J2C Architecture

The J2C architecture is much like that of JDBC. It is built around several layered components. See Figure 8-1, which we will discuss now in general and then later in detail (including system contracts and Common Client Interface) in the balance of this chapter.

Figure 8-1. J2C component interaction.

Essentially, a vendor provides a resource adapter that handles the low-level details of interacting with the enterprise information system. This is the “EIS-specific interface” shown in Figure 8-1. The adapter uses J2C-defined APIs for interacting with the J2EE container when necessary, and more importantly, the ...

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