show active threads in metrics

src/main/java/com/commafeed/backend/feeds/FeedRefreshExecutor.java

@@ -17,7 +17,8 @@ public class FeedRefreshExecutor {
 	private ThreadPoolExecutor pool;
 	private LinkedBlockingDeque<Runnable> queue;
 
-	public FeedRefreshExecutor(final String poolName, int threads, int queueCapacity) {
+	public FeedRefreshExecutor(final String poolName, int threads,
+			int queueCapacity) {
 		this.poolName = poolName;
 		pool = new ThreadPoolExecutor(threads, threads, 0,
 				TimeUnit.MILLISECONDS,
@@ -46,7 +47,8 @@ public class FeedRefreshExecutor {
 						queue.put(r);
 					}
 				} catch (InterruptedException e1) {
-					log.error(poolName + " interrupted while waiting for queue.", e1);
+					log.error(poolName
+							+ " interrupted while waiting for queue.", e1);
 				}
 			}
 		});
@@ -60,6 +62,10 @@ public class FeedRefreshExecutor {
 		return queue.size();
 	}
 
+	public int getActiveCount() {
+		return pool.getActiveCount();
+	}
+
 	public static interface Task extends Runnable {
 		boolean isUrgent();
 	}
@@ -70,7 +76,9 @@ public class FeedRefreshExecutor {
 			try {
 				Thread.sleep(100);
 			} catch (InterruptedException e) {
-				log.error("{} interrupted while waiting for threads to finish.", poolName);
+				log.error(
+						"{} interrupted while waiting for threads to finish.",
+						poolName);
 			}
 		}
 	}

src/main/java/com/commafeed/backend/feeds/FeedRefreshUpdater.java

@@ -185,4 +185,8 @@ public class FeedRefreshUpdater {
 		return pool.getQueueSize();
 	}
 
+	public int getActiveCount() {
+		return pool.getActiveCount();
+	}
+
 }

src/main/java/com/commafeed/backend/feeds/FeedRefreshWorker.java

@@ -53,7 +53,8 @@ public class FeedRefreshWorker {
 		ApplicationSettings settings = applicationSettingsService.get();
 		int threads = settings.getBackgroundThreads();
 		log.info("Creating refresh worker pool with {} threads", threads);
-		pool = new FeedRefreshExecutor("FeedRefreshUpdater", threads, 20 * threads);
+		pool = new FeedRefreshExecutor("FeedRefreshUpdater", threads,
+				20 * threads);
 	}
 
 	@PreDestroy
@@ -64,11 +65,15 @@ public class FeedRefreshWorker {
 	public void updateFeed(Feed feed) {
 		pool.execute(new FeedTask(feed));
 	}
-	
-	public int getQueueSize(){
+
+	public int getQueueSize() {
 		return pool.getQueueSize();
 	}
 
+	public int getActiveCount() {
+		return pool.getActiveCount();
+	}
+
 	private class FeedTask implements Task {
 
 		private Feed feed;
@@ -125,7 +130,8 @@ public class FeedRefreshWorker {
 			feedRefreshUpdater.updateFeed(feed, entries);
 
 		} catch (NotModifiedException e) {
-			log.debug("Feed not modified : {} - {}", feed.getUrl(), e.getMessage());
+			log.debug("Feed not modified : {} - {}", feed.getUrl(),
+					e.getMessage());
 
 			Date disabledUntil = null;
 			if (applicationSettingsService.get().isHeavyLoad()) {