The ideal solution would be to wait on a JAMS message, or to query an indicator that indicates updated power data is available, and then perform the GET.
理想的解决方案是等待 JAMS 消息或者查询某个表示有更新的电力数据可用的标志，然后再执行 GET。
At the start of inbound message processing, the system availability indicator is set to "true", indicating that the endpoint system is available.
在入站消息处理的开始阶段，系统可用性指示器被设置为“true”，表示端点系统是可用的。
At the start of each iteration, the system availability indicator determines whether to retrieve the next message for processing, or to suspend processing by scheduling a Human Task.
在每次迭代的开始，系统可用性指示器判断是获取下一条消息以进行处理，还是通过安排一个Human Task来暂停处理。
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