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       et - Main API of the Event Trace (ET) application


       Interface module for the Event Trace (ET) application


       trace_me(DetailLevel, From, To, Label, Contents) -> hopefully_traced


                 DetailLevel = integer(X) when X =< 0, X >= 100
                 From = actor()
                 To = actor()
                 Label = atom() | string() | term()
                 Contents = [{Key, Value}] | term()
                 actor() = term()

              A function that is intended to be traced.

              This function is intended to be invoked at strategic places in user applications in
              order to enable simplified tracing. The functions are  extremely  light  weight  as
              they  do  nothing  besides  returning an atom. The functions are designed for being
              traced. The global tracing mechanism in et_collector  defaults  to  set  its  trace
              pattern to these functions.

              The  label  is intended to provide a brief summary of the event. It is preferred to
              use an atom but a string would also do.

              The contents can be any term but in order to simplify post processing of the traced
              events, a plain list of {Key, Value} tuples is preferred.

              Some  events,  such  as  messages,  are  directed from some actor to another. Other
              events (termed actions) may be undirected and only have one actor.

       trace_me(DetailLevel, FromTo, Label, Contents) -> hopefully_traced

              Invokes et:trace_me/5 with both From and To set to FromTo.

       phone_home(DetailLevel, FromTo, Label, Contents) -> hopefully_traced
       phone_home(DetailLevel, From, To, Label, Contents) -> hopefully_traced

              These functions sends a signal to the outer space and the caller hopes that someone
              is   listening.  In  other  words,  they  invoke  et:trace_me/4  and  et:trace_me/5

       report_event(DetailLevel, FromTo, Label, Contents) -> hopefully_traced
       report_event(DetailLevel, From, To, Label, Contents) -> hopefully_traced

              Deprecated functions which for the time being are kept for backwards compatibility.
              Invokes et:trace_me/4 and et:trace_me/5 respectively.