Because the JNDI lookup can be expensive, it is good practice to store the provider object as a member variable of the portlet, and to initialize it in the init method.

因为JNDI查找开销非常大，所以最好的做法是将提供程序对象存储为Portlet的成员变量，并在init方法中对其初始化。

youdao

A callback function that creates the provider object.

一个回调函数，用于创建提供程序对象。

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Error occurred when calling methods on object link provider object.

调用对象链接提供程序对象中方法出错。

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No other processed food provider so proudly displays - IN THE WINDOW - such an unattractive object from which your lunch is sliced.

BBC: Cheeseburger