CODEWITHSUNDEEP
javaprocess
ivan
ivan

Reputation: 297

Java - Problems with reading from process output

My OS is Windows 8.1 64 bit I need to read process output, but if it works more than 5 hours, I should destroy the process. So, there are two ways: 1) process works < 5 hours and it ends by itself; 2) it if works >= 5 hours, after that time I destroy it. I had two variants:

1.

ProcessBuilder pb = new ProcessBuilder(corePath.getAbsolutePath(), ... );
Process core = pb.start();
if(!core.waitFor(5, TimeUnit.HOURS))
{
    System.out.println("Process destroyed, path " + root.getAbsolutePath());
    core.destroy();
}
String output = IOUtils.toString(core.getInputStream());
return output;

2.

Process core = pb.start();
StringBuilder sb = new StringBuilder();
BufferedReader input = new BufferedReader(new InputStreamReader(core.getInputStream()));
String line;
while(System.currentTimeMillis() < end && (line = input.readLine()) != null)
{
    sb.append(line);
}
input.close();

Problems: 1) program was waiting exactly 5 hours (even if process should be finished in few seconds) 2) program is waiting until the process is end

May someone advise another way to handle this? Thanks

Upvotes: 1

Views: 84

Answers (1)

user4920910
user4920910

Reputation:

I think the problem may be with the BufferedReader. Are you trying to use the BufferedReader to get inptut? If so, use the Scanner class.

Upvotes: 2

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