BUG 8629: Try to allow notification processing to finish in unsubscribe of listeners.

[controller.git] / opendaylight / md-sal / samples / clustering-test-app / provider / src / main / java / org / opendaylight / controller / clustering / it / provider / impl / IdIntsDOMDataTreeLIstener.java

diff --git a/opendaylight/md-sal/samples/clustering-test-app/provider/src/main/java/org/opendaylight/controller/clustering/it/provider/impl/IdIntsDOMDataTreeLIstener.java b/opendaylight/md-sal/samples/clustering-test-app/provider/src/main/java/org/opendaylight/controller/clustering/it/provider/impl/IdIntsDOMDataTreeLIstener.java
index 1fa3f1b61b24367a377202e1dddf635cb727ea02..f5b55fd0775eaf3f3442fcc98de9c06d8b467ba1 100644 (file)
--- a/opendaylight/md-sal/samples/clustering-test-app/provider/src/main/java/org/opendaylight/controller/clustering/it/provider/impl/IdIntsDOMDataTreeLIstener.java
+++ b/opendaylight/md-sal/samples/clustering-test-app/provider/src/main/java/org/opendaylight/controller/clustering/it/provider/impl/IdIntsDOMDataTreeLIstener.java
@@ -9,8 +9,15 @@
 package org.opendaylight.controller.clustering.it.provider.impl;
 
 import com.google.common.base.Preconditions;
+import com.google.common.util.concurrent.SettableFuture;
 import java.util.Collection;
 import java.util.Map;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.ScheduledFuture;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicLong;
 import javax.annotation.Nonnull;
 import org.opendaylight.mdsal.dom.api.DOMDataTreeIdentifier;
 import org.opendaylight.mdsal.dom.api.DOMDataTreeListener;
@@ -23,8 +30,12 @@ import org.slf4j.LoggerFactory;
 public class IdIntsDOMDataTreeLIstener implements DOMDataTreeListener {
 
     private static final Logger LOG = LoggerFactory.getLogger(IdIntsDOMDataTreeLIstener.class);
+    private static final long SECOND_AS_NANO = 1000000000;
 
     private NormalizedNode<?, ?> localCopy = null;
+    private AtomicLong lastNotifTimestamp = new AtomicLong(0);
+    private ScheduledFuture<?> scheduledFuture;
+    private ScheduledExecutorService executorService;
 
     @Override
     public void onDataTreeChanged(@Nonnull final Collection<DataTreeCandidate> changes,
@@ -33,6 +44,8 @@ public class IdIntsDOMDataTreeLIstener implements DOMDataTreeListener {
         // There should only be one candidate reported
         Preconditions.checkState(changes.size() == 1);
 
+        lastNotifTimestamp.set(System.nanoTime());
+
         // do not log the change into debug, only use trace since it will lead to OOM on default heap settings
         LOG.debug("Received data tree changed");
 
@@ -64,7 +77,35 @@ public class IdIntsDOMDataTreeLIstener implements DOMDataTreeListener {
         return localCopy != null;
     }
 
+    public Future<Void> tryFinishProcessing() {
+        executorService = Executors.newSingleThreadScheduledExecutor();
+        final SettableFuture<Void> settableFuture = SettableFuture.create();
+
+        scheduledFuture = executorService.scheduleAtFixedRate(new CheckFinishedTask(settableFuture), 0, 1, TimeUnit.SECONDS);
+        return settableFuture;
+    }
+
     public boolean checkEqual(final NormalizedNode<?, ?> expected) {
         return localCopy.equals(expected);
     }
+
+    private class CheckFinishedTask implements Runnable {
+
+        private final SettableFuture<Void> future;
+
+        CheckFinishedTask(final SettableFuture<Void> future) {
+            this.future = future;
+        }
+
+        @Override
+        public void run() {
+            if (System.nanoTime() - lastNotifTimestamp.get() > (SECOND_AS_NANO * 4)) {
+                scheduledFuture.cancel(false);
+                future.set(null);
+
+                executorService.shutdown();
+            }
+        }
+    }
+
 }