/* This is different from threadly's FutureUtils because
* we want logging progress as futures complete...Since
* these futures may take a VERY long time to complete.
* The alternative would be to add runnables to these
* so that we log out at 10% intervals, but that would assume
* that the futures complete mostly in order.
*/
public static void blockTillAllDone(List<Future<?>> futures) {
float doneCount = 0;
int lastReportedDonePercent = 0;
Iterator<Future<?>> it = futures.iterator();
while (it.hasNext()) {
try {
Future<?> f = it.next();
if (!f.isDone() || !it.hasNext()) {
// we take * 10 and / 10 so we can get one additional decimal of accuracy
int donePercent = (int) Math.round((doneCount / futures.size()) * 100 * 10);
if (donePercent != lastReportedDonePercent) {
lastReportedDonePercent = donePercent;
System.out.println("Progress: " + (donePercent / 10.) + "%");
}
f.get();
}
doneCount++;
} catch (InterruptedException e) {
ExceptionUtils.handleException(e);
return; // let thread exit
} catch (ExecutionException e) {
ExceptionUtils.handleException(e);
}
}
}
/**
* Internal tick implementation. Allowing control on if the cancelTick boolean should be reset if
* no tasks are run. Thus allowing for an optimistic attempt to run tasks, while maintaining the
* cancelTick state.
*
* @param exceptionHandler Exception handler implementation to call if any tasks throw an
* exception, or null to have exceptions thrown out of this call
* @param resetCancelTickIfNoTasksRan if {@code true} will reset cancelTick weather tasks ran or
* not, otherwise cancelTick will only be reset if tasks ran
* @return quantity of tasks run during this tick invocation
*/
private int tick(
ExceptionHandlerInterface exceptionHandler, boolean resetCancelTickIfNoTasksRan) {
int tasks = 0;
TaskContainer nextTask;
while ((nextTask = getNextTask(true)) != null && !tickCanceled) {
// call will remove task from queue, or reposition as necessary
try {
nextTask.runTask();
} catch (Throwable t) {
if (exceptionHandler != null) {
exceptionHandler.handleException(t);
} else {
throw ExceptionUtils.makeRuntime(t);
}
}
tasks++;
}
if ((tasks != 0 || resetCancelTickIfNoTasksRan) && tickCanceled) {
// reset for future tick calls
tickCanceled = false;
}
return tasks;
}
@Override
public void run() {
while (!stopped) {
try {
T next = getNext();
acceptor.acceptConsumedItem(next);
} catch (InterruptedException e) {
stop();
} catch (Throwable t) {
ExceptionUtils.handleException(t);
}
}
}
