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 static com.google.common.base.Preconditions.checkArgument;
12 import com.google.common.util.concurrent.FluentFuture;
13 import com.google.common.util.concurrent.FutureCallback;
14 import com.google.common.util.concurrent.MoreExecutors;
15 import java.util.Collection;
16 import java.util.HashMap;
18 import java.util.Optional;
19 import java.util.concurrent.ExecutionException;
20 import org.checkerframework.checker.lock.qual.GuardedBy;
21 import org.checkerframework.checker.lock.qual.Holding;
22 import org.eclipse.jdt.annotation.NonNull;
23 import org.opendaylight.mdsal.binding.api.DataBroker;
24 import org.opendaylight.mdsal.binding.api.ReadTransaction;
25 import org.opendaylight.mdsal.binding.api.Transaction;
26 import org.opendaylight.mdsal.binding.api.TransactionChain;
27 import org.opendaylight.mdsal.binding.api.TransactionChainListener;
28 import org.opendaylight.mdsal.binding.api.WriteTransaction;
29 import org.opendaylight.mdsal.common.api.CommitInfo;
30 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
31 import org.opendaylight.protocol.pcep.PCEPSession;
32 import org.opendaylight.protocol.pcep.TerminationReason;
33 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev220730.Node1;
34 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev220730.lsp.metadata.Metadata;
35 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NodeId;
36 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.Topology;
37 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
38 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.NodeBuilder;
39 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.NodeKey;
40 import org.opendaylight.yangtools.yang.binding.DataObject;
41 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
42 import org.opendaylight.yangtools.yang.binding.KeyedInstanceIdentifier;
43 import org.slf4j.Logger;
44 import org.slf4j.LoggerFactory;
46 // This class is thread-safe
47 final class TopologyNodeState implements TransactionChainListener {
48 private static final Logger LOG = LoggerFactory.getLogger(TopologyNodeState.class);
50 private final Map<String, Metadata> metadata = new HashMap<>();
51 private final KeyedInstanceIdentifier<Node, NodeKey> nodeId;
52 private final TransactionChain chain;
53 private final long holdStateNanos;
54 private long lastReleased = 0;
55 //cache initial node state, if any node was persisted
57 private Node initialNodeState = null;
59 TopologyNodeState(final DataBroker broker, final InstanceIdentifier<Topology> topology, final NodeId id,
60 final long holdStateNanos) {
61 checkArgument(holdStateNanos >= 0);
62 nodeId = topology.child(Node.class, new NodeKey(id));
63 this.holdStateNanos = holdStateNanos;
64 chain = broker.createMergingTransactionChain(this);
67 @NonNull KeyedInstanceIdentifier<Node, NodeKey> getNodeId() {
71 synchronized Metadata getLspMetadata(final String name) {
72 return metadata.get(name);
75 synchronized void setLspMetadata(final String name, final Metadata value) {
77 metadata.remove(name);
79 metadata.put(name, value);
83 synchronized void cleanupExcept(final Collection<String> values) {
84 metadata.keySet().removeIf(s -> !values.contains(s));
87 synchronized void released(final boolean persist) {
88 // The session went down. Undo all the Topology changes we have done.
89 // We might want to persist topology node for later re-use.
91 final WriteTransaction trans = chain.newWriteOnlyTransaction();
92 trans.delete(LogicalDatastoreType.OPERATIONAL, nodeId);
93 trans.commit().addCallback(new FutureCallback<CommitInfo>() {
95 public void onSuccess(final CommitInfo result) {
96 LOG.trace("Internal state for node {} cleaned up successfully", nodeId);
100 public void onFailure(final Throwable throwable) {
101 LOG.error("Failed to cleanup internal state for session {}", nodeId, throwable);
103 }, MoreExecutors.directExecutor());
107 lastReleased = System.nanoTime();
110 synchronized void taken(final boolean retrieveNode) {
111 final long now = System.nanoTime();
113 if (now - lastReleased > holdStateNanos) {
117 //try to get the topology's node
120 // FIXME: we really should not be performing synchronous operations
121 final Optional<Node> prevNode = readOperationalData(nodeId).get();
122 if (!prevNode.isPresent()) {
125 //cache retrieved node
126 initialNodeState = prevNode.get();
128 } catch (final ExecutionException | InterruptedException throwable) {
129 LOG.error("Failed to get topology node {}", nodeId, throwable);
136 synchronized Node getInitialNodeState() {
137 return initialNodeState;
140 synchronized TransactionChain getChain() {
144 synchronized <T extends DataObject> FluentFuture<Optional<T>> readOperationalData(
145 final InstanceIdentifier<T> id) {
146 try (ReadTransaction t = chain.newReadOnlyTransaction()) {
147 return t.read(LogicalDatastoreType.OPERATIONAL, id);
152 public void onTransactionChainFailed(final TransactionChain pchain, final Transaction transaction,
153 final Throwable cause) {
154 // FIXME: flip internal state, so that the next attempt to update fails, triggering node reconnect
155 LOG.error("Unexpected transaction failure in node {} transaction {}", nodeId, transaction.getIdentifier(),
161 public void onTransactionChainSuccessful(final TransactionChain pchain) {
162 LOG.info("Node {} shutdown successfully", nodeId);
165 synchronized void close() {
170 private void putTopologyNode() {
171 final Node node = new NodeBuilder().withKey(nodeId.getKey()).build();
172 final WriteTransaction tx = chain.newWriteOnlyTransaction();
173 LOG.trace("Put topology Node {}, value {}", nodeId, node);
174 // FIXME: why is this a 'merge' and not a 'put'? This seems to be related to BGPCEP-739, but there is little
175 // evidence as to what exactly was being overwritten
176 tx.merge(LogicalDatastoreType.OPERATIONAL, nodeId, node);
177 tx.commit().addCallback(new FutureCallback<CommitInfo>() {
179 public void onSuccess(final CommitInfo result) {
180 LOG.trace("Topology Node stored {}, value {}", nodeId, node);
184 public void onFailure(final Throwable throwable) {
185 LOG.error("Put topology Node failed {}, value {}", nodeId, node, throwable);
187 }, MoreExecutors.directExecutor());
190 void storeNode(final InstanceIdentifier<Node1> topologyAugment, final Node1 ta, final PCEPSession session) {
191 LOG.trace("Peer data {} set to {}", topologyAugment, ta);
193 final FluentFuture<? extends CommitInfo> future;
194 synchronized (this) {
195 final WriteTransaction trans = chain.newWriteOnlyTransaction();
196 trans.put(LogicalDatastoreType.OPERATIONAL, topologyAugment, ta);
197 // All set, commit the modifications
198 future = trans.commit();
201 future.addCallback(new FutureCallback<CommitInfo>() {
203 public void onSuccess(final CommitInfo result) {
204 LOG.trace("Node stored {} for session {} updated successfully", topologyAugment, session);
208 public void onFailure(final Throwable cause) {
209 LOG.error("Failed to store node {} for session {}, terminating it", topologyAugment, session, cause);
210 session.close(TerminationReason.UNKNOWN);
212 }, MoreExecutors.directExecutor());