,只是第二个运行)将失败,并出现以下异常：
java.lang.IllegalArgumentException: Null key returned for cache operation (maybe you are using named params on classes without debug info?) CacheableOperation[public java.lang.Integer com.example.cache.MethodImplOne.addIt(java.lang.String)] caches=[integersPlusOne] | condition='' | key='#keyOne'
at org.springframework.cache.interceptor.CacheAspectSupport.inspectCacheables(CacheAspectSupport.java:297)
at org.springframework.cache.interceptor.CacheAspectSupport.execute(CacheAspectSupport.java:198)
at org.springframework.cache.interceptor.CacheInterceptor.invoke(CacheInterceptor.java:66)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
at $Proxy16.addIt(Unknown Source)
at com.example.cache.ITMethodImplOneIntegrationTest.testInit(ITMethodImplOneIntegrationTest.java:26)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74)
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:83)
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:231)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:71)
at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:174)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
注意：我正在使用Eclipse STS 3.0,并且启用了“为生成的类文件添加变量属性”.
重要提示：如果我没有在@Cacheable注释中指定“密钥”,则它可以正常工作.
有什么我忘了指定的吗？配置？注释？
提前致谢！
最佳答案
