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Execution Order seems not to work. Any wait neccessary...?

Execution Order seems not to work after "Execute Program". "Execute Program" (PHP Script inside) do two things. I have added a "sleep(1)" at the end of the PHP Script (wait 1 second). But this has no effect.

<?php
 // echo 'start php';

 $aData = array();
 $sData = null;

 $sData = file_get_contents('M:/Scannen-AS/rapidminer-php-input.csv');
 $aData = explode(PHP_EOL,$sData);

 asort($aData);

 $sData = implode(PHP_EOL,$aData); 
 // fwrite(STDOUT, $sData);

 file_put_contents('M:/Scannen-AS/rapidminer-php-output.csv',$sData);

 sleep(1);

?>

a) read a files and reorder it

b) write a new file with the ordered data

After this "Load File" give me an Error. But the missing file exist. If I run the process a second time (without delete the work files directory) the process seems to work.

Pic. Working file directory

Any help?

Thanks!

Thomas

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Accepted answers

MartinLiebig

Hi @thomas_wiedmann,

as a side node. I can recommend the Delay and the Subprocess operators to enforce execution order.

Best,

Martin

All comments

Thomas_Ott

Ok, I think this is related to a path issue.

Windows has this type of directory structure M:\Path\to\file, whereas the error is saying it can't find M:/Path/to/file. Does the file reside on a windows machine but it's pathed differently?

thomas_wiedmann

@Thomas_Ott

Okay, I will check this again, but like I wrote. If I run the process a second time "Open File" found the "old" file (rapidminer-php-output.csv) without any change of directory separator "\" or "/" . So I think, this is not the reason...

Thanks!

Thomas

thomas_wiedmann

Ok, I have chanced "\" to "/" inside the "Open File". But I get the same error

RapidMiner change "../.../.." to "..\...\.." inside the error message.

Thanks!

Thomas

RapidMiner3.JPG

Thomas_Ott

Hmm, that is interesting. So if you opened the saved file and try and run it, it crashes. The second time you run it, it works? If that's the case, it might be a bug of sorts.

MartinLiebig

Hi @thomas_wiedmann,

as a side node. I can recommend the Delay and the Subprocess operators to enforce execution order.

Best,

Martin

thomas_wiedmann

Hi @Thomas_Ott

If I locked the "old" rapidminer-php-output.csv the PHP Script inside "Execute Programm" can't write.

Thanks!

Thomas

Edin_Klapic

Hi @thomas_wiedmann,

Attached is a screenshot what @mschmitz was talking about.

This way you can omit 'sleep' in your PHP script. The Delay value is in ms. And by moving Open File and Read CSV into a Subprocess you can easily enforce the execution order.

Hope this helps,

Edin

image.png

thomas_wiedmann

@Thomas_Ott

@mschmitz

Yes, this seems to work, I will check how long the shortes "Delay" is neccessary

Thanks!

Thomas

RapidMiner3.jpg

Edin_Klapic

Hi @thomas_wiedmann,

is there any reason why you have a subprocess *and* Open file & Read CSV?
The proposed solution uses the Subprocess Operator only because it has an input port and therefore can be connected.

Best,

Edin

thomas_wiedmann

@Edin_Klapic

Yes, I found no way get the piped data inside PHP like described here:

https://community.rapidminer.com/t5/Getting-Started-Forum/Looking-for-a-sample-to-execute-PHP-using-Execute-Program/m-p/46575#M1850

So I decide to use real files to pipe data thru "Execute Program" (PHP Script). PHP found no data on STDIN and waits forever.

Maybe I make a mistake using PIPE, but I did'nt found it.

rem --- rapidminer-start-php.bat ---
d:
cd d:\wiedmann\tools\php-5.6.13-Win32-VC11-x86
php rapidminer.php
exit

<?php
 // echo 'start php';

 $aData = array();
 $sData = null;

 while($f = fgets(STDIN)){
   $aData = $f;
 }

 $sData = implode(PHP_EOL,$aData); 
 file_put_contents('M:/Scannen-AS/rapidminer-php-log-input.csv',$sData); 

 asort($aData);

 $sData = implode(PHP_EOL,$aData); 
 file_put_contents('M:/Scannen-AS/rapidminer-php-log-output.csv',$sData);  

 fwrite(STDOUT, $sData);

 // echo 'end php';

?>

Regards,

Thomas