Hi, Dne 24.10.2013 10:09, Harriv napsal(a): > > > I got forward: > > If I STOP the trace session started from FDB with fbtracemgr.exe, > svc.readline() will return all(?) trace data stored in some buffer. So > what I really am looking for is how get "interactive" mode?
Well, it seem that you have misunderstood how trace in Firbeird works then :) There so no "interactive" mode. Once trace session is started, Firebird engine accumulates trace report strings in internal buffer (if there are any according to your trace config) until it's full (then no more trace data is accumulated until client empties it enough for new data via isc_service_query call). Client calls isc_service_query API call that BLOCKs, i.e. returns only when there is any content in engine's output buffer and trace session is active. So if there is nothing to return, client is "frozen". So handling trace sessions typically require two processes or threads, one that starts the session, reads output in loop and does something with it (prints out, store to file, whatever) and second one to end the session. You can also terminate the trace session in "reading" process/thread, for example using timer or other way to interrupt it and tell it to stop fetching trace output, but that will react *only* when it's outside of isc_service_query call, hence two processes is more "interactive" or better "resposive". best regards Pavel Cisar IBPhoenix
