Exploring Java 9 by Fu Cheng

Author:Fu Cheng
Language: eng
Format: epub
Publisher: Apress, Berkeley, CA

public ProcessHandle start() throws IOException {

final ProcessBuilder processBuilder = new ProcessBuilder("top")

.inheritIO();

return processBuilder.start().toHandle();

}

public void waitFor(final ProcessHandle processHandle) {

final CountDownLatch latch = new CountDownLatch(1);

processHandle.onExit().whenCompleteAsync((handle, throwable) -> {

if (throwable == null) {

System.out.println(handle.pid());

} else {

throwable.printStackTrace();

}

latch.countDown();

});

final Thread shutdownThread = new Thread(() -> {

try {

Thread.sleep(1000);

} catch (final InterruptedException e) {

e.printStackTrace();

}

if (processHandle.supportsNormalTermination()) {

processHandle.destroy();

} else {

processHandle.destroyForcibly();

}

});

shutdownThread.start();

try {

shutdownThread.join();

latch.await();

} catch (final InterruptedException e) {

e.printStackTrace();

}

}

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