Filter protocol - RECORD action with START and STOP 

Upon detection of a condition in the filter, several actions relative to recording are available:
  • write the current event to the file.
  • start the recording.
  • stop the recording.

The filter actions relative to recording supply a recording service triggered upon confirmation of independent conditions:

  • Record Start: start of recording if occurrence of selected events.
  • Record: recording of selected events.
  • Record Stop: stop of recording if occurrence of selected events.

The execution of Record Start or Record Stop action can be modified by an additional function:

  • Start Anticipation to anticipate the recording in relation to the event which triggers Record Start
  • Stop Delay to prolong the recording in relation to the event which triggers Record Stop.

Record State

The Record State (ON/OFF) is used to validate all of the Record actions and can be modified by the Record Start and Record Stop actions:

  • ON/OFF initialization by the Initial state parameter of the filter
  • ON transition by the Record Start action
  • OFF transition by the Record Stop action.

The basic Record action is carried out if the one of conditions is fulfilled:

  • the current Record State is in the ON state,
  • the Start Anticipation function is active,
  • the Stop Delay function is active.

Sequencing record actions

The application order of various Record actions to the event stream to be recorded is the one specified in the list of filter actions pertaining to the Record type.

  • If the actions are executed in the following order: Record Start / Record / Record Stop, the Stop action is executed after having recorded the event used for this triggering.
  • If the actions are executed in the following order: Record Start / Record Stop / Record, the Stop action is executed before having recorded the event used for this triggering. This event is therefore not recorded.

 


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updated:  27-Feb-04