I tested it & wrote the following code
Process p;
try {
p = Runtime.getRuntime().exec("appcfg.cmd --no_cookies update
..\\HelloGAE\\war");
String line;
OutputStream outputStream = p.getOutputStream();
PrintStream printStream = new PrintStream(outputStream);
printStream.println("[email protected]");
printStream.flush();
printStream.println("xxxx");
printStream.flush();
printStream.close();
BufferedReader input = new BufferedReader(new InputStreamReader(p.
getInputStream()));
while((line=input.readLine()) != null){
System.out.println(line);
}
input.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
and the o/p is as the following
Beginning interaction for server default...
Email: Password for [email protected]:
java.lang.NullPointerException
Unable to update app: null
this means that the email is read, while the password is not read, because
it throws Null pointer Exception.
so do u have a solution for this problem.
On Friday, June 28, 2013 5:27:56 PM UTC+2, Vinny P wrote:
>
> On Friday, June 28, 2013 4:42:22 AM UTC-5, [email protected] wrote:
>
>> many thanks. I did as u told me.
>> and now I succeed in running appcfg using Runtime class. however, after
>> the appcfg.cmd is run, it prompt user to enter his Email and Password & I
>> need my java application to give the appcfg the required input (i.e., Email
>> and password). so I don't know how I can do this??
>>
>>
> You need to extract an InputStream and OutputStream from the Runtime
> Process, then use those streams to read and write from/to AppCfg. Here's a
> code example: http://stackoverflow.com/a/7715334 . Basically you extract
> a Process object from Runtime.exec(), then the Process object has access to
> the error, out and in streams (documentation:
> http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Runtime.html ).
>
>
> -----------------
> -Vinny P
> Technology & Media Advisor
> Chicago, IL
>
> App Engine Code Samples: http://www.learntogoogleit.com
>
>
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