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jobber examples: out-of-order processing

It is possible to executes tasks "out-of-order", i.e. to deviate from sequential processing of the task queue.

  • With the exec action arbitrary tasks from the task list can be executed.
  • With the hold action execution of specific tasks can be prevented. The hold status can be ended with the release action.
  • The format of the exec, hold and release actions is action[:spec], where spec can be all (with is default) or a comma separated list of ranges (see below).
  • Action print:held is used to show the effects of hold and release. Action print[:spec] prints tasks from the task queue that match the spec criterion as a shell script. spec can be all (with is default) or one out of queued, running, done, failed, held.

exec

shell$ cat task.list
sleep 1; echo '### this is task 1 ###'
sleep 1; echo '### this is task 2 ###'
sleep 1; echo '### this is task 3 ###'
sleep 1; echo '### this is task 4 ###'
sleep 1; echo '### this is task 5 ###'
sleep 1; echo '### this is task 6 ###'
sleep 1; echo '### this is task 7 ###'
sleep 1; echo '### this is task 8 ###'
sleep 1; echo '### this is task 9 ###'
sleep 1; echo '### this is task 10 ###'
shell$ jobber task.list init
[2022-04-05T17:39:38] appended 10 tasks
shell$ jobber task.list 3 
[2022-04-05T17:39:38] 1.1 task.worker: sleep 1; echo '### this is task 1 ###'
### this is task 1 ###
[2022-04-05T17:39:39] 1.1 exit status: 0
[2022-04-05T17:39:39] 2.2 task.worker: sleep 1; echo '### this is task 2 ###'
### this is task 2 ###
[2022-04-05T17:39:40] 2.2 exit status: 0
[2022-04-05T17:39:40] 3.3 task.worker: sleep 1; echo '### this is task 3 ###'
### this is task 3 ###
[2022-04-05T17:39:41] 3.3 exit status: 0
shell$ jobber task.list exec:5,7-8 
[2022-04-05T17:39:41] 5.4 task.worker: sleep 1; echo '### this is task 5 ###'
### this is task 5 ###
[2022-04-05T17:39:42] 5.4 exit status: 0
[2022-04-05T17:39:42] 7.5 task.worker: sleep 1; echo '### this is task 7 ###'
### this is task 7 ###
[2022-04-05T17:39:43] 7.5 exit status: 0
[2022-04-05T17:39:43] 8.6 task.worker: sleep 1; echo '### this is task 8 ###'
### this is task 8 ###
[2022-04-05T17:39:44] 8.6 exit status: 0
shell$ jobber task.list 3 
[2022-04-05T17:39:44] 4.7 task.worker: sleep 1; echo '### this is task 4 ###'
### this is task 4 ###
[2022-04-05T17:39:45] 4.7 exit status: 0
[2022-04-05T17:39:45] 6.8 task.worker: sleep 1; echo '### this is task 6 ###'
### this is task 6 ###
[2022-04-05T17:39:46] 6.8 exit status: 0
[2022-04-05T17:39:46] 9.9 task.worker: sleep 1; echo '### this is task 9 ###'
### this is task 9 ###
[2022-04-05T17:39:47] 9.9 exit status: 0
shell$

hold/release

shell$ cat task.list
sleep 1; echo '### this is task 1 ###'
sleep 1; echo '### this is task 2 ###'
sleep 1; echo '### this is task 3 ###'
sleep 1; echo '### this is task 4 ###'
sleep 1; echo '### this is task 5 ###'
sleep 1; echo '### this is task 6 ###'
sleep 1; echo '### this is task 7 ###'
sleep 1; echo '### this is task 8 ###'
sleep 1; echo '### this is task 9 ###'
sleep 1; echo '### this is task 10 ###'
shell$ jobber task.list init
[2022-04-05T17:40:09] appended 10 tasks
shell$ jobber task.list 3 
[2022-04-05T17:40:09] 1.1 task.worker: sleep 1; echo '### this is task 1 ###'
### this is task 1 ###
[2022-04-05T17:40:10] 1.1 exit status: 0
[2022-04-05T17:40:10] 2.2 task.worker: sleep 1; echo '### this is task 2 ###'
### this is task 2 ###
[2022-04-05T17:40:11] 2.2 exit status: 0
[2022-04-05T17:40:11] 3.3 task.worker: sleep 1; echo '### this is task 3 ###'
### this is task 3 ###
[2022-04-05T17:40:12] 3.3 exit status: 0
shell$ jobber task.list print:held
#!/bin/bash
shell$ jobber task.list hold:4-5,7-8
[2022-04-05T17:40:12] tasks changed to state H: 4
shell$ jobber task.list print:held
#!/bin/bash
# task 4 worker  held
sleep 1; echo '### this is task 4 ###'
# task 5 worker  held
sleep 1; echo '### this is task 5 ###'
# task 7 worker  held
sleep 1; echo '### this is task 7 ###'
# task 8 worker  held
sleep 1; echo '### this is task 8 ###'
shell$ jobber task.list release:4
[2022-04-05T17:40:13] tasks changed to state Q: 1
shell$ jobber task.list print:held
#!/bin/bash
# task 5 worker  held
sleep 1; echo '### this is task 5 ###'
# task 7 worker  held
sleep 1; echo '### this is task 7 ###'
# task 8 worker  held
sleep 1; echo '### this is task 8 ###'
shell$ jobber task.list 3 
[2022-04-05T17:40:13] 4.4 task.worker: sleep 1; echo '### this is task 4 ###'
### this is task 4 ###
[2022-04-05T17:40:14] 4.4 exit status: 0
[2022-04-05T17:40:14] 6.5 task.worker: sleep 1; echo '### this is task 6 ###'
### this is task 6 ###
[2022-04-05T17:40:15] 6.5 exit status: 0
[2022-04-05T17:40:15] 9.6 task.worker: sleep 1; echo '### this is task 9 ###'
### this is task 9 ###
[2022-04-05T17:40:16] 9.6 exit status: 0
shell$