+/*
+ * Copyright (c) 2017 Cisco Systems, Inc. and others. All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+
+package org.opendaylight.controller.clustering.it.provider.impl;
+
+import com.google.common.base.Preconditions;
+import java.util.Collection;
+import javax.annotation.Nonnull;
+import org.opendaylight.controller.md.sal.dom.api.DOMDataTreeChangeListener;
+import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
+import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTree;
+import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidate;
+import org.opendaylight.yangtools.yang.data.api.schema.tree.TreeType;
+import org.opendaylight.yangtools.yang.data.impl.schema.tree.InMemoryDataTreeFactory;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class IdIntsListener implements DOMDataTreeChangeListener {
+
+ private static final Logger LOG = LoggerFactory.getLogger(IdIntsListener.class);
+
+ private NormalizedNode<?, ?> localCopy = null;
+
+ @Override
+ public void onDataTreeChanged(@Nonnull final Collection<DataTreeCandidate> changes) {
+
+ // There should only be one candidate reported
+ Preconditions.checkState(changes.size() == 1);
+
+ // 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");
+
+ changes.forEach(change -> {
+ if (change.getRootNode().getDataAfter().isPresent()) {
+ LOG.trace("Received change, data before: {}, data after: ", change.getRootNode().getDataBefore().get(),
+ change.getRootNode().getDataAfter().get());
+
+ if (localCopy == null || checkEqual(change.getRootNode().getDataBefore().get())) {
+ localCopy = change.getRootNode().getDataAfter().get();
+ } else {
+ LOG.debug("Ignoring notification: {}", change);
+ }
+ } else {
+ LOG.warn("getDataAfter() is missing from notification. change: {}", change);
+ }
+ });
+ }
+
+ public boolean checkEqual(final NormalizedNode<?, ?> expected) {
+ return localCopy.equals(expected);
+ }
+}