The run start time needs to have a precision of better than the nearest second

[Russell Taylor]

At the moment, the run_start/start_time property for a run is only stored to the nearest second (the truncation happens in LogManager::setStartAndEndTime). We need it to keep the original precision as our logs do so and this introduces an artificial offset.

Update the end time in the same way.

[Russell Taylor]

Re #6270. Improve precision of run_start/end workspace log values.

Previously the precision of these would be the nearest second as the setting went via the DateAndTime::toISO8601String() method, which truncated the time even if it had a better precision than that (as the SNS files do). This then caused some oddities when viewing logs because they do preserve the incoming precision.

DateAndTime::toISO8601String() now preserves the nanosecond precision of the underlying DateAndTime class.

Changeset: 0a2679ca5aa663ccc4d57663fd0f596dd0c5e115

[Russell Taylor]

Re #6270. Improve precision of run_start/end workspace log values.

Previously the precision of these would be the nearest second as the setting went via the DateAndTime::toISO8601String() method, which truncated the time even if it had a better precision than that (as the SNS files do). This then caused some oddities when viewing logs because they do preserve the incoming precision.

DateAndTime::toISO8601String() now preserves the nanosecond precision of the underlying DateAndTime class.

Changeset: 0a2679ca5aa663ccc4d57663fd0f596dd0c5e115

[Russell Taylor]

Tester: Most existing data files don't provide a start time with precision better than a second anyway, though you should probably load a couple of those to check all's well. SNS pre-nexus files do, as you can see from the commit, as do ADARA files, of which the only one in the repository at present is HYSA_2411_monitors.nxs.h5 (use LoadNexusMonitors on it). To check these properties, load the files, show the logs and look at the start_time/end_time/run_start entries.

[Michael Reuter]

This ticket has been cherry picked.

[Russell Taylor]

Re #6270. Improve precision of run_start/end workspace log values.

Previously the precision of these would be the nearest second as the setting went via the DateAndTime::toISO8601String() method, which truncated the time even if it had a better precision than that (as the SNS files do). This then caused some oddities when viewing logs because they do preserve the incoming precision.

DateAndTime::toISO8601String() now preserves the nanosecond precision of the underlying DateAndTime class. (cherry picked from commit 0a2679ca5aa663ccc4d57663fd0f596dd0c5e115)

Changeset: 830f6b85a8bb704455b96c1f81a3f7e7cf78fb49

[Michael Reuter]

This seems to be working correctly.

[Stuart Campbell]

This ticket has been transferred to github issue ​7116