Error retrieving information from user datastore devices 从用户数据存储中检索信息时发生错误(设备)
First, we define the data that we will store in the datastore 首先,定义要存储在数据存储器中的数据。
Simulated data access objects essentially simulate a back-end datastore 模拟数据访问对象实际上模拟后端数据存储。
In this case, i start by writing a dao to provide search capabilities on the product catalog datastore 在这个示例中,我从编写dao开始,用它提供对产品目录数据存储的搜索功能。
Any other program that knows the attributes of our objects can use the same datastore more on this under 任何知道对象属性的其它程序都可以使用同样的数据存储器(这方面的详细信息在
In the persistent classes, the datastore is an abstract storage device, which can be a file or a database, for example 在persistent类中,数据存储器是抽象存储设备,例如,它可以是文件或数据库。
And even then, if you move away from relational database as your underlying datastore, then you are totally dead 甚至于,如果您不使用关系数据库作为底层数据存储库,那么jdbc实现也将完全不能工作。
When you call a method on one of pixie s proxy objects, it magically connects to the pixie datastore and fetches the real object for you 当您调用其中一个pixie代理对象的方法时,它神奇地连接到pixie数据存储并为您获取真正需要的对象。
Finally, we look through the datastore for objects whose name key contains the string homework 1 and perform an operation on each of those objects 最后,遍历数据存储器,查找那些name键包含字符串homework1的对象,然后对这些对象中的每一个执行操作。
When you add a local datastore to your application, you will have a single place through which all data storage and retrieval requests pass :当你为你的应用程序增加一个本地数据存储时,你将有一个单独的位置用来处理你所有的数据存储以及取回经过的请求。