doors batch mode hangs if I call it from web service

Hello,

at the moment I try to call the doors client in batch mode from a Java web service. If the service sends the command, the doors console windows appears and then hangs without any output forever.

The doors installation (client / server) is in version :  9.6.0.0

Here the source code I'm using for this:

String doors = "\"C:\\Program Files\\IBM\\Rational\\DOORS\\9.6\\bin\\doors.exe\"";
String server = "36323@wsvsdoors01";
String user = "myUsername";
String pwd = "myPassword";
String script = "C:\\Daten\\SOA\\Solutions\\DOORS\\DXLScripts\\listAllProjects.dxl";

String[] cmd = new String[9];
cmd[0] = doors;
cmd[1] = "-b";
cmd[2] = script;
cmd[3] = "-d";
cmd[4] = server;
cmd[5] = "-u";
cmd[6] = user;
cmd[7] = "-P";
cmd[8] = pwd;

Process p = null;
try {
 p = Runtime.getRuntime().exec(cmd);

 InputStream stderr = p.getErrorStream();
 InputStreamReader isr = new InputStreamReader(stderr);
 BufferedReader br = new BufferedReader(isr);
 
 String line = null;
 while( (line = br.readLine()) != null) {
  System.out.println("line: " + line);
 }
 
 int exitVal = p.waitFor();
}

I also tried to do this with the complete command as a single string and using the ProcessBuilder. The result is always the same.

If I execute this command line from a windows prompt the client starts and executes the script without a problem.

Maybe someone has experience with this can give me a good hint.

Thanks in advance.

Regards,

Andre

Re: doors batch mode hangs if I call it from web service
Mathias Mamsch - Tue Aug 22 04:34:05 EDT 2017

You need to pass the --nowait parameter ("-w") to avoid the DOORS process pausing after outputting in stdout. See also similar posts on the forum. Regards, Mathias

Re: doors batch mode hangs if I call it from web service
Azielinski - Tue Aug 22 04:58:08 EDT 2017

Thanks for the quick answer.

Now the client window shortly appears and then close, but I would expect to get some output from this process. At least the stuff which I print in the DXL script, or an error message if the execution failed.

Regards,

Andre

Re: doors batch mode hangs if I call it from web service
Mathias Mamsch - Tue Aug 22 05:10:33 EDT 2017

Read the other posts about output redirection with DOORS. The "print" perm does not output to stdout. Instead you would need to use cout. 

See here: 

https://www.ibm.com/developerworks/community/forums/html/topic?id=77777777-0000-0000-0000-000014817346&ps=25

or here: 

https://www.ibm.com/developerworks/community/forums/html/topic?id=77777777-0000-0000-0000-000014528886&ps=25

or other posts. Search for "cout batch".

Regards, Mathias

Re: doors batch mode hangs if I call it from web service
Mathias Mamsch - Tue Aug 22 05:12:19 EDT 2017

I would not use stdout. Instead I would pass in a filename to the DXL process to write the results to and read that file after the process ends. This makes sure you only get what you write. Output inside a batch script should be considered an error. Imagine someone puts a print statement inside a library or some dxl attribute prints stuff, which will completely mess up your output. 

Regards, Mathias

Re: doors batch mode hangs if I call it from web service
Azielinski - Tue Aug 22 05:49:53 EDT 2017

Thanks Mathias for your help.

I could manage to get the output via cout. I will continue with this way. Maybe I will come back to your suggestion with the file handling.

Regards,

Andre