Data processing apparatus, data processing method, and storage medium storing computer program

A method for a data processing apparatus that requests an external apparatus to execute apart of sequential processing, acquires a control request from the external apparatus, and executes the sequential processing in response to the control request that reflects an execution result of the part of the sequential processing performed by the external apparatus, the method comprising:

• a generation step for generating identification information that is used to determine whether a processing execution request sent to the external apparatus is output via an operation unit of the data processing apparatus;
• a storage step for storing, in a storage medium, the identification information generated in the generation step;
• a transmission step for transmitting the identification information generated in the generation step to the external apparatus;
• an acquisition step for acquiring the control request from the external apparatus;
• a determination step for determining whether the identification information stored in the storage step coincides with identification information added to the control request acquired in the acquisition step;
• and
• an execution step for executing processing to be performed based on the control request if in the determination step it is determined that the identification information stored in the storage step coincides with the identification information added to the control request acquired in the acquisition step,
• wherein the execution step is for executing the processing to be performed based on the control request after completing execution of processing to be performed based on the identification information stored in the storage step, if in the determination step it is determined that the identification information stored in the storage step does not coincide with the identification information added to the control request acquired in the acquisition step.

A computer-readable storage medium storing a computer program that enables a computer to function as a data processing apparatus that requests an external apparatus to execute apart of sequential processing, acquires a control request from the external apparatus, and executes the sequential processing in response to the control request that reflects an execution result of the part of the sequential processing performed by the external apparatus, the computer program stored in the storage medium comprising:

• computer-executable instructions for generating identification information that is used to determine whether a processing execution request sent to the external apparatus is output via an operation unit of the data processing apparatus;
• computer-executable instructions for storing the generated identification information in a storage medium;
• computer-executable instructions for transmitting the generated identification information to the external apparatus;
• computer-executable instructions for acquiring the control request from the external apparatus;
• computer-executable instructions for determining whether the stored identification information coincides with identification information added to the acquired control request;
• computer-executable instructions for executing processing to be performed based on the control request if it is determined that the stored identification information coincides with the identification information added to the acquired control request;
• and
• computer-executable instructions for executing the processing to be performed based on the control request after completing execution of processing to be performed based on the stored identification information, if it is determined that the stored identification information does not coincide with the identification information added to the acquired control request.