I was trying to get an example to work with the new ProcessHandle API. My goal
was to wait on another process (Spotify) to terminate before printing something
to the console:
ProcessHandle handle =
ProcessHandle.allProcesses()
.filter(h -> h.info().commandLine().map(cmd ->
cmd.contains("Spotify")).orElse(false))
.findFirst()
.orElseThrow(() -> new IllegalArgumentException("No matching handle
found"));
System.out.println(handle.info());
ProcessHandle completed = handle.onExit().get();
System.out.println(completed.isAlive());
However this code doesn't wait on `handle` to be terminated, as the JavaDoc of
onExit led me to believe: "Calling onExit().get() waits for the process to
terminate and returns the ProcessHandle.". What I expected: the get() call
blocks until I terminate the Spotify process. Instead, it runs to completion
and prints true for the `isAlive` call in the end. Am I missing something?
Env: Java(TM) SE Runtime Environment (build
9-ea+157-jigsaw-nightly-h6122-20170221) on MacOS.
Also, first time posting to this list, I hope this is the right avenue for
these questions.
Sander