@Cache注释用法错误 [英] @Cache annotation usage error

问题描述

我添加了以下批注以启用对我的EJB3实体之一的缓存，以测试使用ehCache的缓存，在这里我将Hibernate用作持久性提供程序:

I added the following annotation to enable cache to one of my EJB3 entities, to test caching with ehCache, where I use Hibernate as the persistence provider:

....
import org.hibernate.annotations.Cache;
import org.hibernate.annotations.CacheConcurrencyStrategy;

@Entity
@Table(name = "F")
@Cache(usage=CacheConcurrencyStrategy.READ_WRITE)
@NamedQueries({ @NamedQuery(name = "F.findAll", query = "SELECT f FROM F f")})
public class F implements Serializable {
   .....
}

我在persistence.xml中添加了以下内容:

I added the following to persistence.xml:

<property name="hibernate.cache.provider_class" value="org.hibernate.cache.EhCacheProvider"/>
<property name="hibernate.cache.provider_configuration_file_resource_path" value="/ehcache.xml"/>
<property name="hibernate.cache.use_second_level_cache" value="true"/>

当我尝试编译时，出现以下错误:

And when I try to compile I get the following error:

/persistence/F.class):警告:不能 在中找到注释方法"usage()" 类型 'org.hibernate.annotations.Cache': 的课程文件 org.hibernate.annotations.Cache不 发现发生了异常 编译器(1.6.0_16).请提交错误 在Java开发人员连接处 ( http://java.sun.com/webapps/bugreport ) 在检查Bug Parade之后 重复.包括您的程序并 您的以下诊断 报告.谢谢你. com.sun.tools.javac.code.Symbol $ CompletionFailure: 的课程文件 org.hibernate.annotations.CacheConcurrencyStrategy 找不到

/persistence/F.class): warning: Cannot find annotation method 'usage()' in type 'org.hibernate.annotations.Cache': class file for org.hibernate.annotations.Cache not found An exception has occurred in the compiler (1.6.0_16). Please file a bug at the Java Developer Connection (http://java.sun.com/webapps/bugreport) after checking the Bug Parade for duplicates. Include your program and the following diagnostic in your report. Thank you. com.sun.tools.javac.code.Symbol$CompletionFailure: class file for org.hibernate.annotations.CacheConcurrencyStrategy not found

有人可以在这里帮助我，让我知道我需要做的还是当前做错了什么?

Can anyone help me out here and let me know what I need to do or am doing wrong currently ?

推荐答案

@org.hibernate.annotations.Cache(usage = org.hibernate.annotations.CacheConcurrencyStrategy.READ_WRITE)

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