2 * Copyright (c) 2014 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.controller.md.statistics.manager;
10 import org.opendaylight.controller.sal.binding.api.data.DataBrokerService;
11 import org.opendaylight.controller.sal.binding.api.data.DataChangeListener;
12 import org.opendaylight.yangtools.concepts.ListenerRegistration;
13 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
14 import org.slf4j.Logger;
15 import org.slf4j.LoggerFactory;
17 import com.google.common.base.Preconditions;
19 abstract class AbstractListeningStatsTracker<I, K> extends AbstractStatsTracker<I, K> implements AutoCloseable, DataChangeListener {
20 private static final Logger logger = LoggerFactory.getLogger(AbstractListeningStatsTracker.class);
21 private ListenerRegistration<?> reg;
23 protected AbstractListeningStatsTracker(FlowCapableContext context, long lifetimeNanos) {
24 super(context, lifetimeNanos);
27 protected abstract InstanceIdentifier<?> listenPath();
28 protected abstract String statName();
30 public void start(final DataBrokerService dbs) {
31 Preconditions.checkState(reg == null);
33 reg = dbs.registerDataChangeListener(listenPath(), this);
34 logger.debug("{} Statistics tracker for node {} started", statName(), getNodeIdentifier());
38 public final void close() {
42 } catch (Exception e) {
43 logger.warn("Failed to stop {} Statistics tracker for node {}", statName(), getNodeIdentifier(), e);