This is a small follow up exercise showing user of embedded triggers.
These are trigger expression embedded within the scripts using the --wait child command.
Whilst the expression is not true, then job will hold
Ecf Script
Add/amend the t2.ecf script
$HOME/course/test/f1/t2.ecf
%include <head.h> ecflow_client --wait="t1 == complete" %include <tail.h>
Text
# Definition of the suite test.
suite test
edit ECF_INCLUDE "$HOME/course" # replace '$HOME' with the path to your home directory
edit ECF_HOME "$HOME/course"
family f1
edit SLEEP 20
task t1
task t2
endfamily
endsuite
Python
$HOME/course/test.py
import os
from ecflow import Defs,Suite,Family,Task,Edit,Trigger
def create_family_f1():
return Family("f1",
Edit(SLEEP=20),
Task("t1"),
Task("t2"))
print("Creating suite definition")
home = os.path.join(os.getenv("HOME"), "course")
defs = Defs(
Suite("test",
Edit(ECF_INCLUDE=home,ECF_HOME=home),
create_family_f1()))
print(defs)
print("check trigger expressions")
check = defs.check()
assert len(check) == 0, check
print("Checking job creation: .ecf -> .job0")
print(defs.check_job_creation())
print("Saving definition to file 'test.def'")
defs.save_as_defs("test.def")
What to do
- Edit the suite definition file.
- Replace the suite
python: python3 test.py ; python3 client.py
text: ecflow_client --suspend=/test ; ecflow_client --replace=/test test.def - Observe the tasks in ecflow_ui .
- Notice the wait icon on task t2.
Introduce an error in the wait expression and ensure that abort the job
Introduce error in wait expressionecflow_client --wait="txx == complete" # there is no node with name tax, this should abort the task
Introduce an impossible expression, what is the effect.
ecflow_client --wait="1 == 0" # this expression will never be satisfied.