I am trying to develop a GUI application that creates and deletes elastic Starcluster clusters in Amazon Elastic Compute 2. So far I have managed to create and use these clusters from the graphic application, but I am running into a problem when I try to delete the clusters. The following is the method I have used to insert commands into the console (from my application):
Runtime rt = Runtime.getRuntimne();
Process proc = rt.exec("command",null,dir);
The issue is that the system asks me for a yes/no confirmation which I cannot pass through making use of the method used in my application. So far I tried the following:
Runtime rt = Runtime.getRuntimne();
Process proc = rt.exec("y",null,dir); //y for yes
But the system keeps waiting for an answer, ignoring the command introduced in the application. The following is the log of the actual application requesting a confirmation:
ubuntu@ip-xxx-xxx-xxx-xxx:~$ starcluster terminate myCluster
StarCluster - (http://star.mit.edu/cluster) (v. 0.95.5)
Software Tools for Academics and Researchers (STAR)
Please submit bug reports to starcluster@mit.edu
Terminate EBS cluster myCluster(y/n)?
I would appreciate any thoughts or ideas about the matter. Feel free to ask more information if you consider it necessary to give an appropiate answer.
You need to write your "y" to the process stdin stream.
Check the answer of Berry Tsakala given to that question: java: how to both read and write to & from process thru pipe (stdin/stdout)