Re: [tcljava-user] HELP...Calling TCL scripts from a Java program

[D. J. H. <dha...@mi...>]

The fundamental problem here is that Runtime.exec(...) is a very
primitive interface and hard to use correctly, especially to capture
large chunks of output from stdout/stderr or input large chunks
of data to stdin.

The following article on JavaWorld provides a good example at the end:

http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html

I don't know if this "fix" has yet been applied to Jacl's exec, 
per Mo's reply, but I was intending to do so someday if someone
hasn't already...

In addition, you should really use a BufferedReader(InputStreamReader())
chain around the exec'd process output if you want to capture text
lines.
DataInputStream is for binary struct-type and serialized Java object
data, not text.

			-=- D. J.

Tam Huynh wrote:
> I'm trying to execute a Tcl script from a java program using the java
> Runtime class.  However, the script does not execute because my log file is
> never created.  Should i stick to this Runtime class or use something like
> Tcl blend to include a class to call the script.  I'm just trying to find
> the quickest solution to call the script, pass it parameters, and get
> results from the script in return..Am i even calling the script the right
> way?
[ . . . ]
>             Process myProcess = Runtime.getRuntime().exec(cmd, argv);
>             myProcess.waitFor();
>             System.out.println("Process exit code is: " +
> myProcess.exitValue());
> 
>             DataInputStream in = new
> DataInputStream(myProcess.getInputStream());
[ . . . ]