With the declare error or declare warning syntax, you can customize the ajc compiler's response to the potential occurrence of a join point, as shown in Listing 7.

使用declare error或declare warning语法，您可以定制ajc编译器对潜在join point的响应，如清单7所示。

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Situated in a high-risk zone, Indonesia now has developed the capability to warn of the potential for a tsunami from an undersea earthquake within five minutes of its occurrence.

CNN: Asian tsunami warning system: A last-mile challenge