到网格中任何对象的主要访问方式应该是通过 Map API 或使用对象主键的 EntityManager find() 方法。

The principal access path to any object in a grid should be either through the Map API or through an EntityManager find() using the object’s primary key.

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首先，根据业务对象中的主键将事件划分到一些分组中。

At first, the events are divided into some groups by primary keys in the business objects.

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该关系分别为这四个业务对象的非主键 state 属性定义一个静态关系。

The relationship defines a static relationship for the non-primary key state property for each of the four business objects.

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