2 * Copyright (c) 2013 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.bgpcep.pcep.topology.provider;
10 import com.google.common.base.Optional;
11 import com.google.common.base.Preconditions;
12 import com.google.common.util.concurrent.FutureCallback;
13 import com.google.common.util.concurrent.Futures;
14 import com.google.common.util.concurrent.ListenableFuture;
15 import com.google.common.util.concurrent.MoreExecutors;
16 import java.util.Collection;
17 import java.util.HashMap;
19 import javax.annotation.concurrent.ThreadSafe;
20 import org.opendaylight.controller.md.sal.binding.api.BindingTransactionChain;
21 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
22 import org.opendaylight.controller.md.sal.binding.api.ReadOnlyTransaction;
23 import org.opendaylight.controller.md.sal.binding.api.ReadWriteTransaction;
24 import org.opendaylight.controller.md.sal.binding.api.WriteTransaction;
25 import org.opendaylight.controller.md.sal.common.api.data.AsyncTransaction;
26 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
27 import org.opendaylight.controller.md.sal.common.api.data.TransactionChain;
28 import org.opendaylight.controller.md.sal.common.api.data.TransactionChainListener;
29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev131024.lsp.metadata.Metadata;
30 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NodeId;
31 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.Topology;
32 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
33 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.NodeBuilder;
34 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.NodeKey;
35 import org.opendaylight.yangtools.yang.binding.DataObject;
36 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
37 import org.opendaylight.yangtools.yang.binding.KeyedInstanceIdentifier;
38 import org.slf4j.Logger;
39 import org.slf4j.LoggerFactory;
42 final class TopologyNodeState implements AutoCloseable, TransactionChainListener {
43 private static final Logger LOG = LoggerFactory.getLogger(TopologyNodeState.class);
44 private final Map<String, Metadata> metadata = new HashMap<>();
45 private final KeyedInstanceIdentifier<Node, NodeKey> nodeId;
46 private final BindingTransactionChain chain;
47 private final long holdStateNanos;
48 private long lastReleased = 0;
49 //cache initial node state, if any node was persisted
50 private Node initialNodeState = null;
52 public TopologyNodeState(final DataBroker broker, final InstanceIdentifier<Topology> topology, final NodeId id, final long holdStateNanos) {
53 Preconditions.checkArgument(holdStateNanos >= 0);
54 this.nodeId = topology.child(Node.class, new NodeKey(id));
55 this.holdStateNanos = holdStateNanos;
56 this.chain = broker.createTransactionChain(this);
59 public KeyedInstanceIdentifier<Node, NodeKey> getNodeId() {
63 public synchronized Metadata getLspMetadata(final String name) {
64 return this.metadata.get(name);
67 public synchronized void setLspMetadata(final String name, final Metadata value) {
69 this.metadata.remove(name);
71 this.metadata.put(name, value);
75 public synchronized void cleanupExcept(final Collection<String> values) {
76 this.metadata.keySet().removeIf(s -> !values.contains(s));
79 public synchronized void released(final boolean persist) {
80 // The session went down. Undo all the Topology changes we have done.
81 // We might want to persist topology node for later re-use.
83 final WriteTransaction trans = beginTransaction();
84 trans.delete(LogicalDatastoreType.OPERATIONAL, this.nodeId);
85 Futures.addCallback(trans.submit(), new FutureCallback<Void>() {
87 public void onSuccess(final Void result) {
88 LOG.trace("Internal state for node {} cleaned up successfully", TopologyNodeState.this.nodeId);
92 public void onFailure(final Throwable t) {
93 LOG.error("Failed to cleanup internal state for session {}", TopologyNodeState.this.nodeId, t);
95 }, MoreExecutors.directExecutor());
98 this.lastReleased = System.nanoTime();
101 public synchronized void taken(final boolean retrieveNode) {
102 final long now = System.nanoTime();
104 if (now - this.lastReleased > this.holdStateNanos) {
105 this.metadata.clear();
108 //try to get the topology's node
110 Futures.addCallback(readOperationalData(this.nodeId), new FutureCallback<Optional<Node>>() {
113 public void onSuccess(final Optional<Node> result) {
114 if (!result.isPresent()) {
117 //cache retrieved node
118 TopologyNodeState.this.initialNodeState = result.get();
123 public void onFailure(final Throwable t) {
124 LOG.error("Failed to get topology node {}", TopologyNodeState.this.nodeId, t);
126 }, MoreExecutors.directExecutor());
132 public synchronized Node getInitialNodeState() {
133 return this.initialNodeState;
136 WriteTransaction beginTransaction() {
137 return this.chain.newWriteOnlyTransaction();
140 ReadWriteTransaction rwTransaction() {
141 return this.chain.newReadWriteTransaction();
144 <T extends DataObject> ListenableFuture<Optional<T>> readOperationalData(final InstanceIdentifier<T> id) {
145 try (final ReadOnlyTransaction t = this.chain.newReadOnlyTransaction()) {
146 return t.read(LogicalDatastoreType.OPERATIONAL, id);
151 public void onTransactionChainFailed(final TransactionChain<?, ?> chain, final AsyncTransaction<?, ?> transaction, final Throwable cause) {
152 // FIXME: flip internal state, so that the next attempt to update fails, triggering node reconnect
153 LOG.error("Unexpected transaction failure in node {} transaction {}", this.nodeId, transaction.getIdentifier(), cause);
157 public void onTransactionChainSuccessful(final TransactionChain<?, ?> chain) {
158 LOG.info("Node {} shutdown successfully", this.nodeId);
162 public void close() {
166 private void putTopologyNode() {
167 final Node node = new NodeBuilder().setKey(this.nodeId.getKey()).setNodeId(this.nodeId.getKey().getNodeId()).build();
168 final WriteTransaction t = beginTransaction();
169 t.put(LogicalDatastoreType.OPERATIONAL, this.nodeId, node);