Basic System Find Example

This sample invokes and displays the results of a "system find" remote command via the ePO DXL service. The results of the find command are displayed in JSON format.

Prerequisites

  • The samples configuration step has been completed (see Samples Configuration)
  • An ePO DXL service is running and available on the fabric. If version 5.0 or later of the DXL ePO extensions are installed on your ePO server, an ePO DXL service should already be running on the fabric. If you are using an earlier version of the DXL ePO extensions, you can use the ePO DXL Python Service.
  • The client is authorized to invoke the ePO DXL Service, and the user that is connecting to the ePO server (within the ePO DXL service) has permission to execute the "system find" remote command (see Authorization).

Setup

Modify the example to include the unique identifier associated with the ePO to invoke the remote command on.

For more information on the ePO unique identifier, refer to the following:

For example:

EPO_UNIQUE_ID = "epo1"

If only one ePO server is connected to the DXL fabric this constant can be set to None (the client will automatically determine the ePO's unique identifier).

Modify the example to include the search text for the system find command.

For example:

SEARCH_TEXT = "broker"

Running

To run this sample execute the sample/basic/basic_system_find_example.py script as follows:

python sample/basic/basic_system_find_example.py

The output should appear similar to the following:

[
    {
        "EPOBranchNode.AutoID": 7,
        "EPOComputerProperties.CPUSerialNum": "N/A",
        "EPOComputerProperties.CPUSpeed": 2794,
        "EPOComputerProperties.CPUType": "Intel(R) Core(TM) i7-4980HQ CPU @ 2.80GHz",
        "EPOComputerProperties.ComputerName": "broker1",
        "EPOComputerProperties.DefaultLangID": "0409",
        "EPOComputerProperties.Description": null,

        ...
    }
]

The properties for each system found will be displayed.

Details

The majority of the sample code is shown below:

# The ePO unique identifier
EPO_UNIQUE_ID = None

# The search text
SEARCH_TEXT = "broker"

# Create the client
with DxlClient(config) as client:

    # Connect to the fabric
    client.connect()

    # Create the ePO client
    epo_client = EpoClient(client, EPO_UNIQUE_ID)

    # Run the system find command
    res = epo_client.run_command("system.find", {"searchText": SEARCH_TEXT})

    # Load find result into list
    res_list = MessageUtils.json_to_dict(res)

    # Display the results
    print(MessageUtils.dict_to_json(res_list, pretty_print=True))

Once a connection is established to the DXL fabric, a dxlepoclient.client.EpoClient instance is created which will be used to invoke remote commands on the ePO server. The unique identifier of the ePO server to invoke remote commands on is specified as an argument to the client constructor. In this particular case, a value of None is specified which triggers the client to automatically determine the ePO server's unique identifier. This will not work if multiple ePO servers are connected to the fabric (an exception will be raised).

Next, the dxlepoclient.client.EpoClient.run_command() method is invoked with a searchText parameter that is specified with the value of broker.

Finally, the JSON response text is loaded into a Python list, formatted, and displayed to the screen.