[julia-users] Re: Redirecting output julia (log to file)

[bernhard]

This works perfectly. Thank you. Also the MS website (which is linked on 
the site you 
referred) 
http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/redirection.mspx?mfr=true
 
is very good.

Am Dienstag, 23. Juni 2015 09:44:46 UTC+2 schrieb Avik Sengupta:
>
> From a batch file, you can redirect the output using ">" . See 
> http://blog.crankybit.com/redirecting-output-to-a-file-in-windows-batch-scripts/
>  
> for some details. 
>
> Alternatively, if you control how the output is generated, you can use the 
> Logging.jl package to write them to file in reasonably flexible way. 
>
> Regards
> -
> Avik
>
> On Tuesday, 23 June 2015 07:55:54 UTC+1, bernhard wrote:
>>
>> Hi all
>>
>> I am invoking a Julia process from an external program (say a Java 
>> script, Windows or any program). 
>> Julia starts, does some calculations and closes again. While Julia runs I 
>> can of course see the REPL which shows me some logging and evaluations.
>>
>> I now want to set up a web service (REST or similar) where people can 
>> upload data, start of a model, and download results. For this I want to 
>> have a log file which shows the same or similar output which the REPL 
>> (=Julia session) displays. I understand that the REPL is does much more 
>> than just displaying stdout and stderr (this is why is said similar before).
>>
>> Leah Hanson is describing 
>>   (Base.|> 
>> ) which works perfectly for me. But this only works if I use Julia to 
>> start another Julia session. In my case I want to start Julia from windows 
>> (a *.bat file) or any other software. How can I achieve the same result?
>>
>> I am aware of redirect_stdout and redirect_stderr. This does not work 
>> properly for me, as the program might run for several minutes, and it seems 
>> to me that output is only written after I flush or close the stream. But I 
>> want to see the progress in the log file (just as the REPL does) while my 
>> code runs. It would be tedious to add "flush"  everywhere in my code where 
>> I have a print command.
>>
>> Is there a way to achieve this? 
>>
>> As mentioned above I can invoke a julia session which starts another 
>> julia session with the actual code:
>> (st,pr) = open(`$(juliaExecutable) $(juliaProgram) $(arguments)` |> 
>> logFilename)
>> Is there a way to achieve the same result without the intermediate julia 
>> session?
>>
>> Thanks
>> Bernhard
>>
>

[julia-users] Re: Redirecting output julia (log to file)

[Avik Sengupta]

>From a batch file, you can redirect the output using ">" . 
See 
http://blog.crankybit.com/redirecting-output-to-a-file-in-windows-batch-scripts/
 
for some details. 

Alternatively, if you control how the output is generated, you can use the 
Logging.jl package to write them to file in reasonably flexible way. 

Regards
-
Avik

On Tuesday, 23 June 2015 07:55:54 UTC+1, bernhard wrote:
>
> Hi all
>
> I am invoking a Julia process from an external program (say a Java script, 
> Windows or any program). 
> Julia starts, does some calculations and closes again. While Julia runs I 
> can of course see the REPL which shows me some logging and evaluations.
>
> I now want to set up a web service (REST or similar) where people can 
> upload data, start of a model, and download results. For this I want to 
> have a log file which shows the same or similar output which the REPL 
> (=Julia session) displays. I understand that the REPL is does much more 
> than just displaying stdout and stderr (this is why is said similar before).
>
> Leah Hanson is describing 
>   (Base.|> 
> ) which works perfectly for me. But this only works if I use Julia to 
> start another Julia session. In my case I want to start Julia from windows 
> (a *.bat file) or any other software. How can I achieve the same result?
>
> I am aware of redirect_stdout and redirect_stderr. This does not work 
> properly for me, as the program might run for several minutes, and it seems 
> to me that output is only written after I flush or close the stream. But I 
> want to see the progress in the log file (just as the REPL does) while my 
> code runs. It would be tedious to add "flush"  everywhere in my code where 
> I have a print command.
>
> Is there a way to achieve this? 
>
> As mentioned above I can invoke a julia session which starts another julia 
> session with the actual code:
> (st,pr) = open(`$(juliaExecutable) $(juliaProgram) $(arguments)` |> 
> logFilename)
> Is there a way to achieve the same result without the intermediate julia 
> session?
>
> Thanks
> Bernhard
>