To use the cache, call the API to determine whether an object was previously cached.
要使用缓存，需要调用API来确定先前是否已缓存了对象。
Database information is mapped using a JCache implementation, cached in an ActiveSpace clustered cache and distributed to the application through an object relational mapping.
数据库信息使用JCache实现进行映射，缓存在ActiveSpace的集群缓存中，并通过对象关系映射提供给应用程序。
Initializing the JCS cache region object gives you access to almost all of the common methods you'll need. Listing 3 initializes the JCS object and gets an instance of the default cache region.
初始化jcs缓存区域对象能使您访问大部分所需的常用方法。
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