Connecting to a data source means establishing communications with a DBMS to access the data.
连接资料来源是指建立与DBMS的沟通以便存取资料。
Retrieving data from any given source usually requires some initialization activities, such as connecting to a data source and providing valid authentication information.
从任何给定的数据源检索数据通常都需要进行一些初始化活动，例如连接到数据源和提供有效的认证信息。
The embedded transaction container requires that a specific data source, TxnDataSource, is used when connecting to the database for container Managed Persistence (CMP).
在连接Container Managed Persistence (CMP)的数据库时，嵌入式事务容器要求使用一个特定的数据源txndatasource。
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