我有4个单身类与私人构造函数 和我想创建所有4类的bean属性。春天(错误创建bean,没有可见的构造函数)与私有构造函数的单身类
的主要问题是,我可以为3类 和这3类创建bean有一个getInstance方法和 私有构造函数()(Singleton类),但第四和最后一个类似的结构 抛出异常(异常消息粘贴在下面)
请在下面找到getInstance方法,私有构造函数 和bean id声明。在所有四个bean声明中都是相同的
但是,如果我将构造函数从“Private”更改为“Public”,则 我没有收到错误。任何人都可以对发生的事情有所了解吗?由于其他三个类有私有构造函数和他们的工作完全正常
的getInstance()方法
public static ApplicationConfiguration getInstance() throws IOException,
IllegalArgumentException, InconsistentDataException {
ApplicationConfiguration result = instance.get();
if (result == null) {
try {
// Check again if already created
result = instance.get();
if (result == null) {
result = new ApplicationConfiguration();
}
} finally {
// something here
}
}
return result;
}
的私有构造
private ApplicationConfiguration() throws Exception {
// call a method here
}
bean属性声明
<bean id="configManager" class="com.manager.ApplicationConfiguration" factory-method="getInstance" />
<bean id="configEnricher" class="com.enricher.ApplicationConfiguration" factory-method="getInstance" />
<bean id="configBussiness" class="com.validationservice.ApplicationConfiguration" factory-method="getInstance" />
以上三件作品
这个bean属性引发错误
<bean id="configEviction" class="com.evictionservice.ApplicationConfiguration" factory-method="getInstance" />
异常消息
[#|2012-08-07 11:53:21,130|ERROR|RMI TCP Connection(226)-172.18.36.14|org.springframework.
web.context.ContextLoader||slodev-rhngp5.mblox.com|core-1|Context initialization failed|#]
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'co
nfigEviction' defined in ServletContext resource [/WEB-INF/camel-context.xml]: Initializat
ion of bean failed; nested exception is org.springframework.aop.framework.AopConfigExcepti
on: Could not generate CGLIB subclass of class [class com.evictionservice.ApplicationConfiguration]:
Common causes of this problem include using
a final class or a non-visible class; nested exception is java.lang.IllegalArgumentExcepti
on: No visible constructors in class com.evictionservice.ApplicationConfiguration
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.do
CreateBean(AbstractAutowireCapableBeanFactory.java:526)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.cr
eateBean(AbstractAutowireCapableBeanFactory.java:455)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(Abstr
actBeanFactory.java:293)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingl
eton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(Abstrac
tBeanFactory.java:290)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractB
eanFactory.java:192)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstant
iateSingletons(DefaultListableBeanFactory.java:585)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactor
yInitialization(AbstractApplicationContext.java:895)
at org.springframework.context.support.AbstractApplicationContext.refresh(Abstract
ApplicationContext.java:425)
:
你对com.evictionservice.ApplicationConfiguration类或其任何方法有任何注释 - 比如@Transaction等。 – 2012-08-07 14:11:25
看起来这里有4个不同的类(所有不同的包)。每个ApplicationConfiguration是否扩展一个通用接口?这是什么样子?在你的spring上下文中有什么东西在com.evictionservice类上代理? – 2012-08-07 15:55:51