executorservice

I have a ScheduledThreadPoolExecutor which has one thread and runs for every 30 seconds. Now, if the current executing thread throws some exception, then I need to make sure that the next thread do not run and the the ScheduledThreadPoolExecutor is down. How do I achieve this? As a clean way, you can simply use a static accessed class to set/check the execution availability. import java.util.concurrent.atomic.AtomicBoolean; class ThreadManager { private static AtomicBoolean shouldStop = new AtomicBoolean(false); public static void setExceptionThrown(boolean val) { shouldStop.set(val); } public

I need to make a library in which I will have synchronous and asynchronous methods in it. executeSynchronous() - waits until I have a result, returns the result. executeAsynchronous() - returns a Future immediately which can be processed after other things are done, if needed. Core Logic of my Library The customer will use our library and they will call it by passing DataKey builder object. We will then construct a URL by using that DataKey object and make a HTTP client call to that URL by executing it and after we get the response back as a JSON String, we will send that JSON String back to

I have a problem with handling socket in java. I am running a TCP server with multiple client connections. For performance reason, I used a simple thread pool to handle packets. Please see code below public enum LazyWorkCenter { instance; LazyWorkCenter() { lazyWorker = new NamedThreadPoolExecutor(3,3, 0L,TimeUnit.MILLISECONDS, "LazyWorker"); } private ExecutorService lazyWorker ; public void executeLazy(Runnable lazyTask) { lazyWorker.execute(lazyTask); } } public class TcpServerForClient { DataOutputStream out = null; DataInputStream in = null; public void onConnect(ServerSocket socket)

Here is my code snippet. ExecutorService executor = Executors.newFixedThreadPool(ThreadPoolSize); while(conditionTrue) { ClassImplementingRunnable c = new ClassImplementingRunnable(); executor.submit(c); } Now after this is do executor.shutdown(); What i want to achieve here is that i want to wait for all the threads in the threadpool to have finished the execution and then i want to shutdown the executor. But i guess this is not what is happening here. The main thread seems to be executing shutdown and it just shuts down everything. Before when my threadpool size was 2, i did the following

My code: String[] torrentFiles = new File("/root/torrents/").list(); if(torrentFiles.length == 0 || torrentFiles == null) { System.exit(0); } ex = Executors.newFixedThreadPool(3); for(String torrentFile : torrentFiles) { ex.submit(new DownloadTorrent("/root/torrents/" + torrentFile)); } ex.shutdown(); try { ex.awaitTermination(30, TimeUnit.MINUTES); } catch(InterruptedException ex1) { Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex1); } But sometimes torrent downloading takes unknown time value and « awaitTermination » not works as I want. I need to stop all executed threads

I am using asyncTasks, to load list elements with images (Just followed android's tutorial of efficiently loading bitmaps) In DDMS, i can see upto 5 AsyncTasks being running Now in addition i have added another AsyncTask, which performs some decoding using MediaCodec class. Now in DDMS, i still see 5 AsyncTasks, and my image loading aynctask or decoding async task executes, not both of them. When decoding is running, if i scroll the list, elements' images are not updated Counterly when i launch new decoding asynctask by calling it's execute method, the decoding doesn't start, but if i scroll

I have a newbie question. I have this code: public class Main { public static void main(String[] args) throws InterruptedException { // TODO Auto-generated method stub IntHolder aHolder=new IntHolder(); aHolder.Number=0; IncrementorThread A= new IncrementorThread(1, aHolder); IncrementorThread B= new IncrementorThread(2, aHolder); IncrementorThread C= new IncrementorThread(3, aHolder); A.start(); B.start(); C.start(); A.join(); B.join(); C.join(); System.out.println("All threads completed..."); } } Which will wait for all threads to complete. If I use Executors like this: public class Main {