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All communication with the ecflow_server is done with ecflow_client
For any communication with the server, the client needs to know the machine
where the server is running and the port on the server. There can be multiple
servers running on the same machine, each with unique port numbers.
This tutorial will show examples of using the client via the shell and in a Python script.
Client Shell Interface
For a full list of available commands type:
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ecflow_client --help |
The ecflow_client uses the following method of determining the host and port:
Default host and port is localhost:3141
These defaults are overridden by ECF_NODE HOST and ECF_PORT environment variables
- This can be further overridden by using –port and –host optionsand can be used for any of shell level command shown with –help option.For example to ping a server on the command line we can use:
Code Block language bash ecflow_client --ping --host=machineX<host> --port=4141<port>
Client Python Interface
The python interface uses the same algorithm for determining the host and port,
and allows the host and port to be set explicitly. See class ecflow.Client
This is shown by the following python example:
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import ecflow |
try: # When no arguments specified uses ECF_ |
HOST and/or ECF_PORT, # otherwise defaults to localhost:3141 ci = ecflow.Client() # inherit from shell variables ci.ping() # Explicitly set host and port using the same client # For alternative argument list see ecflow.Client.set_host_port() ci.set_host_port("machineX:4141") # actually set the host and port (change to your host and port) ci.ping() # Create a new client, Explicitly setting host and port. # For alternative argument list see ecflow.Client ci = ecflow.Client("oetzi:3444") # another server ci.ping() # Ping inlined ecflow.Client("polonius:4266").ping() except RuntimeError |
as e: print |
("ping failed: ", |
str(e) |
) |
What to do
interface, then set ECF_NODE HOST and ECF_PORT environment variables.
It should be noted that, if the server was started with ecf ecflow_start.sh script
then the default “localhost:3141” will be incorrect.
e.g. in KSH
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export ECF_HOST=<HOST> # as given when setting up ecflow server
export ECF_PORT=<PORT> # as given when setting up ecflow server |
netstat can be used to determine the port number If the server was started on your local machine, use netstat to determine the port number.
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netstat -lnptu | grep ecflow_server |
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