2 * Copyright (c) 2015 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.openflowplugin.applications.notification.supplier.impl;
10 import static java.util.Objects.requireNonNull;
12 import com.google.common.base.Preconditions;
13 import org.opendaylight.mdsal.binding.api.DataBroker;
14 import org.opendaylight.mdsal.binding.api.DataTreeChangeListener;
15 import org.opendaylight.mdsal.binding.api.DataTreeIdentifier;
16 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
17 import org.opendaylight.openflowplugin.applications.notification.supplier.NotificationSupplierDefinition;
18 import org.opendaylight.openflowplugin.common.wait.SimpleTaskRetryLooper;
19 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeId;
20 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeRef;
21 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.Nodes;
22 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.nodes.Node;
23 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.nodes.NodeKey;
24 import org.opendaylight.yangtools.concepts.ListenerRegistration;
25 import org.opendaylight.yangtools.yang.binding.DataObject;
26 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
27 import org.opendaylight.yangtools.yang.binding.KeyedInstanceIdentifier;
28 import org.slf4j.Logger;
29 import org.slf4j.LoggerFactory;
32 * Public abstract basic Supplier implementation contains code for a make Supplier instance,
33 * registration Supplier like {@link DataTreeChangeListener}
34 * and close method. In additional case, it contains help methods for all Supplier implementations.
36 * @param <O> - data tree item Object extends {@link DataObject}
38 public abstract class AbstractNotificationSupplierBase<O extends DataObject> implements
39 NotificationSupplierDefinition<O> {
41 private static final Logger LOG = LoggerFactory.getLogger(AbstractNotificationSupplierBase.class);
43 protected final Class<O> clazz;
44 private ListenerRegistration<DataTreeChangeListener<O>> listenerRegistration;
45 private static final int STARTUP_LOOP_TICK = 500;
46 private static final int STARTUP_LOOP_MAX_RETRIES = 8;
49 final DataTreeIdentifier<O> treeId = DataTreeIdentifier.create(LogicalDatastoreType.OPERATIONAL, getWildCardPath());
52 * Default constructor for all Notification Supplier implementation.
54 * @param db - {@link DataBroker}
55 * @param clazz - API contract class extended {@link DataObject}
57 @SuppressWarnings("IllegalCatch")
58 public AbstractNotificationSupplierBase(final DataBroker db, final Class<O> clazz) {
59 Preconditions.checkArgument(db != null, "DataBroker can not be null!");
62 SimpleTaskRetryLooper looper = new SimpleTaskRetryLooper(STARTUP_LOOP_TICK, STARTUP_LOOP_MAX_RETRIES);
64 listenerRegistration = looper
65 .loopUntilNoException(
66 () -> db.registerDataTreeChangeListener(treeId, AbstractNotificationSupplierBase.this));
67 } catch (final Exception ex) {
68 LOG.debug("AbstractNotificationSupplierBase DataTreeChange listener registration fail ..{}",
70 throw new IllegalStateException("Notification supplier startup fail! System needs restart.", ex);
76 if (listenerRegistration != null) {
77 listenerRegistration.close();
78 listenerRegistration = null;
83 * Method returns a wildCard {@link InstanceIdentifier} for {@link Node} from inventory
84 * because this path is a base for every OF paths.
86 * @return WildCarded InstanceIdentifier for Node
88 protected static InstanceIdentifier<Node> getNodeWildII() {
89 return InstanceIdentifier.create(Nodes.class).child(Node.class);
93 * Method returns a keyed {@link InstanceIdentifier} for {@link Node} from inventory
94 * because this path is a base for every OF paths.
96 * @param ii - key for keyed {@link Node} {@link InstanceIdentifier}
97 * @return Keyed InstanceIdentifier for Node
99 protected static KeyedInstanceIdentifier<Node, NodeKey> getNodeII(final InstanceIdentifier<?> ii) {
100 final NodeKey key = ii.firstKeyOf(Node.class);
101 Preconditions.checkArgument(key != null);
102 return InstanceIdentifier.create(Nodes.class).child(Node.class, key);
106 * Create a node reference.
108 * @param path pointer to element
109 * @return extracted {@link NodeKey} and wrapped in {@link NodeRef}
111 public static NodeRef createNodeRef(final InstanceIdentifier<?> path) {
112 final InstanceIdentifier<Node> nodePath = requireNonNull(path.firstIdentifierOf(Node.class));
113 return new NodeRef(nodePath);
117 * Get the node identifier.
119 * @param path pointer to element
120 * @return extracted {@link NodeId}
122 public static NodeId getNodeId(final InstanceIdentifier<?> path) {
123 final NodeKey nodeKey = requireNonNull(path.firstKeyOf(Node.class));
124 return nodeKey.getId();