21.3.3 State transition of TimerManager

The status of TimerManager changes depending on the lock or stop process, by suspend and resume. You can check the status of TimerManager at the respective time, by using the isStopped, isStopping, and isSuspended method. The following figure shows the status transition of TimerManager.

Figure 21‒6: Status transition of TimerManager

The following table describes the details of each status.

Table 21‒11: Status of TimerManager
Number in figure^#	Status	Explanation
1	`running`	It is a status indicating that `TimerManager` is running. You can receive and execute a new schedule.
2	`suspending`	It is a status indicating that suspension is in process. This status shows that a task is being executed when suspension is executed. If no task is being executed, the status transits to `suspended` status.
3	`suspended`	It is a status indicating that all the tasks are suspended. When the status is `suspended`, all the scheduled tasks are not executed. The tasks with `suspended` status are executed when those tasks are resumed.
4	`stopping`	It is a status indicating that the stopping `TimerManager` is being executed. This status shows that a task is being executed when stopping is `TimerManager` is being executed. If no task is being executed, the status transits to `stopped` status.
5	`stopped`	It is a status indicating that `TimerManager` is stopped. This status shows that all the tasks are stopped and no process is executed after that. You cannot resume `TimerManager`, once it is stopped.

#: Number indicating the number in Figure 21-6.

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