Java Utililty Methods Thread Executor

List of utility methods to do Thread Executor

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Description

The list of methods to do Thread Executor are organized into topic(s).

Method

voidaddExecutorShutdownHook(final ExecutorService exec)
add Executor Shutdown Hook 
addExecutorShutdownHook(exec, 60, TimeUnit.SECONDS);
voidaddThread(Runnable runnable)
add Thread 
service.execute(runnable);
Callableconvert(Runnable runnable, T result)
Converts the specified Runnable to a Callable returning the specified result. 
return () -> {
    runnable.run();
    return result;
};
intgetActiveHelperInstanceCount(String helperName)
get Active Helper Instance Count 
return ((ThreadPoolExecutor) executorServiceMap.get(helperName)).getActiveCount();
ExecutorServicegetChannelService()
get Channel Service 
return CHANNEL_SERVICE;
MapgetConstantLookup()
get Constant Lookup 
Map<String, String> toRet = new HashMap<>();
toRet.put("java.util.concurrent.BlockingDeque", "BLOCKING_DEQUE");
toRet.put("java.util.concurrent.BlockingQueue", "BLOCKING_QUEUE");
toRet.put("java.util.concurrent.Callable", "CALLABLE");
toRet.put("java.util.concurrent.CompletionService", "COMPLETION_SERVICE");
toRet.put("java.util.concurrent.ConcurrentMap", "CONCURRENT_MAP");
toRet.put("java.util.concurrent.ConcurrentNavigableMap", "CONCURRENT_NAVIGABLE_MAP");
toRet.put("java.util.concurrent.Delayed", "DELAYED");
...
ExecutorServicegetThreadExecutor(int nThreads)
get Thread Executor 
return Executors.newFixedThreadPool(nThreads);
booleanisCorrectCollectionSizeTimeOut(Collection collection, int size, long timeout, TimeUnit unit)
Check size of a collection populated in another thread. 
Runnable task = () -> {
    try {
        while (collection.size() != size) {
            TimeUnit.MILLISECONDS.sleep(10);
    } catch (InterruptedException e) {
        throw new IllegalStateException("task interrupted", e);
};
ExecutorService executor = Executors.newSingleThreadExecutor();
executor.submit(task);
executor.shutdown();
return executor.awaitTermination(timeout, unit);
booleanisRegularlyDone(Future future)
Checks if the specified Future terminated regularly, e.g. 
try {
    future.get();
} catch (InterruptedException | ExecutionException e) {
    return false;
return true;
booleanisShutdown(Executor executor)
is Shutdown 
if (executor instanceof ExecutorService) {
    if (((ExecutorService) executor).isShutdown()) {
        return true;
return false;