attpcdaq.daq.models.ECCServer._get_transition

classmethod ECCServer._get_transition(client, current_state, target_state)[source]

Look up the appropriate SOAP request to change the ECC server from one state to another.

Given the current_state and the target_state, this will either return the correct callable to make the transition, or it will raise an exception.

Parameters:
  • client (EccClient) – The SOAP client. One of its methods will be returned.
  • current_state (int) – The current state of the ECC state machine.
  • target_state (int) – The desired final state of the ECC state machine.
Returns:

The function corresponding to the requested transition. This can then be called with the appropriate arguments to change the ECC server’s state.
Return type:

function
Raises:

ValueError – If the requested states differ by more than one transition, or if no transition is needed.