If a task is producing several results, another task may start as
soon as the first results are ready.
For that, ecFlow introduces the concept of event‘s.
An event is a message that a task will report to ecflow_server while it is running.
Events have names and a task can set several of them.
Ecf Script
We will create new tasks (t3, t4) that will be triggered by the events emitted in task t2.
Create the ecf script for t3 and t4 by copying t1.
To notify ecflow_server, the task (t2 in the example below)
must call ecflow_client –event which is one of the child command‘s
Amend $HOME/course/test/f1/t2.ecf
%include <head.h> echo "I will now sleep for %SLEEP% seconds" sleep %SLEEP% ecflow_client --event=a # Set the first event sleep %SLEEP% # Sleep a bit more ecflow_client --event=b # Set the second event sleep %SLEEP% # A last nap... %include <tail.h>
Text
# Definition of the suite test.
suite test
edit ECF_INCLUDE "$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
trigger t1 eq complete
event a
event b
task t3
trigger t2:a
task t4
trigger t2:b
endfamily
endsuite
Python
$HOME/course/test.py
import os
from ecflow import Defs,Suite,Family,Task,Edit,Trigger,Event
def create_family_f1():
return Family("f1",
Edit(SLEEP=20),
Task("t1"),
Task("t2",
Trigger("t1 == complete"),
Event("a"),
Event("b")),
Task("t3",
Trigger("t2:a")),
Task("t4",
Trigger("t2:b")))
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("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
- Update test.def or test.py
- Edit t2.ecf to call ecflow_client –event.
- Copy t1.ecf to t3.ecf and t4.ecf
- 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
- See the triggers by selecting t2/t3 and clicking on the trigger tab
1 Comment
Avi Bahra
Alternative styles
import os import ecflow def create_family_f1(): f1 = ecflow.Family("f1") f1.add_variable("SLEEP", 20) f1.add_task("t1") t2 = f1.add_task("t2") t2.add_trigger("t1 eq complete") t2.add_event("a") t2.add_event("b") f1.add_task("t3").add_trigger("t2:a") f1.add_task("t4").add_trigger("t2:b") return f1 print("Creating suite definition") defs = ecflow.Defs() suite = defs.add_suite("test") suite.add_variable("ECF_INCLUDE", os.path.join(os.getenv("HOME"), "course")) suite.add_variable("ECF_HOME", os.path.join(os.getenv("HOME"), "course")) suite.add_family( create_family_f1() ) print(defs) print("Checking job creation: .ecf -> .job0") print(defs.check_job_creation()) print("Checking trigger expressions") print(defs.check()) print("Saving definition to file 'test.def'") defs.save_as_defs("test.def") print("replace suite /test in server") defs.test.replace_on_server()import os from ecflow import * home = os.path.join(os.getenv("HOME"), "course") def create_family_f1(): f1 = Family("f1") + [ Edit(SLEEP=20), Task("t1"), Task("t2") + Trigger(["t1"]) + Event("a") + Event("b"), Task("t3") + Trigger("t2:a"), Task("t4") + Trigger("t2:b") ] return f1 print("Creating suite definition") defs = Defs() + Suite("test") defs.test += [ Edit(ECF_INCLUDE=home,ECF_HOME=home), create_family_f1() ] print(defs) print("Checking job creation: .ecf -> .job0") print(defs.check_job_creation()) print("Saving definition to file 'test.def'") defs.save_as_defs("test.def") print("replace suite /test in server") defs.test.replace_on_server()