public void run() {
try {
if (null == logger) {
throw new NullPointerException("must call setLogger");
}
logger.info("starting");
monitor();
yield();
} catch (Exception e) {
if (e instanceof ExecutionException) {
logger.logException("fatal execution error", e.getCause());
} else {
logger.logException("fatal error", e);
}
// stop the world
System.exit(-1);
} finally {
pool.shutdownNow();
running = false;
logger.info(
"exiting after "
+ timer.getEventCount()
+ "/"
+ taskCount
+ ", "
+ timer.getProgressMessage());
}
}
/** @throws ExecutionException */
protected void monitor() throws ExecutionException {
int displayMillis = DISPLAY_MILLIS;
int futureMillis = FUTURE_MILLIS;
int sleepMillis = SLEEP_MILLIS;
Future<TimedEvent[]> future = null;
/* Initialize lastFutureMillis so that we do not get
* warnings on slow queue startup.
*/
long currentMillis = System.currentTimeMillis();
long lastDisplayMillis = 0;
long lastFutureMillis = currentMillis;
TimedEvent[] lastEvent = null;
logger.finest(
"looping every "
+ sleepMillis
+ ", core="
+ pool.getCorePoolSize()
+ ", active="
+ pool.getActiveCount()
+ ", tasks="
+ taskCount);
timer = new Timer();
// run until all futures have been checked
do {
// try to avoid thread starvation
yield();
// check completed tasks
// sometimes this goes so fast that we never leave the loop,
// so progress is never displayed... so limit the number of loops.
do {
try {
future = completionService.poll(SLEEP_MILLIS, TimeUnit.MILLISECONDS);
if (null != future) {
// record result, or throw exception
lastFutureMillis = System.currentTimeMillis();
try {
lastEvent = future.get();
if (null == lastEvent) {
throw new FatalException("unexpected null event");
}
for (int i = 0; i < lastEvent.length; i++) {
// discard events to reduce memory utilization
if (null != lastEvent[i]) {
timer.add(lastEvent[i], false);
}
}
} catch (ExecutionException e) {
if (fatalErrors) {
throw e;
}
Throwable cause = e.getCause();
if (null != cause && cause instanceof FatalException) {
throw (FatalException) cause;
}
logger.logException("non-fatal", e);
timer.incrementEventCount(false);
}
}
} catch (InterruptedException e) {
// reset interrupt status and continue
Thread.interrupted();
logger.logException("interrupted in poll() or get()", e);
continue;
}
currentMillis = System.currentTimeMillis();
if (currentMillis - lastDisplayMillis > displayMillis) {
lastDisplayMillis = currentMillis;
logger.finer(
"thread count: core="
+ pool.getCorePoolSize()
+ ", active="
+ pool.getActiveCount()
+ ", tasks="
+ taskCount);
if (null != lastEvent) {
logger.info(
""
+ timer.getEventCount()
+ "/"
+ taskCount
+ ", "
+ timer.getProgressMessage(false)
+ ", "
+ lastEvent[0].getDescription());
if (config.doPrintCurrRate()) {
String currMsg = timer.getCurrProgressMessage();
if (currMsg != null) logger.info(currMsg);
}
}
}
} while (null != future);
logger.finer(
"running = "
+ running
+ ", terminated = "
+ pool.isTerminated()
+ ", last future = "
+ lastFutureMillis);
// currentMillis has already been set recently
if (currentMillis - lastFutureMillis > futureMillis) {
logger.warning("no futures received in over " + futureMillis + " ms");
break;
}
} while (running && !pool.isTerminated());
// NB - caller will set running to false to ensure exit
}