Re: EXECUTE STARCLUSTER FROM JAVA CODE

From: Steve Darnell <no email>
Date: Thu, 30 Apr 2015 12:41:28 +0000

Shouldn't you be using output streams and readers rather than input ones?

Sent from my iPhone

> On Apr 30, 2015, at 4:22 AM, Andrea La Rizza <andrea.larizza_at_alef.it> wrote:
>
>
> Hi Steve,
>
> thank you for your replay. I tried with both ProcessBuilder and Runtime. The output is handled as follow:
>
> BufferedReader bfr = new BufferedReader(new InputStreamReader(pr.getInputStream()));
> String line = "";
> while((line = bfr.readLine()) != null) {
> log.append(line+"\n");
>
> The console does not show any error or message, but i do not receive any output and if i go on aws console nothing have been triggered!
> Il 27/04/15 19:24, Steve Darnell ha scritto:
>> Hi Andrea,
>>
>> 1. ProcessBuilder is the preferred mechanism for running an external process in Java (introduced in 1.5).
>> 2. External process tend to fail/hang if you do not explicitly handle the standard output/error streams.
>>
>> http://docs.oracle.com/javase/7/docs/api/java/lang/ProcessBuilder.html
>>
>> ~Steve
>>
>> -----Original Message-----
>> From: starcluster-bounces_at_mit.edu [mailto:starcluster-bounces_at_mit.edu] On Behalf Of Andrea La Rizza
>> Sent: Monday, April 27, 2015 9:36 AM
>> To: starcluster_at_mit.edu
>> Subject: [StarCluster] EXECUTE STARCLUSTER FROM JAVA CODE
>>
>> Hi All,
>> I'm creating a complex project, and what I want to do is to launch the command "starclster start my custer" by pressing a button in a java swing interface.
>> I have created a script called run with the command inside, and what I do in my java cose is:
>>
>> String[] cmd = new String[2];
>> cmd[0] = "sh";
>> cmd[1] = "run";
>> // create runtime to execute external command
>> Runtime rt = Runtime.getRuntime();
>> //Process pr = rt.exec("/path/to/script/run");
>> Process pr = rt.exec(cmd);
>>
>> If I run the script from shall it works, i i press the button nothing happens. Is there someone that have done something similar? Thanks.
>> _______________________________________________
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>
>
Received on Thu Apr 30 2015 - 08:45:14 EDT