| 摘要 |
PROBLEM TO BE SOLVED: To further flexibly configure a control system for applying a uniform interface to a POS application on the basis of Java (C). SOLUTION: A factory class 34 to generate a device service(DS) 13 by device control(DC) 12 refers to an information file 36 and when a trace is requested, a trace class 35 is loaded in place of the DS 13. Then, the trace class 35 loads the DS 13. In such a control system 39, a function of tracing the execution condition of the DS 13 as required can be integrated without affecting the specification of the DC 12.
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