deferred class BACKGROUND_JOB

Features exported to LOOP_ITEM

Describe job to be executed in the background, when there nothing more important to do. Such job is ready to run at any time.

Direct parents

conformant parents

JOB

Known children

conformant children

SIMPLE_BACKGROUND_JOB

Summary

exported features

Details

prepare (ready: READY_DESCRIPTION)

use ready to descibe condition that make this job ready to continue.

require

  • ready /= Void
  • not ready.queryable

is_ready (ready: READY_DESCRIPTION): BOOLEAN

check if this job is ready to continue his work

require

  • ready /= Void
  • ready.queryable

priority: INTEGER

Never change priority after job inserted in loop_item. Priority should only be set at creation time.

deferred continue

Continue to do the job The work to do has to be small work and non blocking, it will continue on next call

deferred done: BOOLEAN

done returns True when the job is finished. Then the job may be restart(ed) if it need to run again.

deferred restart

Configure the job like the initial state. Example: when some window dialog appears second time, all jobs from this window are restarted.

require

  • done

ensure

  • not done

< (other: JOB): BOOLEAN

Class invariant