Page History

...

In this exercise, we will use one of the command-line features of ecflow.

We will use query command, to determine the state of a node, event, meter.  An alternative to the query command would be to use the python apiAPI.

The general format is:

ecflow_client --query arg1 arg2 arg3

...

• state=$(ecflow_client --query state /path/to/node)                                                          # return node state 
• dstate=$(ecflow_client --query dstate /path/to/node)                                                     # state that can includes suspended

• value=$(ecflow_client --query repeat /path/to/node )                                                      # return the current value as a string

• value=$(ecflow_client --query repeat /path/to/node   prev  prev )                                            # # return the previous value as a string, does not modify real repeat

• value=$(ecflow_client --query repeat /path/to/node   next)                                            # return the next value as a string, does not modify real repeat

• event=$(ecflow_client --query event /path/to/task/with/event:event_name)                # return set | clear to standard out
• meter=$(ecflow_client --query meter /path/to/task/with/meter:meter_name)              # returns the current value of the meter 
• value=$(ecflow_client --query variable /path/to/task/with/var:var_name )                    # returns the variable value  

• limit_value=$(ecflow_client --query limit  /path/to/task/with/limit:limit_name)              # returns the current value of the limit 

• limit_max=$(ecflow_client --query limit_max /path/to/task/with/limit:limit_name)        # returns the max value of the limit 

• label_value=$(ecflow_client --query label %ECF_NAME%:label_name)                          # returns the current value of the label 
• value=$(ecflow_client --query trigger /path/to/node/with/trigger \"/suite/task == complete\")   # return true if expression evaluates false otherwise

...

What to do

1. Go back to the previous excercise exercise where we finished adding a meter.
2. Edit the definition file or python to add the modifications. You should only need to add a task query.
3. create file query.ecf to call ecflow_client –query
4. Replace the suite
   python: python3 test.py ; python3 client.py
   text:      ecflow_client --suspend=/test   ; ecflow_client --replace=/test  test.def
5. Observe the tasks in ecflow_ui

6. Modify query.ecf, to use ecflow_client --query variable, and show this variable in the query label. 

   Note
   Although a variable is accessible in the script by using %VAR%, ecflow_client --query variable might be more useful in a an interactive shell or a different server

   
      

...