private static void Pause(String description) throws Exception {
Singletons.Log.Debug(
"Pausing for "
+ Settings.PAUSE_SECONDS
+ " seconds: "
+ description
+ ". Other threads may be processing these tasks.");
MiscUtilities.Sleep(Settings.PAUSE_SECONDS * 1000);
Singletons.Log.Debug("Done with pause: " + description + ".");
}
/**
* Executes multiple callable objects in a multithreaded fashion
*
* @return Objects that are returned from each _callable object
* @throws Exception
*/
public ArrayList Execute() throws Exception {
if (_callables == null || _callables.size() == 0) return new ArrayList();
Singletons.Log.Debug(
"Attempting to share execution across "
+ _numThreads
+ " threads for "
+ _description
+ ".");
// Initialize the service
// ExecutorService service = Executors.newFixedThreadPool(_numThreads);
ExecutorService service = new TimeoutThreadPoolExecutor(_numThreads);
try {
ArrayList<Future<Object>> futures = new ArrayList<Future<Object>>();
// Submit each task to a queue to be executed
for (Callable<Object> callable : _callables) futures.add(service.submit(callable));
ArrayList results = new ArrayList();
// Parse through the results of the execution
for (Future<Object> future : futures) {
Object result = future.get();
if (result != null) results.add(result);
}
return results;
} catch (Exception ex) {
throw ex;
} finally {
// Very important to shut down the service
service.shutdown();
}
}