output is not always valid ttl

[majidaldo]

The default logging goes to stdout. If warnings are produced in the process, then the output is not valid ttl.

Possible solutions:

• default to logging to a file
• and/or "wapper" script takes file paths for the log and/or validation/inference.

[afs]

Default to have logging output go to stderr.

[majidaldo]

Default to have logging output go to stderr.

well, for (actual) errors from the log. warnings would be ok. but are there "info" log messages?

[afs]

Looks to me like INFO goes to the same logger.

[HolgerKnublauch]

FMI: Which parts of my code base actually produce logging messages?

[afs]

@majidaldo

but are there "info" log messages?

is that speculation or have you seen INFO messages?

[afs]

FMI: Which parts of my code base actually produce logging messages?

Searching for an import of org.slf4j.Logger should find the possible places.

[majidaldo]

@majidaldo

but are there "info" log messages?

is that speculation or have you seen INFO messages?

speculation.

[majidaldo]

regardless, the logging output should distinguish b/w errors (program must stop) and non-errors (warnings and info).

[HolgerKnublauch]

It would help if you could provide some details or even a PR. What is the problem specifically?

[WouterLubbers]

Example of a warning, produced by executing 'shaclinfer'. The SHACL API tries to read owl:imports objects in the input files, but cannot find them.

[majidaldo]

Example of a warning, produced by executing 'shaclinfer'. The SHACL API tries to read owl:imports objects in the input files, but cannot find them.

thanks.

in this case it shouldn't even be a warning. it should fail and the program should exit with a non-zero code. i get around this with my own program wrapper where i fail the program if there is any exception message in the output. not ideal.

[rmfranken]

I would disagree that the program should exit - as the error indicates - this is a "WARN". A warning should not cause a failure of the program in my opinion. Isn't it a bit nuclear to stop and fail the whole program because an external ontology could not be imported?

[majidaldo]

I would disagree that the program should exit - as the error indicates - this is a "WARN". A warning should not cause a failure of the program in my opinion. Isn't it a bit nuclear to stop and fail the whole program because an external ontology could not be imported?

I agree that warnings should not exit.

But Program output should be deterministic. Same output for same input. Here inferencing and validation depends on imported ontologies.

[afs]

OntDocumentManager.setReadFailureHandler allows for different failure handling choices.

[HolgerKnublauch]

Thanks, happy to take PRs from anyone...