async

src/main/java/de/mrbesen/telegram/AsyncHandler.java

@@ -9,11 +9,20 @@ import org.json.JSONObject;
 public class AsyncHandler implements Runnable {
 
 	private List<Task> tasks = new LinkedList<>();
-	private Thread asynchandlerthread = null;
+	private Thread[] asynchandlerthread;
+	private int threadsRunning = 0;
 	private TelegramAPI api;
+	private static final String THREADPREFIX = "AsyncTgHandler-";
 
+	//just use 1 async thread
 	public AsyncHandler(TelegramAPI api) {
+		this(api, 1);
+	}
+
+	//allow as many as threadCount threads to handle Async Tasks
+	public AsyncHandler(TelegramAPI api, int threadCount) {
 		this.api = api;
+		asynchandlerthread = new Thread[threadCount];
 	}
 
 	public void enque(Task t) {
@@ -31,19 +40,34 @@ public class AsyncHandler implements Runnable {
 			}
 		}
 
-		//make sure its running
-		if(asynchandlerthread == null) {
-			asynchandlerthread = new Thread(this, "AsyncHandler");
-			asynchandlerthread.start();
-		} else if(!asynchandlerthread.isAlive()) {
-			asynchandlerthread = null;
-		}
+		//muss nicht im syncronized liegen, weil es nur ein read ist
+		ensureThreads(tasks.size());
 	}
 
 	public void enque(String request, String parameters) {
 		enque(new Task(request, parameters));
 	}
 
+	//makes sure, that at least count Threads are running
+	private void ensureThreads(int count) {
+		if(count < 1) count = 1;
+
+		synchronized (asynchandlerthread) {
+			if(threadsRunning >= count) return; //mus im syncronized liegen, damit es nicht zu problemen kommt, wenn diese funktion parallel aufgerufen wird
+
+			//alle threads durchgehen und leere (null) mit neuen Threads füllen
+			for(int i = 0; i < asynchandlerthread.length && count > 0; i++) {
+				if(asynchandlerthread[i] == null) {
+					//spawn a thread
+					asynchandlerthread[i] = new Thread(this, THREADPREFIX + i);
+					asynchandlerthread[i].start();
+					threadsRunning++;
+				}
+				count --;
+			}
+		}
+	}
+
 	@Override
 	public void run() {
 		int failed = 0;
@@ -68,7 +92,7 @@ public class AsyncHandler implements Runnable {
 						//	throw new Exception("Callbacktype missmatch! Got " + obj.getClass().getSimpleName() + " Wanted: " + wanted.getSimpleName() );
 					}
 					failed = 0;
-				} catch(UnknownHostException ex) {//host(api.telegram.org) is good -> bad inet
+				} catch(UnknownHostException ex) { //host(api.telegram.org) is good -> bad inet
 					failed ++;
 					if(failed > 10)
 						try {
@@ -87,7 +111,13 @@ public class AsyncHandler implements Runnable {
 				t.printStackTrace();
 			}
 		}
-		asynchandlerthread = null;
+
+		int threadid = Integer.parseInt(Thread.currentThread().getName().substring(THREADPREFIX.length()));
+
+		synchronized (asynchandlerthread) {
+			threadsRunning --;
+			asynchandlerthread[threadid] = null; //delete thread
+		}
 	}
 
 	public static class Task {