queue size in metrics

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

@@ -3,6 +3,7 @@ package com.commafeed.backend.feeds;
 import java.util.Collection;
 import java.util.List;
 import java.util.concurrent.ArrayBlockingQueue;
+import java.util.concurrent.BlockingQueue;
 import java.util.concurrent.RejectedExecutionHandler;
 import java.util.concurrent.ThreadPoolExecutor;
 import java.util.concurrent.TimeUnit;
@@ -57,6 +58,7 @@ public class FeedRefreshUpdater {
 	FeedSubscriptionDAO feedSubscriptionDAO;
 
 	private ThreadPoolExecutor pool;
+	private BlockingQueue<Runnable> queue;
 	private Striped<Lock> locks;
 
 	@PostConstruct
@@ -66,8 +68,8 @@ public class FeedRefreshUpdater {
 		log.info("Creating database pool with {} threads", threads);
 		locks = Striped.lock(threads);
 		pool = new ThreadPoolExecutor(threads, threads, 0,
-				TimeUnit.MILLISECONDS, new ArrayBlockingQueue<Runnable>(
-						100 * threads));
+				TimeUnit.MILLISECONDS,
+				queue = new ArrayBlockingQueue<Runnable>(100 * threads));
 		pool.setRejectedExecutionHandler(new RejectedExecutionHandler() {
 			@Override
 			public void rejectedExecution(Runnable r, ThreadPoolExecutor e) {
@@ -149,4 +151,8 @@ public class FeedRefreshUpdater {
 		}
 	}
 
+	public int getQueueSize() {
+		return queue.size();
+	}
+
 }

src/main/java/com/commafeed/frontend/rest/resources/AbstractREST.java

@@ -36,6 +36,7 @@ import com.commafeed.backend.dao.UserRoleDAO;
 import com.commafeed.backend.dao.UserSettingsDAO;
 import com.commafeed.backend.feeds.FeedFetcher;
 import com.commafeed.backend.feeds.FeedRefreshTaskGiver;
+import com.commafeed.backend.feeds.FeedRefreshUpdater;
 import com.commafeed.backend.feeds.OPMLExporter;
 import com.commafeed.backend.feeds.OPMLImporter;
 import com.commafeed.backend.model.User;
@@ -116,6 +117,9 @@ public abstract class AbstractREST {
 	@Inject
 	FeedRefreshTaskGiver taskGiver;
 
+	@Inject
+	FeedRefreshUpdater feedRefreshUpdater;
+
 	@PostConstruct
 	public void init() {
 		CommaFeedApplication app = CommaFeedApplication.get();

src/main/java/com/commafeed/frontend/rest/resources/AdminREST.java

@@ -179,7 +179,8 @@ public class AdminREST extends AbstractResourceREST {
 		Map<String, ? extends Object> map = ImmutableMap.of("lastMinute",
 				metricsBean.getLastMinute(), "lastHour",
 				metricsBean.getLastHour(), "backlog",
-				feedDAO.getUpdatableCount());
+				feedDAO.getUpdatableCount(), "queue",
+				feedRefreshUpdater.getQueueSize());
 		return Response.ok(map).build();
 	}
 }