Generation and concurrent execution of a virtual task in an execution order determining system

Abstract

A job control information storing section stores execution conditions under which execution of tasks is started, and an execution order of the tasks. A job executing section executes the tasks. A job execution administering section monitors a state of the task being executed to detect the task whose state is shifted to a process standby state of waiting for a response from another one of the tasks, based on the execution conditions, and responds to a request of executing the another task from the task whose state is shifted, in response to accepting the request from the task whose state is shifted. A virtual task generating section generates a virtual task as a copy of the task whose state is detected to be shifted. A virtual task registering section adds the virtual task to the execution order to concurrently execute the virtual task with the task whose state is shifted.